EP3189372A1

EP3189372A1 - Display device for demonstrating optical properties of eyeglasses

Info

Publication number: EP3189372A1
Application number: EP15747829.8A
Authority: EP
Inventors: Manfred Arnold; Marion KUPFER; Martin Brandl; Michael Stefan RILL; Johannes Kindt; Karsten Lindig; Jesús-Miguel CABEZA-GUILLÉN
Original assignee: Carl Zeiss Vision International GmbH; Carl Zeiss AG
Current assignee: Carl Zeiss Vision International GmbH; Carl Zeiss AG
Priority date: 2014-09-22
Filing date: 2015-08-12
Publication date: 2017-07-12
Also published as: DE102014116665B4; EP3199095A3; DE102015100147A1; US9968253B2; EP3166471B1; US10292581B2; PL3199095T3; US20170164827A1; WO2016046186A1; EP3199095B1; ES2715457T3; US20190125181A1; US10182717B2; DE102014116665A1; CN106659376A; CN106659376B; CN108604020A; US20170150882A1; EP3238607A1; US20170188813A1

Abstract

The invention relates to a display device (1) with a retaining device (2) which can be placed on the head of a user, a first image generator (22) which is secured or can be secured to the retaining device (2), and a first optical imaging system (6) which is secured to the retaining device (2) and which is designed to image an image generated on a first image plane (E) by the first image generator (22) such that the user can perceive the image with a first eye (LA) when the retaining device (2) is placed on the head of the user. According to the invention, the retaining device (2) supports a first refraction determining optical system (9) which is designed to determine the subjective refraction of the first eye (LA) when the retaining device (2) is placed on the head of the user and/or the first optical imaging system (6) is designed to be variable.

Description

Description:

Display device for demonstrating optical properties of spectacle lenses

The invention relates to a display device according to the preamble of patent claim 1, which is suitable for demonstrating optical properties of spectacle lenses. Furthermore, the invention relates to a system according to the preamble of claim 17.

At the ophthalmologist or optician, the eye is measured and the visual acuity is determined. The demonstration of different variants with words is difficult and strongly depends on

Appearances of the optician, the perception of the eyeglass lens customer and the given time. But you can not really demonstrate them without actually wearing glasses of the recommended type. That sometimes progressive lenses, which are classified by the user as "incompatible" and conform to the

Prescription eyeglass prescription and leads to a satisfied user only after choosing a different design, requires an objectification in the consultation and dispensing process of a pair of glasses.

JP 3 893 760 AI discloses the simulation of the visual impression of a spectacle wearer or the generation of a virtual visual impression of a spectacle wearer. For this purpose, an image on the retina of the spectacle wearer is simulated on the basis of an original image and displayed. In particular, the movement of the image is simulated when looking through a progressive lens, taking into account head movements.

EP 2 341 388 A1 describes a further development of the simulation described in JP 3 893 760 A1, in which the viewing direction of the spectacle wearer and thus the change in the

Puncture point of the line of vision associated with the line of vision from the eye through the eye

Progressive lens to the original image is taken into account. The simulation and display is done separately for each eye of the wearer.

EP 2 856 931 A1 takes a further development of the simulations described in JP 3 893 760 A1 and EP 2 341 388 A1. Instead of one before

recorded original image of the respective eyes associated cameras and in the optical axis direction of the cameras aligned distance sensors are provided. The

Direction of view of the spectacle wearer controls the alignment of the cameras and distance sensors. The images taken by the cameras are combined with those of the distance sensors determined distances used by the cameras object instead of the above-mentioned original image used as input variables for the simulation. The display is made on a so-called head-mounted display, which is installed in the same carrier for the cameras and the distance sensors

WO 2007/056795 A1 discloses a similar arrangement as described in EP 2 856 931 A1. In particular, a head-mounted spectacle lens simulator is described therein. The head-mounted eyeglass lens simulator comprises, depending on the execution as a mono- or

Stereo Image Simulator - One or two cameras that capture the scene of the wearer before or during the simulation. The simulation can measure the values measured by a wavefront sensor

Be aware of aberrations of the subject's eye. Furthermore or alternatively, the simulation may include the head and / or eye movements recorded by corresponding head and / or eye movement detectors, so-called head and / or eye trackers

consider. The simulation may further include the spectacle lens design, i. the optical properties of the spectacle lens for the viewer depending on the respective

Viewing point through the spectacle lens included include. They can be single-vision lenses, bifocal lenses or progressive lenses. The simulation may also include the socket size of the respective spectacle lenses. Finally, in addition to the

Visual impressions due to head movements and different directions of view through the respective spectacle lens are also superimposed on surfaces or lines of the scene presented to the observer, in order to avoid this zone boundary, such as e.g. Near and far range as well

Progression channel in the case of a progressive lens to illustrate.

DE 102009008 876 A1 describes a visual impact simulation device for simulating and displaying the actual visual impression of the person on the basis of measured refractive errors of an eye of a person and prescription values determined therefrom. The visual impression simulation device can, for. For example, use one of the methods described in Woojin Matthew Vu's MSc Thesis "Simulation of Vision through an Actual Human Optical System" issued in 2001 at the University of California, Berkley, USA or WO 2004/112576 A2

are described. Both documents describe methods for simulating visual impression based on wavefront data. So z. For example, the recipe values determined in the preceding step are subtracted from the measured wavefront, and the visual impression is simulated by folding the residual wavefront with a suitable test pattern. From WO 01/88654 A2 takes a computer that is set up on a

Screen the visual impression of a spectacle wearer looking through a plurality

different eyeglass lenses to display. In particular, this document extracts the depiction of a scene that the wearer of the glasses would perceive when looking through photochromic lenses under different weather conditions. Furthermore, the look through colored lenses, bifocal and progressive lenses, scratch-resistant lenses and anti-reflective lenses are described.

For the eyewear trade show Silmo 2015, visit http://www.acuite.fr/actualite/produit/76619/uncasque- 3d-en-magasin- pour-mieux-demontrer-les-benefices-des-verresigne? Utm_campaign = ecAcuite & utm_m (as of 9.7.2015) announced the presentation of a Head Mounted Display (HMD), allegedly with the appearance of seeing through different lenses for the wearer of glasses

can be displayed three-dimensionally. The operation of this device is not described there.

DE 10 2014 107 938 A1, from which the invention proceeds, takes one out

Display device in the form of an HMD with a holding device which can be placed on the head of a user and a first imaging optical system attached to the holding device, which is designed to image an image generated in an image plane as a virtual image in such a way that the user is in an upside-down state the holding device can perceive with a first eye.

This display device can for the second eye of the viewer one to the first

Imaging optics preferably have identical second imaging optics. In this case, one speaks of a stereo viewer.

The first imaging optics of the display device according to DE 10 2014 107 938 A1 has a first lens with a negative refractive power and a second lens with a positive refractive power spaced from the first lens. The first lens is positioned closer to the image plane than the second one

Lens. In the image plane, an imager is arranged, which generates the image, which is imaged by means of the first imaging optics. The imager is interchangeably arranged in the image plane. DE 102014 017 534 A1 describes a display device similar to the display device described in DE 10 2014 107 938 A1. This comprises a mountable on the head of a user holding device and a fixed to the holding device first

Imaging optics, which is designed to image a generated image in an image plane as a virtual image so that it can perceive the user with upside down holding device with a first eye. Deviating from the embodiment according to DE 102014 107 938 A1, the first imaging optics has as imaging element exactly one first lens with a first and a second boundary surface. The two boundary surfaces are each aspherically curved. In the image plane, as in the previously described embodiment, an image generator is arranged which generates the image which is imaged by means of the first imaging optics. The imager is interchangeably arranged there in the image plane.

For the subjective refraction determination it is according to https://de.wikipedia.org/wiki/

Refraction # Determination_of_subjective_refraction (state 9.7.2015) known from the prior art, the person to be examined sequentially systematically different lenses, so-called spectacle lenses, vorzuhalten and to ask for an improvement or deterioration of the visual impression. As a rule, such optotypes, which are also used to determine visual acuity, are offered as objects for viewing. The selection and provision of the spectacle lenses is greatly accelerated by the use of a Phoropters, an apparatus that can be switched quickly between different spectacle lenses back and forth. For this process can also be a

The test is continued until through

Changing the offered correction values no improvement of visual acuity is achieved more. The refractive index of the spectacle lenses thus selected is then the subjective refraction, taking into account the examination distance.

