Lens focal length testing device
By embedding the lens in the tool fixture, combined with the design of the optocoupler and reflector, the problem of inaccurate testing caused by small lens cannot be positioned is solved, and a more efficient and accurate lens focal length test is achieved.
Patent Information
- Application Number
- CN202420855498.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-23
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-04-23
AI Technical Summary
In the prior art, the lens is small and cannot be positioned, resulting in inaccurate focal length testing.
Design a lens focal length test device, by embedding the lens in the tool fixture and forming an integrated structure with the tool fixture, increasing the overall area of the lens, using the photocoupler, reflector and light source components, through the photocoupler and The cooperation of the reflector enables accurate positioning and testing of the lens.
Improve the accuracy and efficiency of the lens focal length test, avoid the steps that the lens needs to move during the test, and enhance the stability and accuracy of the test.
Smart Images
Figure CN222318401U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of endoscopes, in particular to a lens focal length testing device. Background Art
[0002] With the rapid development of endoscope technology, the demand for wafer-level stacked optical lenses in the field of micro-nano precision manufacturing is increasing. Wafer-level stacked lenses are widely used in mobile phones, tablet computers, and medical endoscope modules due to their tiny structure, high precision, and excellent optical performance. As an important component of the optical system, the performance and quality of the lens have a crucial impact on the performance of the overall system. As one of the basic parameters of the lens, the accuracy of the focal length directly affects the imaging quality and system performance. Therefore, it is very important to accurately test the focal length of the lens. However, in the actual production process, it is a technical challenge to accurately test the focal length of the stacked optical lens. In order to ensure the quality of the wafer-level stacked lens, its focal length test becomes an indispensable part of the production process. To this end, the utility model proposes a design scheme for a wafer-level stacked lens focal length testing device. Utility Model Content
[0003] In order to overcome the defects of the prior art, the utility model aims to provide a lens focal length testing device to solve the technical problem in the prior art that the lens is small and cannot be positioned, resulting in inaccurate testing.
[0004] The utility model is realized by the following technical solutions:
[0005] A lens focal length testing device comprises a photoelectric coupler, a jig, a reflector and a light source assembly; the jig has a lens embedded in it, the photoelectric coupler is located directly above the jig, the collimating lens of the photoelectric coupler is aimed at the lens, the reflector is located directly below the jig, and the reflected light of the reflector is aimed at the lens, the light source assembly is arranged on one side of the reflector, and the emitting end of the light source assembly is aimed at the reflector.
[0006] Preferably, it also includes a base and a column, the column is vertically arranged on the top of the base, the photoelectric coupler is assembled on the column, the tooling fixture is placed on the top of the base, the reflector is arranged inside the base, the light source assembly is located outside the base, a first through hole is provided on the top of the base, and a second through hole is provided on the side of the base facing the light source assembly, and the first through hole and the second through hole are used for the light source to pass through.
[0007] Furthermore, the jig is located on the first through hole at the top of the base, the aperture of the first through hole is smaller than the bottom surface of the jig, and the aperture of the first through hole is larger than the diameter of the lens.
[0008] Furthermore, it also includes a clamping piece, which is arranged on the base, and the clamping end of the clamping piece clamps two sides of the tooling fixture.
[0009] Preferably, the bottom of the tooling fixture is provided with a groove surface, and the groove surface is provided with an opening, and the lens is embedded in the opening.
[0010] Furthermore, the bottom surface of the side wall of the tooling fixture is arranged in a plane.
[0011] Furthermore, the bottom surfaces of the side walls of the groove are highly flush.
[0012] Furthermore, a first chamfer is formed on a side of the opening close to the photoelectric coupler on a corresponding side of the jig; and a second chamfer is formed on a side of the opening close to the reflector on a corresponding side of the jig.
[0013] Furthermore, the first chamfer is arranged to expand outwards, and the second chamfer is arranged to contract inwards.
[0014] Preferably, the reflection angle of the reflector is 45°.
[0015] Compared with the prior art, the present invention has the following beneficial technical effects:
[0016] The utility model provides a lens focal length testing device, which embeds the lens in a tooling fixture and forms an integrated structure with the tooling fixture, thereby increasing the overall area of the large lens. When adjusting the lens, only the tooling fixture needs to be adjusted, and the lens does not need to be moved, which facilitates the positioning of the lens and improves the accuracy of the test in the lens focal length test.
