KR20220017459A - Optical device for augmented reality having visual acuity correction function - Google Patents

Abstract

The present invention relates to an optical device for augmented reality having a vision acuity correction function. The optical device comprises: an image output part for emitting the augmented reality image light, which is image light corresponding to an image for augmented reality; a reflection part for providing the augmented reality image to a user by reflecting and transmitting the augmented reality image light emitted from the image output part toward the pupil of the eye of the user; and optical means provided with the reflection part and transmitting at least a portion of the real object image light, which is the image light emitted from a real object, toward the pupil of the eye of the user. The surface of the reflection part is a curved surface.

Description

Optical device for augmented reality with vision correction function

The present invention relates to an optical device for augmented reality, and more particularly, to an optical device for augmented reality capable of providing a vision correction function to a user having refractive errors such as nearsightedness or farsightedness.

Augmented reality (AR), as is well known, means providing a virtual image or image generated by a computer or the like overlaid on a real image of the real world.

In order to implement such augmented reality, an optical system capable of providing a virtual image or image generated by a device such as a computer overlaid on an image of the real world is required. As such an optical system, a technique using optical means such as a prism that reflects or refracts a virtual image using a head mounted display (HMD) or a glasses-type device is known.

On the other hand, refractive errors such as nearsightedness or farsightedness are very common problems experienced by more than 50% of Koreans. Users with such refractive errors must wear a vision correction device such as glasses, In addition to the device, there is a problem that a separate device for providing augmented reality must be worn double.

In the conventional augmented reality device, in order to solve this problem, a method of attaching a hologram film serving as a mirror to a lens for vision correction and using it as an optical synthesizer has been proposed.

1 shows an augmented reality device implemented in the form of glasses and a hologram film attached to a lens of the augmented reality device and used as an optical synthesizer.

This method has a problem in that the usage conditions (viewing angle, eyebox, etc.) of the augmented reality image (virtual image) are severely limited because the holographic film has a narrow area. In addition, there is a problem in that image quality, resolution, and color expression are remarkably limited due to the limitation of the display that can be used (eg, laser projection). Furthermore, since the visual acuity is corrected with a single curved surface, there is also a limit in that the visual acuity correction range is limited to a range of -4D to +2D.

On the other hand, a method of mounting a separate lens clip to the glasses-type augmented reality device is also known.

2 is a view showing that a separate focus correction lens is mounted in the form of a clip in the glasses-type augmented reality device.

In this method, a focus correction lens is mounted on a spectacle-type augmented reality device with a magnetic clip, and since the focus correction lens must be additionally mounted, there is a disadvantage in that the volume and weight increase, and also virtual images and real images. There is a limitation in design because the lens clip must always be worn only in the direction of the inside of the glasses (toward the user) in order to correct the visual acuity.

Therefore, it is desired to develop a technique for providing a vision correction function in a simple and efficient manner in an augmented reality optical device.

Republic of Korea Patent Publication No. 10-1660519 (2016.09.29 Announcement)

An object of the present invention is to provide an optical device for augmented reality capable of providing a vision correction function to a user having a refractive error, such as nearsightedness or farsightedness, in order to solve the above problems.

In addition, the present invention provides a visual acuity correction function for users with refractive errors by allowing a combination of at least one of a curved design method of an optical means, a curved design method of a reflector, and a method using an auxiliary optical element. Another object of the present invention is to provide an optical device for augmented reality that can be provided efficiently, has a small volume and is light in weight, and can increase the degree of freedom in design and design.

In order to solve the above problems, the present invention provides an optical device for augmented reality having a vision correction function, comprising: an image output unit for emitting augmented reality image light that is image light corresponding to an image for augmented reality; a reflection unit providing an augmented reality image to the user by reflecting and transmitting the augmented reality image light emitted from the image output unit toward the pupil of the user's eyes; and optical means for transmitting at least a portion of the real object image light, which is the image light emitted from the real object, toward the pupil of the user's eye, in which the reflector is disposed, wherein the surface of the reflector is formed as a curved surface An optical device for augmented reality having a function is provided.

Here, the surface of the reflection part may be a concave surface or a convex surface.

In addition, the plurality of reflection units may be formed, and the plurality of reflection units may be composed of at least a portion of unit reflection units obtained by dividing one reflection unit having a curved surface into a plurality of units.

In addition, the plurality of reflection units are divided into a plurality of unit reflection units in a state in which one reflection unit is placed in the frontal direction of the pupil, and among them, the unit reflection unit to be used as the reflection unit maintains its shape in a direction parallel to the front direction of the pupil. It may be disposed to be positioned between the first surface and the second surface of the optical means by moving along the .

In addition, the optical means includes a first surface through which at least a portion of the augmented reality image light reflected by the reflector and the real object image light is emitted toward the user's pupil, and the real object image light opposite the first surface and a second surface incident thereon, wherein the reflection unit is disposed inside between the first surface and the second surface of the optical means, and at least one of the first surface and the second surface of the optical means is formed as a curved surface can be

In addition, the augmented reality image light emitted from the image output unit may be transmitted to the reflection unit through the auxiliary optical element.

According to the present invention, it is possible to provide an optical device for augmented reality capable of providing a vision correction function to a user having a refractive error such as nearsightedness or farsightedness.

In addition, the present invention provides a visual acuity correction function for users with refractive errors by allowing a combination of at least one of a curved design method of an optical means, a curved design method of a reflector, and a method using an auxiliary optical element. It is possible to provide an optical device for augmented reality that can be provided efficiently, has a small volume and is light in weight, and can increase the degree of freedom in design and design.