EP 2 363 058 B1 discloses a device for subjective refraction determination comprising two lenses. The first lens includes a plurality of adjacent first zones disposed across the lens in a first direction, each first zone having a different average effect. A plurality of adjacent second zones are disposed across the first lens in a second direction perpendicular to the first direction, each second zone having a different cylinder action. The first zones, which are arranged above the first lens in the first direction, overlap with the second zones, which are arranged above the first lens in the second direction. Both the mean effect and the Cylinder action changes by four diopters or more across the first lens. The second lens has a constant average action that is positioned relative to the lens so that a viewer can observe a target through the second lens and the lens having the varying mean and cylinder action.

Although the facilities described above, where the visual impression of a

Eyeglass wearer is brought to the simulation by demonstration to demonstrate optical properties of eyeglass lenses basically, there is a need for a simple demonstration device.

The object of the invention is therefore, by modification of a mono- or

Stereobildbetrachters of the generic type to provide a comparatively simple display device, which is suitable for demonstrating optical properties of spectacle lenses. This object is achieved by a display device having the features of patent claim 1. Advantageous embodiments and developments of the invention

Display device are the subject of the dependent claims. Furthermore, this object is achieved by a system having the features of claim 17. Advantageous embodiments and developments of this system are the subject of subclaim 18.

As already stated above, the invention is based on a mono or stereo image viewer. Such an image viewer constitutes a display device with a holding device which can be placed on the head of a user. The holding device either has a receptacle for a first imager or the first imager is optionally detachably fastened to the holding device. Furthermore, a first imaging optics is attached to the holding device. This imaging optics is designed and configured to image a picture generated by the first imager in a first image plane as a virtual image so that the user can perceive it with a first eye in the upside-down state of the holding device.

The invention now deviating from the above-described prior art, that the holding device carries a first refractive Bestimungsoptik formed in the upside down state of the holding device for determining the subjective refraction of the first eye. Alternatively or additionally, the first imaging optics can be designed changeable.

In particular, the first imaging optics can be made changeable from the outside in their optical effect (sphere, astigmatism and its orientation).

The purpose of the refractive optics is to compensate for the refractive deficit, in particular the spherical and cylindrical aberrations. The refraction-determining optic thus serves the user to demonstrate the correction of his new glasses. The purpose of the variable first imaging optics may be, in particular, to change the location of the focus of this imaging optics, thereby, for example, a

Accommodate accommodation in accordance with the intended new glasses for the user. Accordingly, the first imaging optics, like the above-described refraction-determining optics, serve to demonstrate to the user the correction of his new spectacles, including the individual ability to see nearby, taking into account the user's accommodating ability.

Accordingly, the object of the invention is achieved by using at least one of these optical elements, namely the first refraction-determining optics or the changeable ones

Completely solved embodiment of the first imaging optics.

In one embodiment of the invention, the first imaging optics can be designed to be variable in that this first imaging optics has at least one lens which is designed to be displaceable perpendicularly to the first image plane. Alternatively or additionally, the first imaging optics may comprise at least one lens which is designed to be displaceable and / or rotatable parallel to the first image plane. It is also possible for a lens to be displaceable and / or rotatable both in the direction perpendicular to the first image plane and parallel to the first image plane. By moving a lens of the first imaging optics in the direction of the surface normal of the first image plane, the focus of the first imaging optics shifts in the direction of this surface normal. By moving and / or rotating a lens of the first

Imaging optics parallel to the first image plane shifts the focus of the first Imaging optics in the plane parallel to the first image plane, in which the focus was originally located.

All the measures described above lead to the user's eye having to adjust to the new focus position by changing its accommodation.

Additionally or alternatively, it is also possible that the first imaging optics or a lens of the first imaging optics can be tilted. As a result, the inclination of the first imaging optics or the lens of the first imaging optics changes. By this measure, a prismatic effect can be demonstrated, which to compensate for a prismatic

Refraction deficits can be used.

An embodiment variant of the invention provides that the first refraction-determining optical system comprises one or more interchangeable measuring spectacle lenses. These can be constructed in a similar way to the measuring lenses of precision eyeglasses from ZEISS. The holding device may have corresponding holders for this purpose. The task of the spectacle lenses is to make an adjustment for the user that he can see pixels that appear to be at infinity, sharply, i. that its refraction deficit, measurable in sphere, cylinder and associated axis position, is thus compensated. The measuring glasses are spherical, toric or cylindrical single-vision lenses with a relatively small diameter of 2 to 2.5 cm, which are arranged relatively close, namely 10 to 15 mm from the corneal vertex and therefore still provide a sufficiently large field of view. With the spectacle lenses, the viewer is shown the correction of his new glasses in the distance. If the user has a refractive defect in both spherical and cylindrical action, e.g. a spherical spectacle lens for the correction of the spherical portion of the refractive deficit and a cylindrical spectacle lens for the correction of the cylindrical portion of the refractive deficit in the direction of the user to be arranged one behind the other. The measuring lens with cylindrical action can e.g. be made rotatable about its center axis to change the axis position.

It can also two measuring lenses with cylindrical or toric effect in

Viewing the observer arranged one behind the other, which is about a common axis Rotatable by adjustable angles to compensate for the astigmatism of the subject including its orientation.

The first refraction-determining optics may alternatively, ie instead of the measuring spectacle lenses, also comprise a lens with a plurality of adjacent first and second zones. The adjacent first zones are arranged over the lens in a first direction. Each first zone has a different mean effect. A plurality of adjacent second zones are disposed over the first lens in a second direction that is perpendicular to the first direction. Every second zone has a different cyber effect. The first zones, which are arranged above the first lens in the first direction, overlap with the second zones, which are arranged above the first lens in the second direction. The lens is designed to be displaceable and / or rotatable parallel to the first image plane. Furthermore, this refraction determining optic, in addition to the one lens, may comprise another lens having a constant mean effect, which is arranged relative to the one lens so that the observer has a target through the further lens and the one lens having a varying mean effect has a changing cyner effect, can observe.

An embodiment variant of the invention consists in that the first imager is interchangeably arranged in the first image plane. As an image generator, e.g. a smartphone can be used. This variant is characterized by its comparatively simple mechanical construction and cost-effective manufacturability.

In a further embodiment of the invention, a second variably formed imaging optics can be attached to the holding device, which is designed to image the image generated in the first image plane or an image generated by a second imager in a second image plane such that the user im can perceive the head attached state of the holding device with the second eye.

An alternative further embodiment of this further embodiment of the invention provides that the holding device carries a second refractive determination optics, which is formed in the mounted on the head state of the holding device for determining the subjective refraction of the second eye. While it is therefore possible in principle to run the display device according to the invention monocular, the further embodiment and the alternative are further

Embodiment Examples of binocular or stereoscopic variants. Consequently, the observer can simultaneously be shown the visual impression for both eyes which he would have with his new spectacles.

In this case, it is favorable if the first imaging optics and the second imaging optics are designed to be complementary to one another and / or if the first refractive aberration optics and the second refraction determination optics are formed complementary to one another. Complementary training is to be understood in the context of the present invention, a symmetry in functional terms. The first and second imaging optics, on the one hand, and the first and second refraction-determining optics, on the other hand, are intended to be functionally identical, but they should be separately operable for the right and left eyes. Since the right and left eyes of a user are not formed on their own, either functionally or constructively symmetrically, consider e.g. to the convergence movement of the eyes, when looking in the vicinity, the corresponding image and / or

Refractive optics for the right and left eye should not be identical. A symmetrical design to a centrally located between the two corresponding optics for the right and left eye level is desirable.

With the aid of the first imager, the user can be separated during the demonstration of the optical properties of spectacle lenses for the right and left eye

Test image impressions are presented. Due to the use of the two eyes separately assigned imaging optics, the display device acts as a

Stereo slide viewer.

An embodiment variant of the display device according to the invention provides that on the holding device, an orientation sensor for determining the orientation of the

Holding device is mounted. Alternatively or additionally, a motion sensor for determining the movement of the holding device may be attached to the holding device.