[0017] Furthermore, a column is vertically arranged on the top of the base, a photoelectric coupler is assembled on the column, a tooling fixture is placed on the top of the base, a reflector is arranged inside the base, the light source assembly is located outside the base, a first through hole is arranged on the top of the base, a second through hole is arranged on the side of the base facing the light source assembly, the first through hole and the second through hole are used for the light source to pass through, the base and the column provide stable assembly for testing, the photoelectric coupler is assembled on the column, and the tooling fixture is placed on the top of the base, wherein there is a distance between the photoelectric coupler and the tooling fixture, thereby improving the testing efficiency of the lens, and a first through hole and a second through hole are arranged on the base, so that the light source emitted by the light source assembly can be reflected into the lens through the reflector and then into the photoelectric coupler.
[0018] Furthermore, the jig is located on the first through hole at the top of the base, the aperture of the first through hole is smaller than the bottom size of the jig, and the aperture of the first through hole is larger than the diameter of the lens, so that the reflector reflects the light source into the lens.
[0019] Furthermore, the clamping member is arranged on the base, and the clamping ends of the clamping member clamp the two sides of the tooling fixture, so that the tooling fixture can be stably placed on the base, thereby improving the stability of the test.
[0020] Furthermore, a groove surface is provided at the bottom of the tooling fixture, and an opening is provided on the groove surface, and the lens is embedded in the opening to facilitate the placement of the lens.
[0021] Furthermore, the bottom surface of the side wall of the tooling fixture is arranged in a plane, and the bottom surface of the side wall of the groove is highly flush, so as to avoid the tooling fixture from tilting, causing the emission direction of the light source to shift and affecting the test accuracy.
[0022] Furthermore, a first chamfer is formed on the corresponding side of the jig on the side of the opening close to the photoelectric coupler; a second chamfer is formed on the corresponding side of the jig on the side of the opening close to the reflector, wherein the first chamfer is expanded outward to facilitate the placement of the lens into the opening, and the second chamfer is contracted inward to prevent the lens from falling out of the opening. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 This is a schematic diagram of the structure of the focal length testing device of the utility model;
[0024] Figure 2 This is a schematic diagram of the lens assembly tooling fixture in the utility model;
[0025] Figure 3 This is a schematic diagram of the tooling fixture in the utility model;
[0026] In the figure: 1-photoelectric coupler; 2-collimating lens; 3-lens; 4-tooling fixture body; 5-reflector; 6-light source assembly; 7-column; 8-base; 9-clamping piece; 10-first through hole; 11-second through hole; 41-opening; 42-first chamfer; 43-second chamfer. DETAILED DESCRIPTION
[0027] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment 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.
[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model 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 data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.
[0029] The utility model is further described in detail below with reference to the accompanying drawings:
[0030] The utility model aims to provide a lens focal length testing device to solve the technical problem in the prior art that the lens is small and cannot be positioned, resulting in inaccurate testing.
[0031] See also Figure 1 In one embodiment of the utility model, a lens focal length testing device is provided, including a photoelectric coupler 1, a jig 4, a reflector 5 and a light source assembly 6; the jig 4 is embedded with a lens 3, the photoelectric coupler 1 is located directly above the jig 4, the lens of the photoelectric coupler 1 is aligned with the lens 3, the reflector 5 is located directly below the jig 4, and the reflected light of the reflector 5 is aligned with the lens 3, the light source assembly 6 is arranged on one side of the reflector 5, and the emitting end of the light source assembly 6 is aligned with the reflector 5.
[0032] Specifically, the lens focal length testing device also includes a base 8 and a column 7, the column 7 is vertically arranged on the top of the base 8, the photoelectric coupler 1 is assembled on the column 7, the tooling fixture 4 is placed on the top of the base 8, the reflector 5 is arranged in the base 8, the light source assembly 6 is located outside the base 8, a first through hole 10 is provided on the top of the base 8, and a second through hole 11 is provided on the side of the base 8 facing the light source assembly 6, and the first through hole 10 and the second through hole 11 are used for the light source to pass through.
[0033] Among them, the base and the column provide stable assembly for the test, the photoelectric coupler is assembled on the column, and the tooling fixture is placed on the top of the base, wherein there is a distance between the photoelectric coupler and the tooling fixture, which improves the test efficiency of the lens. The first through hole and the second through hole are arranged on the base to facilitate the light source emitted by the light source assembly to be reflected into the lens through the reflector and then into the photoelectric coupler.
[0034] Among them, the tooling fixture 4 is located on the first through hole 10 at the top of the base 8. The aperture of the first through hole 10 is smaller than the bottom size of the tooling fixture 4, and the aperture of the first through hole 10 is larger than the diameter of the lens 3, which is convenient for the reflector to reflect the light source into the lens.
[0035] Among them, the lens focal length testing device also includes a clamping member 9, which is arranged on the base 8. The clamping ends of the clamping member 9 clamp the two sides of the tooling fixture 4, so that the tooling fixture can be stably placed on the base, thereby improving the stability of the test.
