Lens focal length detection tool

Abstract

The utility model relates to the technical field of optical measurement, in particular to a lens focal length detection tool which comprises a tool base, a light source module is fixed to the top end of the tool base through a bolt, a light-transmitting plate is fixedly connected to the right side of the light source module and located at the top end of the tool base, and a clamping mechanism is installed between the light source module and the light-transmitting plate. The light-transmitting plate is slidably connected to the top end of the tool base, and the right side of the light-transmitting plate is slidably connected with a moving mechanism. According to the utility model, through mutual cooperation of internal parts of the clamping mechanism, lenses with different diameters can be clamped and fixed, and the arc-shaped top plate slides in the clamping plate according to the sliding distance of the clamping plate and lifts the lens to be measured, so that after the lenses with different diameters to be measured are clamped and fixed on the clamping plate, the lenses with different diameters can be clamped and fixed on the arc-shaped top plate. The circle center of the sliding seat, the light source module and the light-transmitting plate are located at the same horizontal height, and the sliding seat can slide on the connecting seat for position adjustment through mutual matching of internal parts of the moving mechanism.

Description

Technical Field

[0001] This utility model relates to the field of optical measurement technology, specifically to a lens focal length detection fixture. Background Technology

[0002] The focal length of a lens is a measure of the focusing or diverging of light in an optical system. It refers to the distance from the optical center of the lens to the focal point where the light converges when parallel light is incident. Optical systems with short focal lengths have a better ability to focus light than optical systems with long focal lengths. Simply put, the focal length is the distance between the focal point and the center point of the mirror.

[0003] A search revealed a utility model patent with publication number CN 221260351 U, which discloses a lens focal length measuring fixture. The fixture includes a fixed support, a light-emitting element, a mounting base, and a lens fixing plate. A convex lens is mounted on the mounting base. The fixed support has a sliding seat via a screw-type structure, and an imaging plate is fixed on the sliding seat. The light source emitted by the light-emitting element passes sequentially through the convex lens and the lens to be measured mounted on the lens fixing plate before focusing onto the imaging plate. A rocker arm is located at the end of the screw in the screw-type structure; rotating the rocker arm controls the imaging plate to move closer to or away from the lens fixing plate. This fixture features a compact structure, small measurement error, and convenient focal length measurement.

[0004] Although the aforementioned patent uses a rocker arm to control the imaging plate to move closer to or further away from the lens fixing plate, making the entire fixture compact, with small measurement error and convenient focal length measurement, existing fixtures can clamp and fix the lens under test and adjust the distance between the lens under test and the fixture. However, each fixture can only use lenses of the same size. When the diameter of the lens under test is different, the position and height of the clamping parts need to be adjusted by bolts to make the lens under test, the light source, and the light-transmitting plate at the same level. However, the bolt fixing adjustment method results in a large adjustment error between the lens under test, the light source, and the light-transmitting plate, and the operation steps are relatively cumbersome.

[0005] Therefore, it is necessary to propose a lens focal length detection fixture to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a lens focal length testing fixture. Through the cooperation of the internal parts of the clamping mechanism, lenses of different diameters can be clamped and fixed. The arc-shaped top plate slides inside the clamping plate according to the sliding distance of the clamping plate, and lifts the lens to be tested. After the lens of different diameters is clamped and fixed on the clamping plate, its center is at the same horizontal height as the light source module and the light-transmitting plate. This solves the problem in the prior art that when the diameter of the lens to be tested is different, the position and height of the clamping parts need to be adjusted by bolts to make the lens to be tested, the light source, and the light-transmitting plate at the same horizontal height. However, the bolt fixing adjustment method results in a large adjustment error between the lens to be tested, the light source, and the light-transmitting plate, and the operation steps are relatively cumbersome.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a lens focal length detection fixture, including a fixture base, a light source module is bolted to the top of the fixture base, a light-transmitting plate is fixedly connected to the right side of the light source module and located at the top of the fixture base, a clamping mechanism is installed between the light source module and the light-transmitting plate and is slidably connected to the top of the fixture base, and a moving mechanism is slidably connected to the right side of the light-transmitting plate.

[0008] The clamping mechanism includes a connecting seat, which is mechanically connected to the top of the tooling base and located between the light source module and the light-transmitting plate. A sliding seat is slidably sleeved on the outer wall of the connecting seat. A clamping plate is slidably connected to the top of the sliding seat, and a telescopic spring is connected between the clamping plate and the inner wall of the sliding seat. An arc-shaped top plate is slidably connected to the inner wall of the clamping plate. A connecting column is mechanically connected to the bottom end of the arc-shaped top plate and extends through to the bottom end of the clamping plate. A conical fixing block is mechanically machined on the inner wall of the sliding seat and fits against the bottom end of the connecting column.

