Micro-lens array lens module with diaphragm and projection device comprising micro-lens array lens module
By introducing a stop array into the microlens array lens module, crosstalk and blur problems of different optical channels are solved, and the independence and clarity of each sub-optical channel is achieved.
Patent Information
- Application Number
- CN202323477121.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-20
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2033-12-20
AI Technical Summary
Existing lens modules based on microlens arrays will cause crosstalk and miscellaneous problems in different optical channels when incident light at large angles.
A microlens array lens module with apertures is designed. By setting the aperture array on the inlet or outgoing surface of the projection mirror array, each sub-diaphragm corresponds to a sub-optical channel, allowing only light from its corresponding sub-optical channel. Pass, blocking light from other sub-optical channels.
It effectively avoids crosstalk and blur problems of different optical channels, ensuring the independence and clarity of each sub-optical channel.
Smart Images
Figure CN222439821U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an optical lens, in particular to a micro-lens array lens module with an aperture. Background Art
[0002] The microlens array is an array composed of lenses with a clear aperture and relief depth of micrometers, and each lens forms a separate optical channel. Like traditional lenses, its smallest functional unit can also be a spherical lens, aspherical lens, cylindrical lens, prism, etc. It can also achieve focusing, imaging, beam transformation and other functions at a micro-optical angle. Moreover, due to its small unit size and high integration, it can form many new optical systems and complete functions that traditional optical components cannot complete.
[0003] In existing lens modules based on microlens arrays, light incident on the microlens array at a large angle will be imaged through different optical channels, causing crosstalk between different channels and generating stray image problems. Utility Model Content
[0004] Purpose of the utility model: The purpose of the utility model is to provide a microlens array lens module with an aperture and a projection device containing the same, so as to solve the crosstalk and stray image problems of different optical channels in the prior art.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A microlens array lens module with an aperture comprises a field lens array, a pattern array, a projection lens array, and a substrate. The field lens array, the pattern array, and the projection lens array are arranged in sequence along the light propagation direction. The substrate is arranged between the pattern array and the projection lens array. Each sub-field lens in the field lens array, each sub-pattern in the pattern array, and each sub-projection lens in the projection lens array correspond to each other. The corresponding sub-field lenses, sub-patterns, and sub-projection lenses together constitute a sub-optical channel. The invention also comprises an aperture array, which is arranged on the light incident surface or the light exit surface of the projection lens array. Each sub-aperture of the aperture array corresponds to a sub-optical channel. The sub-aperture only allows light from its corresponding sub-optical projection channel to pass through, while preventing light from other sub-optical projection channels from passing through.
[0007] Furthermore, a first spacing substrate is arranged between the field lens array and the pattern array, and a second spacing substrate is arranged between the substrate and the projection lens array.
[0008] Furthermore, it also includes a prism array, which is arranged on a side of the projection lens array away from the light source, and each sub-prism of the prism array corresponds to a sub-optical channel.
[0009] Furthermore, the microprism array is one layer or multiple layers, and the multiple layers of microprism array are arranged in sequence along the light propagation direction.
[0010] Furthermore, it also includes a light-blocking wall, which is arranged at the periphery of each sub-optical channel to fully or partially surround the sub-optical channel, and the light propagating in the sub-optical channel is prevented from propagating to other sub-optical channels through the light-blocking wall.
[0011] Furthermore, the light blocking wall is located between the field lens array and the projection lens array.
[0012] Furthermore, the length of the light-blocking wall is less than or equal to the distance between the light-emitting surface of the field lens array and the light-incident surface of the projection lens array.
[0013] A projection device is characterized by comprising a light source, a screen and the above-mentioned micro-lens array lens module arranged between the light source and the screen.
