Optical-mechanical structure

Abstract

The utility model provides an optical-mechanical structure. The lighting module comprises a light source, and a first reflective compound eye structure, a second reflective compound eye structure and a first field lens which are sequentially arranged on a light emitting path of the light source, and an included angle is formed between the first reflective compound eye structure and the second reflective compound eye structure; the imaging module comprises an imaging lens group, a polarization splitting prism and an LCOS chip, the imaging lens group and the LCOS chip are arranged on two opposite sides of the polarization splitting prism respectively, the first field lens is located between the second reflective compound eye structure and the polarization splitting prism, and the first field lens, the imaging lens group and the LCOS chip are located on different sides of the polarization splitting prism. The light source is located on the side, away from the polarization splitting prism, of the LCOS chip, and the first direction is parallel to the optical axis direction of the imaging lens set. According to the utility model, the problem of difficulty in height compression of an optical-mechanical structure in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of optical imaging equipment, and in particular to an optical-mechanical structure. Background Art

[0002] With the continuous development and updating of optical equipment, various optical devices have emerged, especially in AR head-mounted devices. Users usually wear AR head-mounted devices on their heads, so they have high requirements for the weight, volume, and appearance of the equipment. As an important module in AR head-mounted devices, the optomechanical structure is mostly installed at the front end of the temples close to the lenses. The volume and size ratio of the optomechanical structure have a crucial impact on the appearance of the AR head-mounted device. In order to match the shape of the temples, the height of the optomechanical structure needs to be compressed.

[0003] The current optomechanical structure is usually an LCOS optomechanical machine, which is a passive light-emitting type and requires an illumination module to illuminate the LCOS chip. In order to evenly illuminate the LCOS chip, the illumination module must be designed to shape the light beam, which usually includes functions such as collimation and light mixing. Due to the limitations of the optomechanical structure and optical path, it is difficult for LCOS optomechanical machines to achieve a slender structure.

[0004] That is to say, the optical-mechanical structure in the prior art has the problem of being highly difficult to compress. Utility Model Content

[0005] The main purpose of the utility model is to provide an optical-mechanical structure to solve the problem that the optical-mechanical structure in the prior art is difficult to compress.

[0006] In order to achieve the above-mentioned purpose, the utility model provides an optical-mechanical structure, including: an illumination module, the illumination module including a light source and a first reflective compound-eye structure, a second reflective compound-eye structure and a first field mirror which are sequentially arranged on a light output path of the light source, the first reflective compound-eye structure and the second reflective compound-eye structure being arranged relatively to each other along a first direction, and an angle being formed between the first reflective compound-eye structure and the second reflective compound-eye structure; an imaging module, the imaging module including an imaging lens group, a polarization beam splitter prism and an LCOS chip, the imaging lens group and the LCOS chip being respectively arranged on two opposite sides of a group of the polarization beam splitter prism, the first field mirror being located between the second reflective compound-eye structure and the polarization beam splitter prism, and the first field mirror, the imaging lens group and the LCOS chip being located on different sides of the polarization beam splitter prism, the light source being located on a side of the LCOS chip away from the polarization beam splitter prism, and the first direction being parallel to the optical axis direction of the imaging lens group.

[0007] Furthermore, the lighting module also includes a shaping lens group, which is located at the light-emitting side of the light source, and a beam divergence angle θ of the light beam emitted by the light source after passing through the shaping lens group satisfies: 0°<θ<50°.

[0008] Furthermore, the optical axis direction of the light source is perpendicular or parallel to the optical axis direction of the imaging lens group. When the optical axis direction of the light source is parallel to the optical axis direction of the imaging lens group, the illumination module further includes a reflecting mirror, which is located between the light source and the first reflective compound eye structure and on the side of the LCOS chip away from the polarization beam splitter prism. The reflecting mirror is used to deflect the optical path between the light source and the first reflective compound eye structure.

[0009] Furthermore, the reflecting mirror is arranged obliquely to the optical axis of the light source.

