CN111273448A - A Novel AR Display Optical System - Google Patents

Abstract

The present invention relates to the field of AR technology, in particular to a novel AR display optical system, comprising an illumination component for emitting illumination light, a reflective micro-display component with dual image sources, a first polarizing component, an imaging component for projecting an image, and an image The polarized light splitting steering assembly, the illumination light emitted by the illumination assembly is modulated by the polarization plane of the first polarizing assembly and then enters the reflective micro-display assembly, and the reflective micro-display assembly debugs the entered illumination light to generate image light, so The image light is again modulated by the polarization plane of the first polarizing assembly and then enters the imaging assembly, and the imaging assembly adjusts the optical path of the image light and enters the image polarization beam splitting steering assembly, which adjusts the output of the image. pupil direction. The system greatly reduces the size of the display module, and at the same time improves the efficiency of the light source, reduces the heat source, and greatly reduces the cost.

Description

A Novel AR Display Optical System

technical field

The present invention relates to the field of AR technology, in particular to a novel AR display optical system.

Background technique

Diffractive optical display module is one of the key technologies that must be used in current AR glasses. Diffractive optical display modules of mainstream technology usually include waveguides and light engines. The light engine generally consists of an image source display component including a micro-display, a polarization component, and a lens group. The diffractive optical display module transmits the image image emitted by the image source to the waveguide sheet through the polarization component and the optical transmission system composed of the lens, and then the image transmitted by the waveguide sheet is projected to the human eye. The diffractive optical display module here needs to meet the smallest possible volume, weight, power consumption, etc., so that the product design can be adapted to the shape of glasses and more in line with the needs of the public.

For the optical projection system, there are many design and structure schemes in the industry, but generally the light engine with a single image source is shown in Figure 1. If the light engine has only one image source as the image input, it is necessary to make the binocular of the human eye. Seeing independent images requires two independent light engines. Such AR glasses bring challenges in size, power consumption, weight and shape design.

SUMMARY OF THE INVENTION

In order to overcome the above-mentioned defects of the prior art, the present invention provides a novel AR display optical system to solve the problems raised in the above-mentioned background art.

The technical solution adopted by the present invention to solve the problems in the prior art is as follows: a new type of AR display optical system, including an illumination component for emitting illumination light, a reflective micro-display component with dual image sources, a first polarizing component, a projection An image imaging assembly and an image polarization beam splitting and turning assembly, the illumination light emitted by the illumination assembly is modulated by the polarization plane of the first polarizing assembly and then enters the reflective micro-display assembly, and the reflective micro-display assembly is sensitive to the entering illumination light. Debugging generates image light, which is modulated by the polarization plane of the first polarizing component and then enters the imaging component. The imaging component adjusts the optical path of the image light and then enters the image polarization beam splitting steering component. The image polarization beam splits The steering assembly adjusts the exit pupil direction of the image.

As a preferred solution of the present invention, the first polarizing component may be a polarizing component with a single polarizing plane, a polarizing component with two polarizing planes, or a polarizing component with three polarizing planes.

As a preferred solution of the present invention, the reflective micro-display assembly includes two or more than two micro-display assemblies, and the micro-display assemblies are arranged at positions corresponding to the polarization planes.

As a preferred solution of the present invention, the micro-display component is an LCOS micro-display component or a DLP micro-display component.

As a preferred solution of the present invention, the image polarization beam splitting turning component includes a second polarizing component with at least two polarization planes and two turning prisms, the second polarizing component receives the image light emitted by the imaging component, and modulates the image The light rays are respectively emitted in two directions along the dual polarization planes, and the turning prism is arranged at the corresponding position of the polarization plane of the second polarization component, receives the image light emitted by the second polarization component, and adjusts the output of the image light. pupil direction.

As a preferred solution of the present invention, a turning prism for adjusting the transmission direction of the image light may be further provided between the imaging component and the image polarization splitting and turning component.

As a preferred solution of the present invention, the lighting assembly includes at least one of red, green and blue light sources.

Compared with the prior art, the present invention has the following technical effects:

A new type of AR display optical system in the present invention highly integrates the binocular engines of AR glasses and reuses most of the optical components without affecting the function of the optical projection system, which greatly reduces the size of the display model. The volume of the group is reduced, and the light source of the lighting component is fully utilized, which greatly improves the efficiency of the light source, reduces the heat source, and greatly reduces the cost.

