CN108681073A - A kind of augmented reality optical presentation system - Google Patents

Abstract

A kind of augmented reality optical presentation system, including light source, the first optical texture, the second optical texture, third optical texture and the 4th optical texture, first optical texture carry out the correction curvature of field to the light of light source image and distortion are handled；The incident light is become circularly polarized light and is reflected into the third optical texture, and the second reflected light of reception is transmitted to human eye by second optical texture；The third optical texture receives the circularly polarized light, and by the second reflected light back to second optical texture, by leakage light transmission to the 4th optical texture；4th optical texture absorbs the leakage light, avoids the privacy exposure problem that user watches content.The augmented reality optical presentation system of the present invention, modular volume and weight is small, good imaging quality, aberration is small；Without display light leakage, good confidentiality；It supports near-sighted user's bore hole viewing, is not necessarily to additional concave lens.

Description

An augmented reality optical display system

technical field

The invention relates to the field of augmented reality technology, in particular to an augmented reality optical display system.

Background technique

One of the core technologies in the field of Augmented Reality (AR, Augmented Reality) is a penetrating optical display system, which can superimpose computer-generated images on the user's real vision, and seamlessly blend virtual images and real images. The combination of the digital world and the real world will bring users a new experience. At present, AR technology has been widely used in games, retail, education, industry and medical fields.

At present, augmented reality technology usually adopts transmissive optical display methods, including solutions such as holographic gratings, reflective waveguides, ordinary reflective prisms and free-form surface prisms. These solutions generally have problems of poor image quality and display leakage. In addition, for myopia users, these optical systems also add the user's myopia lenses, which increases the complexity of the system and reduces the wearing experience.

Contents of the invention

In order to solve the shortcomings of the existing technology, the object of the present invention is to provide an augmented reality optical display system, which uses Mankin catadioptric system, combined with a specific compensation mirror, and controls the imaging of virtual digital images with a highly integrated solution The distance improves the quality of the virtual digital image, and at the same time presents a certain focal power to the outside world through the real light field, ensuring that myopia users can see the digital image and the real world clearly at the same time.

To achieve the above object, the augmented reality optical display system provided by the present invention includes a light source, a first optical structure, a second optical structure, a third optical structure, and a fourth optical structure, and is characterized in that,

The first optical structure corrects the field curvature and distorts the light of the light source image;

The second optical structure, which changes the incident light into circularly polarized light and reflects it to the third optical structure, and transmits the received second reflected light to human eyes;

the third optical structure, which receives the circularly polarized light, reflects the second reflected light to the second optical structure, and transmits the leaked light to the fourth optical structure;

The fourth optical structure absorbs the leaked light, avoids the privacy exposure of users watching content, and reduces the impact on users observing external brightness by eliminating the reflection loss of air and medium surfaces.

Further, the first optical structure includes a first optical lens, and the upper and lower surfaces of the first optical lens are respectively coated with an anti-reflection optical film.

Further, the second optical structure includes a second optical plate, on the upper surface of the second optical plate, an absorbing linear polarizing film, a polarizing reflective film and a first quarter A wave plate; an anti-reflection optical film is attached or coated on the lower surface of the second optical plate.

Further, the second optical plate is a thin optical plate, and the two-sided surface is: plane, spherical, aspheric or free-form.

Further, it is characterized in that,

The absorbing linear polarizing film is used to absorb the first polarized light;

The polarizing reflective film is used to reflect the first polarized light;

The first quarter-wave plate changes the first polarized light into circularly polarized light;

The first polarized light is S light or P light.

Further, the third optical structure includes a Mankin mirror and a compensation mirror, and the Mankin mirror and the compensation mirror are glued together to form the surfaces of S1, S2 and S3; the S2 surface is plated Partially transmissive and partly reflective film; the surfaces of S1 and S3 are laminated or coated with anti-reflection optical film.

Further, the S1 and S2 surface profiles are set to reduce imaging spherical aberration, thereby improving the image quality and the clarity of watching digital content; designing the S1, S2, and S3 surface profiles to realize the virtual image formed by reflection in The specific position allows ordinary or nearsighted users to see clearly with naked eyes, and at the same time has no focal power for the transmitted light field or has the same refractive power as the lens for myopic users, so that ordinary or nearsighted users can see the real scene of transmission with naked eyes.

Further, the fourth optical structure includes a third optical plate, which is laminated or coated with an anti-reflection optical film on one side of the third optical plate, and is sequentially pasted on the other side of the third optical plate. Composite linear polarizer, second quarter wave plate, and AR optical coating.