[0010] Furthermore, the first reflective compound eye structure has a first reflective surface, which is formed by an array of a plurality of first micro-reflective surfaces. The second reflective compound eye structure has a second reflective surface, which is formed by an array of a plurality of second micro-reflective surfaces. The number of the first micro-reflective surfaces is the same as that of the second micro-reflective surfaces; and / or the plurality of first micro-reflective surfaces and the plurality of second micro-reflective surfaces correspond to each other one by one.

[0011] Furthermore, the side length of the first micro-reflective surface is greater than or equal to 0.05 mm and less than or equal to 2 mm; and / or the side length of the second micro-reflective surface is greater than or equal to 0.05 mm and less than or equal to 2 mm.

[0012] Furthermore, the illumination module further includes a second field lens and a third field lens, which are arranged between the polarization beam splitter prism and the LCOS chip along the direction away from the polarization beam splitter prism.

[0013] Furthermore, the opto-mechanical structure further includes a polarizer and a quarter-wave plate. The polarizer is arranged between the first field lens and the polarization beam splitter prism, and the quarter-wave plate is located between the imaging lens group and the polarization beam splitter prism.

[0014] Furthermore, the imaging lens group is composed of a plurality of lenses. The aperture stop of the imaging lens group is located on the side of the plurality of lenses away from the polarization beam splitter prism. The entrance pupil diameter EPD of the imaging lens group satisfies: 3 mm < EPD < 8 mm; and / or the field of view FOV of the imaging lens group satisfies: 20° < FOV < 90°.

[0015] Furthermore, the height H of the opto-mechanical structure in the second direction satisfies: H ≤ 10 mm, and the second direction is perpendicular to the optical axis of the imaging lens group.

[0016] According to the technical solution of the utility model, the optical-mechanical structure includes an illumination module and an imaging module, the illumination module includes a light source and a first reflective compound-eye structure, a second reflective compound-eye structure and a first field mirror which are sequentially arranged on a light output path of the light source, the first reflective compound-eye structure and the second reflective compound-eye structure are arranged relatively to each other along a first direction, and an angle is formed between the first reflective compound-eye structure and the second reflective compound-eye structure; the imaging module includes an imaging lens group, a polarization beam splitter prism and an LCOS chip, the imaging lens group and the LCOS chip are respectively arranged on two opposite sides of a group of polarization beam splitter prisms, the first field mirror is located between the second reflective compound-eye structure and the polarization beam splitter prism, and the first field mirror, the imaging lens group and the LCOS chip are located on different sides of the polarization beam splitter prism, the light source is located on a side of the LCOS chip away from the polarization beam splitter prism, and the first direction is parallel to the optical axis direction of the imaging lens group.

[0017] By setting the light source on the side of the LCOS chip away from the polarization beam splitter prism, the light source is located in the length direction of the imaging module, and at the same time, a first reflective compound eye structure and a second reflective compound eye structure are set in the light emitting direction of the light source, and the first reflective compound eye structure and the second reflective compound eye structure are planned to be arranged relatively along the first direction, so that the light emitted by the light source is reflected by the first reflective compound eye structure and the second reflective compound eye structure in turn to realize the turning of the light path, thereby reflecting the light into the first field mirror, and then reflecting it to the LCOS chip through the polarization beam splitter prism. The LCOS chip reflects the received light and enters the imaging lens group through the polarization beam splitter prism, and then realizes imaging through the imaging lens group. The optical-mechanical structure of the present application can compress the height of the optical-mechanical structure by reasonably arranging the position of the light source and the matching of various components, thereby forming a slender optical-mechanical shape, and superimposing most of the total lighting length to the length direction of the optical-mechanical structure, that is, the first direction, so that when the optical-mechanical structure of the present application is applied to AR glasses, the AR glasses are overall slender and thin, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0019] Figure 1 A dimensioning diagram of an optical-mechanical structure in the prior art is shown;

[0020] Figure 2 Shows Figure 1 A schematic diagram of another angle of the prior art optical-mechanical structure;

[0021] Figure 3 A schematic diagram showing the structure of the optical-mechanical structure of the first embodiment of the utility model is shown;

[0022] Figure 4 Shows Figure 3 A schematic diagram of the optomechanical structure from another angle;

[0023] Figure 5 A schematic diagram showing the structure of the optical-mechanical structure of the second embodiment of the present utility model is shown;

[0024] Figure 6 Shows Figure 5 A schematic diagram of the optomechanical structure from another angle;

[0025] Figure 7 A schematic structural diagram of a first reflective compound-eye structure and a second reflective compound-eye structure of an optional embodiment of the utility model is shown.

