Fly-eye lens, ray machine and projection equipment

Abstract

The utility model relates to a fly-eye lens. The fly-eye lens comprises a base material and a plurality of micro-mirror units, the plurality of micromirror units are arranged on the surface of the base material. Wherein the plurality of micro-mirror units form at least two micro-mirror groups, and the micro-mirror units in the same micro-mirror group are the same in shape and size. And the micro-mirror units corresponding to at least two adjacent micro-mirror groups are arranged in a staggered manner. The utility model further relates to an optical machine comprising the fly-eye lens and projection equipment comprising the optical machine.

Description

Technical Field

[0001] This disclosure relates to the field of optical technology, and in particular to a compound eye lens, an optical engine including the compound eye lens, and a projection device including the optical engine. Background Technology

[0002] Common projection devices typically include a light source, an illumination path, and an imaging chip. The illumination path projects the light emitted from the light source onto the imaging chip. This path usually includes one or two compound eye lenses, which homogenize the light. However, because the light emitted from a single micromirror unit of the compound eye lens already exhibits diffraction, the diffracted light emitted from multiple micromirror units will produce interference fringes. These interference fringes are projected onto the imaging chip, thus affecting the display quality of the projected image. Utility Model Content

[0003] This disclosure provides a compound eye lens, an optical engine, and a projection device, which can mitigate the impact of interference fringes formed when light passes through the compound eye lens on the displayed image.

[0004] In a first aspect, this disclosure relates to a compound eye lens, comprising:

[0005] Substrate; and

[0006] Multiple micromirror units are disposed on the surface of the substrate;

[0007] The micromirror units are arranged in a plurality of micromirror units to form at least two micromirror groups, and the micromirror units in the same micromirror group have the same shape and size; the micromirror units corresponding to at least two adjacent micromirror groups are staggered.

[0008] The compound eye lens provided in this embodiment sets at least two adjacent micromirror groups with misaligned micromirror units. When light shines on adjacent micromirror groups with misaligned micromirror units, the spacing of the two types of interference fringes formed by the outgoing light is inconsistent, causing the positions of the two types of interference fringes to change. This causes the interference fringes between different micromirror groups to at least partially cancel each other out, thereby disrupting the periodicity of the interference fringes in space and effectively alleviating the instability of the display image caused by interference fringes.

[0009] In one embodiment, the micromirror unit is projected into a rectangle along a first direction perpendicular to the surface of the substrate. The rectangle formed by the projection of each micromirror unit in the first direction includes a long side and a short side connected to the long side. Each long side is parallel to a second direction, and each short side is parallel to a third direction.

[0010] In one embodiment, each of the micromirror groups extends along the second direction on one side surface of the substrate, and the micromirror units corresponding to at least two adjacent micromirror groups are staggered along the short side of the projection in the first direction.

[0011] In one embodiment, each of the micromirror groups extends along the third direction on one side surface of the substrate, and the micromirror units corresponding to at least two adjacent micromirror groups are staggered along the long side of the projection in the first direction.

[0012] In one embodiment, the length of the long side of the projection of the micromirror unit along the first direction ranges from 0.5 mm to 1 mm.

[0013] In one embodiment, the half-working angle of each micromirror unit in the second direction is in the range of 5-7°, and the half-working angle of each micromirror unit in the third direction is in the range of 3-4°.

[0014] In one embodiment, each of the micromirror groups includes a plurality of micromirror units disposed on two opposing surfaces of the substrate along the first direction, wherein the projection of each micromirror unit on one surface coincides with that of a micromirror unit on the other surface in the first direction.

[0015] In one embodiment, the material of the substrate is different from the material of the micromirror unit.

[0016] In one embodiment, the substrate includes a first substrate and a second substrate disposed parallel to the first substrate; the plurality of micromirror units in each micromirror group are respectively disposed on the side surface of the first substrate away from the second substrate and the side surface of the second substrate away from the first substrate;

[0017] Wherein, the first substrate is bonded to the second substrate or an air medium is filled between the first substrate and the second substrate.

[0018] Secondly, this disclosure also relates to an optical engine, comprising:

[0019] Light source module, used to emit light from the light source; and

[0020] An illumination optical path module is used to guide the light source and homogenize the light source. The illumination optical path module includes a compound eye lens as described in any of the above embodiments.