Finally, additionally or alternatively, an inclination sensor for determining the inclination of the holding device can be attached to the holding device. With the help of

Orientation, movement and / or inclination sensors, the head position and / or movement of the head of the user can be determined. This information may be for the change the content of the virtual image may be used by changing the content of the image in the first image plane and / or changing the state of the first / second imaging optics and / or changing the state of the first / second refractive optics. Variations in this regard will be described in more detail below. These measures are all for

Demonstration of the optical properties of real glasses that are not yet in existence for the user. In particular, the virtual image content can be changed so that the two-eyed visual impression of the user is best demonstrated with the spectacle lens to be demonstrated, including the movements of the head. The display device may in a particularly advantageous embodiment of the invention, a simulation device for simulating the effect of a view of the first eye of the user by a spectacle lens to be demonstrated for the first eye and outputting the simulation of the effect of the first user's eye through the to

having spectacle lens for the first eye in the form of the one image in the first image plane by the first imager. Alternatively or additionally, a

Simulation device for simulating the effect of a glance of the second eye of the

User through a lens to be demonstrated for the second eye and to output the simulation of the effect of the eye of the user's second eye through the

demonstrating spectacle lens for the second eye in the form of a picture in the first

Image plane may be provided by the first imager or in the form of the one image in the second image plane by the second imager. The two simulation devices can also be part of a single device.

In particular, one or both of the simulation devices can be realized in the form of a computer on which software is operated in order to carry out the described functionalities. This computer can be used as a separate unit to those previously described

Components or components of the display device to be carried out by the

Holding device is held. However, the computer may also be the processor or the central processing unit of the above-described smartphone, on which an application program or an application software (so-called mobile app) runs, which carries out the simulation described above. In this case, the smartphone not only provides the first imager in the form of its screen, but also the simulation device (s) for computationally generating an image for one or both eyes or two separate images for each eye separately, which or which impresses the visual impression through a corresponding spectacle lens or represent or represent glasses with two lenses. In other words, the app computes test image impressions mathematically, simulating the effect of the user's gaze through a pair of glasses to be demonstrated with spectacle lenses to be demonstrated. In this mathematical simulation, that test image is presented which gives the user the best possible visual impression, taking into account the spectacle lenses attached to the stereo image viewer to remedy the refraction deficit, which would actually result in the spectacle lens also being used in the simulation

intended position in front of his eyes carry. The test image displayed on the first imager and possibly on the second imager, or the test images displayed on the first imager and possibly on the second imager, may e.g. illustrate the distortion of the eye-lens system. It is possible that the test image or test images demonstrate the blurring of individual lines of sight produced by the astigmatism of slanting bundles through a progressive lens (one eye) or two progressive lenses (two eyes). It is also possible that the test image (s) are the vertical prismatic side effects of the two eyes

Show directions of progressive lenses. Furthermore, it is possible for the test image or images to illustrate the effect of a polarizing spectacle lens in various situations of use. Finally, it is possible to display on the test images or the darkening and brightening behavior of photochromic lenses in different situations of use. Furthermore, the test image or the test images can the effect of a spectacle lens or glasses in different light conditions and / or in different

Reproduce situations of use. Furthermore, the influence of different

Spectacle lens materials and / or coatings of the spectacle lens are demonstrated. In all the above-described possibilities of simulating and generating test images, the size and shape of the respective spectacle lens as well as the influence of size and shape of the near part, remote part, possibly intermediate part and possibly progression channel on the imaging properties of multifocal lenses can be taken into account. It is also possible to shift the test images for the right and left eyes against each other, so as to demonstrate the effect of prismatic lenses. If necessary, the test images for the right and left eye can also be scaled by software in order to demonstrate the effect of the self-magnification of spectacle lenses. It is also possible to consider the pupil distance when creating the test images. For example, a default setting made by the consulting service provider can be used for this purpose. A further very advantageous embodiment variant of the invention provides that the simulation device is designed to simulate the effect of a glance of the first eye, the orientation determined by the orientation sensor and / or the movement determined by the motion sensor and / or that determined by the inclination sensor

Tilt in the simulation of the effect of the eye of the first eye of the user by the spectacle lens to be demonstrated for the first eye into account. Alternatively or additionally, the simulation device, which is designed to simulate the effect of a glance of the second eye, may determine the orientation determined by the orientation sensor and / or the movement determined by the movement sensor and / or that determined by the inclination sensor

Consider tilt in simulating the effect of the second user's eye's gaze through the second eye's lens to be demonstrated. In other words, the orientation, movement and / or inclination sensors are intended to determine the current head position and / or the momentary movement of the user's head and to move the test images on the basis of this information such that the binocular visual impression of the patient

Systems eyeglass lens including the determined by a so-called head tracker movements of the head is best demonstrated.

The first imaging optics and possibly the second imaging optics can be designed to be manually changeable. In particular, e.g. a user-operable Drehmimik be provided to move the respective imaging optics or a lens of the respective imaging optics in the direction perpendicular to the first image plane. It can also be provided a user-operable Drehmimik to move the respective imaging optics parallel to the first image plane or twist. The respective displacement can also be realized by means of a user-operable slide. Also the one described above

Tilting of the respective imaging optics or a lens of the respective imaging optics with respect to the orientation of the holding device can be embodied as a mechanically operable mimic. It may be advantageous to perform the facial expressions for the respective imaging optics not mechanically operable, but automatically operable. Such a variant therefore provides an automatic changing device for changing the first imaging optics, which is attached to the holding device. Alternatively or additionally, an automatic

Verm ^ denmgseinrichtung be provided for changing the second imaging optics, the the holding device is attached. The operation can then take place, for example, via an input field or an input button or the like of the computer, which generates the test image (with or without a simulation function of the effect of the look of an eye through a spectacle lens). It is also possible for an operating element, for example in the form of a button, wheel, joystick or the like, to be provided, which activates the changing device. The change made by the automatic changing device of the first and possibly the second imaging optics can be designed to work under the influence of software. In particular, the first and possibly the second imaging optics can be designed to be focusable under the influence of software, thereby causing an accommodation effort for the user.

It may also be advantageous to make one or both refractive optics automatically operable. In particular, it can be provided to carry out the measuring lenses automatically replaceable or replaceable. The toric or cylindrical

Measuring lenses can be made automatically rotatable. It is also possible to use the equipment used instead of the spectacle lenses with the lens with the different

cylindrical zones and possibly the second spherical lens to perform automatically controlled. As an alternative or in addition, a manual control unit may be provided, which may be e.g. is operated by a service provider advising the user of the display device and which is set up to change the first and possibly the second imaging optics as described above. A particularly advantageous embodiment of a display device according to the invention with automatic changing device provides that the automatic

Modification device for changing the first imaging optics is formed, the first imaging optics on the basis of the above-mentioned orientation sensor

Orientation and / or change based on the motion determined by the above movement sensor and / or on the basis of the inclination of the above-described inclination sensor. Alternatively or additionally, the automatic

Change means for changing the second imaging optics may be formed, the second imaging optics based on the orientation of the orientation sensor and / or based on the motion determined by the motion sensor and / or on the inclination of the tilt sensor.

A further Ausfllhrungsungsvariante of the display device according to the invention is that on the holding device, a first Blitlalchtimgsbestimmungseinrichtung is mounted to determine the direction of the gaze of the first eye. Alternatively or additionally, a second viewing direction determination device can be provided on the holding device in order to determine the direction of the gaze of the second eye. The respective particular viewing directions can also be included in the simulation calculation of the respective simulation devices and / or the automatic modification of the respective imaging optics by the modification device. Known from the prior art

Viewing devices are e.g. so-called eye trackers, which determine the pupil center and the pivot point of the eye and derive a momentary line of sight. In particular, to simulate the effect of a glance of the first eye, the simulation device may be designed to take into account the direction of the first eye's gaze determined by the first direction-determining device in the simulation.

Alternatively or additionally, the simulation device may be configured to simulate the effect of a glance of the second eye, the direction of the view of the second eye determined by the second sighting direction determination device during the simulation

consider.