[0009] The moving mechanism includes a conical block, which is slidably connected to both ends of the inner wall of the sliding seat and extends through the sliding seat to the outer wall of the connecting seat. A connecting spring is mechanically connected between the conical block and the sliding seat.

[0010] Preferably, the moving mechanism includes an imaging plate, which is slidably connected to the top of the fixture base and located to the right of the light-transmitting plate. The bottom end of the imaging plate is mechanically connected to a sliding block, which is slidably connected to the interior of the fixture base. A handle is rotatably connected to the right side of the fixture base, and a threaded rod is mechanically connected to the right side of the handle, extending into the interior of the fixture base. The sliding block and the outer wall of the threaded rod are threaded and slidably engaged.

[0011] Preferably, the inner wall of the sliding seat is provided with a connecting groove that matches the connecting seat, and the clamping plates are provided with a clamping groove that matches the lens to be tested, and flexible rubber rings are connected to both sides of the inner wall of the clamping groove.

[0012] Preferably, the contact surfaces of the top end of the conical fixing block and the bottom end of the connecting column are both conical surfaces, the top end of the sliding seat is provided with a moving groove that matches the clamping plate, and the inner wall of the clamping plate is provided with a telescopic groove that matches the arc-shaped top plate.

[0013] Preferably, the outer wall of the connecting seat is provided with a conical groove that matches the conical block, and the conical grooves are arranged at a certain interval. The interior of the sliding seat is provided with a telescopic groove that matches the connecting spring.

[0014] Preferably, the top of the tooling base is provided with a sliding groove that matches the imaging plate and the sliding block, and the sliding block is provided with an internal thread that matches the thread on the outer wall of the threaded rod. The top of the tooling base is machined with a scale corresponding to the moving distance of the imaging plate.

[0015] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0016] 1. By rotating the handle, the rotation of the handle drives the threaded rod to rotate, and the rotation of the threaded rod drives the sliding block to slide inside the fixture base. The sliding block causes the imaging plate at the top to slide on the top of the fixture base, thus adjusting the distance between the imaging plate and the light-transmitting plate. By pushing the sliding seat, the conical block on the inner wall of the sliding seat contacts the conical groove on the outer wall of the connecting seat, and pushes the conical block to compress the connecting spring to retract and move, thus allowing the sliding seat to slide on the connecting seat, adjusting the distance between the lens under test and the light source module.

[0017] 2. By pushing the clamping plates to compress the telescopic springs and move them apart, the clamping plates move away from each other, making it easier for the operator to place the lens to be tested between the clamping plates. After releasing the push on the clamping plates, the telescopic springs return to their original position and push the clamping plates to move, thus clamping and fixing the lens to be tested. At the same time, the movement of the clamping plates causes the connecting column to move and contact the conical fixing block. The conical fixing block pushes the connecting column to move through its conical surface. The movement of the connecting column causes the arc-shaped top plate to move on the inner wall of the clamping plate, changing the diameter of the clamping groove on the inner wall of the clamping plate. This allows the clamping plate to clamp and fix lenses of different diameters. The arc-shaped top plate also supports the lens to be tested, ensuring that after the lens of different diameters is clamped and fixed on the clamping plate, its center is at the same horizontal height as the light source module and the light-transmitting plate. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a cross-sectional structural diagram of the tooling base of this utility model;

[0021] Figure 3 This is a cross-sectional structural diagram of the sliding seat of this utility model;

[0022] Figure 4 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Tooling base; 101. Light source module; 102. Light-transmitting plate; 2. Clamping mechanism; 201. Connecting seat; 202. Sliding seat; 203. Clamping plate; 204. Telescopic spring; 205. Arc-shaped top plate; 206. Connecting column; 207. Conical fixing block; 3. Moving mechanism; 301. Imaging plate; 302. Sliding block; 303. Handle; 304. Threaded rod; 305. Conical block; 306. Connecting spring. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0026] This utility model provides, for example Figure 1-4 The lens focal length detection fixture shown includes a fixture base 1, a light source module 101 is bolted to the top of the fixture base 1, a light-transmitting plate 102 is fixedly connected to the right side of the light source module 101 and is located at the top of the fixture base 1, a clamping mechanism 2 is installed between the light source module 101 and the light-transmitting plate 102 and is slidably connected to the top of the fixture base 1, and a moving mechanism 3 is slidably connected to the right side of the light-transmitting plate 102.