[0021] The optical engine provided in this embodiment, by setting the compound eye lens as described in any of the above examples, and by setting at least two adjacent micromirror groups with misaligned micromirror units, when light shines on adjacent micromirror groups with misaligned micromirror units, the spacing of the two types of interference fringes formed by the outgoing light is inconsistent, causing the positions of the two types of interference fringes to change. This causes the interference fringes between different micromirror groups to at least partially cancel each other out, thereby destroying the periodicity of the interference fringes in space. This can effectively alleviate the instability of the display image caused by interference fringes and is beneficial to improving the overall display effect of the optical engine.

[0022] In one embodiment, the compound eye lens is used to receive the light source emitted from the light source module, and the difference in light energy of the light source received by the multiple micromirror groups does not exceed 10%.

[0023] In one embodiment, the optical engine further includes an optical modulation chip and a lens module. The optical modulation chip is used to receive the light source light homogenized by the illumination optical path module and modulate the light source light into image light. The lens module is used to receive the image light and project the image light outward.

[0024] In one embodiment, the illumination optical path module further includes a first beam shaping module and a second beam shaping module;

[0025] The first beam shaping module is disposed on the light-emitting side of the light source module, and the second beam shaping module is disposed on the light-emitting side of the first beam shaping module;

[0026] The compound eye lens is disposed on the light-emitting side of the first beam shaping module and the light-incident side of the second beam shaping module, or disposed on the light-emitting side of the light source module and the light-incident side of the first beam shaping module.

[0027] In one embodiment, another compound eye lens as described in any of the above embodiments is further provided between the light source module and the first beam shaping module or between the first beam shaping module and the second beam shaping module.

[0028] Thirdly, this disclosure also relates to a projection device, comprising:

[0029] The optical engine described in any of the above embodiments. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the compound eye lens in Comparative Example 1.

[0032] Figure 2 This is a three-dimensional structural diagram of the compound eye lens in Embodiment 1 provided in this disclosure.

[0033] Figure 3 yes Figure 2 A schematic diagram of the frontal structure of the lenticule in the middle compound eye.

[0034] Figure 4 yes Figure 3 A partially enlarged schematic diagram.

[0035] Figure 5 This is a schematic diagram of the micromirror unit in Embodiment 1 of this disclosure.

[0036] Figure 6 This is a front view schematic diagram of the arrangement of the micromirror group in Embodiment 2 provided in this disclosure.

[0037] Figure 7 This is a three-dimensional structural diagram of the compound eye lens in Embodiment 3 provided in this disclosure.

[0038] Figure 8 This is a three-dimensional structural diagram of the compound eye lens in Embodiment 4 provided in this disclosure.

[0039] Figure 9 yes Figure 8 A schematic diagram of the frontal structure of the lenticule in the middle compound eye.

[0040] Figure 10 This is a three-dimensional structural diagram of the compound eye lens in Embodiment 5 of this disclosure, wherein the first substrate and the second substrate have a first state.

[0041] Figure 11 This is a three-dimensional structural diagram of the compound eye lens in Embodiment 5 of this disclosure, wherein the first substrate and the second substrate have a second state.

[0042] Figure 12 This is a schematic diagram of the structure of an optomechanism in one embodiment provided in this disclosure.

[0043] Figure 13 This is a schematic diagram of the compound eye lens and light spot in one embodiment provided in this disclosure.

[0044] Explanation of main component symbols

[0045] Compound eye lenses 100°, 100°, 200°, 300°, 400°, 500°

[0046] Substrate 1

[0047] First substrate 11

[0048] Second substrate 12

[0049] Micromirror units 3', 3, 3a, 3b, 3c, 3d, 3n, with long side 31

[0050] Short side 32

[0051] Microscope Group 5

[0052] Group 1 Microscope 51

[0053] Group 2 Microscope 52

[0054] Group 3 Microscope 53

[0055] Group 4 Microscope 54

[0056] Group 55

[0057] Group 6 Microscope 56

[0058] Group n micromirrors 5n

[0059] Optical Engine 700

[0060] Light source module 71

[0061] Light source L1

[0062] Lighting optical path module 73

[0063] Depolarizer 731

[0064] First beam shaping module 735

[0065] 7351 Spot Shaping Lens

[0066] Second beam shaping module 737

[0067] Spectrometer 739

[0068] Optical modulation chip 75

[0069] Image light L2

[0070] Lens Module 77

[0071] Length a

[0072] Optical axis o

[0073] Light spot L

[0074] First half working angle α

[0075] Second half working angle β

[0076] First direction X

[0077] Second direction Y

[0078] Third direction Z Detailed Implementation

[0079] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0080] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this article are for illustrative purposes only.