[0026] The above drawings include the following reference numerals:

[0027] 10. Light source; 20. First reflective compound-eye structure; 21. First micro-reflection surface; 30. Second reflective compound-eye structure; 31. Second micro-reflection surface; 41. First field mirror; 42. Second field mirror; 43. Third field mirror; 50. Polarization beam splitter prism; 60. Imaging lens group; 70. LCOS chip; 80. Reflector; 90. Shaping lens group. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0030] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0031] like Figure 1 and Figure 2As shown, the optical-mechanical structure in the prior art is described. The optical-mechanical structure in the prior art includes a light source 10 and a lens group, a fly-eye lens, a field lens and a polarization beam splitter prism 50 arranged in sequence on the light-emitting side of the light source 10. An imaging lens group 60 is arranged on the left side of the polarization beam splitter prism 50, and two lenses and an LCOS chip 70 are arranged on the right side. This arrangement of the prior art makes the length L of the optical-mechanical structure in the first direction and the height H in the second direction relatively large, so that the overall size is relatively large, and when assembled on the temple, the space occupied is relatively large, and it is impossible to achieve a slender strip shape along the extension direction of the temple.

[0032] In order to solve the problem that the optical-mechanical structure in the prior art is difficult to be highly compressed, the utility model provides an optical-mechanical structure.

[0033] like Figures 3 to 7 As shown, the optical-mechanical structure includes an illumination module and an imaging module. The illumination module includes a light source 10 and a first reflective compound-eye structure 20, a second reflective compound-eye structure 30 and a first field mirror 41 which are sequentially arranged on the light output path of the light source 10. The first reflective compound-eye structure 20 and the second reflective compound-eye structure 30 are arranged relatively to each other along a first direction, and there is an angle between the first reflective compound-eye structure 20 and the second reflective compound-eye structure 30. The imaging module includes an imaging lens group 60, a polarization beam splitter prism 50 and an LCOS chip 70. The imaging lens group 60 and the LCOS chip 70 are respectively arranged on two opposite sides of a group of polarization beam splitter prisms 50. The first field mirror 41 is located between the second reflective compound-eye structure 30 and the polarization beam splitter prism 50, and the first field mirror 41, the imaging lens group 60 and the LCOS chip 70 are located on different sides of the polarization beam splitter prism 50. The light source 10 is located on a side of the LCOS chip 70 away from the polarization beam splitter prism 50, and the first direction is parallel to the optical axis direction of the imaging lens group 60.

[0034] By setting the light source 10 on the side of the LCOS chip 70 away from the polarization beam splitter prism 50, the light source 10 is located in the length direction of the imaging module, and at the same time, a first reflective compound eye structure 20 and a second reflective compound eye structure 30 are set in the light emitting direction of the light source 10, and the first reflective compound eye structure 20 and the second reflective compound eye structure 30 are planned to be arranged relatively along the first direction, so that the light emitted by the light source 10 is reflected by the first reflective compound eye structure 20 and the second reflective compound eye structure 30 in turn to achieve a turning of the light path, so that the light is reflected to the first field mirror 41, and then reflected to the LCOS chip 70 through the polarization beam splitter prism 50, the LCOS chip 70 reflects the received light, and enters the imaging lens group 60 through the polarization beam splitter prism 50, and then imaging is achieved through the imaging lens group 60. The optomechanical structure of the present application can compress the height of the optomechanical structure by reasonably arranging the position of the light source 10 and matching various components, thereby forming a slender optomechanical shape, and superimposing most of the total lighting length to the length direction of the optomechanical structure, that is, the first direction. As a result, when the optomechanical structure of the present application is used in AR glasses, the AR glasses as a whole become slim and light, thereby improving the user experience.