A further embodiment of the invention is characterized in that

the automatic altering device is designed to change the first imaging optics, to change the first imaging optics on the basis of the direction of the first eye's view determined by the first sight direction determination device. Alternatively or additionally, the automatic changing means for changing the second

Imaging optics may be configured to change the second imaging optics based on the direction of the gaze of the second eye determined by the second gaze direction determining device. A combination of these variants makes it possible to use the

Focusing state of the first and second imaging optics from the respective ones

To determine the directions of both eyes. In a further embodiment variant of the display device according to the invention, the holding device carries a first camera, which is controlled by the viewing direction of the first eye and has an optical axis. The optical axis is a term from geometric optics. The straight line that coincides with the symmetry axis of a reflective or refractive optical element or optical system is called an optical axis. In a lens system, the optical axis is the line formed by the optical axis of the individual elements. The first camera is controlled in such a way that the optical axis of this first camera and an optical axis extending in the direction of the first eye through the pupil center of the first eye coincide. The holding device carries a first distance sensor which is arranged such that the first distance sensor detects a distance to an object recorded by the first camera in the form of a camera image. The simulation device for simulating the effect of a view of the first eye of the user by a to

demonstrating spectacle lens for the first eye is configured to simulate the image generated in the first image plane by the first imager from the camera image captured by the first camera and the distance detected by the first distance sensor. Alternatively or additionally, the holding device can carry a second camera, controlled in such a way from the viewing direction of the second eye, with an optical axis such that the optical axis of the second

Camera and coincide in the direction of the second eye through the pupil center of the second eye extending optical axis. The holding device furthermore carries a second distance sensor, which is arranged such that the second distance sensor detects a distance to an object recorded by the second camera in the form of a camera image. The simulation device for simulating the effect of a glance of the second eye of the user by a spectacle lens to be demonstrated for the second eye is set up, from the camera image taken by the second camera and that from the second camera

Distance sensor detected distance to simulate the image generated in the first image plane of the imager and / or the image generated in the second image plane by the second imager.

In other words, the invention optionally provides for one eye each a preferably short-focal-length camera with a view towards the front with respect to the head position of the wearer, which allows the camera image recorded with it to be modified so that it corresponds to the camera View through a pair of glasses with the spectacle lenses to be demonstrated. In the case of the use of two cameras for each eye, these are preferably arranged at a common eye distance from one another in order to faithfully reproduce the stereoscopic effect. In particular, their respectively recorded camera images are to be changed so arithmetically that each image corresponds to the view through the associated spectacle lens of the spectacles with the spectacle lenses to be demonstrated

In a particular embodiment of the invention, the distance of the point targeted by the user in the image plane is determined by stereoscopic evaluation of the two camera images and the focusing devices of the imaging optics are deflected so that the required for the targeted direction accommodation effort for the subject necessary is to accommodate the corresponding point in the test images taking into account the spectacle lens to be demonstrated. The invention further comprises a system with a display device of the type described above and a manual control device for automatically controlling the first and possibly the second refraction determining optics and / or for automatically controlling the first and possibly the second imaging optics and / or for driving the simulation device (s).

The user of the display device may e.g. get the manual control device, which acts by radio or electromagnetic signals on the display device so he

Feedback to the procedure gives. The feedback may be binary (e.g., push-button). Scalar feedback may also be provided (e.g., knob positions, joystick deflections, trackball positions).

The scalar responses may be e.g. be used so that the user thereby acts on the focusable imaging optics (s) or refraction determination device (s), in particular the cylindrical or toric lenses, to determine a subjective optimum.

With the help of the manual operating device, it may be possible, using software, to exchange the type of simulated spectacle lenses in the short term, so that the user can

Can experience usage characteristics of different species in comparison. As an alternative to the user of the display device itself, a service provider advising the user on the selection of glasses may also influence the hardware and software components of the display device by means of a handheld device acting electrically or by radio or a comparable method such as WLAN, Bluetooth or the like. to select the respective situations of use to be simulated.

Instead of a display device with an imager held by its holding device, the invention provides a system which can be placed on the head of a user

Holding device further includes a fixed to the holding device first imaging optics, which is adapted to image a generated in a first image plane from a first imager image so that the user can perceive in the upside down state of the holding device with a first eye, wherein the holding device is a first

Refractive optics wearing in the upside down state of the

Holding device for determining the subjective refraction of the first eye is formed and / or that the first imaging optics is formed changeable. Notwithstanding the display device described above, the imager is not held by the holding device, but is arranged in space. The other features described above in connection with the design variants of the display device can also be realized in an advantageous manner in the variant embodiments of the system.

A particularly advantageous embodiment of the system is that at the

Holding device is also attached a second changeable trained imaging optics to image the image generated in the first image plane so that it can perceive the user in the attached state of the holding device with the second eye and / or that the holding device carries a second refractive determination optics in the patch Condition of the holding device is designed for determining the subjective refraction of the second eye. In this variant, it is favorable if an image separation system is provided in order to supply first image contents of the image generated in the image plane exclusively to the first eye and second image contents deviating from the first image contents exclusively to the second eye. The invention will be explained in more detail by way of example with reference to the accompanying drawings, which also disclose characteristics essential to the invention. Show it:

Fig. 1 is a perspective view of a first embodiment of

display device according to the invention;

Fig. 2 is a plan view of the embodiment of Fig. 1;

Fig. 3 is a plan view of the arranged in the display device 1

Imager;

Fig. 4 is a plan view of the imager of FIG. 3 for explaining the division of

Screen in two sections and showing the same pictures on both sections;

5 shows a schematic representation of an overall system according to the invention comprising a display device in the first embodiment according to FIG. 1 with a screen divided into sections, imaging optics and interchangeable measuring lens glasses and user;

Fig. 6 shows the schematic representation of FIG. 5 supplemented by double arrows for

Illustration of the shift and scaling of the right and left eye fields displayed on the screen of the imager;

Fig. 7 is a corresponding to FIG. 5 schematic representation of an inventive

Overall system consisting of a display device in a second

Embodiment with movable imaging optics and a user;

Fig. 8 is a schematic representation corresponding to FIG. 5 of an inventive

Overall system consisting of a display device in a third

Ausführungungsforrn with mutually rotatable measuring lenses and a

User;

Fig. 9 is a schematic representation corresponding to FIG. 5 of an inventive

Overall system consisting of a display device in a fourth

Embodiment with additional front cameras and a user.

In Fig. 1, a first embodiment of the display device 1 according to the invention is shown schematically in a perspective view. The display device 1 comprises a substantially box-shaped front part 2 with an open side 3. All other sides 3a, 3b, 3c, 3d, 3e of the front part 2 are at least substantially closed. The contour of the open side 3 is designed to fit the head of a user can be applied, that the user can wear the display device 1 like glasses on his head. For this purpose, the contour on the one hand a nose pad 4 and at the two lateral ends of the front part 2, a tether 5 is attached. The tether 5 is when wearing the

Display device 1 according to the invention is guided around the head of the user, so that the desired contact pressure is present in order to be able to carry the display device 1 ergonomically and preferably light-tight on the head. The tether S can, for. B. may be formed as an elastic band and / or as a band with adjustable length. The front part 2 forms together with the tether 5 a can be placed on the head of the user holding device. The display device 1 according to the invention comprises a first imaging optics 6 with an optical axis O A6 for a left eye LA of the user and a second imaging optics 7 with an optical axis OA7 for a right eye RA of the user, in each case one image generated in an image plane E magnify that the user can perceive it. This is best seen in Fig. 2, which shows a schematic horizontal cross section of

Display device 1 according to the invention.

In addition to the imaging optics 6, 7, the display device 1 according to the invention has a first refractive determination optics 9 in the form of a measuring spectacle lens, which is formed in the upside down state of the holding device 2 for determining the subjective refraction of the left eye LA. Furthermore, a second designed as a measuring spectacle lens

Refraction determination optics 10 for determining the subjective refraction of the right eye RA provided. The measuring spectacle lenses 9, 10 are interchangeable by means of corresponding holders 11, 12 via openings 13, 14 in the front part 2, which is illustrated by the two double arrows 15, 16 in Figs. 1 and 2.

The front part 2 is substantially closed except for the side 3. In one embodiment, these sides 3a, 3b, 3c, 3d, 3e apart from the openings 13, 14 completely closed, which causes a partitioning of light from the outside. In another embodiment, which is shown in FIG. 1, additional ventilation slots 8 and / or ventilation holes are introduced in these sides 3a, 3b, 3c, 3d, 3e, which are particularly preferably designed so that the material passing through them from the outside Light is minimized.