[0081] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0082] Common projection devices typically include a light source, an illumination path, and an imaging chip. The illumination path is used to project the light emitted from the light source onto the imaging chip. Because the illumination path is prone to uneven illumination, one or two compound eye lenses are usually used to homogenize the light. Currently, commonly used compound eye lenses typically consist of multiple micromirror units of the same size arranged in an array.

[0083] Please see Figure 1 Compared with the compound eye lens of this disclosure, a compound eye lens 100' is provided with multiple micromirror units 3' of the same size arranged in an array. However, since the micromirror units 3' are small in size, the light emitted from a single micromirror unit 3' of the compound eye lens 100' already has a diffraction effect. Therefore, the light emitted from multiple micromirror units 3' with diffraction effect will produce interference fringes between each other. The light beams emitted from multiple micromirror units 3' of the same size arranged in an array superimpose with each other, making the interference fringes more obvious, thereby affecting the display effect.

[0084] When the light incident on the compound eye lens 100' is a superposition of multiple light rays of different wavelengths, since the spacing of the interference fringes is proportional to the wavelength of the light, the light rays of different wavelengths exiting the compound eye lens 100' will form fringes of different colors and different spacings. When the aforementioned compound eye lens 100' is used in the optical engine of a projection device, the interference fringes are projected onto the imaging chip, thereby forming fringes of different colors and different spacings on the displayed image, thus affecting the display effect.

[0085] Example 1

[0086] Please refer to the following: Figure 2 and Figure 3 The compound eye lens 100 provided in Embodiment 1 of this disclosure includes a substrate 1 and a plurality of micromirror units 3. The plurality of micromirror units 3 are disposed on opposite side surfaces of the substrate 1. The plurality of micromirror units 3 form at least two micromirror groups 5, and the micromirror units 3 in the same micromirror group 5 have the same shape and size. The micromirror units 3 corresponding to at least two adjacent micromirror groups 5 are staggered. Specifically, the projection of the micromirror unit 3 along a first direction X perpendicular to the surface of the substrate 1 is rectangular, and the dimensions of the projection of the micromirror units 3 along the surface of the substrate 1 in the same micromirror group 5 are the same. The rectangle formed by the projection of each micromirror unit 3 in the first direction X includes a long side 31 and a short side 32 connected to the long side 31. Each long side 31 is parallel to a second direction Y, and each short side 32 is parallel to a third direction Z. The misalignment setting refers to the fact that the micromirror units 3 of at least two adjacent micromirror groups 5 are not aligned, that is, the sides (long side 31 or short side 32) of the micromirror units 3 between at least two adjacent micromirror groups 5 extending in the same direction (second direction Y or third direction Z) are not on the same straight line; for example, the long side of the lens unit 3a between the first micromirror group 51 and the second micromirror group 52 is not on the same straight line as the long side of the lens unit 3b, and the long side of the lens unit 3a and the long side of the lens unit 3b have a misaligned length.

[0087] Each micromirror group 5 of the compound eye lens 100 includes a plurality of micromirror units 3 disposed on two opposing surfaces of the substrate 1 along the first direction X. The projection of each micromirror unit 3 on one surface coincides with the projection of a micromirror unit 3 on the other surface in the first direction X. For example, the first micromirror group 51 includes a plurality of micromirror units 3 (such as 3a and 3d) disposed on two opposing surfaces of the substrate 1 along the first direction X. The projection of each micromirror unit 3a (3d) on one surface coincides with the projection of a micromirror unit 3d (3a) on the other surface in the first direction X. Specifically, each micromirror unit 3 disposed on the opposing surfaces of the substrate 1 protrudes in a direction away from the substrate 1, that is, each micromirror unit 3 is equivalent to a convex lens structure. In addition, each micromirror unit 3 disposed on the opposing surfaces of the substrate 1 may also be recessed in a direction closer to the substrate 1, that is, each micromirror unit 3 is equivalent to a concave lens structure. The specific arrangement depends on the user's needs, and this disclosure does not impose any limitations.