1 shows an augmented reality device implemented in the form of glasses and a hologram film attached to a lens of the augmented reality device and used as an optical synthesizer.
2 is a view showing that a separate focus correction lens is mounted in the form of a clip in the glasses-type augmented reality device.
3 is a diagram illustrating an optical device 100 for augmented reality as disclosed in Patent Document 1 above.
4 is a view showing the overall configuration of an optical device 200 for augmented reality having a vision correction function according to an embodiment of the present invention.
5 is a view showing the overall configuration of an optical device 300 for augmented reality having a vision correction function according to another embodiment of the present invention.
6 is a view showing the overall configuration of an optical device 400 for augmented reality having a vision correction function according to another embodiment of the present invention.
7 is a view showing the overall configuration of an optical device 500 for augmented reality having a vision correction function according to another embodiment of the present invention.
8 is a view showing the overall configuration of an optical device 600 for augmented reality having a vision correction function according to another embodiment of the present invention.
9 is a view showing the overall configuration of an optical device 700 for augmented reality having a vision correction function according to another embodiment of the present invention.
10 and 11 are views for explaining an optical device 800 for augmented reality having a vision correction function according to another embodiment of the present invention, and FIG. 10 is the overall configuration of the optical device 800 for augmented reality. is a side view showing the , and FIG. 11 is a view for explaining the configuration of the reflection units 21A and 21B.
12 and 13 are views for explaining an optical device 900 for augmented reality according to another embodiment of the present invention, and FIG. 12 is a side view showing the overall configuration of the optical device 900 for augmented reality, FIG. 13 is a diagram for explaining the configuration of the reflection units 22A and 22B.
14 and 15 are diagrams illustrating optical apparatuses 1000 and 1100 for augmented reality according to another embodiment of the present invention.
16 is a view for explaining the vision correction function using the collimators 12A and 12B.
17 and 18 show optical apparatuses 1200 and 1300 for augmented reality according to another embodiment of the present invention, and exemplarily shows a case in which the embodiments of FIGS. 4 to 16 are used in combination.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

First, the basic principle of the present invention will be briefly described with reference to Patent Document 1.

The technology described in Patent Document 1 is a problem of the conventional augmented reality realization device using an optical system, that is, the configuration is complicated and the weight and volume are considerable, so it is inconvenient for the user to wear it, and the manufacturing process is also complicated, so the manufacturing cost is high This is to solve the high problem.

In addition, the conventional apparatus for implementing augmented reality using an optical system has a limitation in that the virtual image becomes out of focus when the user changes the focal length when gazing at the real world. In order to solve this problem, focus on the virtual image Techniques such as using a configuration such as a prism with adjustable distance or electrically controlling a variable focus lens according to a change in focal length have been proposed. However, this technique also has a problem in that it requires a separate operation by the user to adjust the focal length, or hardware and software such as a separate processor for controlling the focal length.

Therefore, as described in Patent Document 1, the present applicant can significantly reduce the volume and weight and simplify the manufacturing process by projecting a virtual image onto the retina through the pupil using a reflector having a size smaller than that of the human pupil, A device for implementing augmented reality that can always provide a clear virtual image regardless of whether the user changes the focal length has been proposed.

3 is a diagram illustrating an optical device 100 for augmented reality as disclosed in Patent Document 1 above.

The optical device 100 for augmented reality of FIG. 3 includes an image output unit 10 , a reflection unit 20 , and an optical means 30 .

The image output unit 10 is a means for emitting image light corresponding to an image for augmented reality, and may be implemented as, for example, a small display device.

The reflection unit 20 provides an image for augmented reality by reflecting image light corresponding to the image for augmented reality emitted from the image output unit 10 toward the user's pupil. The reflection unit 20 has an appropriate angle between the image output unit 10 and the pupil to reflect the image light corresponding to the image for augmented reality emitted from the image output unit 10 to the pupil, and the optical means 30 ) is placed inside.

The optical means 30 is a means for transmitting at least a portion of the image light emitted from the real object, and may be, for example, a spectacle lens or a lens module type that can be used by attaching to the spectacles, and the reflecting unit 20 is embedded therein. . The frame part 40 is a means for fixing and supporting the image output part 10 and the optical means 30 .

The reflector 20 of FIG. 3 is formed to have a size smaller than the human pupil size, that is, 8 mm or less. The depth of field for light can be made close to infinity, that is, the depth of field can be very deep. Here, the depth of field refers to a range recognized as being in focus. As the depth increases, the focal range for the augmented reality image also expands, and thus the focal length for the real world while the user gazes at the real world. Regardless of this change, the focus of the augmented reality image is always recognized as correct. This can be seen as a kind of pinhole effect. Accordingly, the optical device 100 for augmented reality as shown in FIG. 3 always provides a clear virtual image for the augmented reality image regardless of the user changing the focal length while gazing at a real object existing in the real world. can do.

The present invention is characterized by providing an optical device for augmented reality having an eyesight correction function based on the technology as described in Patent Document 1, and having the vision correction function according to the present invention with reference to Figs. The optical device 100 for augmented reality will be described in detail.

4 is a view showing the overall configuration of an optical device 200 for augmented reality having a vision correction function according to an embodiment of the present invention.