[0027] The clamping mechanism 2 includes a connecting seat 201, which is mechanically connected to the top of the tooling base 1 and located between the light source module 101 and the light-transmitting plate 102. A sliding seat 202 is slidably sleeved on the outer wall of the connecting seat 201. A clamping plate 203 is slidably connected to the top of the sliding seat 202. A telescopic spring 204 is connected between the clamping plate 203 and the inner wall of the sliding seat 202. An arc-shaped top plate 205 is slidably connected to the inner wall of the clamping plate 203. A connecting post 206 is mechanically connected to the bottom end of the arc-shaped top plate 205 and extends through to the bottom end of the clamping plate 203. A conical fixing block 207 is machined on the inner wall of the sliding seat 202 and fits against the bottom end of the connecting post 206.

[0028] The moving mechanism 3 includes a conical block 305, which is slidably connected to both ends of the inner wall of the sliding seat 202 and extends through the sliding seat 202 to the outer wall of the connecting seat 201. A connecting spring 306 is mechanically connected between the conical block 305 and the sliding seat 202.

[0029] By cooperating with each other among the internal parts of the clamping mechanism 2, lenses of different diameters can be clamped and fixed. The arc-shaped top plate 205 slides inside the clamping plate 203 according to the sliding distance of the clamping plate 203, and lifts the lens to be tested. After the lenses of different diameters are clamped and fixed on the clamping plate 203, their centers are at the same horizontal height as the light source module 101 and the light-transmitting plate 102. By cooperating with each other among the internal parts of the moving mechanism 3, the sliding seat 202 can slide on the connecting seat 201 to adjust its position.

[0030] Refer to the instruction manual appendix Figure 1-4 The moving mechanism 3 includes an imaging plate 301, which is slidably connected to the top of the fixture base 1 and located to the right of the light-transmitting plate 102. A sliding block 302 is mechanically connected to the bottom of the imaging plate 301 and is slidably connected inside the fixture base 1. A handle 303 is rotatably connected to the right side of the fixture base 1, and a threaded rod 304 is mechanically connected to the right side of the handle 303, extending through the interior of the fixture base 1. The sliding block 302 and the threaded rod 304 are threadedly engaged and slide together. Through the cooperation of the internal parts of the moving mechanism 3, the distance between the imaging plate 301 and the light-transmitting plate 102 can be adjusted.

[0031] Refer to the instruction manual appendix Figure 1-4 The inner wall of the sliding seat 202 is provided with a connecting groove that matches the connecting seat 201. The clamping plates 203 are provided with clamping grooves that match the lens to be tested. Flexible rubber rings are connected to both sides of the inner wall of the clamping groove. The clamping plates 203 are provided with clamping grooves that match the lens to be tested. Flexible rubber rings are connected to both sides of the inner wall of the clamping groove, which makes it easy for the clamping plates 203 to clamp and fix the lens to be tested.

[0032] Refer to the instruction manual appendix Figure 1-4 The top of the conical fixing block 207 and the bottom of the connecting column 206 are both conical surfaces. The top of the sliding seat 202 is provided with a moving groove that matches the clamping plate 203. The inner wall of the clamping plate 203 is provided with a telescopic groove that matches the arc-shaped top plate 205. Because the top of the conical fixing block 207 and the bottom of the connecting column 206 are both conical surfaces, and the inner wall of the clamping plate 203 is provided with a telescopic groove that matches the arc-shaped top plate 205, it is convenient for the clamping plate 203 to move and drive the arc-shaped top plate 205 to slide on the inner wall of the clamping plate 203, so that the diameter of the clamping groove on the inner wall of the clamping plate 203 changes.

[0033] Refer to the instruction manual appendix Figure 1-4 The outer wall of the connecting seat 201 is provided with a conical groove that matches the conical block 305, and the conical grooves are arranged at a certain interval. The interior of the sliding seat 202 is provided with a telescopic groove that matches the connecting spring 306. The conical groove on the outer wall of the connecting seat 201 matches the conical block 305, and the conical grooves are arranged at a certain interval, so that when the sliding seat 202 slides on the connecting seat 201, the operator can obtain the sliding distance of the sliding seat 202 according to the conical groove.

[0034] Refer to the instruction manual appendix Figure 1-4 The top of the tooling base 1 is provided with a sliding groove that matches the imaging plate 301 and the sliding block 302. The sliding block 302 is provided with an internal thread that matches the thread on the outer wall of the threaded rod 304. The top of the tooling base 1 is machined with a scale corresponding to the moving distance of the imaging plate 301. By using the scale corresponding to the moving distance of the imaging plate 301, the operator can easily obtain the distance between the imaging plate 301 and the light-transmitting plate 102.

[0035] The working principle of this practical application is as follows:

[0036] Refer to the instruction manual appendix Figure 1-4 By rotating the handle 303, the rotation of the handle 303 drives the threaded rod 304 to rotate. The rotation of the threaded rod 304 drives the sliding block 302 to slide inside the tooling base 1 through the thread. The sliding block 302 causes the top imaging plate 301 to slide on the top of the tooling base 1, thus completing the adjustment of the distance between the imaging plate 301 and the light-transmitting plate 102. By pushing the sliding seat 202, the conical block 305 on the inner wall of the sliding seat 202 contacts the conical groove on the outer wall of the connecting seat 201, and pushes the conical block 305 to compress the connecting spring 306 to retract and move. This allows the sliding seat 202 to slide on the connecting seat 201, thus adjusting the distance between the lens under test and the light source module 101.

