High-precision MTF detector for M20 lens processing
Through the innovative design of the lifting and fixing components, the shortcomings of existing MTF testers in lens height and size adaptability are solved, and high-precision lens detection is achieved.
Patent Information
- Application Number
- CN202422019381.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2034-08-20
AI Technical Summary
Existing MTF testers are difficult to adjust the height of lenses of different models and to fix lenses of different sizes, resulting in insufficient detection accuracy and applicability.
The design of lifting components and fixing components is adopted. The lens height can be adjusted and fixed through the cooperation of rotating disk and threaded rod, ensuring the coaxial alignment of the lens with the generator and analyzer. The soft clamping block can also be used to prevent the lens from being damaged.
The detection accuracy and applicability of the MTF tester have been improved, and it can adapt to lenses of different models and sizes, ensuring the accuracy and stability of the test results.
Smart Images
Figure CN223332592U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of optical detection equipment, in particular to a high-precision MTF detector for processing M20 lenses. Background Art
[0002] An MTF meter is a device used to measure the performance of optical systems. The optical transfer function describes an optical system's ability to transmit various spatial frequency components. It reflects the system's ability to retain image detail and resolve image details. By measuring the MTF of an optical system, key performance indicators such as contrast, resolution, and sharpness can be evaluated. The high-precision MTF meter used in M20 lens processing is a device specifically designed to measure the optical performance of M20 lenses. This instrument can accurately measure the MTF curve of an M20 lens at different spatial frequencies to evaluate its imaging quality.
[0003] Currently, the existing MTF testers on the market have the following disadvantages:
[0004] (1) Different models of lenses have different center positions. When testing the various parameters of the lens, the generator, lens, and analyzer need to be located on the same axis. The existing MTF tester is not convenient for adjusting the height of the lens to control the imaging effect, which reduces the accuracy of the test.
[0005] (2) Different models of lenses have different sizes. The existing MTF tester is not convenient for fixing lenses of different sizes, which reduces the applicability of the MTF tester. Utility Model Content
[0006] In order to solve the above technical problems, the utility model provides a high-precision MTF tester for M lens processing.
[0007] The utility model adopts the following technical solution: a high-precision MTF detector for M lens processing, comprising an optical table, a generator fixedly connected to the edge of the top of the optical table, a guide rail fixedly connected to the side of the top of the optical table close to the generator, a bracket slidably connected to the surface of the guide rail, a lifting assembly slidably connected to the bottom of the bracket, a fixing ring fixedly connected to the top of the lifting assembly, fixing assemblies penetratingly connected to both sides of the fixing ring, and an analyzer slidably connected to both sides of the guide rail.
[0008] As a further improvement of the above solution, the lifting assembly includes a rotating disk rotatably connected to the bottom of the bracket, a threaded hole is opened in the middle of the top of the rotating disk, the internal thread of the threaded hole is connected to the A threaded rod, and the top of the A threaded rod is fixedly connected to a fixing ring.
[0009] Through the above technical solution and the setting of the rotating disk, the purpose of facilitating the inspection personnel to control the up and down movement of the A threaded rod is achieved.
[0010] As a further improvement of the above solution, the fixing assembly includes a threaded barrel connected to both sides of the fixing ring, the internal thread of the threaded barrel is connected to a B threaded rod, and one end of the B threaded rod is fixedly connected to a soft clamping block.
[0011] Through the above technical solution and the provision of the soft clamping block, the purpose of avoiding damage to the lens under test during the clamping process is achieved.
[0012] As a further improvement of the above solution, the bottom of the bracket is rotatably connected to a rotating wheel, the bottom of the analyzer is rotatably connected to a rotating wheel, and a guide rail is overlapped on one side of the rotating wheel.
[0013] Through the above technical solution, the setting of several rotating wheels in the picture makes the movement of the bracket and the analyzer on the guide rail more stable.
[0014] As a further improvement of the above solution, a baffle is fixedly connected to the edge of the top of the bracket, and a fixing ring is overlapped on one side of the baffle.
[0015] Through the above technical solution and the provision of the baffle, the purpose of limiting the rotation of the fixing ring is achieved.
[0016] As a further improvement of the above solution, the bottom of the A threaded rod is fixedly connected to a limiting block A, and the other end of the B threaded rod is fixedly connected to a limiting block B.
[0017] Through the above technical solution, by setting the A limiting block and the B limiting block, the purpose of preventing the A threaded rod and the B threaded rod from falling out during the rotation process is achieved.
