WO2024110084A1

WO2024110084A1 - Optical apparatus, optical element, optical construction, construction kit, and method for adapting and/or individualizing the optical construction

Info

Publication number: WO2024110084A1
Application number: PCT/EP2023/074451
Authority: WO
Inventors: Christian Adam Grafenburg; Carsten Reichert
Original assignee: Robert Bosch Gmbh
Priority date: 2022-11-23
Filing date: 2023-09-06
Publication date: 2024-05-30
Also published as: DE102022212478A1

Abstract

The starting point of the invention is an optical apparatus (46a-c), especially a smartglasses apparatus, having a virtual retinal scan display (10a-c) comprising at least one laser projector (12a-c) for the output of at least one scanned laser beam (14a-c) and comprising at least one optical element (20a-c) which is formed separately from a transmissive glass (16a-c) of an optical construction (18a-c), especially a spectacle lens of a pair of smartglasses, and which is provided to interact, preferably diffractively interact, with the scanned laser beam (14a-c), especially prior to an incidence on an eye (22a-c) of a user. It is proposed that the optical element (20a-c) is assembled in replaceable and/or spatially adjustable fashion.

Description

Optical device, optical element, optical construction, kit and method for adapting and/or individualising the optical construction

State of the art

An optical device with a virtual retinal display (retinal scan display) has already been proposed, comprising at least one laser projector for outputting at least one scanned laser beam and comprising at least one optical element formed separately from a transparent glass of an optical construction, which is intended to interact with the scanned laser beam.

Disclosure of the invention

The invention is based on an optical device, in particular a data glasses device, with a virtual retinal display (retinal scan display) having at least one laser projector for outputting at least one scanned laser beam and having at least one optical element formed separately from a transparent glass of an optical construction, in particular from a spectacle lens of data glasses, which is intended to interact with the scanned laser beam, in particular before it strikes an eye of a user, preferably diffractively, e.g. reflecting or transmitting.

It is proposed that the optical element is replaceable, preferably completely removable and/or re-insertable, and/or spatially adjustable, preferably within a space limited by the optical construction and is preferably mounted within an area delimited by the optical construction, e.g. adjustable by moving, tilting or twisting. The optical element is preferably mounted in a spatially adjustable manner, in particular in the optical construction. This advantageously makes it possible to individualize the optical device for different users. Compatibility with different users, who have, for example, different face shapes, different head geometries, different eye distances and/or different visual impairments, e.g. astigmatisms, can be increased. A high variety of optical devices, in particular data glasses, can advantageously be achieved, in particular in a particularly simple manner. A variety of users can advantageously be divided between the design of the data glasses and the optical element, e.g. holographic-optical element. In particular, to achieve a comparably large variety of variants compared to a permanently installed optical element, fewer variants of data glasses are advantageously required. Manufacturing costs can advantageously be reduced. The optical device, in particular the data glasses, can advantageously be used for several users, in particular reused.

The optical device can in particular form part of a pair of binoculars, a telescope, a microscope, a periscope, an ophthalmic examination device or another optical device of a comparable category. Preferably, however, the optical device forms part of a pair of data glasses. “Data glasses” is to be understood in particular as a wearable (head-mounted display) by means of which information can be added to a user’s field of vision. Data glasses preferably enable augmented reality and/or mixed reality applications. Data glasses are also commonly referred to as smart glasses or VR glasses or AR glasses. In particular, the data glasses have a virtual retinal display (also called a retinal scan display or light field display), which is particularly familiar to those skilled in the art. The virtual retinal display is particularly designed to scan an image content sequentially by deflecting at least one visible laser beam of at least one time-modulated light source, such as one or more (RGB) laser diodes of a laser projector, and to project it directly onto the retina of the user's eye by means of optical elements. The image source is designed in particular as an electronic image source, for example as a graphics output, in particular an (integrated) graphics card, of a computer or processor or the like. The (RGB) images to be displayed are designed in particular as color image data, e.g. RGB image data. In particular, the (RGB) images to be displayed can be designed as still or moving images, e.g. videos. In particular, the laser projector is provided to generate the (RGB) images to be displayed and to output them via a visible (RGB) laser beam. In particular, the laser projector has RGB laser diodes which generate the visible laser beam/the visible laser signal. In particular, the laser projector can also have at least one infrared laser diode which generates the infrared laser beam/the infrared laser signal. The transparent glass of the optical construction, which in the case of data glasses is formed by the spectacle lens, for example, can be set up in the virtual retina display to superimpose and/or combine the image augmented by the image content with a real environment observable through the transparent glass, in particular by serving as a reflective or diffractive surface for the projected image content. This superimposition and/or combination can arise from a reflection at a refractive index transition or at diffractive structures, such as holograms. In particular, holographic optical elements (HOEs) integrated into a spectacle lens of data glasses are sometimes referred to as free space combiners. These HOEs preferably have a high angle and/or wavelength selectivity.