[0014] Beneficial effect: Each sub-aperture of the aperture array corresponds to a sub-optical channel, and the sub-aperture blocks light from other sub-optical projection channels, thereby avoiding crosstalk and stray image problems of different optical channels. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 Schematic diagram of the structure of the microlens array lens module of the first embodiment;
[0016] Figure 2 This is a schematic diagram of the structure of a microlens array lens module of Example 2;
[0017] Figure 3 This is a schematic diagram of the structure of a microlens array lens module of Example 3;
[0018] Figure 4 This is a schematic diagram of the structure of a microlens array lens module of Embodiment 4;
[0019] Figure 5 This is a schematic diagram of the structure of a microlens array lens module of Embodiment 5;
[0020] Figure 6 This is a schematic diagram of the structure of a microlens array lens module of Example 6;
[0021] Figure 7 This is a schematic diagram of the structure of a microlens array lens module of Embodiment 7;
[0022] Figure 8 is a schematic diagram of the structure of a microlens array lens module of Embodiment 8;
[0023] Fig. 9 is a schematic diagram of the structure of a microlens array lens module of Embodiment 9;
[0024] Fig.10 is a schematic diagram of the structure of a microlens array lens module of Embodiment 10;
[0025] Fig.11 This is a schematic diagram of a state where the light-blocking wall completely surrounds the optical channel;
[0026] Fig.12 This is a schematic diagram of a state where the light-blocking wall partially surrounds the optical channel;
[0027] Fig.13 is a schematic diagram of the structure of a projection device according to the eleventh embodiment;
[0028] In the figure: 1-field mirror array; 2-pattern array; 3-projection mirror array; 4-aperture array; 5-substrate; 6-first spacing substrate; 7-second spacing substrate; 8-prism array; 9-light blocking wall; 10-sub-optical channel; 11-light source; 12-screen. DETAILED DESCRIPTION
[0029] The utility model is further explained below in conjunction with the accompanying drawings.
[0030] Embodiment 1
[0031] like Figure 1 As shown, a microlens array lens module with an aperture comprises a field lens array 1, a pattern array 2, a projection lens array 3, and a substrate 5. The field lens array 1, the pattern array 2, and the projection lens array 3 are arranged in sequence along the light propagation direction. The substrate 5 is arranged between the pattern array 2 and the projection lens array 3. Each sub-field lens in the field lens array 1, each sub-pattern in the pattern array 2, and each sub-projection lens in the projection lens array 3 correspond to each other. The corresponding sub-field lenses, sub-patterns, and sub-projection lenses together constitute a sub-optical channel. The module also comprises an aperture array 4. The aperture array 4 is arranged on the light incident surface of the projection lens array 3. Each sub-aperture of the aperture array 4 corresponds to a sub-optical channel. The sub-aperture only allows light from its corresponding sub-optical projection channel to pass through, and prevents light from other sub-optical projection channels from passing through.
[0032] During production, the pattern array 2 and the aperture array 4 are first solidified on both sides of the substrate 5 respectively, and then the field lens array 1 is solidified on the pattern array 2 , and the projection lens array 3 is solidified on the aperture array 4 .
[0033] Embodiment 2
[0034] like Figure 2As shown, a microlens array lens module with an aperture comprises a field lens array 1, a pattern array 2, a projection lens array 3, and a substrate 5. The field lens array 1, the pattern array 2, and the projection lens array 3 are arranged in sequence along the light propagation direction. The substrate 5 is arranged between the pattern array 2 and the projection lens array 3. Each sub-field lens in the field lens array 1, each sub-pattern in the pattern array 2, and each sub-projection lens in the projection lens array 3 correspond to each other. The corresponding sub-field lenses, sub-patterns, and sub-projection lenses together constitute a sub-optical channel. The module also comprises an aperture array 4. The aperture array 4 is arranged on the light exit surface of the projection lens array 3. Each sub-aperture of the aperture array 4 corresponds to a sub-optical channel. The sub-aperture only allows light from its corresponding sub-optical projection channel to pass through, and prevents light from other sub-optical projection channels from passing through.
[0035] During production, the pattern array 2 and the projection lens array 3 are first solidified on both sides of the substrate 5 respectively, and then the field lens array 1 is solidified on the pattern array 2 , and the aperture array 4 is solidified on the projection lens array 3 .
[0036] Embodiment 3
[0037] like Figure 3 As shown, a microlens array lens module with an aperture comprises a field lens array 1, a pattern array 2, a projection lens array 3, and a substrate 5. The field lens array 1, the pattern array 2, and the projection lens array 3 are arranged in sequence along the light propagation direction. The substrate 5 is arranged between the pattern array 2 and the projection lens array 3. Each sub-field lens in the field lens array 1, each sub-pattern in the pattern array 2, and each sub-projection lens in the projection lens array 3 correspond to each other. The corresponding sub-field lenses, sub-patterns, and sub-projection lenses together constitute a sub-optical channel. The module also comprises an aperture array 4. The aperture array 4 is arranged on the light incident surface of the projection lens array 3. Each sub-aperture of the aperture array 4 corresponds to a sub-optical channel. The sub-aperture only allows light from its corresponding sub-optical projection channel to pass through, and prevents light from other sub-optical projection channels from passing through.
[0038] In addition, a first spacing substrate 6 is arranged between the field lens array 1 and the pattern array 2 , and a second spacing substrate 7 is arranged between the substrate 5 and the projection lens array 3 .