Since the front part 2 is formed substantially closed except for the page 3, the user, when he carries the display device 1 intended on the head, only the in the image plane E generated images and no longer perceive the environment.

For image generation, the display device 1 according to the invention may comprise a portable imager in the form of a smartphone 21, shown by way of example in FIG. 3, having a screen 22 arranged in the display device 1 such that the screen 22 of the portable imager 21 lies in the image plane E. , In Fig. 2, only the screen 22 is shown schematically for simplicity of illustration and in Fig. 1, only the image plane E and not the entire imager 21 is shown to simplify the illustration. For quick replacement of the imager 21, a holder is provided, consisting of a frame with a frame bottom (not shown). In the frame bottom, a recess is provided, which is opposite to a rear camera of the portable imager 21. The frame can be inserted laterally into a receptacle which is provided in the front part 2. In the recording, two suspension elements are present, which engage detent engagement of the frame, so that when inserting the frame in the recording conveys the correct fit of the frame in the recording and the frame is fixed interchangeable in this position. Alternatively, two small permanent magnets or magnetizable metal discs are provided for this purpose in the recording on the top and bottom and at the corresponding positions of the frame. The front surface finish of the front part 2 is formed by a partially transparent plastic disc. The disk is partially reflective coated, so that from the outside of the inserted imager 21 is not or hardly recognizable, but a rear-side camera of the imager 21 can look outward.

The smartphone 21 shown by way of example in FIG. 3 has a screen which acts as an image generator; 22, a control unit 23 and connected to the control unit 23 via a control line 25 sensor unit 24 for detecting a movement of the smartphone 21 on. Other necessary for the operation of the smartphone 21 elements are not shown. The control unit 23 and the sensor unit 24 are shown in dashed lines, since they are installed in the smartphone 21 and are usually not visible from the outside.

The control unit 23 can execute program instructions and serves to control the screen 22.

The sensor unit 24 may include an inertial sensor, such as a 1-axis, 2-axis or 3-axis Have 15 axis gyroscope, a tilt sensor, an acceleration sensor and / or another sensor with which a detection of a movement of the smartphone 21 is possible. The sensor unit 24 generates corresponding measurement signals, which are transmitted to the control unit 23 (preferably continuously), as shown schematically by the dashed connecting line 25 in FIG. 3.

As can be seen from the illustration in FIG. 2, each of the two imaging optics 6, 7 forms only a partial area of the screen 22. In order for a user wearing the display device 1 to be able to perceive an object to be displayed with both eyes LA, RA, this must thus be generated in the associated partial areas of the screen 22, which are imaged by the two imaging optics 6 and 7. For this purpose, an application or a program is provided on the smartphone 21, which is executed by the control unit 23 and controls the screen 22 so that based on supplied image data for the object to be displayed or for a first image to be displayed, the object or the first Figure 33 with schematically illustrated picture elements 33 ₁ , 33 ₂ and 33 ₃ both on a first section

34 of the screen 22 as well as on a second section separated from the first section 34

35 of the screen is generated, as shown in Fig. 4.

Since the application is carried out on the smartphone 21 itself, image data stored on the smartphone 21 or image data supplied to the smartphone 21 (eg streamed image data, preferably via a suitable wireless connection) can be advantageously used to display the images in the two sections 34 and 35. In particular, image data originating from other applications running on the smartphone 21 can be processed by the application according to the invention such that the same image is always displayed in both sections 34 and 35.

The two sections 34 and 35 may be chosen so that they directly adjoin one another. Alternatively, it is possible that they are spaced from each other. The distance range can in particular be displayed or activated as a dark switched range. The

Application can represent the images 33 in the two sections 34, 35 that for the

User no stereo effect is present. However, it is also possible to create a stereo effect. The basic structure of the overall system display device 1 with the divided into the sections 34 and 35 screen 22, the two imaging optics 6, 7 and the interchangeable measuring lenses 9 ₁ 9 ₂ , 10 _1, 10 ₂ and stereo image viewer 17 takes one of FIG .. 5 Further functionalities of the smartphone 21 and / or the display device 1, in particular their operation, are described in DE 102014 107 938 A1 and in DE 10 2014 017 534 A1.

The measuring lenses 9 ₁ , 9 ₂ , 10 ₁ , 10 ₂ are constructed similar to those of the so-called

Precision measuring glasses from ZEISS. The task of the measuring lenses 9, 10 is the,

Stereo image viewer 17 for the smartphone screen 22 to adjust so that the user can see pixels that seemingly at infinity, see, i. that be

Refraction deficit (expressed eg in sphere, cylinder and its axial position) is thereby compensated. The measuring lenses 9 ₁ , 9 ₂ , 10 ₁ , 10 ₂ are spherical, toric or cylindrical Einstärkenlinsen with a relatively small diameter, which are relatively close to the eye LA, RA arranged and therefore still grant a sufficiently large field of view. With the measuring lenses 9 _1; 9 ₂ , 10 ₁ , 10 ₂ the user 17 is demonstrated the correction of his new glasses. Alternatively or additionally, the spherical component can also be caused by a deliberate defocusing of the imaging pots of the stereo image observer by changing the position in the direction of its optical axis.

Using a software that runs on the smartphone 21 itself and / or an additional part of the software on a wired, optical fiber or wireless technology with the

Smartphone 21 connected computer (not shown) is running, the user 17 scenes are played according to the invention. The software also takes on the situation and

Orientation sensors 24 of the smartphone 21, so that a head movement of the user 17 results in a change of the image sections shown 34, 35, which are calculated so that the user 17 the image impression is simulated with spectacle lenses to be demonstrated. In particular, the two images 34, 35 are calculated so that they give a stereoscopic impression of the scene to be displayed.

The scene to be displayed can be a real measured one, but it can also be a purely calculated scene. Conveniently, this scene has a depth extension.

Part of the simulated representation can also be the eyeglass detection edge. One could even represent the user 17 himself, including a spectacle frame to be demonstrated, as a component in the scene to be demonstrated. The partial images 34, 35 to be displayed on the screen 21 are always calculated in such a way that they take into account the head pose of the user 17 in the simulated scene. Movement of the head may entail movement of the scene depicted, as if the user 17 were in the scene itself at the imaginary point. In particular, if that too

demonstrating spectacle lens is a multi-intensity lens, even the look through the multi-intensity lens simulated. You can give the user 17 the visual impressions while looking through different

Demonstrate multifocal types of glass: bi- and trifocal glasses, various progressive lens designs, e.g. variously long progression zones, progressive lens types. In the calculation, the blurring by astigmatic side effects of the spectacle lens, which depends on the respective passage point of the visual rays through the respective spectacle lens, simulated by blurred in the simulated scene.

The display device 1 can have one or more devices with which the viewing directions of the two user eyes LA, RA can be determined individually. These

In the simplest case, devices may be cameras 36, 37, which are sensitive in the IR, of which at least one is directed to the associated eye LA, RA per eye LA, RA, as shown in FIG. In addition, it is advantageous to provide an IR illumination 38, the

the space around the eyes LA, RA illuminates infrared. This lighting 38 is invisible to the user 17 and does not bother him. It serves to allow the devices 36, 37 to determine the positions of the eyeballs (so-called eye tracker).

The two simulated partial images 34, 35 are calculated separately, taking into account the detected angles of view of both eyes LA, RA, just as the respective impression was obtained for an eye LA, RA facing in this direction, wherein for each line of sight in the eye positions determined prismatic effects are effective in the presentation, as they would occur even when looking with appropriate eye positions. In this first variant, the fuzziness is also represented by local smearing (e.g., as folding), which would result in erroneous spherical and astigmatic effects for the respective visual rays. In order to make the calculation faster, one can make simplifications which do not impair the demonstration purpose.

By wire, optical fiber or radio, the display device 1 may also be connected to a (not shown here) screen that the optician or in the selection of Eyeglass lenses assistant service provider sees. For example, the displayed scene of the user 17 can be displayed on this screen, with the points in the scene which the user is currently fixing being additionally marked. These layers are determined by the signals of the devices 36, 37 The optician or service provider can thus specifically point out the one or other detail of the scene shown in conversation with the user 17.