In particular, the laser projector can be integrated into a part of the optical device or the optical construction with the optical device that is different from the transparent glass, for example into a temple of the data glasses. The laser beams of the laser projector can be deflected in two dimensions by a MEMS mirror system with a tiltable element and thus write a scanned/rasterized image on a retina of a user of the optical construction. Alternatively, two 1D MEMS mirrors could also be used, with one 1D MEMS mirror writing pixel rows and the other 1D MEMS mirror writing pixel columns of the displayed image content. A laser beam generated by the RGB laser diodes of the laser projector is directed via the MEMS mirrors or the MEMS mirror system and the free space combiner so that the laser beam has a small beam diameter at the location of an entrance pupil of the user's eye, which beam diameter preferably has a smaller area than a pupil of the user's eye. This small circle of confusion created by the laser beam in a pupil plane of the virtual retinal display is called a "beamlet" or "exit pupil". The "beamlet" is preferably a small area in the pupil of the user's eye through which all individual rays of all pixels of the laser beam pass. In particular, all of the image information (pixels) of the image content is present in the "beamlet". An "exit pupil" (Ramsden circle) is to be understood in particular as an image-side image of a (virtual) aperture stop of the optical components of the optical device that generate the image of the (RGB) image. In particular, when the optical device is used as intended, at least one of the exit pupils of the optical device overlaps with an entrance pupil of the user's eye. In particular, the exit pupil of the optical device forms at least part of an eyebox. In particular, a diameter of the exit pupil is smaller than an average diameter, preferably smaller than a minimum diameter of the entrance pupil of the user's eye. In this case, an "eyebox" is understood to mean a spatial area within which all light rays of the scanning projection of the laser projector can pass through the entrance pupil of the user's eye. Preferably, a pupil of the user of the virtual retinal display is arranged in the pupil plane during normal operation, so that the eyeboxes and the user's pupil can overlap. The exit pupil plane can run at least substantially parallel to a lens of the data glasses. If the user's pupil moves, for example due to eye movement, the user will only see a non-vignetted augmented (digital) image as long as the beamlet/exit pupil is still within the pupil area. The area in which the pupil center can move so that a complete image is still visible is the eyebox.

Since a single stationary beamlet / exit pupil often only produces an insufficiently small eyebox, at least two methods are known for optical devices based on virtual retinal displays that Eyebox to enlarge. Both known methods create several spatially separated beamlets / exit pupils in the pupil plane: a) the Intel-Vaunt method, in which several different light sources are used for each display color (e.g. red) and in which the associated optical construction has different hologram layers, each matching these different wavelengths, in order to obtain several beamlets / exit pupils with slightly different colors, or b) the North Focals method, in which a scan area of the MEMS mirror system is divided into four segments and the laser beams are illuminated on a segmented lens with several, e.g. four, segment elements, so that the light emerging from the respective segments shines on the same HOE from different directions, thereby creating several beamlets / exit pupils in the pupil plane. It is also known that so-called eye tracking systems are used to obtain knowledge of a current pupil position for the controlled positioning of the beamlet / exit pupil. For example, MEMS tilting mirror systems could be used for this purpose, which can tilt a mirror surface in two dimensions and thereby continuously move the beamlet/exit pupil and thus track the movement of the user's pupil.

The fact that the optical element is "mounted in a spatially adjustable manner" is to be understood in particular to mean that the optical element is adjustable when mounted in the optical structure, e.g. at least displaceable, at least tiltable or preferably at least rotatable. The term "intended" and/or "set up" is to be understood in particular to mean specially programmed, designed and/or equipped. The term "an object is intended for a specific function" is to be understood in particular to mean that the object fulfills and/or carries out this specific function in at least one application and/or operating state.