[0039] During production, the pattern array 2 is solidified on one side of the substrate 5, the field lens array 1 is solidified on one side of the first spacer substrate 6, the other side of the first spacer substrate 6 is bonded to the side of the substrate 5 with the pattern array 2, the aperture array 4 is solidified on one side of the second spacer substrate 7, the projection lens array 3 is solidified on the aperture array 4, and the other side of the second spacer substrate 7 is bonded to the other side of the substrate 5 without the pattern array 2.
[0040] By setting the first spacer substrate 6, the processing and production of the field lens array 1 is facilitated. By setting the second spacer substrate 7, the pattern array 2 and the projection lens array 3 are kept at a designed distance to avoid the gap between them being too small. At the same time, it helps to reduce the thickness of the substrate 5, reduce the cutting difficulty, and thus improve the product yield.
[0041] Embodiment 4
[0042] like Figure 4 As shown, a microlens array lens module with an aperture comprises a field lens array 1, a pattern array 2, a projection lens array 3, and a substrate 5. The field lens array 1, the pattern array 2, and the projection lens array 3 are arranged in sequence along the light propagation direction. The substrate 5 is arranged between the pattern array 2 and the projection lens array 3. Each sub-field lens in the field lens array 1, each sub-pattern in the pattern array 2, and each sub-projection lens in the projection lens array 3 correspond to each other. The corresponding sub-field lenses, sub-patterns, and sub-projection lenses together constitute a sub-optical channel. The module also comprises an aperture array 4. The aperture array 4 is arranged on the light exit surface of the projection lens array 3. Each sub-aperture of the aperture array 4 corresponds to a sub-optical channel. The sub-aperture only allows light from its corresponding sub-optical projection channel to pass through, and prevents light from other sub-optical projection channels from passing through.
[0043] In addition, a first spacing substrate 6 is arranged between the field lens array 1 and the pattern array 2 , and a second spacing substrate 7 is arranged between the substrate 5 and the projection lens array 3 .
[0044] During production, the pattern array 2 is solidified on one side of the substrate 5, the field lens array 1 is solidified on one side of the first spacer substrate 6, the other side of the first spacer substrate 6 is bonded to the side of the substrate 5 with the pattern array 2, the projection lens array 3 is solidified on one side of the second spacer substrate 7, the aperture array 4 is solidified on the projection lens array 3, and the other side of the second spacer substrate 7 is bonded to the other side of the substrate 5 without the pattern array 2.
[0045] Embodiment 5
[0046] like Figure 5As shown, a microlens array lens module with an aperture comprises a field lens array 1, a pattern array 2, a projection lens array 3, and a substrate 5. The field lens array 1, the pattern array 2, and the projection lens array 3 are arranged in sequence along the light propagation direction. The substrate 5 is arranged between the pattern array 2 and the projection lens array 3. Each sub-field lens in the field lens array 1, each sub-pattern in the pattern array 2, and each sub-projection lens in the projection lens array 3 correspond to each other. The corresponding sub-field lenses, sub-patterns, and sub-projection lenses together constitute a sub-optical channel. The module also comprises an aperture array 4. The aperture array 4 is arranged on the light incident surface of the projection lens array 3. Each sub-aperture of the aperture array 4 corresponds to a sub-optical channel. The sub-aperture only allows light from its corresponding sub-optical projection channel to pass through, and prevents light from other sub-optical projection channels from passing through.
[0047] It also includes a prism array 8, which is arranged on the side of the projection lens array 3 away from the light source, and each sub-prism of the prism array 8 corresponds to a sub-optical channel. The sub-prisms are used to achieve targeted deflection of the light of the corresponding sub-optical projection channel.
[0048] In this embodiment, the prism array 8 is a layer.
[0049] Embodiment 6
[0050] like Figure 6 As shown, a microlens array lens module with an aperture comprises a field lens array 1, a pattern array 2, a projection lens array 3, and a substrate 5. The field lens array 1, the pattern array 2, and the projection lens array 3 are arranged in sequence along the light propagation direction. The substrate 5 is arranged between the pattern array 2 and the projection lens array 3. Each sub-field lens in the field lens array 1, each sub-pattern in the pattern array 2, and each sub-projection lens in the projection lens array 3 correspond to each other. The corresponding sub-field lenses, sub-patterns, and sub-projection lenses together constitute a sub-optical channel. The module also comprises an aperture array 4. The aperture array 4 is arranged on the light exit surface of the projection lens array 3. Each sub-aperture of the aperture array 4 corresponds to a sub-optical channel. The sub-aperture only allows light from its corresponding sub-optical projection channel to pass through, and prevents light from other sub-optical projection channels from passing through.