[0088] Specifically, the material of substrate 1 is any one of glass, polyethylene terephthalate (PET), polycarbonate (PC), and polymethyl methacrylate (PMMA). The material of substrate 1 is not limited to the above materials; any light-transmitting material can be used, and this disclosure does not impose any restrictions. It should be noted that "light transmission" refers to high transmittance of light at specific wavelengths (especially visible light, infrared light, and ultraviolet light). In this embodiment, the compound eye lens 100 is a one-piece molded structure. For example, the material of substrate 1 can be poured into a mold, and then the compound eye lens 100 can be demolded by injection molding. Alternatively, the compound eye lens 100 can also have the micromirror units 3 imprinted on both sides of the substrate 1 material by high-temperature molding or etched on both sides of the substrate 1 material by laser etching, depending on the user's needs, and this disclosure does not impose any restrictions. In other embodiments, the material of the substrate 1 is different from the material of the micromirror unit 3; for example, multiple micromirror units 3 can be processed, and then the micromirror units 3 can be bonded to the two side surfaces of the substrate 1 in a staggered manner using an adhesive. The specific processing method is determined according to the user's needs, and this disclosure does not impose any limitations. When the material of the substrate 1 is different from the material of the micromirror unit 3, it can affect the refractive index of the compound eye lens 100, thereby affecting the direction of the emitted light, and thus improving the flexibility of the compound eye lens 100 in use.

[0089] Please see Figure 4The length 'a' of the long side 31 projected along the first direction X of the micromirror unit 3 is in the range of 0.5mm-1mm; for example, length 'a' can be any length between 0.5-0.6mm, 0.6-0.7mm, 0.7-0.8mm, 0.8-0.9mm, or 0.9-1.0mm, and this disclosure does not impose any limitation on it. It should be noted that, due to processing requirements, the shape of the micromirror unit 3 located at the edge of the compound eye lens 100 may be different from the shape and size of the micromirror unit 3 located at other positions of the compound eye lens 100. For example, when the compound eye lens 100 needs to be processed into a cuboid, since the edge of the compound eye lens 100 needs to be cut, the edge position needs to be shaped. Therefore, the shape of the micromirror unit 3 located at the edge of the compound eye lens 100 may be different from the shape and size of the micromirror unit 3 located at other positions of the compound eye lens 100.

[0090] Please refer to the following: Figure 4 and Figure 5 The first half-working angle α is defined as the angle between each micromirror unit 3 and the optical axis o in the second direction Y, and the range of the first half-working angle α is 5°-7° (e.g., 5°-6° or 6°-7°). The second half-working angle β is defined as the angle between each micromirror unit 3 and the optical axis o in the third direction Z, and the range of the second half-working angle β is 3°-4°. Specifically, the half-working angle (the first half-working angle α and the second half-working angle β) refers to the maximum angle at which the micromirror unit 3 can achieve a homogenizing effect on the incident light. The range of the half-working angle determines the range of homogenization of the incident light by the micromirror unit 3, and also affects the divergence angle of the light emitted from the micromirror unit 3.

[0091] Specifically, multiple micromirror units 3 are arranged in an array along a surface perpendicular to the substrate 1, forming three micromirror groups 5 arranged sequentially, such as a first micromirror group 51, a second micromirror group 52, and a third micromirror group 53. Each micromirror group 5 extends along a third direction Z on one side surface of the substrate 1. The long sides 31 of the projections of at least two adjacent micromirror groups 5 corresponding to micromirror units 3 in the first direction X are staggered. For example, the long side 31 of the projection of micromirror unit 3a corresponding to the first micromirror group 51 is staggered with the long side 31 of the projection of micromirror unit 3b corresponding to the second micromirror group 52; the long side 31 of the projection of micromirror unit 3b corresponding to the second micromirror group 52 is staggered with the long side 31 of the projection of micromirror unit 3c corresponding to the third micromirror group 53.