It is further proposed that the optical element can be mounted and/or dismantled without tools. This advantageously allows for simple and/or quick assembly, which can preferably be carried out on site or by a user himself. For example, the optical element can be integrated into a The optical element can be inserted into the receiving compartment and/or removed from the receiving compartment, wherein a locking device arranged in the receiving compartment preferably ensures that the optical element does not come loose from the receiving compartment on its own. Disassembly preferably comprises complete removal of the optical element. Assembly can preferably comprise completely reinstalling an optical element. For example, replacement can comprise removing a currently mounted optical element and inserting another, new optical element. In particular, by replacing the optical element, a beam path within the optical device, preferably the optical construction, can be changed and/or adapted to a user. The individual adaptability of the mounted optical element to a specific user advantageously enables advance production of the optical construction, e.g. the data glasses, independent of the user. The individualization is then advantageously only carried out in response to an order for the optical construction by the specific user or during or after delivery of the optical construction to the specific user.

It is also proposed that the optical device, in particular the data glasses, have a glasses frame and/or a glasses temple, wherein the optical element is at least partially, preferably completely, mounted in the glasses frame and/or at least partially, preferably completely, in the glasses temple and/or at least partially, preferably completely, in a unit arranged on the glasses frame and/or on the glasses temple, e.g. electronic unit or laser projector unit, in an exchangeable manner. This advantageously makes it possible to easily mount or change the optical element. A compact and/or ergonomic design can advantageously be achieved.

If the spectacle frame and/or the temple and/or the unit arranged on the spectacle frame and/or the temple has a slot-like opening for inserting or removing the optical element during assembly or disassembly of the optical element in or from the virtual retinal display, a simple guided and preferably tool-free assembly and/or disassembly can advantageously be made possible. Preferably, the optical element is designed in the form of a platelet and/or a disk. Preferably, the optical element has a shape of an at least substantially rectangular, thin platelet or a shape of an at least substantially round, thin disk.

It is further proposed that the optical device has a fine adjustment unit which is intended to allow a fine adjustment, in particular manual or at least machine-assisted, of a position and/or an alignment of the mounted optical element within the virtual retinal display. This advantageously makes it possible to achieve a particularly precise adjustment of the optical device, in particular of an optical system of the optical device. This advantageously makes it possible to achieve a particularly high display quality of the optical device, in particular of the virtual retinal display. For example, the fine adjustment unit can comprise one or more fine adjustment elements, such as (precision) adjusting screws, by means of which a position of the optical element mounted in particular in the spectacle frame and/or the temple and/or the unit arranged on the spectacle frame and/or the temple can be finely adjusted and/or readjusted following installation or at another time. In particular, the fine adjustment elements can be manipulated manually or by means of actuators (e.g. after being controlled via data glasses software). It is also conceivable that parts of the optical device, such as parts of the MEMS mirror system of the laser projector, in particular the scanning angle of the MEMS mirror system, are or will be calibrated depending on the currently mounted optical element. This can be done automatically or with user support. Alternatively, the optical device can also have already prepared calibrations, e.g. of parts of the laser projector, such as the MEMS mirror system, in particular the scanning angle of the MEMS mirror system, for various optical elements. Depending on the installed optical element, a calibration state corresponding to the mounted optical element would be activated in this case. For example, the respectively installed/active optical element could be automatically recognized and a corresponding calibration state, if already present on the optical construction, set. It is further proposed that the optical element is designed as a holographic optical element (HOE) or as a concave mirror. This advantageously allows a large number of different, in particular individualized, optical corrections to be implemented in a preferably particularly simple manner to adapt to the different face shapes, the different head geometries, the different eye distances and/or the different visual impairments of the users. Cost-effective production, in particular of the large number of different optical elements, can advantageously be achieved. In particular, the optical construction, in particular the data glasses, has a further HOE which is designed and arranged separately from the HOE. The further HOE is in particular integrated into one of the transparent lenses of the optical construction and/or combined with a transparent lens of the optical construction, preferably integrated into one of the spectacle lenses of the data glasses and/or combined with one of the spectacle lenses of the data glasses. In particular, the further HOE is also arranged in a beam path of the scanned laser beam emitted by the laser projector, preferably downstream of the optical element. In particular, the HOE is designed as a reflection HOE. Alternatively, the HOE can also be designed as a transmission HOE. Preferably, however, the further HOE is always designed as a reflection HOE.