Figure 4 (a) shows a side view of the optical device 200 for augmented reality having a vision correction function according to an embodiment of the present invention, Figure 4 (b) is for comparison with this embodiment It shows a side view of the optical apparatus 100 for augmented reality of the prior art as described in patent document 1.

As shown in Fig. 4, the optical device for augmented reality 200 (hereinafter, simply referred to as "optical device for augmented reality 200") provided with the vision correction function of the present embodiment includes an image output unit 10, a reflection part 20 and optical means 30 .

The image output unit 10 is a means for emitting image light corresponding to the image light for augmented reality.

The image output unit 10 is a means for emitting augmented reality image light, which is image light corresponding to the image for augmented reality, toward the optical means 30, for example, by displaying the image for augmented reality on the screen through the screen. It may be composed of a display device 11 such as a small LCD emitting a light and a collimator 12 emitting light collimating the augmented reality image light emitted from the display device 11 .

In FIG. 4 , the case including the collimator 12 is illustrated as an example, but this is not essential and may be omitted. In addition, in addition to the collimator 12 , a reflecting means, refraction means or diffraction means for reflecting, refracting or diffracting the augmented reality image light emitted from the display device 11 and transmitting it toward the optical means 30 may be used.

Since the image output unit 10 itself is not a direct object of the present invention and is known in the prior art, a detailed description thereof will be omitted.

On the other hand, the augmented reality image refers to a virtual image displayed on the screen of the display device 11 and transmitted to the user's pupil 40 through the image output unit 10 , the reflector 20 and the optical means 30 . It means an image, and may be a still image in the form of an image or a moving image.

The augmented reality image is emitted as image light from the display device 11 and transmitted to the user's pupil 40 by the image output unit 10 , the reflector 20 and the optical means 30 , thereby providing a virtual image to the user. is provided, and at the same time, the user is provided with the augmented reality service by directly staring at the real object image light, which is the image light emitted from the real object existing in the real world through the optical means 30 .

The reflection unit 20 is a means for providing the augmented reality image to the user by reflecting the augmented reality image light emitted from the image output unit 10 toward the pupil 40 of the user's eye and transmitting the reflected light.

The reflector 20 is disposed inside between the first face 31 and the second face 32 of the optical means 30 .

Here, the first surface 31 means the surface of the user's pupil 40 when the user wears the optical device 100 for augmented reality, and the second surface 32 means the opposite surface. defined as doing

That is, the optical means 30 includes a first surface 31 through which at least a portion of the augmented reality image light and the real object image light reflected by the reflector 20 are emitted toward the user's pupil 40, and the first surface ( 31 ) and having a second surface 32 on which the actual object image light is incident, and the reflection unit 20 is disposed inside the optical means 30 between the first surface 31 and the second surface 32 . is placed on

On the other hand, in FIG. 4, the augmented reality image light emitted from the image output unit 10 is totally reflected once on the second surface 32 of the optical means 30 and then transmitted to the reflection unit 20. This is an example, and it is of course also possible to configure such that it is totally reflected twice or more on the first surface 31 or the second surface 32 of the optical means 30 and transmitted to the reflection unit 20 .

In addition, the augmented reality image light emitted from the image output unit 10 may be configured to be directly transmitted to the reflection unit 20 without being totally reflected on the inner surface of the optical means 30 .

The reflection unit 20 is disposed with an appropriate inclination angle on the inner surface of the optical means 20 so that the augmented reality image light emitted from the image output unit 10 can be reflected and transmitted toward the pupil 40 of the user's eye. .

As shown in FIG. 4 , the augmented reality image light emitted from the image output unit 10 is totally reflected once on the second surface 32 of the optical means 30 and transmitted to the reflection unit 20 . In this case, the augmented reality image light incident from the image output unit 10 to the second surface 32 of the optical means 30 and the augmented reality image light totally reflected from the second surface 32 and emitted to the reflection unit 20 . In addition, in consideration of the position of the pupil 40, the inclination angle of the reflector 20 is appropriately disposed.

On the other hand, as described above with reference to FIG. 3 , the reflector 20 is preferably formed to have a size smaller than the human pupil size, that is, 8 mm or less, so as to obtain a pinhole effect by increasing the depth of field.

That is, the reflector 20 is formed to have a size smaller than the normal pupil size of a person, that is, 8 mm or less, more preferably 4 mm or less, whereby the depth ( Depth of Field) to near infinity, that is, the depth of field can be very deep, so that even if the user changes the focal length for the real world while looking at the real world, the image for augmented reality is always perceived as in focus regardless of it. It can cause a pinhole effect.

On the other hand, the reflection unit 20, may be formed in two or more, each of the plurality of reflection units 20, as shown in FIG. 4, the second surface 32 of the optical means 30 It is appropriately arranged so as not to block the augmented reality image light from being transmitted to the other reflection unit 20 . Even in this case, the size of each reflective portion 20 is formed to be less than or equal to 8 mm, preferably less than or equal to 4 mm.

On the other hand, the optical means 30 is a means in which the reflection unit 20 is disposed, and transmits at least a portion of the real object image light, which is the image light emitted from the real object, toward the pupil 40 of the user's eyes.

Here, transmitting at least a portion of the real object image light toward the pupil 40 means that the light transmittance of the real object image light does not necessarily have to be 100%.

In addition, as shown in FIG. 4 , the optical means 30 is configured to totally reflect the augmented reality image light emitted from the image output unit 10 , the augmented reality image light emitted from the image output unit 10 is used. is reflected at least once on the first surface 31 or the second surface 32 and transmitted to the reflection unit 20 .

