CN213986900U - AR optical prism and AR display device - Google Patents
AR optical prism and AR display device Download PDFInfo
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- CN213986900U CN213986900U CN202022838895.XU CN202022838895U CN213986900U CN 213986900 U CN213986900 U CN 213986900U CN 202022838895 U CN202022838895 U CN 202022838895U CN 213986900 U CN213986900 U CN 213986900U
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Abstract
The utility model provides an AR optical prism and AR optical equipment, wherein the AR optical prism comprises a special-shaped prism and a triangular prism; the special-shaped prism comprises an incident surface, a spherical surface and an inclined surface, and one inclined surface of the triangular prism is arranged in parallel with the inclined surface; an external light source enters the special-shaped prism from the incident surface and is reflected to the spherical surface through the inclined surface to form reflected light; the reflected light enters the triangular prism through the inclined surface and is emitted from the triangular prism, and the emitted light corresponding to the light source is formed. Utilize above-mentioned utility model can improve AR optical system like the matter, simple structure, manufacturing convenience, and image effect is good.
Description
Technical Field
The utility model relates to an optics technical field, more specifically relates to an AR optical prism and be provided with AR display device of this AR optical prism.
Background
The AR technology is an augmented reality technology, which is a technology that uses a virtual technology in reality to present a virtual screen in reality and can operate on the virtual screen. The AR optical prism is used as an important component in AR glasses and plays a role in connecting objects in the virtual world with human perception; it can be known that the quality of the AR optical prism often directly affects the actual experience of the user.
At present, the existing AR prism has poor illumination reflection performance, so that the object image forming effect is not ideal, and the actual requirements of users cannot be well met; in addition, the conventional one-piece optical prism has the defects of great difficulty in production and assembly processes due to the special surface shape and structure, high cost and unsuitability for mass production.
According to the development trend of optical path schemes of AR glasses, the optical path of an optical prism is mainly projected to a small prism with a cutting reflection surface for imaging, and on the propagation path of light, the optical path mainly adopts a semi-transparent semi-reflection plane, and for the semi-transparent semi-reflection plane, the transmissivity and the reflectivity of a film are respectively 50%. After light passes through the film, the transmitted light intensity and the reflected light intensity respectively account for 50 percent, but the transmittance and the reflectivity of the film are less than 50 percent due to factors such as refraction, reflection, diffraction or coating of film materials, and the influence of problems such as stray light of the whole light path, and finally the loss of the light path is increased due to multiple reflection and refraction, so that the actual requirement of the light path cannot be met; in addition, the one-piece special-shaped prism is used as a reflection product, although the risk of low transmissivity and reflectivity in an optical path can be reduced, the manufacturing of the special-shaped prism has certain difficulty for molding and assembling processes, so that the product is low in assembling precision and high in cost.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, an object of the present invention is to provide an AR optical prism and an AR display device, so as to solve the problems of low precision, difficult molding and assembling process, and unsuitability for mass production of the existing AR optical prism.
The utility model provides an AR optical prism, which comprises a special-shaped prism and a triangular prism; the special-shaped prism comprises an incident surface, a spherical surface and an inclined surface, and one inclined surface of the triangular prism is arranged in parallel with the inclined surface; an external light source enters the special-shaped prism from the incident surface and is reflected to the spherical surface through the inclined surface to form reflected light; the reflected light enters the triangular prism through the inclined surface and is emitted from the triangular prism, and the emitted light corresponding to the light source is formed.
In addition, it is preferable that AR films are provided on the incident surface and the inclined surface, respectively, and a high reflection film is provided on the spherical surface.
In addition, the preferable structure is that the reflectance of each of the special-shaped prisms and the triangular prisms is less than 1%.
In addition, the curvature radius of the spherical surface is preferably in the range of 20mm to 25 mm.
In addition, it is preferable that an antireflection film is provided on each inclined surface of the triangular prism.
In addition, it is preferable that the incident light from the light source entering the incident surface and the corresponding outgoing light are parallel to each other.
Further, it is preferable that the triangular prism is a right-angle triangular prism; and the inclined plane of the special-shaped prism and the inclined plane of the right-angle triangular prism are arranged in parallel.
In addition, it is preferable that the inclined surface of the triangular prism is fixed to the inclined surface by gluing.
On the other hand, the utility model also provides an AR display device, including AR optical prism, first composite prism and the second composite prism that sets gradually, AR optical prism is as shown above; wherein the first combined prism comprises a biconvex lens and a double cemented prism; the second combined prism comprises a light source and a triangular prism arranged on one side of the light source; light emitted by the light source is reflected into the first combined prism after passing through the triangular prism, and enters the AR optical prism after passing through the first combined prism; and combining and outputting the virtual image and the real image corresponding to the light source through the AR optical prism.
Further, it is preferable that the AR optical prism, the first combined prism, and the second combined prism have an overall focal length ranging from 10.5mm to 11.5 mm.