Further, the directions of the fast and slow axes of the first quarter-wave plate and the second quarter-wave plate are consistent, and form an angle of 45 degrees with the polarization direction of the first polarized light; the absorption of the linear polarizer The axial direction is the polarization direction of the second polarized light; the second polarized light is S light or P light.

Furthermore, the distance between the light source and the first optical structure is adjusted manually or electrically.

The augmented reality optical display system of the present invention adopts a Mankin catadioptric system, a specific compensation mirror and a display system fine-tuning device, and has the following technical effects: 1) The volume and weight of the module are reduced; 2) The imaging quality is good and the aberration is small ;3) No display light leakage, good confidentiality; 4) For myopia users, there is no need for additional myopia lenses.

In the augmented reality optical display system of the present invention, the Mankin mirror is aplanatic to improve clarity; the curved surface design of the Mankin mirror makes the position of the digital virtual image within the clear range of the myopic user; the compensation mirror design of the Mankin mirror makes the two After the combination of the two, it presents a specific focal power, so that the whole plays the role of myopia lens for the transmitted light, so that the myopia user can see the real world outside; through the specific optical components, the display light leakage is eliminated; manual or electric adjustment of the display system The distance from the scene is used to further adjust the position of the virtual image to meet the long-term adjustment needs of myopic users.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the description, and together with the embodiments of the present invention, are used to explain the present invention, and do not constitute a limitation to the present invention. In the attached picture:

Fig. 1 is a schematic structural diagram of an augmented reality optical display system according to the present invention.

Detailed ways

The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

Hereinafter, the first polarized light is S light, and the second polarized light is P light; it is also possible that the first polarized light is P light, and the second polarized light is S light.

Fig. 1 is a schematic structural diagram of an augmented reality optical display system according to the present invention. As shown in Fig. 1, the augmented reality optical display system of the present invention includes a light source 1, a first optical structure 2, a second optical structure 3, a third optical Structure 4, and a fourth optical structure 5, wherein,

The light source 1 is an OLED or LED display screen.

The first optical structure 2 is a field lens system, its function is to perform preliminary processing on the light of the light source image, and correct field curvature and distortion

The first optical structure 2 of the present invention includes a first optical lens 21, and the upper and lower surfaces of the first optical lens 21 are coated with anti-reflection optical films 22 and 23 respectively.

The second optical structure 3, which converts the transmitted light of the first optical structure 2 into circularly polarized light 305 and reflects it to the third optical structure 4, and changes the second reflected light 401 emitted by the third optical structure 4 into a second polarized light Projected to the human eye.

The second optical structure 3 of the present invention includes a second optical plate 31, an absorbing linear polarizing film 32, a polarizing reflective film 33, a first quarter-wave plate 34, and an antireflection optical film 35;

The second optical plate 31 is a thin optical plate, and the two-sided surface can be flat, spherical, aspherical or free-form;

On the upper surface of the second optical plate 31, from the bottom surface, the absorption type linear polarizing film 32, the polarizing reflection film 33 and the first quarter-wave plate 34 are bonded successively, and the first quarter-wave plate 34 is a wide-band quad One-half wave plate; the lower surface of the second optical plate 31 is attached or coated with an anti-reflection optical film 35;

The absorbing linear polarizing film 32 is to prevent the external ambient light from below from being directly reflected on the polarizing reflective film 33 to human eyes, causing image interference. The absorbing linear polarizing film 32 can absorb the first polarized light.

The third optical structure 4 receives the circularly polarized light 305 emitted by the second optical structure 3 , reflects the second reflected light 401 to the second optical structure 3 , and transmits the leaked light 501 to the fourth optical structure 5 .

The third optical structure 4 of the present invention comprises Mankin reflector 42 and compensation mirror 43, and the S1 surface of Mankin reflector 42 is coated with a partial transmission and partial reflection film; Mankin reflector 42 and compensation mirror 43 are glued on Together; the anti-reflection optical films 41 and 44 are respectively located on the S1 and S3 surfaces.

Set the surface profiles of S1 and S2 to reduce the spherical aberration of imaging, thereby improving the image quality and improving the clarity of watching digital content; designing the surface profiles of S1, S2, and S3 to realize the virtual image formed by reflection at a specific position, Normal or myopic users can see clearly with naked eyes, and at the same time, there is no focal power for the transmitted light field or the same focal power as the lens for myopic users, so that normal or nearsighted users can see the real scene of transmission with naked eyes.