Description of drawings

1 is a structural diagram of a diffractive optical waveguide system displayed by AR in the prior art;

2 is a structural diagram of Embodiment 1 of a novel AR display optical system of the present invention;

FIG. 3 is a structural diagram of Embodiment 2 of a novel AR display optical system of the present invention.

Numerals in the figure: 1. Lighting assembly; 2. Reflective micro-display assembly; 3. First polarizing assembly; 4. Imaging assembly; 22. The second micro-display assembly; 51. The second polarizing assembly; 52. The turning prism.

Detailed ways

The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted here that the descriptions of these embodiments are used to help the understanding of the present invention, but do not constitute a limitation of the present invention. In addition, the technical features involved in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

As shown in the attached drawings: a new type of AR display optical system, comprising an illumination component 1 for emitting illumination light, a reflective micro-display component 2 with dual image sources, a first polarizing component 3, an imaging component 4 for projecting an image, and The image polarization beam splitting and steering assembly 5, the illumination light emitted by the illumination assembly 1 is modulated by the polarization plane of the first polarizing assembly 3 and then enters the reflective micro-display assembly 2. Debugging generates image light, which is modulated by the polarization plane of the first polarizing component 3 and then enters the imaging component 4. The imaging component 4 adjusts the optical path of the image light and then enters the image polarization splitting and turning component. The image The polarization beam splitting steering assembly adjusts the exit pupil direction of the image.

Preferably, the first polarizing component 3 may be a polarizing component with a single polarizing plane, a polarizing component with two polarizing planes, or a polarizing component with three polarizing planes.

Preferably, the reflective micro-display assembly 2 includes two or more than two micro-display assemblies. The micro-display assembly 2 may adopt an LCOS micro-display assembly or a DLP micro-display assembly, and the micro-display assemblies are arranged on the corresponding polarization planes. place.

Preferably, the image polarization beam splitting and turning component includes a second polarizing component 51 with at least dual polarization planes and two turning prisms 52, the second polarizing component 51 receives the image light emitted by the imaging component 4, and modulates the image The light rays are respectively emitted in two directions along the dual polarization planes. The turning prism 52 is arranged at the corresponding position of the polarization plane of the second polarization element 51 to receive the image light emitted by the second polarization element 51 and adjust the image. The exit pupil direction of the light.

Preferably, a turning prism 6 for adjusting the transmission direction of the image light may be further provided between the imaging assembly 4 and the image polarization beam splitting turning assembly.

Preferably, the lighting assembly 1 includes at least one of red, green and blue light sources.

Preferably, the imaging component 4 includes a first spherical lens, a second spherical lens and an aspheric convex-concave lens, and the image light rays pass through the first spherical lens, the aspherical convex-concave lens and the second spherical lens in sequence.

As shown in FIG. 2 , in the first embodiment of the present application, the lighting component 1 is arranged on one side of the reflective micro-display component 2 , and the reflective micro-display component 2 is a polarizing component with dual polarization planes, and the polarizing component is opposite to the polarizing component. Both sides are provided with a first microdisplay assembly 21 and a second microdisplay assembly 22, and the illumination light emitted by the illumination assembly 1 enters the first microdisplay assembly 21 and the second microdisplay assembly respectively after being modulated by the dual polarization planes of the first polarizing assembly 3. Component 22 is displayed.

The first micro-display assembly 21 and the second micro-display assembly 22 debug the incoming illumination light to generate image light and emit, and the outgoing image light is modulated by the dual polarization planes of the first polarizing assembly 3 and then enters the imaging assembly 4, The imaging component 4 adjusts the optical path of the image light passing through the internal lens, and projects it according to the relevant parameters that meet the requirements of the optical waveguide sheet.

The imaging component 4 projects the image light into the second polarizing component 51 of the image polarization beam splitting and steering component. The second polarizing component 51 is a polarizing component with dual polarization planes, and the second polarizing component 51 receives the image light emitted by the imaging component 4. , and modulate the image light to be emitted in two directions along the dual polarization planes. The two turning prisms 52 are respectively arranged in the two outgoing directions to receive the image light emitted by the second polarizing component 51 and adjust the image. The exit pupil direction of the light.