According to the above technical solution, the AR optical prism and the AR display device of the present invention are provided with the special-shaped prism and the triangular prism which are combined with each other; the special-shaped prism comprises an incident surface, a spherical surface and an inclined surface, wherein the inclined surface and the inclined surface of the triangular prism are arranged in parallel, an external light source enters the special-shaped prism from the incident surface and is reflected to the spherical surface through the inclined surface to form reflected light, the reflected light enters the triangular prism through the inclined surface and is emitted out of the triangular prism to form emergent light corresponding to the light source, and the special-shaped prism is simple in structure, small in size, high in imaging quality and wide in application range.
Drawings
Other objects and results of the invention will be more apparent and readily appreciated by reference to the following description taken in conjunction with the accompanying drawings, and as the invention is more fully understood. In the drawings:
fig. 1 is a block diagram of an AR optical prism according to an embodiment of the present invention;
fig. 2 is a block diagram of an AR optical device according to an embodiment of the present invention.
Wherein the reference numerals include: the light source comprises a special-shaped prism 1, an incident surface 11, an inclined surface 12, a spherical surface 13, a triangular prism 2, an inclined surface 21 of a right-angle triangular prism, an AR optical prism I, a first combined prism II, a second combined prism III, a light source 3, a triangular prism 4, a double-cemented prism 5 and a double-convex lens 6.
The same reference numbers in all figures indicate similar or corresponding features or functions.
Detailed Description
For the detailed description of the AR optical prism and the AR display device of the present invention, the detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.
Fig. 1 shows a schematic structure of an AR optical prism according to an embodiment of the present invention.
As shown in fig. 1, the AR optical prism of the embodiment of the present invention includes a special-shaped prism 1 and a triangular prism 2 that are combined with each other; the special-shaped prism 1 comprises an incidence plane 11, a spherical surface 13 and an inclined plane 12, wherein one inclined plane of the triangular prism 2 is arranged in parallel with the inclined plane 12, and an external light source enters the special-shaped prism 1 from the incidence plane 11 and is reflected to the spherical surface 13 through the inclined plane 12 to form reflected light; the reflected light enters the triangular prism 2 through the inclined surface 12 and is emitted from the triangular prism 2 to form emergent light parallel to the incident light corresponding to the light source, the whole light path loss is small, the production and assembly processes of the AR optical prism are easy, and the mass production performance is high.
Specifically, the incident surface 11 is a surface a shown in the drawing, the spherical surface 13 is a surface C, the inclined surface 12 is a surface B, and the inclined surface of the triangular prism 2 includes a surface D, a surface E and a surface F; the D surface of the triangular prism 2 and the B surface of the special-shaped prism 1 are parallel to each other, and the two can be fixed by adopting fixation and gluing. The bonding surface has the function of light transmission, and can avoid overlarge volume of the AR optical prism, so that the whole prism structure is more compact and more portable.
Wherein, for avoiding the light of present semi-transparent half reflection plane's prism side on the light path to reduce, lead to the risk that transmissivity and reflectivity are low in the light path, also for avoiding the preparation of abnormal shape prism to shaping and assembly process's difficulty the utility model discloses an among the AR optical prism, set up abnormal shape prism 1 into the structure that has an inclined plane 12, a sphere 13 and an incident plane 11, and triangle prism 2 can adopt right angle triangle prism to, the inclined plane 12 of abnormal shape prism 1 and the inclined plane 21 mutual parallel arrangement of right angle triangle prism.
Furthermore, the incident surface 11 and the inclined surface 12 are respectively provided with an AR film, and the spherical surface 13 is provided with a high-reflection film, namely a film with high reflectivity, so that the reflection efficiency of the C surface is improved, and more than 90% of light reaching the C surface can be reflected back; in addition, a scratch-resistant component can be added into the high-reflection film, so that the AR optical prism is prevented from being scratched in the assembling process, and the imaging precision is ensured. In addition, the AR films on the A surface and the B surface can also be understood as an increase projection film, the transmittance of the film layer is more than 99%, the loss of the whole optical path is ensured to be small, and the high optical path requirement can be met.
In a specific embodiment of the present invention, the special-shaped prism 1 can adopt a machine component made of OKP1, the triangular prism 2 can adopt a structural component made of H-ZF6, and the reflectivity of the special-shaped prism 1 and the reflectivity of the triangular prism 2 are both less than 1%; in addition, the curvature radius range of the spherical surface 13 of the special-shaped prism 1 can be set to be 20-25 mm, the AR optical prism with the structure can effectively reduce abrasion and assembly errors in the assembly process, and is high in optical precision and good in imaging quality.
Similarly, antireflection films may be disposed on each inclined plane of the triangular prism 2, that is, the E plane, the D plane, and the F plane, and the AR film may be used as the projection increasing film.
Corresponding with above-mentioned AR optical prism, the utility model discloses still provide an AR display device.
Specifically, fig. 2 shows a schematic structure of an AR display device according to an embodiment of the present invention.