[0037] Refer to the instruction manual appendix Figure 1-4By pushing the clamping plate 203 to compress the telescopic spring 204 and move it, the clamping plates 203 are moved away from each other, making it easier for the operator to place the lens to be tested between the clamping plates 203. After releasing the push on the clamping plate 203, the telescopic spring 204 returns to its original position and pushes the clamping plate 203 to move, thus completing the clamping and fixing of the lens to be tested. At the same time, the movement of the clamping plate 203 causes the connecting column 206 to move and contact the conical fixing block 207, allowing the conical fixing block 207 to pass through the conical surface. The connecting column 206 is moved, which causes the arc-shaped top plate 205 to move on the inner wall of the clamping plate 203. This changes the diameter of the clamping groove on the inner wall of the clamping plate 203, allowing the clamping plate 203 to clamp and fix lenses of different diameters. The arc-shaped top plate 205 also supports the lens under test, ensuring that after the lens under test of different diameters is clamped and fixed on the clamping plate 203, its center is at the same horizontal height as the light source module 101 and the light-transmitting plate 102.

[0038] The above description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A lens focal length detection tool, characterized by: Including tool base (1), the top end of tool base (1) is bolted with light source module (101), the right side of light source module (101) is fixedly connected with light transmission plate (102), and is located at the top end of tool base (1), the clamping mechanism (2) is installed between light source module (101) and light transmission plate (102), and is slidably connected to the top end of tool base (1), the right side of light transmission plate (102) is slidably connected with moving mechanism (3); The clamping mechanism (2) includes a connecting seat (201), which is mechanically connected to the top end of the tool base (1) and located between the light source module (101) and the light transmission plate (102), the outer wall of the connecting seat (201) is slidably sleeved with a sliding seat (202), the top end of the sliding seat (202) is slidably connected with a clamping plate (203), and the clamping plate (203) and the inner wall of the sliding seat (202) are connected with a telescopic spring (204), the inner wall of the clamping plate (203) is slidably connected with an arc-shaped top plate (205), the bottom end of the arc-shaped top plate (205) is mechanically connected with a connecting column (206), and penetrates to the bottom end of the clamping plate (203), the inner wall of the sliding seat (202) is mechanically processed with a tapered fixed block (207), and is attached to the bottom end of the connecting column (206). The moving mechanism (3) includes a tapered block (305), which is slidably connected to the inner wall of the sliding seat (202) at both ends and penetrates the sliding seat (202) to the outer wall of the connecting seat (201), the connecting spring (306) is mechanically connected between the tapered block (305) and the sliding seat (202).

2. The lens focal length detection tool of claim 1, wherein: The moving mechanism (3) includes an imaging plate (301), which is slidably connected to the top end of the tool base (1) and located on the right side of the light transmission plate (102), the bottom end of the imaging plate (301) is mechanically connected with a sliding block (302), and is slidably connected to the inside of the tool base (1), the right side of the handle (303) is rotatably connected with the tool base (1), the right side of the handle (303) is mechanically connected with a threaded rod (304), and penetrates to the inside of the tool base (1), the sliding block (302) and the outer wall of the threaded rod (304) are threadedly sleeved and slidably connected.

3. The lens focal length detection tool of claim 1, wherein: The inner wall of the sliding seat (202) is provided with a connecting groove matched with the connecting seat (201), the clamping grooves are provided between the clamping plates (203) and matched with the to-be-measured lens, and the inner wall of the clamping groove is connected with a flexible rubber ring.

4. The lens focal length detection tool of claim 1, wherein: The top end of the tapered fixed block (207) and the bottom end of the connecting column (206) are both tapered surfaces, the top end of the sliding seat (202) is provided with a moving groove matched with the clamping plate (203), and the inner wall of the clamping plate (203) is provided with an expansion slot matched with the arc-shaped top plate (205).

5. The lens focal length detection tool of claim 2, wherein: The outer wall of the connecting seat (201) is provided with a taper slot matched with the taper block (305), and the taper slots are arranged and distributed at a certain interval.

6. The lens focal length detection tool of claim 1, wherein: The top end of the tool base (1) is provided with a sliding slot matched with the imaging plate (301) and the sliding block (302), and the inner part of the sliding block (302) is provided with an internal thread matched with the external thread of the threaded rod (304), and the top end of the tool base (1) is mechanically processed with a scale corresponding to the moving distance of the imaging plate (301).

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