[0051] It also includes a prism array 8, which is arranged on the side of the projection lens array 3 away from the light source, and each sub-prism of the prism array 8 corresponds to a sub-optical channel. The sub-prisms are used to achieve targeted deflection of the light of the corresponding sub-optical projection channel.
[0052] In this embodiment, the prism array 8 has two layers. The two layers of micro-prism arrays are arranged in sequence along the light propagation direction. The two layers of micro-prism arrays are made of different materials, and the two layers of micro-prism arrays are fixed by bonding. The micro-prism arrays 8 made of different materials have different refractive indices and Abbe numbers, which can facilitate the elimination of prism chromatic aberration.
[0053] Embodiment 7
[0054] like Figure 7 As shown, a microlens array lens module with an aperture comprises a field lens array 1, a pattern array 2, a projection lens array 3, and a substrate 5. The field lens array 1, the pattern array 2, and the projection lens array 3 are arranged in sequence along the light propagation direction. The substrate 5 is arranged between the pattern array 2 and the projection lens array 3. Each sub-field lens in the field lens array 1, each sub-pattern in the pattern array 2, and each sub-projection lens in the projection lens array 3 correspond to each other. The corresponding sub-field lenses, sub-patterns, and sub-projection lenses together constitute a sub-optical channel. The module also comprises an aperture array 4. The aperture array 4 is arranged on the light incident surface of the projection lens array 3. Each sub-aperture of the aperture array 4 corresponds to a sub-optical channel. The sub-aperture only allows light from its corresponding sub-optical projection channel to pass through, and prevents light from other sub-optical projection channels from passing through.
[0055] In addition, a first spacing substrate 6 is arranged between the field lens array 1 and the pattern array 2 , and a second spacing substrate 7 is arranged between the substrate 5 and the projection lens array 3 .
[0056] It also includes a prism array 8, which is arranged on the side of the projection lens array 3 away from the light source, and each sub-prism of the prism array 8 corresponds to a sub-optical channel. The sub-prisms are used to achieve targeted deflection of the light of the corresponding sub-optical projection channel.
[0057] In this embodiment, the prism array 8 is a layer.
[0058] Embodiment 8
[0059] like Figure 8 As shown, a microlens array lens module with an aperture comprises a field lens array 1, a pattern array 2, a projection lens array 3, and a substrate 5. The field lens array 1, the pattern array 2, and the projection lens array 3 are arranged in sequence along the light propagation direction. The substrate 5 is arranged between the pattern array 2 and the projection lens array 3. Each sub-field lens in the field lens array 1, each sub-pattern in the pattern array 2, and each sub-projection lens in the projection lens array 3 correspond to each other. The corresponding sub-field lenses, sub-patterns, and sub-projection lenses together constitute a sub-optical channel. The module also comprises an aperture array 4. The aperture array 4 is arranged on the light exit surface of the projection lens array 3. Each sub-aperture of the aperture array 4 corresponds to a sub-optical channel. The sub-aperture only allows light from its corresponding sub-optical projection channel to pass through, and prevents light from other sub-optical projection channels from passing through.
[0060] In addition, a first spacing substrate 6 is arranged between the field lens array 1 and the pattern array 2 , and a second spacing substrate 7 is arranged between the substrate 5 and the projection lens array 3 .
[0061] It also includes a prism array 8, which is arranged on the side of the projection lens array 3 away from the light source, and each sub-prism of the prism array 8 corresponds to a sub-optical channel. The sub-prisms are used to achieve targeted deflection of the light of the corresponding sub-optical projection channel.
[0062] In this embodiment, the prism array 8 has two layers.
[0063] Embodiment 9
[0064] like Fig. 9 As shown, a microlens array lens module with an aperture comprises a field lens array 1, a pattern array 2, a projection lens array 3, and a substrate 5. The field lens array 1, the pattern array 2, and the projection lens array 3 are arranged in sequence along the light propagation direction. The substrate 5 is arranged between the pattern array 2 and the projection lens array 3. Each sub-field lens in the field lens array 1, each sub-pattern in the pattern array 2, and each sub-projection lens in the projection lens array 3 correspond to each other. The corresponding sub-field lenses, sub-patterns, and sub-projection lenses together constitute a sub-optical channel. The module also comprises an aperture array 4. The aperture array 4 is arranged on the light incident surface of the projection lens array 3. Each sub-aperture of the aperture array 4 corresponds to a sub-optical channel. The sub-aperture only allows light from its corresponding sub-optical projection channel to pass through, and prevents light from other sub-optical projection channels from passing through.