The fourth optical structure 5 is used to absorb the leaked light 501 transmitted by the third optical structure 4, avoiding the privacy exposure problem of the user watching the content, and reducing the reflection loss of the user observing the outside world by eliminating the reflection loss of the air and the surface of the medium. The effect of brightness. The fourth optical structure 5 of the present invention includes a third optical plate 51, a linear polarizer 52, a second quarter-wave plate 53, and antireflection optical films 54 and 55, wherein,

One side of the third optical plate 51 is pasted or coated with an anti-reflection optical film 54; on the other side of the third optical plate 51, a linear polarizer 52, a second quarter wave plate 53 and an anti-reflection film 53 are sequentially pasted Optically transparent film 55 .

Reasonably setting the direction of the fast and slow axes of the second quarter-wave plate 53 and the direction of the absorption axis of the linear polarizer 52 can realize the absorption of leaked light, and at the same time, have little effect on the brightness of the external world observed by the user.

The directions of the fast and slow axes of the first quarter-wave plate 34 and the second quarter-wave plate 53 are consistent, and the directions of the fast axes are both at an angle of 45 degrees to the polarization direction of the first polarized light. The 52 absorption axis direction of the linear polarizer is its second polarized light polarization direction. At the same time, anti-reflection optical films 54 and 55 can be added on the surface of the fourth optical structure 5 to eliminate the reflection loss of the air and the surface of the medium.

Investigate whether this method will prevent users from viewing external information. The unpolarized light incident in the external environment, the first polarized light remains after passing through the linear polarizer 52, and the first polarized light passes through the second quarter-wave plate 53 to become circularly polarized light, passes through S2, and is partially transmitted to reach the second optical structure 3. Pass through the quarter-wave plate 34 first to become the second polarized light. Since the polarized reflective film 33 transmits the second polarized light, the light is transmitted out and reaches the human eye smoothly.

The working principle of the augmented reality optical display system of the present invention will be described below.

The unpolarized light 101 emitted from the light source 1 passes through the first optical structure 2 for field curvature correction, reduces the distortion and forms the incident light 201, reaches the second optical structure 3, passes through the quarter-wave plate film 34, and undergoes polarization reflection At the film 33, the first polarized light is reflected; the reflected first polarized light passes through the quarter-wave plate film 34 and becomes circularly polarized light 301; the circularly polarized light 301 reaches the S2 surface of the third optical structure 4 The second reflected light 401 is formed after partial reflection; the second reflected light 401 passes through the quarter-wave plate film 34 of the second optical structure 3 again, becomes the second polarized light, and transmits to the human eye after passing through the polarized reflective film 33 , forming a digital virtual image at a specific position and a specific magnification.

By properly setting the S1 and S2 surface parameters (curvature radius) of the Mankin reflector 42, the imaging spherical aberration can be greatly reduced, thereby improving the image quality and improving the clarity of viewing digital content.

At the same time, the position of the formed virtual image can also be controlled. For example, a user with 200 degrees of myopia can see clearly at a distance of 0.25-0.5m, so the virtual image position can be set at 0.5m to ensure that they can see clearly.

In addition, on the basis of the above, a mechanical manual or electric fine-tuning mechanism can also be added to control the distance of the virtual image by adjusting the distance between the light source 1 and the first optical structure 2, so as to better adapt to changes in the myopia of myopic users. Ultimately, nearsighted users can see digital images clearly.

After the compensating mirror 43 is combined with the Mankin reflector 42, by rationally designing the surface parameters of S1, S2 and S3, the effect of no focal power or specific focal power can be realized for the transmitted light field. For myopic users, the overall focal power can be designed to be consistent with the focal power of their myopic lenses, so users can see clearly the real world outside through the optical system of this design.

The reasonable setting of the surface parameters of the Mankin mirror 42 and the compensating mirror 43 above can enable myopic users to see the digital world and the real world clearly at the same time without additional myopic lenses. Combined with the fine-tuning of the light source, the range of suitable myopia can be further improved, ensuring long-term wearing of myopia users.

In order to avoid the problem of display leakage, a fourth optical structure 5 is introduced. The circularly polarized light is partially reflected and partially transmitted through the surface S2 , and a considerable proportion of the light is transmitted to form leaked light 501 . Leaked light 501 is an enlarged image of the micro-display, which can be clearly seen by the outside world. If the user wears the near-eye display system to watch some private content, there will be a problem of information leakage, so the fourth optical structure 5 is introduced.

51 is an optical thin plate, on which a linear polarizer 52 and a second quarter wave plate 53 are placed. Reasonably setting the direction of the fast and slow axes of the second quarter-wave plate 53 and the direction of the absorption axis of the linear polarizer 52 can realize the absorption of leaked light, and at the same time, have little effect on the brightness of the external world observed by the user.