If the optical element has different optical functions, in particular different HOEs, on opposite sides, a high level of versatility and/or compactness can advantageously be achieved. In particular, in this case, the active optical function of the optical element installed in the optical device, in particular the optical function that interacts with the scanned laser beam, can be changed by simply turning the optical element over/mounting it upside down. For example, the optical element on the opposite sides could comprise different refractive error corrections, each optimized for day and night. For example, the optical element on the opposite sides could comprise different optical functions, each optimized for different applications of the optical design. For example, the optical element on the opposite sides could comprise different optical functions, each optimized for different users of the virtual retinal display (holo- gram). In particular, the optical element can be installed in the optical system in different orientations. Preferably, the optical element can be installed in the optical system in such a way that either one side with a first optical function or the other side with a second optical function different from the first optical function interacts with the laser beam emitted by the laser projector.

If, alternatively or additionally, the optical element has at least two, preferably more than two, different optical functions, in particular different HOEs, on at least one side, a particularly high level of versatility and/or compactness can advantageously be achieved. In particular, in this case, the active optical function of the optical element installed in the optical device, in particular the optical function that interacts with the scanned laser beam, can be changed by simply moving the mounted optical element. For example, the different areas of the optical element arranged on the same side of the optical element could comprise different refractive error corrections optimized for day and night, different optical functions optimized for different applications of the optical construction and/or different optical functions (holograms) optimized for different users of the virtual retinal display. In particular, the optical element with the multiple optical functions can be designed to be removable from the optical device, in particular the optical construction, preferably the data glasses, i.e. to be interchangeable. Alternatively, however, the optical element with the multiple optical functions could also be installed in the optical device, in particular the optical construction, preferably the data glasses, in a fixed and spatially limited manner, in particular in one plane, and displaceable.

In this context, it is also proposed that the different optical functions, in particular the different HOEs, are arranged in a linear row offset from one another on the side of the optical element. This advantageously enables the setting of the active optical function in a particularly simple, e.g. automatable, manner, for example by manually or automatically moving the mounted optical element locally. For example, in the case of different Different optical functions can be brought into a beam path of the scanned laser beam by inserting the optical element into the slot-like opening at different depths. It is of course also conceivable that both sides of the optical element comprise several different optical functions that are arranged offset from one another in a linear row or on a circular path around a central point of the optical element. In this case, the optical element advantageously does not have to be removed from the optical construction in order to adjust the active optical function.

Alternatively, it is proposed that the different optical functions, in particular the different HOEs, are arranged on a circular path around a central point of the optical element, offset from one another on the side of the optical element. This advantageously enables the adjustment of the active optical function in a particularly simple, e.g. automated, manner, for example by manually or automatically rotating the mounted optical element, preferably about a rotation axis that is fixed relative to the optical structure, in particular relative to a frame of the data glasses. In this case, the optical element can be arranged to be rotatable within its fixed mounting position, in particular manually or with mechanical support. In this case, the optical element advantageously does not have to be removed from the optical structure to adjust the active optical function. For example, there could be a rotary wheel on one side, in particular the outside, of the optical structure, e.g. on an inside or outside of the temple or the frame of the data glasses, by operating which different optical functions can be brought into the beam path of the scanned laser beam.

Furthermore, the optical element, in particular the HOE or the concave mirror, of the optical device and the optical construction, for example the data glasses, the binoculars, the telescope, the microscope, the periscope or the ophthalmic examination device, with the optical device are proposed. This advantageously makes it possible to individualize the optical construction for different users. Compatibility with different users, who, for example, have different facial shapes, different different head geometries, different interpupillary distances and/or different visual impairments.

Furthermore, a kit with at least one, preferably more than one, optical construction and with at least two, preferably more than two, optical elements having different optical functions, which are intended to be mounted in the optical construction, is proposed. This advantageously makes it possible to achieve a high level of flexibility and a high level of individualization. In particular, the kit is intended to provide individualized optical constructions, preferably data glasses, for a large number of different users who, for example, have different face shapes, different head geometries, different eye distances and/or different visual impairments.