[0036] Specifically, the bottom of the tooling fixture 4 is provided with a groove surface, and the groove surface is provided with an opening 41, and the lens 3 is embedded in the opening 41. Figure 2 shown.
[0037] The bottom surface of the side wall of the fixture 4 is flat, and the bottom surface of the side wall of the groove is highly flush, so as to avoid the fixture from tilting, causing the emission direction of the light source to shift and affecting the test accuracy.
[0038] Specifically, a first chamfer 42 is formed on the corresponding side of the jig 4 at a side of the opening 41 close to the photoelectric coupler 1 ; a second chamfer 43 is formed on the corresponding side of the jig 4 at a side of the opening 41 close to the reflector 5 .
[0039] The first chamfer 42 is set to expand outward, and the second chamfer 43 is set to shrink inward. Figure 3 shown.
[0040] The lens of the utility model can be a wafer-level stacked lens.
[0041] The lens focal length testing device provided by the utility model, when in use:
[0042] First, use tweezers to pick up the lens 3 and put it into the jig 4, and then put the jig 4 into the clamp 9 in the base 8 to ensure that the lens 3 is flat. Next, turn on the light source assembly 6, which emits light through the collimator and incidents on the reflector 5. The reflector 5 incidents the light at 45° on the surface of the lens 3. The light passes through the stacked optical lens and enters the photoelectric coupler 1 above, and is projected onto the software light screen. Finally, the measurement system analyzes the image through the magnification method to accurately measure the focal length of the stacked optical lens.
[0043] In summary, the utility model provides a lens focal length testing device, which embeds the lens in a jig and forms an integrated structure with the jig to increase the overall area of the large lens. When adjusting the lens, only the jig needs to be adjusted without moving the lens, which facilitates the positioning of the lens and improves the accuracy of the test in the lens focal length test.
[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or replaced by equivalents, and any modification or equivalent replacement that does not depart from the spirit and scope of the utility model should be included in the scope of protection of the claims of the utility model.
Claims
1. A lens focal length testing device, characterized in that: The invention comprises a photoelectric coupler (1), a jig (4), a reflector (5) and a light source assembly (6); the jig (4) is embedded with a lens (3); the photoelectric coupler (1) is located directly above the jig (4); a collimating lens (2) of the photoelectric coupler (1) is aligned with the lens (3); the reflector (5) is located directly below the jig (4); and reflected light from the reflector (5) is aligned with the lens (3); the light source assembly (6) is arranged on one side of the reflector (5); and an emitting end of the light source assembly (6) is aligned with the reflector (5).
2. A lens focal length testing device according to claim 1, characterized in that: The invention also comprises a base (8) and a column (7), wherein the column (7) is vertically arranged on the top of the base (8), the photoelectric coupler (1) is mounted on the column (7), the tooling fixture (4) is placed on the top of the base (8), the reflector (5) is arranged inside the base (8), the light source assembly (6) is located outside the base (8), a first through hole (10) is arranged on the top of the base (8), and a second through hole (11) is arranged on a side of the base (8) facing the light source assembly (6), the first through hole (10) and the second through hole (11) are used for the light source to pass through.
3. A lens focal length testing device according to claim 2, characterized in that: The tooling fixture (4) is located on the first through hole (10) at the top of the base (8); the aperture of the first through hole (10) is smaller than the bottom surface of the tooling fixture (4), and the aperture of the first through hole (10) is larger than the diameter of the lens (3).
4. A lens focal length testing device according to claim 2, characterized in that: It also includes a clamping member (9), wherein the clamping member (9) is arranged on the base (8), and the clamping end of the clamping member (9) clamps two sides of the tooling fixture (4).
5. The lens focal length testing device according to claim 1, characterized in that: The bottom of the tooling fixture (4) is provided with a groove surface, and the groove surface is provided with an opening (41), and the lens (3) is embedded in the opening (41).
6. A lens focal length testing device according to claim 5, characterized in that: The bottom surface of the side wall of the tooling fixture (4) is arranged in a plane.
7. A lens focal length testing device according to claim 6, characterized in that: The bottom surfaces of the side walls of the groove are flush with each other.
8. The lens focal length testing device according to claim 5, characterized in that: A side of the opening (41) close to the photoelectric coupler (1) forms a first chamfer (42) on a corresponding side of the tooling fixture (4); a side of the opening (41) close to the reflector (5) forms a second chamfer (43) on a corresponding side of the tooling fixture (4).
9. The lens focal length testing device according to claim 8, characterized in that: The first chamfer (42) is arranged to expand outwards, and the second chamfer (43) is arranged to contract inwards.
10. The lens focal length testing device according to claim 1, characterized in that: The reflection angle of the reflector is 45°.