A new AR display optical system

Abstract

The present invention relates to the field of AR technology, and in particular to a novel AR display optical system, comprising an illumination component for emitting illumination light, a reflective micro-display component of a dual image source, a first polarization component, an imaging component for projecting an image, and an image polarization splitting and steering component, wherein the illumination light emitted by the illumination component enters the reflective micro-display component after being modulated by the polarization plane of the first polarization component, the reflective micro-display component debugs the entered illumination light to generate image light, the image light enters the imaging component after being modulated by the polarization plane of the first polarization component again, the imaging component adjusts the optical path of the image light and enters the image polarization splitting and steering component, and the image polarization splitting and steering component adjusts the exit pupil direction of the image. The system greatly reduces the volume of the display module, while also improving the light source efficiency, reducing the heat source, and greatly reducing the cost.

Description

Technical Field

[0001] The present invention relates to the field of AR technology, and in particular to a novel AR display optical system. Background Art

[0002] Diffractive optical display module is one of the key technologies that must be used in current AR glasses. The mainstream diffractive optical display module usually includes a waveguide and a light engine. The light engine is generally composed of an image source display component including a micro display, a polarizing component, and a lens group. The image picture emitted by the image source of the diffractive optical display module is transmitted to the waveguide through an optical transmission system composed of a polarizing component and a lens, and then the waveguide transmits the image to the human eye. The diffractive optical display module here needs to meet the smallest possible size, weight, power consumption, etc., so that the product design can fit the form of glasses and better meet the needs of the public.

[0003] There are many designs and structures for optical projection systems in the industry, but they are generally single-image source light engines such as the attached Figure 1 As shown, if the light engine has only one image source as image input, two independent light engines are required to make both eyes of the human eye see independent images. Such AR glasses bring challenges in terms of size, power consumption, weight and appearance design. Summary of the invention

[0004] 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 technology.

[0005] The technical solution adopted by the present invention to solve the problems in the prior art is: 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 polarization component, an imaging component for projecting an image, and an image polarization splitting and steering component. The illumination light emitted by the illumination component is modulated by the polarization plane of the first polarization component and then enters the reflective micro-display component. The reflective micro-display component adjusts the entered illumination light to generate image light. The image light is again modulated by the polarization plane of the first polarization component and then enters the imaging component. The imaging component adjusts the optical path of the image light and then enters the image polarization splitting and steering component. The image polarization splitting and steering component adjusts the exit pupil direction of the image.

[0006] As a preferred solution of the present invention, the first polarization component may be a polarization component with a single polarization plane, a polarization component with two polarization planes, or a polarization component with three polarization planes.

[0007] As a preferred solution of the present invention, the reflective micro-display assembly includes two or more micro-display assemblies, and the micro-display assemblies are arranged at locations corresponding to the polarization planes.

[0008] As a preferred solution of the present invention, the micro display component is an LCOS micro display component or a DLP micro display component.

[0009] As a preferred embodiment of the present invention, the image polarization splitting and steering component includes a second polarization component with at least dual polarization planes and two steering prisms. The second polarization component receives the image light emitted by the imaging component, and modulates the image light to be emitted in two directions along the dual polarization planes. The steering prism is arranged at a position corresponding to the polarization plane of the second polarization component, receives the image light emitted by the second polarization component, and adjusts the exit pupil direction of the image light.

[0010] 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 redirecting component.

[0011] As a preferred solution of the present invention, the lighting assembly includes at least one of the three light sources of red, green and blue.

[0012] Compared with the prior art, the present invention has the following technical effects:

[0013] The present invention discloses a novel AR display optical system, which highly integrates the binocular vision engines of AR glasses without affecting the function of the optical projection system, and reuses most of the optical components, greatly reducing the size of the display module, and fully utilizing the light source of the lighting component, greatly improving the light source efficiency, reducing the heat source, and greatly reducing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of a diffraction optical waveguide system for AR display in the prior art;

[0015] Figure 2 It is a structural diagram of a first embodiment of a novel AR display optical system of the present invention;

[0016] Figure 3 It is a structural diagram of Example 2 of a novel AR display optical system of the present invention.

[0017] Numbers in the figure: 1, lighting component; 2, reflective micro-display component; 3, first polarization component; 4, imaging component; 5, image polarization splitting and steering component; 6, turning prism; 21, first micro-display component; 22, second micro-display component; 51, second polarization component; 52, steering prism. DETAILED DESCRIPTION

[0018] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does 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.

[0019] As shown in the accompanying drawings: a new type of AR display optical system, including an illumination component 1 for emitting illumination light, a reflective micro-display component 2 with dual image sources, a first polarization component 3, an imaging component 4 for projecting an image, and an image polarization splitting and steering component 5. The illumination light emitted by the illumination component 1 is modulated by the polarization plane of the first polarization component 3 and then enters the reflective micro-display component 2. The reflective micro-display component 2 adjusts the entered illumination light to generate image light. The image light is again modulated by the polarization plane of the first polarization 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 steering component. The image polarization splitting and steering component adjusts the exit pupil direction of the image.

[0020] Preferably, the first polarization component 3 may be a polarization component with a single polarization plane, a polarization component with two polarization planes, or a polarization component with three polarization planes.