In addition, a method for adapting and/or individualizing the optical construction, in particular the data glasses, preferably by means of the optical device is proposed, wherein in at least one adaptation and/or individualization step, the optical element, which is formed separately from a transparent glass of the optical construction, in particular from the spectacle lens of the data glasses, and which is intended to interact with the scanned laser beam of the virtual retinal display of the optical construction, in particular before it hits a user's eye, preferably diffractively, is subsequently mounted in the optical construction and/or dismantled from the optical construction outside of a production line. This advantageously makes it possible to customize the optical construction for different users. Compatibility with different users, who have, for example, different face shapes, different head geometries, different eye distances and/or different visual impairments, can be increased. The adaptation and/or individualization using the proposed method is advantageously so simple that it can also be carried out (repeatedly) by the user himself.

The optical device according to the invention, the optical element according to the invention, the optical construction according to the invention, the construction according to the invention The kit and the method according to the invention should not be limited to the application and embodiment described above. In particular, the optical device according to the invention, the optical element according to the invention, the optical construction according to the invention, the kit according to the invention and the method according to the invention can have a number of individual elements, components and units as well as method steps that differs from the number stated herein in order to fulfill a function described herein. In addition, in the value ranges stated in this disclosure, values within the stated limits should also be considered disclosed and can be used as desired.

Drawing

Further advantages emerge from the following description of the drawing. The drawing shows three embodiments of the invention. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will also expediently consider the features individually and combine them into further useful combinations.

Show it:

Fig. 1 is a schematic representation of an optical construction with an optical device,

Fig. 2 is a schematic representation of the optical device with an optical system having an optical element,

Fig. 3 an exemplary kit for various user-adapted optical constructions,

Fig. 4 is a schematic flow diagram of a method for adapting and/or individualizing the optical construction,

Fig. 5 is a schematic representation of an alternative optical device with an optical system having an alternative optical element and Fig. 6 is a schematic representation of another alternative optical device with an optical system having another alternative optical element.

Description of the embodiments

Fig. 1 shows a schematic representation of an optical construction 18a. The optical construction 18a is designed as a data glasses, for example. Alternative optical constructions, such as binoculars, a telescope, a microscope, a periscope or an ophthalmic examination device, are conceivable. The optical construction 18a has an optical device 46a. The optical device 46a has a virtual retinal display (retinal scanning display) 10a. The optical construction 18a comprises a spectacle frame 54a. The optical device 46a has a spectacle frame 24a. The spectacle frame 24a forms part of the spectacle frame 54a. The optical device 46a has spectacle temples 26a. The spectacle temples 26a form part of the spectacle frame 54a. The optical construction 18a comprises transparent lenses 16a. The transparent lenses 16a are designed as spectacle lenses. In Fig. 1, an eye 22a of a user is shown as an example. The virtual retinal display 10a has a laser projector 12a. The laser projector 12a is set up at least to generate and/or output at least one scanned laser beam 14a. The laser projector 12a has at least one laser source 66a, e.g. a laser diode, for generating the laser beam 14a (see Fig. 2). The scanned laser beam 14a generates an image display of the virtual retinal display 10a on a retina 58a of the eye 22a of the user. The laser projector 12a is at least partially integrated into the glasses frame 54a. The transparent glass 16a forms part of the virtual retinal display 10a by comprising part of an optical system 60a of the virtual retinal display 10a, e.g. an integrated holographic optical element (HOE) 56a, which is designed differently from an optical element 20a of the optical device 46a, described in more detail below.

Fig. 2 shows a schematic representation of the optical device 46a. The optical device 46a forms, for example, a data glasses device. The optical Device 46a comprises the optical system 60a. The optical system 60a can be partially formed by the laser projector 12a. The optical system 60a can be partially formed separately from the laser projector 12a. The optical system 60a can comprise beam-forming optics 62a. The beam-forming optics 62a are integrated into the laser projector 12a in the case shown. The optical system 60a has a MEMS mirror system 64a. The MEMS mirror system 64a is integrated into the laser projector 12a in the case shown. The MEMS mirror system 64a is provided to scan the laser beam 14a emitted by the laser source 66a by pivoting at least one mirror of the MEMS mirror system 64a and thereby generate a two-dimensional image. The optical system 60a can optionally have a collimation lens 68a. In the case shown, the optional collimation lens 68a is arranged separately from the laser projector 12a. Alternatively, an embodiment of the optical system 60a without a collimation lens 68a is also conceivable. The optical system 60a has a 2D tilting mirror system 70a. In the case shown, the 2D tilting mirror system 70a is arranged separately from the laser projector 12a. The 2D tilting mirror system 70a is designed to move an exit pupil 72a (beamlet) of the optical system 60a and/or an eyebox 74a of the optical system 60a, in particular continuously, preferably in order to thereby track a pupil movement of the user's eye 22a. Alternatively, the optical system 60a could also be designed without the 2D tilting mirror system 70a.