As shown in FIG. 3 , in the second embodiment of the present application, the lighting component 1 is arranged on the side of the reflective micro-display component 2 , and the reflective micro-display component 2 is a polarizing component with a single polarization plane. The adjacent two sides are provided with a first micro-display assembly 21 and a second micro-display assembly 22, and the illumination light emitted by the illumination assembly 1 enters the first micro-display assembly 21 and the second after being modulated by the dual polarization planes of the first polarizing assembly 3, respectively. Microdisplay assembly 22 .

The first micro-display assembly 21 and the second micro-display assembly 22 debug the incoming illumination light to generate image light and emit it, and the outgoing image light is modulated by the polarization plane of the first polarizing assembly 3 and then enters the imaging assembly 4 to form an image. The component 4 adjusts the optical path of the image light passing through the internal lens, and projects it according to the relevant parameters that meet the requirements of the optical waveguide sheet.

In order to make the layout of the optical waveguide system of the present application more suitable for the design of AR glasses, a turning prism 6 for adjusting the transmission direction of the image light can also be provided between the imaging component 4 and the image polarization beam splitting steering component. The imaging component 4 The projected image light enters into the turning prism 6, and the turning prism 6 refracts the light to the second polarizing component 51 of the image polarization splitting and turning component, the second polarizing component 51 is a polarizing component with dual polarization planes, and the second polarizing component 51 receives the image light emitted by the imaging component 4, and modulates the image light to be emitted in two directions along the dual polarization planes. The emitted image ray and adjust the exit pupil direction of the image ray.

Compared with the prior art, the present invention has the following technical effects:

A new type of AR display optical system in the present invention highly integrates the binocular engines of AR glasses and reuses most of the optical components without affecting the function of the optical projection system, which greatly reduces the size of the display model. The volume of the group is reduced, and the light source of the lighting assembly 1 is fully utilized, which greatly improves the efficiency of the light source, reduces the heat source, and greatly reduces the cost.

Finally, it should be noted that the above descriptions are only preferred embodiments of the present invention, and are 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, the The technical solutions described in the foregoing embodiments may be modified, or some technical features thereof may be equivalently replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (7)

1. A novel AR display optical system is characterized in that: the illumination device comprises an illumination assembly for emitting illumination light, a reflective micro-display assembly with double image sources, a first polarization assembly, an imaging assembly for projecting images and an image polarization beam splitting and steering assembly, wherein the illumination light emitted by the illumination assembly enters the reflective micro-display assembly after being modulated by a polarization surface of the first polarization assembly, the reflective micro-display assembly debugs the entering illumination light to generate image light, the image light enters the imaging assembly after being modulated by the polarization surface of the first polarization assembly again, the imaging assembly enters the image polarization beam splitting and steering assembly after carrying out light path adjustment on the image light, and the image polarization beam splitting and steering assembly adjusts the exit pupil direction of the image.

2. The novel AR display optical system according to claim 1, characterized in that: the first polarization component can be a single polarization plane polarization component, a double polarization plane polarization component or a triple polarization plane polarization component.

3. The novel AR display optical system according to claim 2, characterized in that: the reflective micro-display assembly comprises two or more micro-display assemblies, and the micro-display assemblies are arranged at the corresponding positions of the polarization surfaces.

4. The novel AR display optical system of claim 3, wherein: the micro-display component is an LCOS micro-display component or a DLP micro-display component.

5. The novel AR display optical system according to claim 1, characterized in that: the image polarization beam splitting and steering assembly comprises a second polarization assembly with at least two polarization surfaces and two steering prisms, the second polarization assembly receives image light emitted by the imaging assembly and modulates the image light to emit along the two polarization surfaces respectively in two directions, and the steering prisms are arranged at the corresponding positions of the polarization surfaces of the second polarization assembly, receive the image light emitted by the second polarization assembly and adjust the exit pupil direction of the image light.

6. The novel AR display optical system of claim 5, wherein: and a turning prism for adjusting the transmission direction of the image light can be arranged between the imaging component and the image polarization light splitting and turning component.

7. The novel AR display optical system according to claim 1, characterized in that: the lighting assembly comprises at least one of red, green and blue light sources.

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