An alternative to cameras 36, 37, which measure the positions of both eyeballs, is that inside the display device 1 for the user 17 invisible

Directed light rays on the eyeballs and evaluates their reflexes. The determined

Eyeball positions flow into the calculation of the line of sight and for the

Viewing directions to be shown scene details: These are in particular: the prismatic deflection by the respective visual line and the blurred by the astigmatism.

The prismatic deflections, in conjunction with a copying movement and simultaneous eye movement that compensates for head movement, cause the head to move

Reality straight lines for the progressive lens wearer appear dynamically bent (so-called "rocking effect") .The size and exact type depends on the

Spectacle lens effect, in particular of the addition and the progression length of a

Multi-intensity glass from. By prolonged wearing you get used to it and you perceive the effect less strong or no longer true. The adaptation speed of the user is individualized and with the display device according to the invention an optician or service provider using the display device for the demonstration of spectacle lenses can determine whether a user is likely to tolerate a particular type of progressive lens. About an additional control device (not shown), in particular a hand-held device, such as a smartphone or a tablet, which is also connected with wire, optical fiber or wireless technology with the smartphone 21 or the aforementioned computer, the optician can simulate the Swap eyeglasses abruptly, so to speak. With the display device 1 according to the invention according to this embodiment, it is possible to check the compatibility of the compensation of vertical prismatic side effects in the case of progressive lenses for lateral viewing directions, in particular in the lower region and especially in the outer region. These side effects are individually perceived differently disturbing. Of the demonstrating opticians or service providers show the user 17 very different designs and ask him how he cope with the visual impression in the chosen scene.

At the press of a button, the optician or service provider can also replace the scene, e.g. from a scene in a closed room to an outdoor scene in the light, in a stairway or in the car. The user can in this way a progressive lens

which does not physically exist, but which is adjusted to its refactoring values. With the means of the display device 1 described in the first exemplary embodiment, prismatic prescriptions can also be demonstrated. For this purpose, the two partial images 34, 35 must be shifted from one another by correctly calculated distances and directions, as indicated by the double arrows 41, 42, 43, 44 shown in FIG. In certain spectacle wearers 17, the images 34, 35 of the right and left eyes RA, LA do not appear in the same size (aniseikonia). These users 17 have difficulty merging both images 34, 35. To some extent, this effect can be achieved by appropriate

Improve self-magnification of the lenses. By software you can represent the right and left part of the image 34, 35 slightly different magnified (see double arrows 45, 46, 47, 48) and so determine whether the user 17 benefits from it, if by the special choice of the lenses size the two images 34, 35 specifically influenced in the real glasses to be produced, for example, by different refractive indices of the lenses. Anisometropia larger than 2 dpt. When wearing the glasses, you may experience problems that can be alleviated with the help of a "slab-off" cut. The optician may thus demonstrate to the user 17 the benefits of such a procedure without having such a pair of lenses specifically with the refractive and usage data of the user 17 at hand and grinding them into a socket. Since in the imaginary situation the user 17 can also be looked at in a mirror in the virtual scene, he could see there what he looks like with the recommended spectacle frame and these spectacle lenses. With the display device 1, the user 17 can be shown the view through a polarizing spectacle lens in a virtual scene. Conveniently, a scene contains many approximately horizontal reflective surfaces whose reflection is reduced by software, eg wet roads with or without oncoming cars in the sunshine or scenes on the water. The display device 1 can also be used to demonstrate to the user 17 the view through a photochromic lens in a virtual scene. Conveniently, a scene for this demonstration purpose contains many different lighting conditions, such as representation in a car including driving through a tunnel, sitting in a cafe, etc.

The display device 1 can also be used to demonstrate to the user 17 virtual scenes with different lighting conditions. For this purpose, the user 17 expediently also receives an operator device (not shown) which allows to set discrete or continuous variables, e.g. the degree of darkening of sunglasses of e.g. 10% to 90% transmittance. For this purpose he can operate, for example, a slider or a joystick or a knob. Discrete switching functions are used e.g. suitable for fast switching between different scenes or different demonstration objects.

By means of a user mark 17 on his operating device (eg by joystick or slider, so continuous controls) influenceable sight mark in the virtual scene you can calibrate the device according to the invention: During the calibration, the user 17 thus affects, for example, the location of visual marks in the virtual scene, which he subjectively brings to cover. These are sight marks, which can also be shown in front of a solid background and which he should bring to cover there. From the location of the visual marks and those obtained with the facilities 36, 37

Eye movements, the software computes the location of the eye pivot point in the device coordinate system and the pupil distance of the user (calibration).

FIG. 7 shows a schematic illustration corresponding to FIG. 5 of an overall system according to the invention consisting of a display device 1 in a second

Embodiment with variable imaging optics 6, 7, which are designed in the form of displaceable focusable stereo-solenoids. The components of the overall system according to FIG. 7 basically correspond to the components of the overall system according to FIGS. 5 and 6. Therefore, the same reference numerals apply.

In this embodiment, the imaging optics 6, 7 of the stereo image viewer 1 are arranged to be movable under software control along their optical axes OA6, OA7 (FIG. 8) 27

see. Directional arrows 51, 52). By this controlled movement, an accommodation stimulus for the user 17 can be effected, so that the user 17 must accommodate with his eyes LA, RA when looking at points in the display 22, which are closer to the viewer 17 in the room shown. The position of the lenses 6, 7 is respectively - depending on the

Viewing direction of the respective eye LA, RA- for each eye LA, RA independently of the other eye LA, RA set so that the user 17 the full or a set part of the required for the removal of the fixed point in the virtual scene point

Accommodate accommodation costs itself, as the user 17 must accommodate even with a progressive lens depending on their addition and viewing direction and removal of the fixed details.

A progressive lens does not always equal the whole accommodation effort of the

Eyeglass lens wearer (user 17) by the Nahzusatzwirkung, but only a part. Because the aberrations - especially in the lateral areas - strongly depend on the addition and the progression length of the lens, one provides a progressive lens only with the Nahzusatz that the eyeglass lens for his viewing and use habits really needed. It depends on the accommodation capacity of the spectacle lens wearer whether he can see all the objects located there in the distance ranges of a represented scene sharply: If its accommodation power together with the addition effect of the

Eyeglass lens is insufficient, the lens carrier can not see sharp at certain distances. The usability range forward or backward is e.g. limited by the combination of the spectacle lens with the accommodation capacity of the spectacle lens wearer. However, if the accommodating power of the spectacle lens wearer is maintained for viewing directions in which objects are usually located in the vicinity, despite the residual accommodation capacity of e.g. 1 dpt completely compensated by a progressive lens, then you think the glasses lens u. U. in the lateral areas next to unnecessarily large astigmatism. The prismatic effects become larger with increasing addition - especially disturb the different vertical components between the left and the right eye. This test determines the reasonable adjunctive effect for the user 17 by a close-to-reality practical experiment, without the need for a corresponding pair of glasses designed for the individual data of the user 17.

Introduced in the second exemplary embodiment, electronically controlled focusing of the imaging optics 6, 7, which depends dynamically on the respective viewing directions, allows a clearly beyond the first embodiment simulation of the multi-intensity spectacles, especially a progressive lens. The benefit of the invention is that you can demonstrate the effect of progressive lens variations very realistic and vivid. Since the focusing of the imaging optics 6, 7 can simulate a part of the spherical recipe component (which in the first exemplary embodiment is predefined exclusively by the measuring spectacle lenses 9 ₁ , 9 ₂ , 10 i, 10 ₂ ), the correction of the spherical one can be carried out

Part of the recipe completely or partially relocate to the dynamic adjustability of the imaging optics 6, 7. This reduces the number of spherical spectacle lenses to be held and also facilitates adaptation to the individual conditions of the individual user 17.