As shown in fig. 2, the AR display device of the embodiment of the present invention includes an AR optical prism I, a first combination prism II, and a second combination prism III, which are sequentially disposed, and the AR optical prism is as shown in the above embodiment; wherein, the first combined prism II comprises a biconvex lens 6 and a double cemented prism 5; the second combined prism III comprises a light source 3 and a triangular prism 4 arranged on one side of the light source 3; light emitted by the light source 3 is reflected into the first combined prism II after passing through the triangular prism 4, and enters the AR optical prism I after passing through the first combined prism II; the virtual image and the real image corresponding to the light source 3 are combined and output through the AR optical prism I.
The light emitted by the light source 3 is reflected by the triple prism 4, the reflected light is output from the triple prism 4 and then passes through the double-cemented prism 5, the double-cemented prism can correct paraxial spherical aberration and chromatic aberration, and the double-cemented prism comprises two lenses with larger dispersion coefficient difference, so that chromatic aberration correction can be better carried out; light through two cemented lens further gets into lenticular 6, can reduce the whole focus of equipment through lenticular 6, can also increase the angle of whole visual field, and then realizes better visual effect, and light through behind the lenticular 6 jets out through AR optical prism I, forms virtual reality's image.
Specifically, on the bonding surface of the special-shaped prism and the triangular prism of the AR optical prism I, the virtual reality image light which is reflected and the real image light which is transmitted are combined and emitted through the special-shaped prism, so that an imaging effect of virtual-real combination is formed.
The utility model discloses an among the concrete embodiment, AR optical equipment's whole focal length scope, AR optical prism, first composite prism II and second composite prism III's whole focal length scope can set up to 10.5mm ~ 11.5mm promptly, specifically can set up and adjust according to application scene and demand.
According to the above embodiment, the utility model provides a AR optical prism and AR display device, set up the special-shaped prism and the triangular prism of mutual veneer, special-shaped prism includes the incident surface, sphere and inclined plane, external light source gets into special-shaped prism from the incident surface, and reflect to the sphere through the inclined plane, form the reverberation, the reverberation passes through in the inclined plane gets into triangular prism, and jet out from triangular prism, form the emergent light that parallels with the incident light that the light source formed, and then form the object image, the device overall structure is simple, small, the imaging quality is high, and applicable wide range.
The AR optical prism and the AR display device according to the present invention have been described above by way of example with reference to the accompanying drawings. However, it should be understood by those skilled in the art that various modifications may be made to the AR optical prism and the AR display device provided in the present invention without departing from the scope of the present invention. Therefore, the scope of the present invention should be determined by the content of the appended claims.
Claims (10)
1. An AR optical prism is characterized by comprising a special-shaped prism and a triangular prism; wherein the content of the first and second substances,
the special-shaped prism comprises an incident surface, a spherical surface and an inclined surface, and one inclined surface of the triangular prism is arranged in parallel with the inclined surface;
an external light source enters the special-shaped prism from the incident surface and is reflected to the spherical surface through the inclined surface to form reflected light;
the reflected light enters the triangular prism through the inclined surface and is emitted out of the triangular prism to form emergent light corresponding to the light source.
2. The AR optical prism of claim 1,
AR films are respectively arranged on the incident surface and the inclined surface, and a high reflection film is arranged on the spherical surface.
3. The AR optical prism of claim 1,
the reflectivity of the special-shaped prism and the reflectivity of the triangular prism are both less than 1%.
4. The AR optical prism of claim 1,
the curvature radius of the spherical surface ranges from 20mm to 25 mm.
5. The AR optical prism of claim 1,
and each inclined plane of the triangular prism is provided with an antireflection film.
6. The AR optical prism of claim 1,
the incident light of the light source entering the incident surface is parallel to the corresponding emergent light.
7. The AR optical prism of claim 1,
the triangular prism is a right-angle triangular prism; and the number of the first and second electrodes,
the inclined plane of the special-shaped prism and the inclined plane of the right-angle triangular prism are arranged in parallel.
8. The AR optical prism of claim 7,
the inclined plane of the triangular prism is fixedly glued with the inclined plane.
9. An AR display device comprising an AR optical prism, a first combining prism and a second combining prism arranged in this order, the AR optical prism being as defined in any one of claims 1 to 8; wherein the first combined prism comprises a lenticular lens and a double cemented prism;
the second combined prism comprises a light source and a triangular prism arranged on one side of the light source;
the light emitted by the light source is reflected into the first combined prism after passing through the triangular prism, and enters the AR optical prism after passing through the first combined prism;
and combining and outputting the virtual image and the real image corresponding to the light source through the AR optical prism.
10. The AR display device of claim 9,
the integral focal length range of the AR optical prism, the first combined prism and the second combined prism is 10.5 mm-11.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022838895.XU CN213986900U (en) | 2020-11-30 | 2020-11-30 | AR optical prism and AR display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022838895.XU CN213986900U (en) | 2020-11-30 | 2020-11-30 | AR optical prism and AR display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213986900U true CN213986900U (en) | 2021-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022838895.XU Active CN213986900U (en) | 2020-11-30 | 2020-11-30 | AR optical prism and AR display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213986900U (en) |
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- 2020-11-30 CN CN202022838895.XU patent/CN213986900U/en active Active
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