As described above, the optical means 10 includes a first surface 31 through which at least a portion of the augmented reality image light and the real object image light reflected by the reflection unit 20 is emitted toward the user's pupil, and the first It has a second surface 32 opposite to the surface 31 and onto which the actual object image light is incident, and the reflective part 20 is disposed inside between the first surface 31 and the second surface 32 .

The optical means 10 may be formed of a lens made of glass or plastic material and other synthetic resin material.

Meanwhile, at least one of the first surface 31 and the second surface 32 of the optical means 10 may be formed as a curved surface. That is, any one of the first surface 31 or the second surface 32 may be a curved surface, and both the first surface 31 and the second surface 32 may be formed in a curved surface.

Here, the curved surface may be a concave surface or a convex surface. The concave surface means that the central portion is formed thinner than the edge portion and becomes concave when the surface is viewed from the front, and the convex surface is the corresponding surface When viewed from the front, the central part is formed thicker than the edge part, which means that it protrudes convexly.

When the first surface 31 is formed as a concave surface, the second surface 32 may be formed as any one of a flat surface, a concave surface, or a convex surface.

The embodiment shown in Fig. 4 (a) shows a case in which the first surface 31 is formed as a concave surface and the second surface 32 is formed as a flat surface, and is for correcting the eyesight of a near-sighted user.

That is, when the user is nearsighted, according to the augmented reality optical device 100 of FIG. 4B , the augmented reality image light indicated by the red dotted line is emitted from the display device 11 and passes through the collimator 12 . It is incident on the second surface 32 of the optical means 30, is totally reflected from the second surface 32 of the optical means 30, is incident on the reflector 20, and then is reflected by the reflector 20 to the pupil ( 40) is transferred. At this time, since the first surface 31 is formed as a flat surface, the augmented reality image light passes through the first surface 31 as it is, and thus an image is formed in front of the retina.

In addition, since both the first surface 31 and the second surface 32 of the real object image light indicated by the black solid line are formed in a plane, as shown in FIG. A prize will be formed in the front.

On the other hand, according to the optical device 200 for augmented reality of the embodiment of FIG. 4A , the augmented reality image light indicated by the red dotted line is emitted from the display device 11 and passes through the collimator 12 to the optical means 30 ), is incident on the second surface 32 of the optical means 30, is totally reflected from the second surface 32 of the optical means 30, is incident on the reflector 20, and then is reflected by the reflector 20 and transmitted to the pupil 40 do. At this time, since the first surface 31 is formed as a concave surface, the augmented reality image light is emitted in an outward direction while passing through the first surface 31, so that the focal length becomes longer as it passes through the pupil 40, so that the retina It can be seen that it is delivered to form a prize in

In addition, according to the optical device 200 for augmented reality according to the embodiment of FIG. 4 (a), the real object image light indicated by the black solid line also passes through the first surface 31 and diverges in the outward direction, so that the pupil ( 40), the focal length becomes longer, and it can be seen that the image is transferred to the retina.

Accordingly, the optical apparatus 200 for augmented reality according to the embodiment of FIG. 4A may provide a vision correction function for both the augmented reality image light and the real object image light to a near-sighted user.

Meanwhile, the first surface 31 of the optical means 30 may be formed as a convex surface. Even in this case, the second surface 32 may be formed of any one of a flat surface, a concave surface, or a convex surface.

5 is a view showing the overall configuration of an optical device 300 for augmented reality having a vision correction function according to another embodiment of the present invention.

Figure 5 (a) shows a side view of the optical device 300 for augmented reality having a vision correction function according to another embodiment of the present invention, Figure 5 (b) is for comparison with this embodiment It shows a side view of the optical apparatus 100 for augmented reality of the prior art as described in patent document 1.

The embodiment shown in Fig. 5 (a) is characterized in that the first surface 31 of the optical means 30 is formed as a convex surface, and the second surface 32 is formed as a flat surface, and the visual acuity of a farsighted user It is for correction.

That is, when the user is farsighted, according to the optical device 100 for augmented reality of FIG. ), both the augmented reality image light indicated by the red dotted line and the real object image light indicated by the black solid line are imaged behind the retina.

On the other hand, according to the optical device 300 for augmented reality of the embodiment of Fig. 5 (a), the augmented reality image light indicated by the red dotted line is emitted from the display device 11, passes through the collimator 12, and the optical means 30 ) is incident on the second surface 32 of the optical means 30 , is totally reflected from the second surface 32 of the optical means 30 , and is incident on the reflector 20 , and then is reflected by the reflector 20 to the pupil 40 . is transmitted At this time, since the first surface 31 is formed as a convex surface, the augmented reality image light converges inward while passing through the first surface 31 , and thus the focal length is shortened as it passes through the pupil 40 . It can be seen that the image is transmitted to form on the retina.

In addition, according to the optical device 300 for augmented reality of the embodiment of FIG. 5A , the real object image light indicated by the black solid line also passes through the first surface 31 and converges in the inward direction, so that the pupil 40 ), the focal length is shortened and it can be seen that the image is transferred to the retina.

Accordingly, the embodiment of FIG. 5A may provide a vision correction function for both the augmented reality image light and the real object image light for a far-sighted user.

6 is a view showing the overall configuration of an optical device 400 for augmented reality having a vision correction function according to another embodiment of the present invention.