A third embodiment sketched in FIG. 8 builds on the second embodiment sketched in FIG. 7 and also replaces the cylindrical one

Measuring lenses 9 _1, 10i of FIG. 7 is separated by two electrically from each other about a common axis OA9, OA10 rotatable (see. The direction of arrows 53, 54, 55, 56) toric or cylindrical lenses 9 _3, 9 _4, 10 _3, 10 ₄ . The combination of two such lenses 9 ₃ , 9 ₄ , 10 ₃ , 10 ₄ results in the optical effect of a lens with adjustable astigmatism. The size of the Zylmderwirkung depends on the mutual angle of rotation of these two lenses 9 ₃ , 9 ₄ , 103, 104 from. In addition to the cylindrical effect also occurs a resulting spherical component. If both lenses have equal astigmatism and they are sufficiently close together, then the resulting cylindrical value may be twice the size of each such lens 9 ₃ , 9 ₄ , 10 ₃ , 10 ₄ . That is the case when the

Cylinder axes of both lenses 9 ₃ , 9 ₄ , 10 ₃ , 10 _{4 are} parallel. The axis position of the resulting cylinder is the same. On the other hand, if the two cylinder axes are rotated by 90 ° relative to one another, then both lenses 9 ₃ , 9 ₄ , 10 ₃ , 10 ₄ together only produce a spherical effect. This effect must be considered in the control (directional arrows 51, 52) of the imaging optics 6, 7, so that the resulting spherical effect of all these optical elements 6, 7, 9 ₃ , 9 ₄ , 10 ₃ , 10 ₄ is as it is is just necessary for the simulation.

In all other mutual rotational positions arises both a spherical, as well as a cylindrical portion which is between the simple and the double cylinder value of the individual lens 9 ₃ , 9 ₄ , 10 ₃ , 10 ₄ . The resulting axis is the bisecting line between the axes of the cylindrical lenses. If one for both lenses 9 ₃ , 9 ₄ , 10 ₃ , 10 ₄ the appropriate By adjusting the angle of rotation of each other, by turning both lenses 9 ₃ , 9 ₄ , 10 ₃ , 10 ₄ together by the same angle, they can be adjusted so that the axial position of the resulting cylinder is the one that is desired to be adjusted. The electronic control of the position of the imaging optics 6, 7 and the lenses 9 ₃ , 9 ₄ , 10 ₃ , 10 ₄ is now done under software control so that exactly the spherical and astigmatic effect results for the detected line of sight, there to be demonstrated spectacle lens having. The exact control is done in such a way that it also takes into account the imperfections of the stereo viewing loupes 6, 7 for this viewing direction, so that the observer 17 receives precisely the optical stimuli for the respectively fixed points, which he would also experience with real glasses (spherical , cylindrical incl. axis position, prismatic effects). In this case, the representation of the virtual scenes is easier, because the blurred by the astigmatism slated viewing directions (strong strong lenses or strong

bent sports glasses), by Restastigmatismen looking through

Progressive lens to the right and left of the near area, etc. arise for the user 17 then automatically by the optics 6, 7, 9 ₃ , 9 ₄ , 10 ₃ , 10 _{4 of} the display device. 1

Instead of two mutually rotatable lenses, it is also possible to use two Alvarez lenses, which can be displaced relative to one another in two coordinates, with which one can also set each astigmatism / axis combination in a certain range of design.

The mimic of rotatable toric or cylindrical lenses or of mutually displaceable lenses is known from Phoroptern. What is new is that these means are adjusted dynamically depending on the direction of both eyes in such a way that they simulate the effect of a pair of spectacles.

Unlike in the previous example, you also need that part of the

Blurred not separately calculated in the scene images for the two eyes and

represented by the gaze-directional spherical mismatch:

If the position of all optical components 6, 7, 9 ₃ , 9 ₄ , 10 ₃ , 10 _{4 is} exactly the same as the spherical mismatch of the spectacle lens to be simulated, then the user 17 also experiences the same.

Also, the astigmatic mismatch for the central visual steel of the eye LA, RA can be achieved by targeted (De) -focusing (imaging optics 6, 7) and the positions of the cylindrical lenses 9 ₁ , 9 ₄ , ΙΟ ₃ , 10 _{4 in} each case from the data of the spectacle lenses to be simulated and

Calculate and set eyeball positions: For the "middle beam" (along OA9, and OA10), user 17 sees what he would also see with the lens (however, spherical and astigmatic errors, coma, etc. can not be simulated in this way ).

With a display device 1 designed in this way, an optician or service provider can demonstrate to a user 17 all aspects of various progressive lenses. He can show him on his control panel brands, the user should fix 17, ask him to compare his impression there with that of another eyeglass lens realization. The control programs of the display device 1 can also play a task program for the user 17, measure the time to feedback from the user 17 via its control panel and so an objectified measure on the performance of the user 17, each with several

Determine progressive power variants. In this way, one avoids the selection of subjectively less suitable progressive lenses, because it is possible with the display device 1, durchzuspielen several eyeglass lens supply variants with different parameters, without actually making all these solutions. That does not happen so far because of the high cost and quality of one

Prescription eyewear is absent of the inventive display device 1. The result depends on many random factors, also very much on the level of speech comprehension between the refractive optician and the user 17.

With the solution according to the invention, however, the user 17 can also be played on parameters, e.g. at the optimal Achslage a cylindrical recipe portion by adjusting the subjectively optimal Achslage on his keypad and then checked in an objective playful test step in which the user must fulfill certain tasks 17 on the basis of his reaction times, if he really sharp looks.

A fourth exemplary embodiment outlined in FIG. 9 builds on the third and contains one or more additional front cameras 61, 62 which look forward from the display device 1. The images of these front cameras 61, 62 are fed to a computer, which calculates the distances of related points from the views. So that can be with the

Display device 1 are also the real scene around the user 17 itself, by taking from the calculated images 34, 35 with their depth graduation calculates stereoscopic views as distorted as the real scene when viewed with the spectacle lens to be demonstrated.

For example, with this embodiment, the demonstrating optician could give the user 17 a read sample. By the cameras 61, 62 and the device (7, 7 ') for determining the eyeball positions can then be measured objectively, in which

Viewing distances the user 17 holds the reading sample. The optician may ask him to read the reading sample, measure his reading speed, determine the visual saccades, etc. In the real reading sample, e.g. arithmetically, the sample text can be enlarged or reduced in stages, etc., thus optimizing the adaptation of the glasses for visual tasks in the user-specific situations of use by choosing differently designed progressive lens designs.

Instead of moving along with the head of the subject screen, you can also take a fixed in space projection screen, which allows the right and left image separated

from one another, e.g. a 3 D TV screen. The device that has to be moved with the user's head thus becomes lighter and smaller.

In front of the two imaging optics 6, 7, the elements for image separation are then applied, so that the left eye sees only the calculated scene, which is intended for the left eye, and the right eye, that for the right eye, e.g. a shutter, which alternately gives a view of the left and the right image.

One can also solve the image separation with polarizing filters, e.g. left channel with left circularly polarized lenses and right channel with right circularly polarizing lenses, etc.

In front of the user's eye can also be the ones described above

Viewing direction sensors are located, with which the system determines the viewing directions of the individual pupils, and the electronically controlled optical components, which on the one hand compensate for the individual refraction data, on the other hand through targeted focusing

Stimulate accommodation stimuli, as the spectacle wearer in the virtual

represented scene as a carrier of the spectacle lens to demonstrate, to see the particular fixed details sharp.

Claims

claims:

1. Display device (1) with

a holding device (2) which can be placed on the head of a user,

- A first image generator (22) attached to the holding device (2) for producing an image in a first image plane (E) or a receptacle for receiving the first image generator (22) such that the first image plane (E) in which the image the first imager (22) is generated, with respect to the holding device (2) is arranged in a predetermined position, and

- One on the holding device (2) attached first imaging optics (6), which is adapted to image in a first image plane (E) of the first imager (22) image formed so that the user in the upside down state the holding device (2) with a first eye (LA) can perceive

characterized in that

- The holding device (2) carries a first Refraktiorobestirnmungsoptik (9), which is formed in the upside down state of the holding device (2) for determining the subjective refraction of the first eye (LA) and / or

- The first imaging optics (6) is formed changeable.

2. Display device (1) according to claim 1, characterized in that the first

Characterized in that the first imaging optics (6) has at least one lens (6) that is displaceable perpendicular to the first image plane (E) and / or that the first imaging optics (6) at least one lens (6 ), which is designed parallel to the first image plane (E) displaceable and / or rotatable.