[0035] Preferably, the light source 10 is a three-color LED, which lights up different colors in sequence, and the duty ratio of the three colors is preferably 4:4:2.

[0036] Specifically, the lighting module further includes a shaping lens group 90, which is located at the light-emitting side of the light source 10. Specifically, the shaping lens group 90 is a collimating lens group, and the beam divergence angle θ of the light beam emitted by the light source 10 after passing through the shaping lens group 90 satisfies: 0°<θ<50°. Preferably, 0°<θ<30°.

[0037] In an optional embodiment of the present application, the shaping lens group 90 includes two biconvex lenses.

[0038] Specifically, the optical axis direction of the light source 10 is perpendicular or parallel to the optical axis direction of the imaging lens group 60. In one embodiment of the present application, the optical axis direction of the light source 10 is perpendicular to the optical axis direction of the imaging lens group 60. In another embodiment of the present application, the optical axis direction of the light source 10 is parallel to the optical axis direction of the imaging lens group 60. In this case, the lighting module further includes a reflector 80, which is located between the light source 10 and the first reflective compound-eye structure 20 and on the side of the LCOS chip 70 away from the polarization beam splitter prism 50. The reflector 80 is parallel to the first reflective compound-eye structure 20. The reflector 80 is used to realize the deflection of the optical path between the light source 10 and the first reflective compound-eye structure 20, thereby reflecting the light emitted by the light source 10 onto the first reflective compound-eye structure 20.

[0039] refer to Figure 4When the lighting module includes a reflector 80, the reflector 80 is arranged to be inclined relative to the optical axis of the light source 10. Preferably, the reflector 80 is arranged to be inclined at 45°, that is, the angle between the reflector 80 and the light source 10 is 45°.

[0040] refer to Figure 7 The first reflective compound eye structure 20 has a first reflective surface, which is formed by an array of multiple first micro-reflective surfaces 21. The second reflective compound eye structure 30 has a second reflective surface, which is formed by an array of multiple second micro-reflective surfaces 31. The number of the first micro-reflective surfaces 21 is the same as the number of the second micro-reflective surfaces 31, and the multiple first micro-reflective surfaces 21 correspond to the multiple second micro-reflective surfaces 31. This arrangement allows the multiple first micro-reflective surfaces 21 to converge one-to-one onto the multiple second micro-reflective surfaces 31, so that the multiple second micro-reflective surfaces 31 receive the light reflected by the corresponding first micro-reflective surfaces 21 to achieve further transmission.

[0041] Specifically, the side length of the first micro-reflection surface 21 is greater than or equal to 0.05 mm and less than or equal to 2 mm; the side length of the second micro-reflection surface 31 is greater than or equal to 0.05 mm and less than or equal to 2 mm. Reasonable planning of the sizes of the first micro-reflection surface 21 and the second micro-reflection surface 31 is conducive to ensuring the reliability of light beam transmission.

[0042] In addition, in the present application, the lighting module may be provided with only one field lens, or the lighting module may further include a second field lens 42 and a third field lens 43, and the second field lens 42 and the third field lens 43 are arranged between the polarization beam splitter prism 50 and the LCOS chip 70 in a direction away from the polarization beam splitter prism 50. The surface shape of the first field lens 41 is biconvex, the surface shape of the second field lens 42 is biconvex, and the surface shape of the third field lens 43 is convex-concave.

[0043] Optionally, the optical-mechanical structure further includes a polarizer and a quarter wave plate, wherein the polarizer is disposed between the first field lens 41 and the polarization beam splitter prism 50, and the quarter wave plate is located between the imaging lens group 60 and the polarization beam splitter prism 50. The polarizer is used to convert the light beam output by the light source 10 into polarized light, and the quarter wave plate is used to adjust the polarization state of the polarized light, thereby realizing the switching between circularly polarized light and linearly polarized light.