[0092] The compound eye lens 100 provided in Embodiment 1 of this disclosure, by setting at least two adjacent micromirror groups 5 with their corresponding micromirror units 3 misaligned, each micromirror group 5 extends along the third direction Z on one side surface of the substrate 1, when light shines on an adjacent micromirror group 5 with misaligned micromirror units 3, the spacing of the two types of interference fringes formed by the emitted light is inconsistent, causing the positions of the two types of interference fringes to change, thereby causing the interference fringes between different micromirror groups 5 to at least partially cancel each other out, thereby destroying the periodicity of the interference fringes in space, which can effectively alleviate the instability of the display image caused by the interference fringes.

[0093] Example 2

[0094] Please see Figure 6 The difference between Embodiment 2 and Embodiment 1 is that the compound eye lens 200 has multiple micromirror units 3 forming six micromirror groups 5 (e.g., first micromirror group 51, second micromirror group 52, third micromirror group 53, fourth micromirror group 54, fifth micromirror group 55, and sixth micromirror group 56), with at least two adjacent micromirror groups 5 having their corresponding micromirror units 3 staggered (e.g., the micromirror unit 3 corresponding to the first micromirror group 51 and the micromirror unit 3 corresponding to the second micromirror group 52 are staggered). Multiple micromirror units 3 can form more micromirror groups 5. The more staggered the micromirror units 3, the greater the change in fringe spacing when light rays emitted from multiple micromirror units 3 interfere, resulting in a greater change in the fringe positions of the two interference fringes, and a greater degree of mutual cancellation of interference fringes between different micromirror groups 5, thus mitigating the instability of the display image caused by interference fringes to a greater extent. However, as the number of staggered micromirror units 3 increases, the light efficiency of the light rays emitted from the compound eye lens 200 also becomes affected. The number of misaligned micromirror units 3 can be determined according to the user's needs, and this disclosure does not impose any restrictions.

[0095] Example 3

[0096] Please see Figure 7 The difference between Embodiment 3 and Embodiment 1 is that each micromirror group 5 extends along the second direction Y on one side surface of the substrate 1. In Embodiment 3, multiple micromirror units 3 of the compound eye lens 300 are arranged in an array along a surface perpendicular to the substrate 1, and four micromirror groups 5 are formed in sequence, such as the first micromirror group 51, the second micromirror group 52, the third micromirror group 53, and the fourth micromirror group 54. Each micromirror group 5 extends along the second direction Y on one side surface of the substrate 1. The short sides 32 of the projections of at least two adjacent micromirror groups 5 corresponding to micromirror units 3 along the first direction X are staggered. For example, the short side 32 of the projection of the micromirror unit 3a corresponding to the first micromirror group 51 is staggered with the short side 32 of the projection of the micromirror unit 3b corresponding to the second micromirror group 52.

[0097] Example 4

[0098] Please refer to the following: Figure 8 and Figure 9 The difference between Embodiment 4 and Embodiment 3 is that Embodiment 4 has more micromirror units 3 with staggered arrangement than Embodiment 3. In Embodiment 4, the multiple micromirror units 3 of the compound eye lens 400 are arranged in an array along the surface perpendicular to the substrate 1, and form multiple micromirror groups 5 arranged sequentially, such as the first micromirror group 51, the second micromirror group 52, the third micromirror group 53, and the nth micromirror group 5n. Each micromirror group 5 extends along the second direction Y on one side surface of the substrate 1. The short sides 32 of the projections of at least two adjacent micromirror groups 5 corresponding to micromirror units 3 along the first direction X are staggered. For example, the short side 32 of the projection of the micromirror unit 3a corresponding to the first micromirror group 51 is staggered with the short side 32 of the projection of the micromirror unit 3b corresponding to the second micromirror group 52; the short side 32 of the projection of the micromirror unit 3n corresponding to the nth micromirror group 5n is staggered with the short side 32 of the projection of the micromirror unit 3 corresponding to the adjacent micromirror group 5, where n is greater than 2.