Figure 6 (a) shows a side view of the optical device 400 for augmented reality having a vision correction function according to another embodiment of the present invention, Figure 6 (b) is for comparison with this embodiment It shows a side view of the optical apparatus 100 for augmented reality of the prior art as described in patent document 1.

The embodiment shown in Fig. 6 (a) is characterized in that the second surface 32 of the optical means 30 is formed as a concave surface, and the first surface 31 is formed as a flat surface. It is for visual acuity correction for real object image light.

That is, when the user is nearsighted, according to the optical apparatus 100 for augmented reality of FIG. 6(b), as described above, since both the first surface 31 and the second surface 32 are flat, red Both the augmented reality image light indicated by the colored dotted line and the real object image light indicated by the black solid line are imaged in front of the retina.

On the other hand, according to the optical device 400 for augmented reality according to the embodiment of FIG. 6A , the real object image light indicated by the black solid line passes through the second surface 32 and diverges outward, and then the first It can be seen that the focal length is increased while passing through the surface 31 and the pupil 40, so that the image is transferred to the retina.

However, in the case of the optical device 400 for augmented reality according to the embodiment of FIG. 6A , since the first surface 31 is formed as a flat surface, a vision correction function for augmented reality image light cannot be provided. .

Accordingly, the embodiment of FIG. 6A may provide a visual acuity correction function limited only to real object image light for a user who is nearsighted.

On the other hand, in the embodiment of FIG. 6 ( a ), the augmented reality image light emitted from the image output unit 10 is totally reflected once on the second surface 32 of the optical means 30 , and then the reflection unit 20 . It is designed to enter the In this case, the second surface 32 of the optical means 30 should have a total reflection area 33 formed as a plane for total reflection of the augmented reality image light from the image output unit 10 .

When the augmented reality image light emitted from the image output unit 10 is totally reflected at least twice on the first surface 31 and the second surface 32 of the optical means 30 , the total reflection is performed on the first surface 31 ) and the second surface 32 both have a total reflection area 33 formed in a plane.

That is, the augmented reality image light emitted from the image output unit 10 is totally reflected at least once by at least one of the first surface 31 and the second surface 32 of the optical means 30 , and then the reflection unit At this time, at least one of the first surface 31 and the second surface 32 of the optical means 30 in which total reflection is made is augmented reality outputted from the image output unit 10 . It is preferable to provide a planar total reflection area 33 for total reflection of image light.

7 is a view showing the overall configuration of an optical device 500 for augmented reality having a vision correction function according to another embodiment of the present invention.

Figure 7 (a) shows a side view of the optical device 500 for augmented reality having a vision correction function according to another embodiment of the present invention, Figure 7 (b) is for comparison with this embodiment It shows a side view of the optical apparatus 100 for augmented reality of the prior art as described in patent document 1.

The embodiment shown in (a) of FIG. 7 shows a case in which the second surface 32 is formed as a convex surface and the first surface 31 is formed as a flat surface. It is for vision correction.

That is, when the user is farsighted, according to the optical device 100 for augmented reality of FIG. 7B , as described above, since both the first surface 31 and the second surface 32 are flat, the red color Both the augmented reality image light indicated by the dotted line and the real object image light indicated by the black solid line are imaged behind the retina.

On the other hand, according to the optical device 500 for augmented reality of the embodiment of FIG. 7A , the real object image light indicated by the black solid line converges inward while passing through the second surface 32, and thereafter, the first surface It can be seen that the focal length is shortened while passing through (31) and the pupil (40), so that the image is transferred to the retina.

However, in the case of the optical device 500 for augmented reality according to the embodiment of FIG. 7A , since the first surface 31 is formed as a flat surface, a vision correction function for augmented reality image light cannot be provided. .

Accordingly, the embodiment of FIG. 7A can provide a visual acuity correction function limited only to real object image light for a far-sighted user.

When the optical devices 400 and 500 for augmented reality according to the embodiments of FIGS. 6 and 7 are used alone, it is not possible to provide a vision correction function for the augmented reality image light, but when they are used with other auxiliary optical devices, it is augmented. It is possible to provide a vision correction function for real image light. For example, the optical devices 400 and 500 for augmented reality are formed as separate lens modules and used in the form of coupling them to general glasses by means such as a clip, or the optical devices 400 and 500 for augmented reality are used in the form of glasses. Implementation and use of a separate lens module for visual acuity correction of augmented reality image light can be combined and used, so there is an advantage in that the degree of freedom in design and design can be increased.

8 is a view showing the overall configuration of an optical device 600 for augmented reality having a vision correction function according to another embodiment of the present invention.

Fig. 8 (a) is a side view of an optical device 600 for augmented reality having a vision correction function according to another embodiment of the present invention, and Fig. 8 (b) is for comparison with this embodiment. It shows a side view of the optical device 100 for augmented reality of the prior art as described in patent document 1.

In the embodiment shown in Fig. 8 (a), the first surface 31 of the optical means 30 is formed as a concave surface, and the second surface 32 is formed as a convex surface, but the second surface 32 is formed as a convex surface. By making the curvature of the first surface 31 larger than the curvature of It is for vision correction.

That is, when the user is nearsighted, according to the optical device 100 for augmented reality of FIG. 8 (b), as described above, since both the first surface 31 and the second surface 32 are flat, red Both the augmented reality image light indicated by the colored dotted line and the real object image light indicated by the black solid line are imaged in front of the retina.