The optical device 46a has the optical element 20a. The optical element 20a forms part of the optical system 60a. The optical element 20a is arranged separately from the laser projector 12a. The optical element 20a is designed separately from the transparent glass 16a of the optical construction 18a, in particular from the HOE 56a integrated into the spectacle lens. The optical element 20a is intended to interact diffractively with the scanned laser beam 14a before it strikes the eye 22a of the user. The optical element 20a can be designed as a hologram mirror (reflection hologram). The optical element 20a can alternatively also be designed as a transmission hologram. The optical element 20a is designed as a holographic-optical element. The optical element 20a can alternatively also be designed as a concave mirror. It is conceivable that the optical system 60a, as shown in Fig. 2, has a further optical element 76a. The further optical element 76a is provided to redirect the scanned laser beam 14a leaving the optical element 20a to the HOE 56a integrated in the spectacle lens. The optical element 20a shown as an example in Fig. 2 has different optical functions 38a, 40a, e.g. different holograms, in particular different HOEs, on opposite sides 32a, 34a. The optical element 20a can be installed in the slot-like opening 28a in different orientations. As a result, one of the optical functions 38a, 40a arranged on the opposite sides 32a, 34a is selected and active. Alternatively, the optical element 20a could also have an optical function 38a on only one of the sides 32a, 34a or have the same optical function 38a on both sides 32a, 34a.

The optical element 20a is mounted so that it can be replaced. The optical element 20a is mounted so that it can be adjusted spatially. The optical element 20a can be mounted without tools. The optical element 20a can be dismantled without tools. The optical element 20a is mounted so that it can be replaced in the glasses frame 24a. The optical element 20a is mounted so that it can be replaced in the glasses temple 26a. Alternatively, the optical element 20a could also be mounted so that it can be replaced, at least in part, in a unit (not shown) arranged on the glasses frame 24a and/or on the glasses temple 26a. The glasses frame 24a has a slot-like opening 28a for inserting or removing the optical element 20a when assembling or disassembling the optical element 20a into the virtual retinal display 10a or from the virtual retinal display 10a. Alternatively or additionally, the temple 26a and/or the unit arranged on the frame 24a and/or on the temple 26a can have the slot-like opening 28a. The optical device 46a has a fine adjustment unit 30a. The fine adjustment unit 30a is provided to allow manual and/or at least machine-assisted fine adjustment of a position and/or an alignment of the mounted optical element 20a within the virtual retinal display 10a. For example, this could be accomplished via fine adjustment screws (not shown) or fine adjustment servo motors of the fine adjustment unit 30a. The optical device 46a has a holding unit 78a for holding the optical element 20a in the optical system 60a. The fine adjustment unit 30a can be at least partially integrated into the holding unit 78a.

Fig. 3 shows an example kit 48a for various user-adapted optical constructions 18a, in particular data glasses. The kit 48a is intended to provide various individualized optical constructions 18a for different users. The kit 48a has, for example, two different optical base constructions 18a, 18'a. The kit 48a can of course have more than two optical base constructions 18a, 18'a. The optical base constructions 18a, 18'a can, for example, form data glasses with glasses frames 54a, 54'a suitable for different head shapes or eye distances. The kit 48a has at least two (in Figure 3: three) different optical elements 20a, 20'a, 20"a. The different optical elements 20a, 20'a, 20"a have different optical functions 38a, 40a, 50a. Of course, it is also conceivable that at least some of the optical elements 20a, 20'a, 20"a of the kit 48a are designed in the manner described in the further embodiments of this document and, for example, each have several optical functions 38a, 40a, 50a at once. The optical elements 20a, 20'a, 20"a of the kit 48a are intended to be mounted in one of the optical constructions 18a, 18'a of the kit 48a, in particular in an optical system 60a of one of the optical constructions 18a, 18'a of the kit 48a, in order to produce the respective individualized optical construction 18a.