[0099] Example 5

[0100] Please see Figure 10The difference between Embodiment 5 and Embodiment 1 is that the multiple micromirror units 3 in each micromirror group 5 can also be disposed on the same surface of the substrate 1. Therefore, the micromirror units 3 can be disposed on the same surface of the substrate 1, and the compound eye lenses (100 and 500) can be single-sided compound eye lenses or double-sided compound eye lenses. In Embodiment 5, when the substrate 1 of the compound eye lens 500 includes a first substrate 11 and a second substrate 12 arranged parallel to the first substrate 11, the plurality of micromirror units 3 in each micromirror group 5 are respectively disposed on the side surface of the first substrate 11 away from the second substrate 12 and the side surface of the second substrate 12 away from the first substrate 11; for example, when the plurality of micromirror units 3 form a first micromirror group 51, a second micromirror group 52 and a third micromirror group 53, the plurality of micromirror units 3 in the first micromirror group 51 are respectively disposed on the side surface of the first substrate 11 away from the second substrate 12 and the side surface of the second substrate 12 away from the first substrate 11; the plurality of micromirror units 3 in the second micromirror group 52 are respectively disposed on the side surface of the first substrate 11 away from the second substrate 12 and the side surface of the second substrate 12 away from the first substrate 11; the plurality of micromirror units 3 in the third micromirror group 53 are respectively disposed on the side surface of the first substrate 11 away from the second substrate 12 and the side surface of the second substrate 12 away from the first substrate 11. When multiple micromirror units 3 in each micromirror group 5 are disposed on the same surface of the substrate 1, in the first state, the first substrate 11 and the second substrate 12 are bonded together. Specifically, the materials of the first substrate 11 and the second substrate 12 are any one of glass, PET, PC and PMMA. The materials of the first substrate 11 and the second substrate 12 can be the same or different, and this disclosure does not impose any restrictions.

[0101] Please see Figure 11 When multiple micromirror units 3 in each micromirror group 5 are disposed on the same surface of the substrate 1, in the second state, an air medium is filled between the first substrate 11 and the second substrate 12. When multiple micromirror units 3 in each micromirror group 5 are disposed on the same surface of the substrate 1, it is beneficial to reduce processing costs. The specific method depends on the user's needs, and this disclosure does not impose any limitations.

[0102] The compound eye lens 100 (200, 300, 400, 500) provided in the above embodiments of this disclosure, by setting at least two adjacent micromirror groups 5 with their corresponding micromirror units 3 misaligned (each micromirror group 5 extends along the second direction Y or the third direction Z on one side surface of the substrate 1), when light shines on adjacent micromirror groups 5 with misaligned micromirror units 3, the interference fringes between different micromirror groups 5 at least partially cancel each other out, thereby destroying the periodicity of the interference fringes in space, which can effectively alleviate the instability of the display image caused by the interference fringes.

[0103] Please refer to the following: Figure 2 and Figure 12The optomechanism 700 provided in this embodiment includes a light source module 71 and an illumination optical path module 73. The light source module 71 is used to emit light source light L1. The illumination optical path module 73 is used to guide the light source light L1 and homogenize the light source light L1. The illumination optical path module 73 includes compound eye lenses 100 (200, 300, 400, 500) in any embodiment. The optomechanism 700 may also include a light modulation chip 75 and a lens module 77. The light modulation chip 75 is used to receive the light source light L1 homogenized by the illumination optical path module 73 and modulate the light source light L1 into image light L2. The lens module 77 is used to receive the image light L2 and project the image light L2 out.

[0104] The illumination optical path module 73 may further include a depolarizer 731, a first beam shaping module 735, a second beam shaping module 737, and a beam splitter 739. The depolarizer 731 is disposed on the light-emitting side of the light source module 71. The first beam shaping module 735 is disposed on both the light-emitting side of the light source module 71 and the light-emitting side of the depolarizer 731, with the depolarizer 731 positioned between the light source module 71 and the first beam shaping module 735. The second beam shaping module 737 is disposed on the light-emitting side of the first beam shaping module 735. The depolarizer 731 receives the light source light L1 emitted from the light source module 71 and converts the polarized light L1 into unpolarized light L1.

[0105] The first beam shaping module 735 includes two spot-shaping lenses 7351, which are used to shape the light spot formed by the light emitted from the light source L1 (adjusting the shape of the cross-sectional light spot L), thereby enabling the redistribution or combination of light from different spaces and angles, which is beneficial for eliminating speckle. The spot-shaping lens 7351 can be either a convex or concave lens, as long as it can achieve the purpose of shaping the light spot; this disclosure does not limit the lens type of the spot-shaping lens 7351. The second beam shaping module 737 also includes two spot-shaping lenses 7351.