[0018] Compared with the prior art, the beneficial effects of the present invention are:
[0019] The utility model is provided with a lifting assembly. When a tester uses the MTF tester to test a lens, the tester fixes the lens through the fixing assembly and rotates the rotating disk. Since the top of the A-threaded rod is fixedly connected to the fixing ring and the fixing ring is restricted by the baffle and cannot rotate, the rotating disk drives the A-threaded rod to move up and down through the threaded hole when the rotating disk rotates, thereby changing the overall height of the fixing ring at the top of the A-threaded rod, the fixing assembly and the lens to be tested, so that the MTF tester can adjust the height of the lens to control the imaging effect, thereby improving the accuracy of the test.
[0020] The utility model provides a fixing assembly. When using the MTF tester, the tester places the lens to be tested between the two soft clamping blocks. Then, the tester can control the depth of the B threaded rod into the threaded barrel by rotating the B threaded rod, thereby controlling the position of the soft clamping blocks to clamp the lens to be tested inside the fixing ring. Therefore, the MTF tester can fix lenses of different sizes, thereby improving the applicability of the MTF tester. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 This is a schematic diagram of the overall structure of the utility model;
[0022] Figure 2 This is a schematic diagram of the split structure of the utility model;
[0023] Figure 3 This is a schematic diagram of the structure of the lifting component of the utility model;
[0024] Figure 4 This is a schematic diagram of the structure of the fixing component of the utility model.
[0025] Description of main symbols:
[0026] 1. Optical table; 2. Generator; 3. Guide rail; 4. Bracket; 5. Lifting assembly; 501. Rotating disk; 502. Threaded hole; 503. Threaded rod A; 6. Fixing ring; 7. Fixing assembly; 701. Threaded barrel; 702. Threaded rod B; 703. Soft clamping block; 8. Analyzer; 9. Rotating wheel; 10. Baffle; 11. Limit block A; 12. Limit block B. DETAILED DESCRIPTION
[0027] Below, the present invention is further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.
[0028] Example:
[0029] Please combine Figure 1-4The present embodiment is a high-precision MTF tester for M20 lens processing, comprising an optical table 1, a generator 2 fixedly connected to the edge of the top of the optical table 1, a guide rail 3 fixedly connected to the side of the top of the optical table 1 near the generator 2, a bracket 4 slidably connected to the surface of the guide rail 3, and a lifting assembly 5 slidably connected to the bottom of the bracket 4. By setting the lifting assembly 5, when the tester uses the MTF tester to test the lens, after fixing the lens with the fixing assembly 7, the rotating disk 501 is rotated. Since the top of the A threaded rod 503 is fixedly connected to the fixing ring 6, and the fixing ring 6 is restricted by the baffle 10 and cannot rotate, the rotating disk 501 drives the A threaded rod 503 to move up and down through the threaded hole 502 when the rotating disk 501 rotates, thereby changing the fixed position of the top of the A threaded rod 503. The ring 6, the fixing assembly 7 and the overall height of the lens to be tested enable the MTF tester to adjust the height of the lens to control the imaging effect, thereby improving the accuracy of the test. The top of the lifting assembly 5 is fixedly connected to the fixing ring 6, and the two sides of the fixing ring 6 are connected through the fixing assembly 7. By setting the fixing assembly 7, when using the MTF tester, the tester places the lens to be tested between the two soft clamping blocks 703. Then, the tester can control the length of the B threaded rod 702 penetrating into the threaded barrel 701 by rotating the B threaded rod 702, thereby controlling the position of the soft clamping block 703 to clamp the lens to be tested inside the fixing ring 6, so that the MTF tester can fix lenses of different sizes, thereby improving the applicability of the MTF tester. The analyzer 8 is slidably connected to both sides of the guide rail 3.
[0030] The lifting assembly 5 includes a rotating disk 501 rotatably connected to the bottom of the bracket 4. A threaded hole 502 is provided in the middle of the top of the rotating disk 501. The internal thread of the threaded hole 502 is connected to the A threaded rod 503. The top of the A threaded rod 503 is fixedly connected to the fixing ring 6. Through the setting of the rotating disk 501, the purpose of facilitating the inspection personnel to control the up and down movement of the A threaded rod 503 is achieved.