The directions of the fast and slow axes of the first quarter-wave plate 34 and the second quarter-wave plate 53 are consistent, and the directions of the fast axes are both at an angle of 45 degrees to the polarization direction of the first polarized light. The 52 absorption axis direction of the linear polarizer is its second polarized light polarization direction. At the same time, anti-reflection optical films 54 and 55 can be added on the surface of the fourth optical structure 5 to eliminate the reflection loss of the air and the surface of the medium.

The unpolarized light incident in the external environment, the first polarized light remains after passing through the linear polarizer 52, and the first polarized light passes through the second quarter-wave plate 53 to become circularly polarized light, passes through S2, and is partially transmitted to reach the second optical structure 3. Pass through the quarter-wave plate 34 first to become the second polarized light. Since the polarized reflective film 33 transmits the second polarized light, the light is transmitted out and reaches the human eye smoothly.

Those of ordinary skill in the art can understand that: the above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. a kind of augmented reality optical presentation system, including, light source, the first optical texture, the second optical texture, third optics knot Structure and the 4th optical texture, which is characterized in that

First optical texture carries out the correction curvature of field to the light of light source image and distortion is handled；

The incident light is become circularly polarized light and is reflected into the third optical texture, and will connect by second optical texture The second reflected light received is transmitted to human eye；

The third optical texture, receives the circularly polarized light, and by the second reflected light back to second optical texture, Light transmission will be revealed to the 4th optical texture；

4th optical texture absorbs the leakage light, and user is avoided to watch the privacy exposure problem of content, and The reflection loss of air and dielectric surface is eliminated, the influence for observing user ambient light is reduced.

2. augmented reality optical presentation system according to claim 1, which is characterized in that first optical texture, packet It includes, the first optical mirror slip, on the upper and lower surface of first optical mirror slip, is coated with anti-reflection optical film respectively.

3. augmented reality optical presentation system according to claim 2, which is characterized in that second optical texture, packet It includes, the second optical sheet, in the upper surface of second optical sheet, absorption-type linear polarization film, polarization is fitted with successively from most bottom surface Reflectance coating and the first quarter-wave plate；Anti-reflection optical film is attached or is coated in the lower surface of second optical sheet.

4. augmented reality optical presentation system according to claim 3, which is characterized in that second optical sheet is glimmer Learn plate, two sides face type is：Plane, spherical surface, aspherical or free form surface.

5. augmented reality optical presentation system according to claim 3, which is characterized in that

The absorption-type linear polarization film is for absorbing the first polarised light；

The reflection of polarization film is for reflecting the first polarised light；

First polarised light is become circularly polarized light by first quarter-wave plate；

First polarised light is S light or P light.

6. augmented reality optical presentation system according to claim 3, which is characterized in that the third optical texture, packet It includes, graceful gold speculum, compensating glass, the graceful golden speculum and the compensating glass rear surfaces formation S1, S2 and S3 glued together； Fractional transmission part reflectance coating is coated on the surfaces S2；It is bonded or is coated with respectively anti-reflection optical film on the surfaces S1 and S3.

7. augmented reality optical presentation system according to claim 6, which is characterized in that the surfaces S1 and S2 face is arranged Type reduces imaging spherical aberration, to improve image quality, improves the clarity of viewing digital content；Design the S1, the surfaces S2 and S3 face Type is realized for reflection institute into the virtual image in specific position so that common or near-sighted user's bore hole can be it is clear that simultaneously for saturating Penetrate light field has identical focal power that common or near-sighted user's bore hole can be seen clearly without focal power or with near-sighted user's eyeglass The real scene of transmission.

8. augmented reality optical presentation system according to claim 6, which is characterized in that the 4th optical texture, packet It includes, third optical sheet, be bonded in the side of the third optical sheet or be coated with anti-reflection optical film, in the another of the third optical sheet Side is bonded linear polarizer plate, the second quarter-wave plate and anti-reflection optical film successively.

9. augmented reality optical presentation system according to claim 8, which is characterized in that first quarter-wave plate It is consistent with the speed axis direction of the second quarter-wave plate, and with the polarization direction of the first polarised light at 45 degree of angles；It is described linear The absorption axis direction of polaroid is its second polarization light polarization direction；Second polarised light is S light or P light.

10. augmented reality optical presentation system according to claim 1, which is characterized in that the light source and described first The distance between optical texture manually or electrically is adjusted.