[0044] refer to Figure 4, the imaging lens group 60 is composed of multiple lenses. In a specific embodiment of the present application, the multiple lenses are two lenses, namely a biconvex lens and a biconcave lens respectively. The aperture stop of the imaging lens group 60 is located on the side of the multiple lenses away from the polarization beam splitter prism 50, that is, the left side in the figure. The light enters the imaging lens group 60 from the right side and exits to the left side, and forms an image on the aperture stop side of the imaging lens group 60. The entrance pupil diameter EPD of the imaging lens group 60 satisfies: 3mm < EPD < 8mm; the field of view FOV of the imaging lens group 60 satisfies: 20° < FOV < 90°. The focal length EFL of the imaging lens group 60 satisfies: 1.5mm < EFL < 10mm, and the principal ray angle of the imaging plane of the imaging lens group 60 preferably ranges from -5° < CRA < 5°.

[0045] Specifically, the height H of the opto-mechanical structure in the second direction satisfies: H ≤ 10mm, and the second direction is perpendicular to the optical axis of the imaging lens group 60. By reasonably arranging the position of the light source 10 and matching the first reflective compound eye structure 20 and the second reflective compound eye structure 30 in the present application, only the second reflective compound eye structure 30, the first field lens 41, and the polarization beam splitter prism 50 determine the height H of the opto-mechanical structure in the second direction. That is to say, the structure of the opto-mechanical structure in the second direction is less, so that the size of the opto-mechanical structure in the second direction can be reasonably compressed, and the height H of the opto-mechanical structure in the second direction is within the range less than 10mm.

[0046] The present application also provides an AR glasses, including a frame, temple arms, and the above-mentioned opto-mechanical structure. The frame is provided with lenses, and the opto-mechanical structure is arranged on the temple arms and corresponds to the lenses, so that the light emitted by the opto-mechanical structure and the light exiting from the aperture stop enter the lenses, and then through the transmission of the lenses, it is transmitted to the human eye for display.

[0047] The opto-mechanical structure of the present application will be described below with specific embodiments.

[0048] Embodiment 1

[0049] As Figure 3 and Figure 4 shown, the opto-mechanical structure of Embodiment 1 is described.

[0050] As Figure 3 and Figure 4As shown, the optical-mechanical structure includes a light source 10 and a shaping lens group 90 and a reflector 80 arranged in sequence on the light-emitting side of the light source 10, a first reflective compound eye structure 20 is located above the reflector 80, a second reflective compound eye structure 30 is located on the left side of the first reflective compound eye structure 20, a first field mirror 41 and a polarization beam splitter prism 50 are arranged in sequence on the light-emitting lower side of the second reflective compound eye structure 30, an imaging lens group 60 is arranged on the left side of the polarization beam splitter prism 50, and a second field mirror 42, a third field mirror 43 and an LCOS chip 70 are arranged in sequence on the right side of the polarization beam splitter prism 50. In this embodiment, the reflector 80 is located on the side of the LCOS chip 70 away from the third field mirror 43, and the optical axis of the light source 10 is parallel to the optical axis of the imaging lens group 60.

[0051] In this embodiment, the light source 10 and the shaping lens group 90 in the lighting module are partially moved to the right side of the imaging module, and the reflector 80, the first reflective compound eye structure 20 and the second reflective compound eye structure are reasonably arranged to turn the light path from the rear of the imaging module to the top of the imaging module to enter the polarization beam splitter prism 50, and then illuminate the LCOS chip 70. In this embodiment, the length L of the optomechanical structure in the first direction is 18.45 mm, the height H of the optomechanical structure in the second direction is reduced from the original 12.91 mm to 9.4 mm, the width W is 5.24 mm, the volume V is 0.908773 cc, the height H is reduced by 3.51 mm, and the reduction ratio is 27.2%, realizing a slender optomechanical structure, which can effectively control the height of the optomechanical structure, make the shape of the optomechanical structure thinner, and better match the shape of the temples of AR glasses, so that the appearance of the glasses is thinner and the degree of freedom of appearance design is greater.