Fig. 4 shows a schematic flow diagram of a method for adapting and/or individualizing an optical construction 18a, in particular data glasses, preferably by means of the optical device 46a. In at least one adaptation and/or individualization step 80a, the optical element 20a is subsequently dismantled from the optical construction 18a, in particular the data glasses, outside of a production line for optical constructions 18a, in particular for data glasses. In at least one further adaptation and/or individualization step 52a, the optical element 20a is subsequently mounted into the optical construction 18a, in particular the data glasses, outside of the production line for optical constructions 18a, in particular for data glasses. In at least one optional additional or further In the adaptation and/or individualization step 82a, the optical element 20a can be spatially adjusted within the optical device 46a, in particular within the spectacle frame 54a. In this case, the spatial adjustment can be used to select and/or adjust, for example, one of several optical functions 38b, 38c, 40b, 40c, 50b, 50c of a single optical element 20b, 20c comprising several optical functions 38b, 38c, 40b, 40c, 50b, 50c at once.

Two further embodiments of the invention are shown in Figures 5 and 6. The following descriptions and the drawings are essentially limited to the differences between the embodiments, whereby with regard to components with the same designation, in particular with regard to components with the same reference numerals, reference can also be made to the drawings and/or the description of the other embodiments, in particular Figures 1 to 4. To distinguish the embodiments, the letter a is placed after the reference numerals of the embodiment in Figures 1 to 4. In the embodiments in Figures 5 and 6, the letter a is replaced by the letters b and c.

Fig. 5 shows a schematic representation of an alternative optical device 46b. The alternative optical device 46b comprises an optical system 60b. The alternative optical device 46b has an alternative optical element 20b. The alternative optical element 20b forms part of the optical system 60b. The alternative optical element 20b is designed as a holographic optical element (HOE). The alternative optical element 20b can alternatively also be designed as a concave mirror. The alternative optical element 20b has at least two (in the example of Fig. 5: three) different optical functions 38b, 40b, 50b, in particular different holograms, on at least one side 32b. The different optical functions 38b, 40b, 50b, in particular the different HOEs, are arranged offset from one another in a linear row 36b on the side 32b of the alternative optical element 20b. The alternative optical element 20b can have several different optical functions 38b, 40b, 50b on only one side 32b or also on both opposite sides 32b, 34b. The alternative optical element 20b is mounted interchangeably. The alternative opti- see element 20b is mounted in a spatially adjustable manner. The alternative optical element 20b is mounted in a linearly adjustable manner. The respective currently active optical function 38b, 40b, 50b of the alternative optical element 20b can be selected by choosing an insertion depth of the alternative optical element 20b in a slot-like opening 28b of the alternative optical device 46b, in particular a spectacle frame 54b of data glasses. Alternatively, it is conceivable that the alternative optical element 20b is only mounted in a spatially adjustable manner in the alternative optical device 46b, but is not completely removable/replaceable, in particular without tools. The alternative optical device 46b has a holding unit 78b for an exchangeable and/or adjustable holder of the alternative optical element 20b in the optical system 60b.

Fig. 6 shows a schematic representation of a further alternative optical device 46c. The further alternative optical device 46c comprises an optical system 60c. The further alternative optical device 46c has a further alternative optical element 20c. The further alternative optical element 20c forms part of the optical system 60c. The further alternative optical element 20c is designed as a holographic optical element (HOE). The further alternative optical element 20c can alternatively also be designed as a concave mirror. The further alternative optical element 20c has at least two (in the example of Fig. 6: three) different optical functions 38c, 40c, 50c, in particular different holograms, on at least one side 32c. The different optical functions 38c, 40c, 50c, in particular the different HOEs, are arranged on a circular path 42c around a central point 44c of the further alternative optical element 20c, offset from one another on the side 32c of the further alternative optical element 20c. The further alternative optical element 20c can have several different optical functions 38c, 40c, 50c on only one side 32c or on both opposite sides 32c, 34c. The further alternative optical element 20c is mounted in a spatially adjustable manner. The further alternative optical element 20c is mounted in a rotationally adjustable manner. The further alternative optical element 20c can also be mounted in an interchangeable manner. The respective currently active optical function 38c, 40c, 50c of the further alternative optical element 20c can be selected by selecting a rotation position of the further The position of the further alternative optical element 20c within the further alternative optical device 46c, in particular within a spectacle frame 54c of data glasses, can be selected. It is conceivable that the further alternative optical element 20c cannot be completely removed from the optical device 46c without causing any damage/cannot be replaced without causing any damage. The further alternative optical device 46c has a holding unit 78c for a rotationally adjustable mounting of the further alternative optical element 20c in the optical system 60c.