On the other hand, according to the optical device 600 for augmented reality of the embodiment of FIG. 8 ( a ), as previously described in FIG. 4 ( a ), the augmented reality image light indicated by the red dotted line is displayed on the display device 11 . It is emitted and is incident on the second surface 32 of the optical means 30 through the collimator 12 , is totally reflected from the second surface 32 of the optical means 30 , and is incident on the reflector 20 , and then reflected It is reflected from the part 20 and transmitted to the pupil 40 . At this time, since the first surface 31 is formed as a concave surface, the augmented reality image light is emitted in an outward direction while passing through the first surface 31, so that the focal length becomes longer as it passes through the pupil 40, so that the retina It can be seen that it is delivered to form an award in

In addition, according to the optical device 600 for augmented reality of the embodiment of FIG. 8A , the real object image light indicated by the black solid line passes through the second surface 32 formed as a convex surface and converges slightly inward. However, while passing through the first surface 31 having a greater curvature than the curvature of the second surface 32, it diverges more in the outward direction, so that the overall focal length becomes longer as it passes through the pupil 40, so that the image is formed on the retina. It can be seen that the catalog has been delivered.

Accordingly, the embodiment of FIG. 8A may provide a visual acuity correction function for both the augmented reality image light and the real object image light for a near-sighted user. In this case, since the optical means 30 can be implemented as a spectacle lens used by real myopic users, the optical device 600 for augmented reality can be used as an augmented reality providing device in the form of glasses without a separate auxiliary optical means. have.

9 is a view showing the overall configuration of an optical device 700 for augmented reality having a vision correction function according to another embodiment of the present invention.

Figure 9 (a) shows a side view of the optical device 700 for augmented reality having a vision correction function according to another embodiment of the present invention, Figure 9 (b) is for comparison with this embodiment It shows a side view of the optical apparatus 100 for augmented reality of the prior art as described in patent document 1.

The embodiment shown in Fig. 9 (a) is similar to the embodiment of Fig. 8 (a), but the optical means 30 as a whole by forming both the first surface 31 and the second surface 32 as convex surfaces. ) is formed to act as a convex lens, and is for visual acuity correction for augmented reality image light and real object image light for a far-sighted user. Since other configurations are the same as those described in FIG. 8 , detailed descriptions thereof will be omitted.

Meanwhile, although not shown, the first surface 31 of the optical means 30 is formed as a concave surface, and the second surface 32 is formed as a convex surface, but the second surface is greater than the curvature of the first surface 31 . By increasing the curvature of 32, the optical means 30 as a whole may be made to function as a convex lens (such a lens is usually referred to as a positive meniscus lens). In this case, an eyesight correction function for real object image light may be provided to a far-sighted user, but the visual acuity correction effect for augmented reality image light is insufficient. Therefore, in this case, a function of correcting the visual acuity of the augmented reality image light is provided to the primitive user by using other components (eg, the curved structure of the reflector, the thickness or spacing of the collimator) for correcting the visual acuity of the augmented reality image light. Needs to be.

In addition to the embodiments of FIGS. 8 and 9 , various combinations in which both the first surface 31 and the second surface 32 are curved may be used. In this case, the first surface 31 and the second surface 32 are formed by a combination of a concave surface and a convex surface, but by appropriately adjusting the curvature, the optical means 30 as a whole according to whether the user is near-sighted or far-sighted. It can be made to function as a concave lens or a convex lens.

10 and 11 are views for explaining an optical device 800 for augmented reality having a vision correction function according to another embodiment of the present invention, and FIG. 10 is an overall configuration of the optical device 800 for augmented reality. is a side view showing the , and FIG. 11 is a view for explaining the configuration of the reflection units 21A and 21B.

The embodiment of FIG. 10 has the same basic configuration as the optical device 100 for augmented reality described in Patent Document 1 described with reference to FIGS. 4 to 9 , but the surfaces of the reflection units 21A and 21B are curved. There is a difference in that it is

Here, the reflective parts 21A and 21B may be formed in plural of two or more.

In addition, the surfaces of the reflection parts 21A and 21B may be formed as a convex surface or a concave surface.

In the embodiment of Fig. 10, two reflection portions 21A and 21B having a surface formed of a convex surface are formed to provide a visual acuity correction function of augmented reality image light for a user who is nearsighted.

As shown in FIG. 10 , the augmented reality image light indicated by the red dotted line is totally reflected on the second surface 32 of the optical means 30 and then is incident on the reflection units 21A and 21B, and the reflection units 21A and 21B. ) and transmitted to the pupil 40, at this time, since the reflection parts 21A and 21B are formed as convex surfaces, the augmented reality image light is directed outward by the reflection parts 21A and 21B, which are convex surfaces. It is transmitted to the pupil 40 while diverging. Accordingly, the augmented reality image light may be transmitted to form an image on the retina through the pupil 40 due to a longer focal length, thereby providing a visual acuity correction function of the augmented reality image light for a near-sighted user.

On the other hand, when the plurality of reflection units 21A and 21B is formed, the plurality of reflection units 21A and 21B is at least one of the unit reflection units obtained by dividing one reflection unit 21 having a curved surface into a plurality of units. It may consist of parts.

11 is a view for explaining the configuration of the reflection units 21A and 21B.

Referring to FIG. 11 , if one reflective means 21 having a curved surface is divided into four dotted lines as shown, three unit reflective means can be obtained.

Among them, the two reflection units 21A and 21B may be formed by using two unit reflection means, the unit reflection means 1 and the unit reflection means 3, except for the unit reflection means 2 .