[0052] refer to Figure 4, the illumination light is emitted by the light source 10, propagates from right to left, and is collimated by the shaping lens group 90 into a light beam with a divergence angle of θ, 0°<θ<50°, and the preferred range is 0°<θ<30°. The collimated light beam is reflected by the tilted reflector 80, and the propagation direction of the light beam is changed to upward, propagating upward to the first reflection surface of the first reflective compound eye structure 20, and reflected by the multiple first micro-reflection surfaces 21 to be a light beam propagating from right to left. At this time, the light beam is changed from the original wide beam to multiple thin beams, and each thin beam is converged to the second reflection surface of the second reflective compound eye structure 30. The convergence point of each thin beam is on the multiple second micro-reflection surfaces 31. The multiple second micro-reflection surfaces 31 reflect the light beam again, and the propagation direction of the light beam is changed to downward, and the divergence angle of each thin beam is consistent. Then, after passing through the first field lens 41, the light enters the polarizer, which is arranged above the polarization beam splitter prism 50 (not shown in the figure), and converts the natural light into S light. Multiple fine light beams with the same divergence angle are reflected by the polarization beam splitter prism 50, and the S light is transmitted to the right to irradiate the LCOS chip 70. The second field lens 42 and the third field lens 43 project multiple fine light beams to the same size area of ​​the image plane of the LCOS chip 70, forming a light spot with uniform illumination and color distribution. The LCOS chip 70 reflects the incident light and converts the S light into P light at the same time, passes through each lens and the polarization beam splitter prism 50, and finally exits at a certain field angle through the imaging lens group 60 to complete the image projection.

[0053] Embodiment 2

[0054] like Figure 5 and Figure 6 As shown, the optical-mechanical structure of the second embodiment is described.

[0055] like Figure 5 and Figure 6 As shown, the optical-mechanical structure includes a light source 10 and a shaping lens group 90 arranged on the light-emitting side of the light source 10, a first reflective compound eye structure 20 is located above the shaping lens group 90, a second reflective compound eye structure 30 is located on the left side of the first reflective compound eye structure 20, a first field lens 41 and a polarization beam splitter prism 50 are arranged in sequence on the light-emitting lower side of the second reflective compound eye structure 30, an imaging lens group 60 is arranged on the left side of the polarization beam splitter prism 50, and a second field lens 42, a third field lens 43 and an LCOS chip 70 are arranged in sequence on the right side of the polarization beam splitter prism 50. In this embodiment, the shaping lens group 90 is located on the side of the LCOS chip 70 away from the third field lens 43, and the optical axis of the light source 10 is perpendicular to the optical axis of the imaging lens group 60.

[0056] In this embodiment, the length L of the optomechanical structure in the first direction is 16.23 mm, the height H of the optomechanical structure in the second direction is 9.4 mm, the width W is 5.24, and the volume V is 0.799425 cc. However, the height H is reduced by 3.51 mm compared with the existing structure, and the reduction ratio is 27.2%, thereby realizing a slender optomechanical structure and effectively controlling the height of the optomechanical structure. At the same time, the increase in length is smaller than that in Example 1, so that the optomechanical structure is thinner in shape and smaller in volume, which can better match the shape of the temples of AR glasses, making the appearance of the glasses slimmer and providing greater freedom in appearance design.

[0057] In this embodiment, the illumination light is emitted by the light source 10, propagates from bottom to top, and is collimated into a light beam with a divergence angle of θ by the shaping lens group 90, 0°<θ<50°, preferably in the range of 0°<θ<30°. The collimated light beam propagates to the first reflective compound eye structure 20, and the subsequent optical path is the same as that in the first embodiment, and the description in the first embodiment can be referred to.

[0058] Table 1 below shows a size comparison diagram of the existing structure, Example 1 and Example 2 of the present application. It can be seen from the table below that, under the same field of view angle FOV, the same pupil diameter EPD, the same focal length EFL, and the same CRA, the height H of the optical-mechanical structure of Example 1 and Example 2 of the present application is significantly compressed compared to the existing structure, and the overall volume V does not change much.