Claims

Expectations

1. Optical device (46a-c), in particular data glasses device, with a virtual retinal display (retinal scan display, 10a-c) having at least one laser projector (12a-c) for outputting at least one scanned laser beam (14a-c) and having at least one optical element (20a-c) formed separately from a transparent glass (16a-c) of an optical construction (18a-c), in particular from a spectacle lens of data glasses, which is intended to interact with the scanned laser beam (14a-c), in particular before it strikes an eye (22a-c) of a user, preferably diffractively, characterized in that the optical element (20a-c) is mounted in an exchangeable and/or spatially adjustable manner.

2. Optical device (46a-c) according to claim 1, characterized in that the optical element (20a-c) can be mounted and/or dismantled without tools.

3. Optical device (46a-c) according to claim 1 or 2, characterized by a spectacle frame (24a-c) and/or by a spectacle temple (26a-c), wherein the optical element (20a-c) is interchangeably mounted at least partially in the spectacle frame (24a-c) and/or at least partially in the spectacle temple (26a-c) and/or at least partially in a unit arranged on the spectacle frame (24a-c) and/or on the spectacle temple (26a-c).

4. Optical device (46a-b) according to claim 3, characterized in that the spectacle frame (24a-b) and/or the spectacle temple (26a-b) and/or the unit arranged on the spectacle frame (24a-b) and/or on the spectacle temple (26a-b) has a slot-like opening (28a-b) for inserting or removing the optical element (20a-b) during assembly or disassembly of the optical element (20a-b) in or out of the virtual retinal display (10a-b)

5. Optical device (46a-c) according to one of the preceding claims, characterized by a fine adjustment unit (30a-c) which is provided to allow a fine adjustment, in particular manual or at least mechanically assisted, of a position and/or an alignment of the mounted optical element (20a-c) within the virtual retinal display (10a-c).

6. Optical device (46a-c) according to one of the preceding claims, characterized in that the optical element (20a-c) is designed as a holographic optical element (HOE) or as a concave mirror.

7. Optical device (46a-b) according to one of the preceding claims, characterized in that the optical element (20a-b) has different optical functions (38a-b, 40a-b), in particular different HOEs, on opposite sides (32a-b, 34a-b).

8. Optical device (46b-c) according to one of the preceding claims, characterized in that the optical element (20b-c) has at least two, preferably more than two, different optical functions (38b-c, 40b-c, 50b-c), in particular different HOEs, on at least one side (32b-c).

9. Optical device (46b) according to claim 8, characterized in that the different optical functions (38b, 40b, 50b), in particular the different HOEs, are arranged in a linear row (36b) offset from one another on the side (32b) of the optical element (20b).

10. Optical device (46c) according to claim 8, characterized in that the different optical functions (38c, 40c, 50c), in particular the different HOEs, are arranged on a circular path (42c) around a central point (44c) of the optical element (20c) offset from one another on the side (32c) of the optical element (20c). Optical element (20a-c), in particular HOE or concave mirror, of an optical device (46a-c) according to one of the preceding claims, in particular according to one of claims 7 to 10. Optical construction (18a-c), for example data glasses, binoculars, telescope, microscope, periscope or ophthalmic examination device, with an optical device (46a-c) according to one of claims 1 to 10. Kit (48a-c) with at least one, preferably more than one, optical construction (18a-c, 18'ac) according to claim 12 and with at least two, preferably more than two, optical elements (20a-c, 20'ac, 20"a-c) according to claim 11 having different optical functions 38a-c, 40a-c, 50a-c), which are intended to be mounted in the optical construction (18a-c, 18'ac). Method for adapting and/or individualizing an optical construction (18a-c), in particular data glasses, preferably by means of an optical device (46a-c) according to one of claims 1 to 10, characterized in that in at least one adaptation and/or individualization step (52a-c, 80a-c), an optical element (20a-c) which is formed separately from a transparent glass (16a-c) of the optical construction (18a-c), in particular from a spectacle lens of the data glasses, and which is intended to interact with a scanned laser beam (14a-c) of a virtual retinal display (10a-c) of the optical construction (18a-c), in particular before it strikes an eye (22a-c) of a user, preferably diffractively, is subsequently mounted into the optical construction (18a-c) outside of a production line and/or dismantled from the optical construction (18a-c).