11 shows a case where three unit reflection means are obtained by dividing one reflection means 21, but this is exemplary and in some cases, four, five or more unit reflection means are divided and formed, and these Of course, it is also possible to configure the reflector by using some of them.

On the other hand, as shown in Fig. 11, the reflection units 21A and 21B are divided into a plurality of unit reflection units in a state where one reflection unit 21 is placed in the front direction of the pupil 40, and among them, the reflection unit 21A , 21B) between the first surface 31 and the second surface 32 of the optical means 30 by moving the unit reflection means to be used as the first surface 31 and the second surface 32 of the optical means 30 by moving them in a direction horizontal to the front direction of the pupil 40 while maintaining their shape. It can be placed to be positioned.

At this time, the reflection portions 21A and 21B disposed between the first surface 31 and the second surface 32 of the optical means 30 are the first surface 31 and the second surface of the optical means 30 . They may be arranged parallel to the plane 32, but this is not necessarily the case, and as described above, each of the reflection units 21A and 21B is arranged to have an appropriate angle so as not to block the augmented reality image light with respect to the other reflection units. can be

12 and 13 are views for explaining an optical device 900 for augmented reality according to another embodiment of the present invention, and FIG. 12 is a side view showing the overall configuration of the optical device 900 for augmented reality, FIG. 13 is a diagram for explaining the configuration of the reflection units 22A and 22B.

The embodiments of FIGS. 12 and 13 have the same basic configuration as the embodiments described with reference to FIGS. 10 and 11 , but differ in that the surfaces of the reflection units 22A and 22B are concave.

In the embodiment of Fig. 12, two reflection portions 22A, 22B having a surface formed as a concave surface are formed, which is to provide a vision correction function of augmented reality image light for a far-sighted user.

As shown in FIG. 12 , the augmented reality image light indicated by the red dotted line is totally reflected on the second surface 32 of the optical means 30 and then is incident on the reflection units 22A and 22B, and the reflection units 22A and 22B. ) and transmitted to the pupil 40, at this time, since the reflection parts 22A and 22B are formed in a concave surface, the augmented reality image light is converged inward by the reflection parts 22A and 22B, which are concave surfaces. while being transmitted to the pupil (40). Accordingly, the augmented reality image light may be transmitted to form an image on the retina through the pupil 40 as the focal length is shortened, thereby providing a vision correction function of the augmented reality image light for a far-sighted user.

Even in this case, when a plurality of reflection units 22A and 22B are formed, the plurality of reflection units 22A and 22B are unit reflection units obtained by dividing one reflection unit 21 having a curved surface into a plurality of units. It may be composed of at least a part of

13 is a diagram for explaining the configuration of the reflection units 22A and 22B.

The configuration of the reflection units 22A and 22B of FIG. 13 is the same as that described with reference to FIG. 11 , except that the reflection units 22A and 22B are formed in a concave surface.

That is, as shown in FIG. 13, if one reflecting means 22 having a surface formed in a concave surface is divided as indicated by four dotted lines, three unit reflecting means can be obtained, and among these, unit reflecting means 2 is selected. Except for this, the two reflection units 22A and 22B may be formed by using the two unit reflection means of the unit reflection means 1 and the unit reflection means 3 .

Reflectors 22A and 22B In addition, as described in FIG. 11 , one reflection means 22 is divided into a plurality of unit reflection means in a state in which one reflection means 22 is placed in the front direction of the pupil 40, and among them, the reflection part 22A, 22B), the unit reflection means to be used as a unit is moved in a direction horizontal to the front direction of the pupil 40 while maintaining its shape and positioned between the first surface 31 and the second surface 32 of the optical means 30 can be placed to

Also in this case, the reflection portions 22A and 22B disposed between the first surface 31 and the second surface 32 of the optical means 30 are formed between the first surface 31 and the second surface of the optical means 30 . It may be arranged side by side so as to be horizontal to the two surfaces (32). Alternatively, each of the reflection units 22A and 22B may be arranged to have an appropriate angle so as not to block the augmented reality image light with respect to the other reflection units.

14 and 15 are diagrams illustrating optical apparatuses 1000 and 1100 for augmented reality according to another embodiment of the present invention.

The optical apparatuses 1000 and 1100 for augmented reality of the embodiments of FIGS. 14 and 15 have the same basic configuration as the optical apparatus 100 for augmented reality of Patent Document 1 described with reference to FIGS. 4 to 9 , but auxiliary It is characterized in that the vision correction function is provided by using the optical elements 50 and 60 .

That is, by arranging the auxiliary optical elements 50 and 60 between the image output unit 10 and the optical means 30 , the augmented reality image light emitted from the image output unit 10 is refracted and transmitted to the optical means 30 . characterized in that

Here, the auxiliary optical elements 50 and 60 may be refractive means such as a concave lens or a convex lens.

The embodiment of FIG. 14 shows a case in which a concave lens 50 is used as an auxiliary optical element, and the embodiment of FIG. 15 shows a case where a convex lens 60 is used.

As shown in FIG. 14 , when the concave lens 50 is used, the auxiliary optical element 50 refracts the augmented reality image light to diverge in an outward direction, so it is transmitted to the retina through the pupil 40 through the reflection unit 20 . It can provide a vision correction function for myopic users because the focal length is lengthened when

As shown in FIG. 15 , when the convex lens 60 is used, the auxiliary optical element 60 refracts the augmented reality image light to converge in the inward direction. When the focal length is shortened, it is possible to provide a vision correction function for hyperopia users.