[0021] Preferably, the reflective micro-display component 2 includes two or more micro-display components. The micro-display component 2 may be an LCOS micro-display component or a DLP micro-display component. The micro-display components are arranged at locations corresponding to the polarization planes.

[0022] Preferably, the image polarization splitting and steering component includes a second polarization component 51 with at least two polarization planes and two steering prisms 52. The second polarization 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 two polarization planes. The steering prism 52 is arranged at a position corresponding to the polarization plane of the second polarization component 51, receives the image light emitted by the second polarization component 51, and adjusts the exit pupil direction of the image light.

[0023] Preferably, a turning prism 6 for adjusting the transmission direction of the image light may be provided between the imaging component 4 and the image polarization splitting and redirecting component.

[0024] Preferably, the lighting assembly 1 comprises at least one of the three light sources of red, green and blue.

[0025] Preferably, the imaging assembly 4 comprises a first spherical lens, a second spherical lens and an aspherical convex-concave lens, and the image light sequentially passes through the first spherical lens, the aspherical convex-concave lens and the second spherical lens.

[0026] As attached Figure 2 As shown, 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 polarization component with dual polarization planes. A first micro-display component 21 and a second micro-display component 22 are arranged on opposite sides of the polarization component. The illumination light emitted by the lighting component 1 is modulated by the dual polarization planes of the first polarization component 3 and enters the first micro-display component 21 and the second micro-display component 22 respectively.

[0027] The first micro-display component 21 and the second micro-display component 22 adjust the incoming illumination light to generate image light and emit it. The emitted image light is modulated again by the dual polarization planes of the first polarization component 3 and enters the imaging component 4. The imaging component 4 adjusts the optical path of the image light through the internal lens and projects it according to the relevant parameters that meet the requirements of the optical waveguide.

[0028] The imaging component 4 projects the image light into the second polarization component 51 of the image polarization splitting and steering component. The second polarization component 51 is a polarization component with dual polarization planes. The second polarization 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 two steering prisms 52 are respectively arranged at two exit directions, receive the image light emitted by the second polarization component 51, and adjust the exit pupil direction of the image light.

[0029] As attached Figure 3 As shown, in the second 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 polarization component with a single polarization plane. A first micro-display component 21 and a second micro-display component 22 are arranged on the adjacent two sides of the polarization component. The illumination light emitted by the lighting component 1 is modulated by the dual polarization planes of the first polarization component 3 and enters the first micro-display component 21 and the second micro-display component 22 respectively.

[0030] The first micro-display component 21 and the second micro-display component 22 adjust the incoming illumination light to generate image light and emit it. The emitted image light is modulated again by the polarization plane of the first polarization component 3 and enters the imaging component 4. The imaging component 4 adjusts the optical path of the image light through the internal lens and projects it according to the relevant parameters that meet the requirements of the optical waveguide.

[0031] 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 be further provided between the imaging component 4 and the image polarization splitting and steering component. The imaging component 4 projects the image light into the turning prism 6, and the turning prism 6 refracts the light to the second polarization component 51 of the image polarization splitting and steering component. The second polarization component 51 is a polarization component with dual polarization planes. The second polarization 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 two steering prisms 52 are respectively arranged at two exit directions, receive the image light emitted by the second polarization component 51, and adjust the exit pupil direction of the image light.

[0032] Compared with the prior art, the present invention has the following technical effects:

[0033] The present invention provides a novel AR display optical system, which highly integrates the binocular vision engines of AR glasses without affecting the function of the optical projection system, and reuses most of the optical components, greatly reducing the size of the display module, and fully utilizing the light source of the lighting component 1, greatly improving the light source efficiency, reducing the heat source, and greatly reducing the cost.

[0034] Finally, it should be noted 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 aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A novel AR display optical system, characterized in that: The device comprises an illumination component for emitting illumination light, a reflective micro-display component with dual image sources, a first polarization component, an imaging component for projecting an image, and an image polarization splitting and steering component. The illumination light emitted by the illumination component is modulated by the polarization plane of the first polarization component and then enters the reflective micro-display component. The reflective micro-display component adjusts the illumination light entering to generate image light. The image light is modulated by the polarization plane of the first polarization component again and then enters the imaging component. The imaging component adjusts the optical path of the image light and then enters the image polarization splitting and steering component. The image polarization splitting and steering component adjusts the exit pupil direction of the image. The first polarization component is a polarization component with a single polarization plane, a polarization component with dual polarization planes, or a polarization component with three polarization planes; the reflective micro-display component includes two micro-display components, and the micro-display components are arranged at locations corresponding to the polarization planes; the image polarization splitting and steering component includes a second polarization component with at least dual polarization planes and two steering prisms, the second polarization component receives the image light emitted by the imaging component, and modulates the image light to be emitted in two directions along the dual polarization planes, the steering prism is arranged at a location corresponding to the polarization plane of the second polarization component, receives the image light emitted by the second polarization component, and adjusts the exit pupil direction of the image light.

2. A novel AR display optical system according to claim 1, characterized in that: The micro display component is an LCOS micro display component or a DLP micro display component.

3. A novel AR display optical system according to claim 1, characterized in that: A turning prism for adjusting the transmission direction of the image light may also be provided between the imaging component and the image polarization splitting and redirecting component.

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

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