3. Display device (1) according to claim 1 or 2, characterized in that

- The first refraction determining optics (9) comprises a replaceable measuring spectacle lens (9 ₁ , 9 ₂ ) or that

- The first refraction determining optics (9) comprises two against each other about a common optical axis rotatable measuring lenses (9 ₃ , 9 ₄ ) or that

- The first refraction determining optics (9) two mutually displaceable

Includes spectacle lenses in the form of Alvarezlinsen or that

the first refraction-determining optic (9) comprises a lens having a plurality of adjacent first zones arranged across the lens in a first direction, each first zone having a different average effect, wherein a plurality of adjacent second zones overlap first lens in a second direction which is perpendicular to the first direction, each second zone having a different cylinder effect, wherein the first zones, which are arranged over the first lens in the first direction, overlap with the second zones, which are arranged over the first lens in the second direction, wherein the lens is designed parallel to the first image plane (E) displaceable and / or rotatable.

4. Display device (1) according to one of the preceding claims, characterized

in that the first imager (22) is interchangeably arranged in the first image plane (E).

5. Display device (1) according to one of the preceding claims, characterized

characterized in that on the holding device (2) has a second changeable formed

Imaging optics (7) is adapted, which is adapted to image the image generated in the first image plane (E) or an image generated by a second imager in a second image plane such that the user (17) in the upside down state of the

Holding device (2) with the second eye (RA) can perceive and / or that the

Holding device (2) carries a second refraction determining optics (10), which is formed in the upside down state of the holding device (2) for determining the subjective refraction of the second eye (RA).

6. Display device (1) according to claim 5, characterized in that the first

Imaging optics (6) and the second imaging optics (7) are formed complementary to each other and / or that the first refraction determining optics (9) and the second

Refraction determining optics (10) are formed complementary to each other.

7. Display device (1) according to one of the preceding claims, characterized

in that an orientation sensor (24) for determining the orientation of the holding device (2) and / or a motion sensor (24) for determining the movement of the holding device (2) and / or an inclination sensor (24) for determining is provided on the holding device (2) the inclination of the holding device (2) is mounted.

8. Display device (1) according to one of the preceding claims, characterized by - a simulation device (23) for simulating the effect of a glance of the first eye (LA) of the user (17) by a spectacle lens to be demonstrated for the first eye (LA) and for outputting the simulation of the effect of the first eye (LA) of the user (17) through the spectacle lens for the first eye (LA) to be demonstrated in the form of the one image in the first image plane (E) by the first imager (22) and / or by

a simulation device (23) for simulating the effect of a glance of the second eye (RA) of the user (17) through a spectacle lens for the right eye (RA) to be demonstrated and for outputting the simulation of the effect of the second eye (RA) of

User (17) through the spectacle lens for the second eye (RA) to be demonstrated in the form of the one image in the first image plane (E) by the first imager (9) or in the form of one image in the second image plane by the second imager.

9. Display device (1) according to claim 8 dependent on claim 7, characterized

marked that

- the simulatory device (23) is designed to simulate the effect of a first-eye view (LA), the orientation determined by the orientation sensor (24) and / or the movement determined by the motion sensor (24) and / or that of the inclination sensor ( 24) certain inclination in simulating the effect of the first eye (LA) view of the user (17) through the first eye lens (LA) to be demonstrated

consider and / or that

the simulation device (23) is designed to simulate the effect of a glance of the second eye (RA), the orientation determined by the orientation sensor (24) and / or the movement determined by the movement sensor (24) and / or that of the inclination sensor ( 24) to take into account certain tendency to simulate the effect of the second eye (RA) of the user (17) by the second eye (RA) lens to be demonstrated.

10. Display device (1) according to one of the preceding claims, characterized

marked that

- An automatic changing means (23) for changing the first imaging optics

(6) is attached to the holding device (2) and / or that

- An automatic changing means (23) for changing the second imaging optics

(7) is attached to the holding device (2).

11. Display device (1) according to the indirectly or directly to claim 7 back claim 10, characterized in that - The automatic changing means (23) for changing the first imaging optics (6) is formed, the first imaging optics (6) based on the orientation of the orientation sensor (24) orientation and / or based on the motion sensor (24) determined movement and / or to change on the basis of the inclination sensor (24) determined inclination and / or that

- The automatic changing means (23) for changing the second imaging optics (7) is formed, the second imaging optics (7) based on the orientation of the orientation sensor (24) orientation and / or determined by the movement sensor (24) movement and / or to change according to the slope determined by the inclination sensor (24).

12. Display device (1) according to one of the preceding claims, characterized

marked that

- On the holding device (2) a first viewing direction determination device (36, 38, 23) is provided to determine the direction of the view of the first eye (LA) and / or that

- On the holding device (2) a second Sichtrichtungsbestirnmungseinrichtung (37, 38, 23) is provided to determine the direction of the gaze of the second eye (RA).

13. Display device (1) according to claim 12 directly or indirectly dependent on claim 8, characterized in that

the simulation device (23) is designed to simulate the effect of a first-eye view (LA) of the first sight direction determining device (36, 38, 23) to take into account certain direction of the view of the first eye (LA) in the simulation and / or that

- The simulation means (23) for simulating the effect of a glance of the second eye (RA) is adapted to take into account the direction determined by the second bending direction determining means (37, 38, 23) of the direction of the second eye (RA) in the simulation.

14. Display device (1) according to one of the indirectly or directly to claim 10 back claims 12 or 13, characterized in that

- The automatic changing means (23) for changing the first imaging optics (6) is formed, the first imaging optics (6) based on that of the first

Viewing direction determining means (36, 38, 23) to change certain direction of the view of the first eye (LA) and / or that - The automatic Vermdenmgseinrichtung (23) for changing the second imaging optics (7) is formed, the second imaging optics (7) based on that of the second

Viewing direction determining means (37, 38, 23) to change the direction of the look of the second eye (RA).

15. Display device (1) according to one of the preceding claims, characterized

marked that

- The holding device (2) carries a first of the viewing direction of the first eye so controlled camera (61) with an optical axis, that the optical axis of the first camera (61) and in the direction of the first eye (LA) through the pupil center of the first eye (LA) extending optical axis and that the holding device (2) carries a first distance sensor, which is arranged such that the first distance sensor detects a distance to an object from the first camera (61) in the form of a camera image detected object and the simulation means (23) is adapted to simulate the effect of a first eye (LA) view of the user through a spectacle lens for the first eye (LA) to be demonstrated, from the camera image taken by the first camera (61) and from the first one Distance sensor detected distance to simulate the image generated in the first image plane (£) of the first imager (9) and / or that

- The holding device (2) carries a second from the viewing direction of the second eye (RA) so controlled camera (62) having an optical axis, that the optical axis of the second

Camera (62) and in the direction of the second eye through the pupil center of the second eye (RA) extending optical axis and that the holding device (2) carries a second distance sensor, which is arranged such that the second distance sensor is a distance to one of the second camera (62) detected in the form of a camera image detected object and that the simulation means (23) for simulating the effect of a

View of the second eye (RA) of the user through a spectacle lens to be demonstrated for the second eye (RA) is set, from the camera image taken by the second camera (62) and the distance detected by the second distance sensor in the first image plane (E ) image generated by the imager (9) and / or the image generated in the second image plane (Ε ') by the second imager (9').

16. System comprising a display device (1) according to one of the preceding claims and a manual control device for driving the first Refraktiorisbestimmungsoptik (9) and / or the first imaging optics (6) and / or the Simulatioriseinrichtung (23).

17. A system comprising a first imager and a holding device (2) which can be placed on the head of a user, having a first imaging optic (6) attached to the holding device (2) and adapted to receive a first image plane (E) from the first imager Imagine the image generated first image so that the user in the upside down state of the holding device (2) with a first eye (LA) perceive, characterized in that the holding device (2) carries a first Refraktiorisbestmunungsoptik (9) in the mounted on the head state of the holding device (2) for determining the subjective refraction of the first eye (LA) is formed and / or that the first imaging optics (6) is formed changeable.

18. System according to claim 17, characterized in that attached to the holding device (2) is a second variably designed imaging optical system (7), which is designed to image the image produced in the first image plane such that the user (17) in the mounted on the head state of the holding device (2) with the second eye (RA) and / or that the holding device (2) carries a second refraction determining optics (10) in the mounted on the head state of the holding device (2) Determining the subjective refraction of the second eye (RA) is formed and that an image separation system

is provided in order to supply first image contents of the image generated in the image plane (E) exclusively to the first eye (LA) and second image contents deviating from the first image contents exclusively to the second eye (RA).