[0106] A beam splitter 739 is disposed on the light-incident side of the light modulation chip 75 and the light-outcident side of the second beam shaping module 737. The beam splitter 739 receives the light source light L1 emitted from the second beam shaping module 737 and guides the light source light L1 to the light modulation chip 75. After the light modulation chip 75 receives the light source light L1 homogenized by the illumination optical path module 73 and modulates the light source light L1 into image light L2, the beam splitter 739 further guides the image light L2 to the lens module 77, which projects the image light L2 onto the projection medium, thereby forming an image.

[0107] In this embodiment, the illumination optical path module 73 includes two compound eye lenses 100 (200, 300, 400, 500), which are disposed between the light source module 71 and the first beam shaping module 735, and between the first beam shaping module 735 and the second beam shaping module 737. In other embodiments, the illumination optical path module 73 may include only one compound eye lens 100 (200, 300, 400, 500) as described in any of the above embodiments. The compound eye lens 100 (200, 300, 400, 500) is disposed between the light source module 71 and the first beam shaping module 735, or between the first beam shaping module 735 and the second beam shaping module 737. That is, the compound eye lenses 100 (200, 300, 400, 500) are disposed on the light-emitting side of the first beam shaping module 735 and the light-incident side of the second beam shaping module 737, or disposed on the light-emitting side of the light source module 71 and the light-incident side of the first beam shaping module 735.

[0108] Please refer to the following: Figure 4 and Figure 12 In this embodiment, the aspect ratio of the rectangle projected by the micromirror unit 3 in the first direction X is no more than 10% different from the aspect ratio of the optical modulation chip 75. Specifically, the aspect ratio of the micromirror unit 3 determines the aspect ratio of the light spot projected onto the optical modulation chip 75. By setting the aspect ratio of the rectangle projected by the micromirror unit 3 in the first direction X to be similar to that of the optical modulation chip 75, the aspect ratio of the light spot projected onto the optical modulation chip 75 after modulation by the second beam shaping module 737 is similar to that of the optical modulation chip 75. This allows the light source L1 to illuminate the optical modulation chip 75 as much as possible, thereby improving the light efficiency of the optical engine 700.

[0109] Please refer to the following: Figure 12 and Figure 13The compound eye lenses 100 (200, 300, 400, 500) are used to receive light source L1 emitted from the light source module 71 or light source L1 emitted from the first beam shaping module 735. The difference in light energy of the light source L1 received by the multiple micromirror groups 5 does not exceed 10%. When the light source L1 illuminates the compound eye lenses 100 (200, 300, 400, 500), the difference in light energy between the portion of light source L1 received by each micromirror group 5 and the portion of light source L1 received by the other micromirror groups 5 does not exceed 10%. This ensures that the peaks and troughs of the wave functions of the multiple light rays emitted from different micromirror groups 5 are superimposed and canceled out, resulting in a uniform distribution of light energy among the multiple emitted light rays. For example, when the cross-sectional spot L of the light source L1 incident on the compound eye lenses 100 (200, 300, 400, 500) is hexagonal and When the illuminance distribution is uniform, by setting six micromirror groups 5 (e.g., the first micromirror group 51, the second micromirror group 52, the third micromirror group 53, the fourth micromirror group 54, the fifth micromirror group 55, and the sixth micromirror group 56), the edge of the largest inscribed rectangle of the hexagon coincides with the edge of the four adjacent micromirror groups 5, so that the area difference of the hexagonal light spots L corresponding to the multiple micromirror groups 5 does not exceed 10%, thereby ensuring that the light energy of the portion of the light source L1 received by each micromirror group 5 does not differ from the light energy of the portion of the light source L1 received by the other micromirror groups 5 by no more than 10%.

[0110] The optical engine 700 provided in this embodiment, by setting the compound eye lens 100 (200, 300, 400, 500) as described in any of the above examples, and by setting at least two adjacent micromirror groups 5 with misaligned micromirror units 3, when the light source L1 irradiates the adjacent micromirror groups 5 with misaligned micromirror units 3, the spacing of the two types of interference fringes formed by the emitted light is inconsistent, causing the fringe positions of the two types of interference fringes to change. This causes the interference fringes between different micromirror groups 5 to at least partially cancel each other out, thereby destroying the periodicity of the interference fringes in space. This can effectively alleviate the instability of the display image caused by the interference fringes and is beneficial to improving the overall display effect of the optical engine 700.

[0111] This disclosure also provides a projector that includes the optical engine 700 described in the above embodiments.