On the other hand, as the auxiliary optical elements 50 and 60, in addition to refraction means such as a concave lens or a convex lens, an optical element such as a diffraction means or a hologram element may be used.

Meanwhile, by adjusting the distance between the display device 11 and the collimator 12 or using the collimator 12 having a different focal length, a vision correction function for the augmented reality image light may be obtained.

16 is a view for explaining the vision correction function using the collimators 12A and 12B.

As shown in (a) and (b) of Figure 16, if the focal length is different by forming the collimator 12A to be thin or thick, the augmented reality image light can be refracted to diverge or converge, so it is augmented for myopic or far-sighted users. This shows the principle of providing the visual acuity correction function of real image light.

In addition, as shown, by changing the distance between the display device 11 and the collimators 12A, 12B, the augmented reality image light is transmitted to the optical means 30 by changing the optical path, it is possible to provide a vision correction function. have.

A method of varying the focal length of the collimators 12A and 12B and a method of varying the distance between the display device 11 and the collimators 12A and 12B may be used in combination with each other.

Also, the configuration described with reference to FIG. 16 may be used in combination with the embodiments described with reference to FIGS. 14 and 15 .

Meanwhile, the embodiments described with reference to FIGS. 4 to 16 may be used in combination with each other.

17 and 18 show optical apparatuses 1200 and 1300 for augmented reality according to another embodiment of the present invention, and exemplarily shows a case in which the embodiments of FIGS. 4 to 16 are used in combination.

The embodiment of FIG. 17 shows an optical device 1200 for augmented reality to which the embodiment of FIG. 6 and the embodiment of FIG. 10 are applied in combination.

That is, the optical device 1200 for augmented reality of the embodiment of FIG. 17 provides a myopia correction function for real object image light by forming the second surface 32 as a concave surface as in the embodiment of FIG. 6 , and FIG. As in the 10th embodiment, it is possible to provide the myopia correction function for the augmented reality image light by disposing the reflective parts 21A and 21B having a convex surface.

Meanwhile, the embodiment of FIG. 18 shows an optical device 1300 for augmented reality to which the embodiment of FIG. 8 and the embodiment of FIG. 10 are applied in combination.

That is, in the embodiment of FIG. 18 , as in the embodiment of FIG. 8 , the first surface 31 of the optical means 30 is formed as a concave surface and the second surface 32 is formed as a convex surface, but the second surface By making the curvature of the first surface 31 larger than the curvature of 32, the optical means 30 as a whole plays the role of a concave lens, so that the visual acuity correction function for augmented reality image light and real object image light for myopic users provides In addition, as in the embodiment of FIG. 10 , it is possible to additionally provide a visual acuity correction function of augmented reality image light for a myopic user by disposing the reflectors 21A and 21B having a convex surface.

17 and 18 are exemplary, and in addition to these embodiments, by combining the embodiments of FIGS. 4 to 16 in various ways, it is possible to provide a complex vision correction function according to usage examples.

In the above, the present invention has been described with reference to the preferred embodiment according to the present invention, but it should be noted that the present invention is not limited to the above embodiment, and various modifications and variations are possible within the scope of the present invention. Should be.

100...Conventional optics for augmented reality
200 to 1300...Optical devices for augmented reality that provide vision correction
10...image exit
20...reflectors
21A, 21B...Reflector
22A, 22B...Reflector
30...optical means
31...Page 1
32...Second side
33...Total reflection area
40...pupil
50, 60...Auxiliary optical element

Claims (6)

An optical device for augmented reality having a vision correction function, comprising:
an image output unit emitting an augmented reality image light that is image light corresponding to an image for augmented reality;
a reflection unit providing an image for augmented reality to the user by reflecting and transmitting the augmented reality image light emitted from the image output unit toward the pupil of the user's eyes; and
Optical means for transmitting at least a portion of the real object image light, which is the image light emitted from the real object, toward the pupil of the user's eye, in which the reflection unit is disposed
including,
An optical device for augmented reality having a vision correction function, characterized in that the surface of the reflector is formed in a curved surface. The method according to claim 1,
An optical device for augmented reality having a vision correction function, characterized in that the surface of the reflection unit is a concave surface or a convex surface. The method according to claim 1,
The reflector is formed in plurality,
The plurality of reflection units is an optical device for augmented reality having a vision correction function, characterized in that it is composed of at least a portion of the unit reflection unit divided into a plurality of reflection units having a surface formed in a curved surface. 4. The method according to claim 3,
The plurality of reflection units are divided into a plurality of unit reflection units in a state where one reflection unit is placed in the frontal direction of the pupil, and among them, the unit reflection unit to be used as the reflection unit maintains its shape in a direction parallel to the pupil front direction. An optical device for augmented reality having a vision correction function, characterized in that it is moved to be positioned between the first surface and the second surface of the optical means. The method according to claim 1,
The optical means includes a first surface through which at least a portion of the augmented reality image light reflected by the reflector and the real object image light is emitted toward the user's pupil, and the first surface is opposite to the first surface and the real object image light is incident having a second side;
The reflection unit is disposed inside between the first surface and the second surface of the optical means,
At least one of the first surface and the second surface of the optical means is an optical device for augmented reality having a vision correction function, characterized in that the curved surface is formed. 6. The method according to claim 1 or 5,
Augmented reality image light emitted from the image output unit is an optical device for augmented reality having a vision correction function, characterized in that transmitted to the reflection unit through the auxiliary optical element.

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