[0031] The fixing assembly 7 includes a threaded barrel 701 connected to both sides of the fixing ring 6. The internal thread of the threaded barrel 701 is connected to a B threaded rod 702. One end of the B threaded rod 702 is fixedly connected to a soft clamping block 703. The provision of the soft clamping block 703 can avoid damage to the lens under test during the clamping process.
[0032] The bottom of the bracket 4 is rotatably connected to a rotating wheel 9, and the bottom of the analyzer 8 is rotatably connected to a rotating wheel 9. One side of the rotating wheel 9 is overlapped with a guide rail 3. The arrangement of several rotating wheels 9 in the picture makes the movement of the bracket 4 and the analyzer 8 on the guide rail 3 more stable.
[0033] A baffle 10 is fixedly connected to the edge of the top of the bracket 4, and a fixing ring 6 is overlapped on one side of the baffle 10. Through the provision of the baffle 10, the purpose of limiting the rotation of the fixing ring 6 is achieved.
[0034] The bottom of the A threaded rod 503 is fixedly connected to the A limit block 11, and the other end of the B threaded rod 702 is fixedly connected to the B limit block 12. Through the setting of the A limit block 11 and the B limit block 12, the purpose of preventing the A threaded rod 503 and the B threaded rod 702 from falling out during rotation is achieved.
[0035] The operating principle of a high-precision MTF tester for M20 lens processing in the embodiment of the present application is as follows: When using the MTF tester, a tester places the lens to be tested between two soft clamps 703. The tester can then control the depth of the B-threaded rod 702 into the threaded barrel 701 by rotating the B-threaded rod 702, thereby controlling the position of the soft clamps 703 to clamp the tested lens inside the fixed ring 6. When using the MTF tester to test the lens, the tester rotates the rotating disk 501. Because the top of the A-threaded rod 503 is fixedly connected to the fixed ring 6, and the fixed ring 6 is restricted by the baffle 10 and cannot rotate, the rotating disk 501 rotates, driving the A-threaded rod 503 up and down through the threaded hole 502, thereby changing the overall height of the fixed ring 6, the fixed assembly 7, and the tested lens at the top of the A-threaded rod 503, so that the generator 2, the lens, and the analyzer 8 are located on the same axis. The light signal emitted by the generator 1 passes through the lens and forms an image on the analyzer 8. The analyzer 8 analyzes the image, and the various parameters obtained after processing by an external processor can be displayed on an external display device.
[0036] The above embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.
Claims
1. A high-precision MTF detector for M20 lens processing, comprising an optical table (1), characterized in that: The edge of the top of the optical table (1) is fixedly connected to a generator (2), the top of the optical table (1) is fixedly connected to a guide rail (3) on a side close to the generator (2), the surface of the guide rail (3) is slidably connected to a bracket (4), the bottom of the bracket (4) is slidably connected to a lifting component (5), the top of the lifting component (5) is fixedly connected to a fixing ring (6), both sides of the fixing ring (6) are connected through fixing components (7), and both sides of the guide rail (3) are slidably connected to analyzers (8).
2. The high-precision MTF tester for M20 lens processing according to claim 1, characterized in that: The lifting assembly (5) comprises a rotating disk (501) rotatably connected to the bottom of the bracket (4); a threaded hole (502) is provided in the middle of the top of the rotating disk (501); an A threaded rod (503) is connected to the inner thread of the threaded hole (502); and a fixing ring (6) is fixedly connected to the top of the A threaded rod (503).
3. The high-precision MTF tester for M20 lens processing according to claim 2, characterized in that: The fixing assembly (7) comprises a threaded barrel (701) connected to both sides of the fixing ring (6); the internal thread of the threaded barrel (701) is connected to a B threaded rod (702); one end of the B threaded rod (702) is fixedly connected to a soft clamping block (703).
4. The high-precision MTF tester for M20 lens processing according to claim 1, characterized in that: The bottom of the bracket (4) is rotatably connected to a rotating wheel (9), the bottom of the analyzer (8) is rotatably connected to a rotating wheel (9), and one side of the rotating wheel (9) is overlapped with a guide rail (3).
5. The high-precision MTF tester for M20 lens processing according to claim 1, characterized in that: A baffle (10) is fixedly connected to the edge of the top of the bracket (4), and a fixing ring (6) is overlapped on one side of the baffle (10).
6. The high-precision MTF tester for M20 lens processing according to claim 3, characterized in that: The bottom of the A threaded rod (503) is fixedly connected to an A limiting block (11), and the other end of the B threaded rod (702) is fixedly connected to a B limiting block (12).