[0112] The above description is merely an embodiment of this disclosure and does not limit the patent scope of this disclosure. Any equivalent structural or procedural transformations made using the content of this disclosure and its drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this disclosure.

Claims

1. A compound eye lens characterized by, The application relates to a compound eye lens, which comprises: a substrate; and a plurality of micro-mirror units arranged on the surface of the substrate; wherein the plurality of micro-mirror units form at least two micro-mirror groups, the micro-mirror units in the same micro-mirror group are of the same shape and size, the micro-mirror units corresponding to at least two adjacent micro-mirror groups are arranged in a staggered manner so that the interference fringes between different micro-mirror groups are at least partially offset, and the plurality of micro-mirror groups are configured to have a difference of no more than 10% in the area of a light spot of a light source light to be received, so that the difference in the light energy of the light source light received by the plurality of micro-mirror groups is no more than 10%.

2. The fly's eye lens of claim 1, wherein The projection of the micro-mirror units in a first direction perpendicular to the surface of the substrate is a rectangle, each micro-mirror unit projects a rectangle in the first direction, the rectangle comprises a long side and a short side connected to the long side, each long side is parallel to a second direction, and each short side is parallel to a third direction.

3. The fly's eye lens of claim 2, wherein Each micro-mirror group extends along the second direction on one side surface of the substrate, and the short sides of the projections of the micro-mirror units corresponding to at least two adjacent micro-mirror groups in the first direction are arranged in a staggered manner.

4. The fly's eye lens of claim 2, wherein Each micro-mirror group extends along the third direction on one side surface of the substrate, and the long sides of the projections of the micro-mirror units corresponding to at least two adjacent micro-mirror groups in the first direction are arranged in a staggered manner.

5. The fly's eye lens of claim 2, wherein The size of the long side of the projection of the micro-mirror units in the first direction ranges from 0.5 mm to 1 mm.

6. The fly's eye lens of claim 2, wherein The half working angle of each micro-mirror unit in the second direction ranges from 5 to 7 degrees, and the half working angle of each micro-mirror unit in the third direction ranges from 3 to 4 degrees.

7. The fly's eye lens of claim 2, wherein Each micro-mirror group comprises a plurality of micro-mirror units arranged on two opposite surfaces of the substrate in the first direction, and the projection of each micro-mirror unit on one surface in the first direction is coincident with that of one micro-mirror unit on the other surface.

8. The fly's eye lens of claim 1, wherein The material of the substrate is different from that of the micro-mirror units.

9. The fly's eye lens of claim 1, wherein The substrate comprises a first substrate and a second substrate arranged in parallel with the first substrate, and the plurality of micro-mirror units in each micro-mirror group are arranged on one side surface of the first substrate away from the second substrate and on one side surface of the second substrate away from the first substrate. The first substrate is attached to the second substrate or air medium is filled between the first substrate and the second substrate.

10. An optical engine characterized by, The application also relates to a light source module for emitting light source light and an illumination light path module for guiding and homogenizing the light source light, wherein the illumination light path module comprises the compound eye lens. The compound eye lens is used for receiving the light source light emitted from the light source module, and the difference in the light energy of the light source light received by the plurality of micro-mirror groups is no more than 10%. The light machine further comprises a light modulation chip and a lens module, the light modulation chip is used for receiving the light source light homogenized by the illumination light path module and modulating the light source light into image light, and the lens module is used for receiving the image light and projecting the image light out. ​ 11. The optical engine of claim 10, wherein, ​ 12. The optical engine of claim 10, wherein, ​ 13. The optical engine of claim 10, wherein, The illumination light path module further comprises a first light beam shaping module and a second light beam shaping module; The first light beam shaping module is arranged on the light emitting side of the light source module, and the second light beam shaping module is arranged on the light emitting side of the first light beam shaping module; The compound eye lens is arranged on the light emitting side of the first light beam shaping module and the light entering side of the second light beam shaping module or arranged on the light emitting side of the light source module and the light entering side of the first light beam shaping module.

14. The optical engine of claim 13, wherein, Another compound eye lens as claimed in any one of claims 1-9 is further arranged between the light source module and the first light beam shaping module or between the first light beam shaping module and the second light beam shaping module.

15. A projection apparatus, characterized by, Comprise: An optical machine as claimed in any one of claims 10-14.

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