[0059]

[0060] Table 1

[0061] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0062] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0063] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0064] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An optomechanical structure, characterized in that: include: A lighting module, comprising a light source (10) and a first reflective compound eye structure (20), a second reflective compound eye structure (30) and a first field mirror (41) arranged in sequence on a light output path of the light source (10), the first reflective compound eye structure (20) and the second reflective compound eye structure (30) being arranged opposite to each other along a first direction, and an angle being formed between the first reflective compound eye structure (20) and the second reflective compound eye structure (30); An imaging module, the imaging module comprising an imaging lens group (60), a polarization beam splitter prism (50) and an LCOS chip (70), the imaging lens group (60) and the LCOS chip (70) being respectively arranged on two opposite sides of the polarization beam splitter prism (50), the first field lens (41) being located between the second reflective compound eye structure (30) and the polarization beam splitter prism (50), and the first field lens (41), the imaging lens group (60) and the LCOS chip (70) being located on different sides of the polarization beam splitter prism (50), the light source (10) being located on a side of the LCOS chip (70) away from the polarization beam splitter prism (50), and the first direction being parallel to the optical axis direction of the imaging lens group (60).

2. The optomechanical structure according to claim 1, characterized in that: The lighting module further comprises a shaping lens group (90), wherein the shaping lens group (90) is located at the light-emitting side of the light source (10), and a beam divergence angle θ of a light beam emitted by the light source (10) after passing through the shaping lens group (90) satisfies: 0°<θ<50°.

3. The optomechanical structure according to claim 1, wherein: The optical axis direction of the light source (10) is perpendicular or parallel to the optical axis direction of the imaging lens group (60). When the optical axis direction of the light source (10) is parallel to the optical axis direction of the imaging lens group (60), the lighting module further comprises a reflector (80), wherein the reflector (80) is located between the light source (10) and the first reflective compound-eye structure (20) and is located on a side of the LCOS chip (70) away from the polarization beam splitter prism (50). The reflector (80) is used to realize the deflection of the optical path between the light source (10) and the first reflective compound-eye structure (20).

4. The optomechanical structure according to claim 3, characterized in that: The reflector (80) is arranged to be inclined relative to the optical axis of the light source (10).

5. The optomechanical structure according to claim 1, wherein: The first reflective compound eye structure (20) has a first reflective surface, the first reflective surface is formed by an array of multiple first micro-reflective surfaces (21), the second reflective compound eye structure (30) has a second reflective surface, the second reflective surface is formed by an array of multiple second micro-reflective surfaces (31), The number of the first micro-reflection surfaces (21) is the same as the number of the second micro-reflection surfaces (31); and / or The plurality of first micro-reflection surfaces (21) correspond one-to-one to the plurality of second micro-reflection surfaces (31).

6. The optomechanical structure according to claim 5, characterized in that: The side length of the first micro-reflection surface (21) is greater than or equal to 0.05 mm and less than or equal to 2 mm; and / or The side length of the second micro-reflection surface (31) is greater than or equal to 0.05 mm and less than or equal to 2 mm.

7. The optomechanical structure according to any one of claims 1 to 6, characterized in that: The illumination module further includes a second field lens (42) and a third field lens (43), and the second field lens (42) and the third field lens (43) are arranged between the polarization beam splitter prism (50) and the LCOS chip (70) along the direction away from the polarization beam splitter prism (50).

8. The optomechanical structure according to any one of claims 1 to 6, characterized in that: The optical engine structure further includes a polarizer and a quarter-wave plate. The polarizer is disposed between the first field lens (41) and the polarization beam splitter prism (50), and the quarter-wave plate is located between the imaging lens group (60) and the polarization beam splitter prism (50).

9. The optomechanical structure according to any one of claims 1 to 6, characterized in that: The imaging lens group (60) is composed of a plurality of lenses, and the aperture stop of the imaging lens group (60) is located on the side of the plurality of lenses away from the polarization beam splitter prism (50). The entrance pupil diameter EPD of the imaging lens group (60) satisfies: 3mm < EPD < 8mm; and / or The field of view FOV of the imaging lens group (60) satisfies: 20° < FOV < 90°.

10. The optomechanical structure according to any one of claims 1 to 6, characterized in that: The height H of the optical engine structure in the second direction satisfies: H ≤ 10mm, and the second direction is perpendicular to the optical axis of the imaging lens group (60).

Images