[0065] It also includes a light blocking wall 9, which is arranged at the periphery of each sub-optical channel 10 and is located between the field lens array 1 and the projection lens array 3. The length of the light blocking wall 9 is equal to the distance between the light exit surface of the field lens array 1 and the light entrance surface of the projection lens array 3. Fig.11 As shown, the sub-optical channel 10 is fully surrounded by the light-blocking wall 9, and the light-blocking wall 9 prevents the light propagating in the sub-optical channel 10 from propagating to other sub-optical channels.
[0066] Embodiment 10
[0067] like Fig.10 As shown, a microlens array lens module with an aperture comprises a field lens array 1, a pattern array 2, a projection lens array 3, and a substrate 5. The field lens array 1, the pattern array 2, and the projection lens array 3 are arranged in sequence along the light propagation direction. The substrate 5 is arranged between the pattern array 2 and the projection lens array 3. Each sub-field lens in the field lens array 1, each sub-pattern in the pattern array 2, and each sub-projection lens in the projection lens array 3 correspond to each other. The corresponding sub-field lenses, sub-patterns, and sub-projection lenses together constitute a sub-optical channel. The module also comprises an aperture array 4. The aperture array 4 is arranged on the light incident surface of the projection lens array 3. Each sub-aperture of the aperture array 4 corresponds to a sub-optical channel. The sub-aperture only allows light from its corresponding sub-optical projection channel to pass through, and prevents light from other sub-optical projection channels from passing through.
[0068] It also includes a light blocking wall 9, which is arranged at the periphery of each sub-optical channel 10 and is located between the field lens array 1 and the projection lens array 3. The length of the light blocking wall 9 is less than the distance between the light exit surface of the field lens array 1 and the light entrance surface of the projection lens array 3. Fig.12 As shown, the sub-optical channel 10 is partially surrounded by the light-blocking wall 9, and the light-blocking wall 9 prevents the light propagating in the sub-optical channel 10 from propagating to other sub-optical channels.
[0069] Embodiment 11
[0070] like Fig.13 As shown, a projection device includes a light source 11, a screen 12, and the microlens array lens module of the above-mentioned embodiment 1 arranged between the light source 11 and the screen 12.
[0071] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.
Claims
1. A microlens array lens module with an aperture, comprising a field lens array, a pattern array, a projection lens array, and a substrate, wherein the field lens array, the pattern array, and the projection lens array are arranged in sequence along the light propagation direction, the substrate is arranged between the pattern array and the projection lens array, each sub-field lens in the field lens array, each sub-pattern in the pattern array, and each sub-projection lens in the projection lens array correspond to each other, and the corresponding sub-field lenses, sub-patterns, and sub-projection lenses together constitute a sub-optical channel, characterized in that: It also includes an aperture array, which is arranged on the light entrance surface or the light exit surface of the projection mirror array. Each sub-aperture of the aperture array corresponds to a sub-optical channel. The sub-aperture only allows light from its corresponding sub-optical projection channel to pass through, and blocks light from other sub-optical projection channels from passing through.
2. The microlens array lens module with an aperture according to claim 1, characterized in that: A first spacing substrate is arranged between the field lens array and the pattern array, and a second spacing substrate is arranged between the substrate and the projection lens array.
3. A microlens array lens module with an aperture according to claim 1 or 2, characterized in that: It also includes a prism array, which is arranged on a side of the projection lens array away from the light source, and each sub-prism of the prism array corresponds to a sub-optical channel.
4. The microlens array lens module with an aperture according to claim 3, characterized in that: The prism array is one layer or multiple layers, and the multiple layers of prism array are arranged in sequence along the light propagation direction.
5. The microlens array lens module with an aperture according to claim 1, characterized in that: It also includes a light-blocking wall, which is arranged at the periphery of each sub-optical channel to fully or partially surround the sub-optical channel, and the light propagating in the sub-optical channel is prevented from propagating to other sub-optical channels through the light-blocking wall.
6. The microlens array lens module with an aperture according to claim 5, characterized in that: The light blocking wall is located between the field lens array and the projection lens array.
7. The microlens array lens module with an aperture according to claim 6, characterized in that: The length of the light-blocking wall is less than or equal to the distance between the light-emitting surface of the field lens array and the light-entering surface of the projection lens array.
8. A projection device, characterized in that: The invention comprises a light source, a screen and a microlens array lens module as claimed in any one of claims 1 to 7 arranged between the light source and the screen.