Detection instrument for optical lens

Abstract

The utility model relates to the technical field of optical lens detection, in particular to an optical lens detection instrument, which is characterized in that an upper box body is arranged at the top of a frame; a vertical plate is fixed on the upper box body; a light source assembly, an objective table and an industrial camera are sequentially arranged on the vertical plate from top to bottom in the height direction; and a light hole is formed in the middle of the objective table. When the lens detection device is used, in the structure, images are acquired through the camera for standard image comparison, so that the labor intensity of lens detection is reduced, and the false alarm rate is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of optical lens detection, and particularly relates to a detection instrument for optical lenses. Background Art

[0002] Optical lenses are often used in some precision optical devices, such as cameras, microscopes, projectors, lamps and other devices. The quality of the lens directly affects the quality of the precision device. Therefore, after the lens is formed and before it is assembled into the device, it is necessary to inspect the lens for defects.

[0003] In the existing lens inspection equipment, it consists of a lens holder, a light source and an imaging table; the lens to be tested is placed on the lens holder, and after the light source passes through the lens to be tested on the lens holder, the image is formed on the imaging table; then, the image on the imaging table is observed manually and compared with the image of the qualified product to judge whether the product is qualified. This comparison method has a large labor intensity, and relying on manual comparison of images is prone to misjudgment. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a detection instrument for optical lenses in view of the defects and deficiencies of the prior art.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A detection instrument for optical lenses according to the utility model includes a frame; an upper box body is arranged at the top of the frame; a vertical plate is fixed on the upper box body; a light source assembly, a stage and an industrial camera are arranged on the vertical plate in sequence from top to bottom in the height direction; a light-transmitting hole is arranged in the middle of the stage.

[0007] Further, light-shielding plates are sealed on each surface of the upper box body.

[0008] Further, the light-shielding plate is an opaque black acrylic plate.

[0009] Further, the light source assembly includes a pressing plate, a light source and a light source bracket fixed on the pressing plate; a first hand-operated bolt is rotatably connected to the pressing plate; a straight groove extending in the height direction is opened on the vertical plate; a limiting block embedded in the straight groove is arranged on the back of the pressing plate; the width of the limiting block is equal to the width of the straight groove; a nut is slidably connected to the back of the pressing plate; the first hand-operated bolt passes through the straight groove and is threadedly connected to the nut.

[0010] Further, a threaded hole is provided on the housing of the light source; a second bolt is threadedly connected to the threaded hole; a first opening groove is formed on the light source bracket; the length direction of the first opening groove is arranged horizontally; a gasket is sleeved outside the second bolt; the second bolt sequentially passes through the gasket and the first opening groove and then is threadedly connected to the threaded hole.

[0011] Further, a lifting guide rail extending in the height direction is fixed on the vertical plate; a lifting frame is fixed on the loading platform; a sliding block slidably connected to the lifting guide rail is fixed on the lifting frame; a third handle bolt is threadedly connected to the lifting frame; the end of the third handle bolt abuts against the vertical plate.

[0012] After adopting the above structure, the beneficial effects of the present utility model are as follows: For the optical lens detection instrument of the present utility model, a fixture paired with the lens to be measured is connected to the loading platform; after the lens is placed and positioned in the fixture, the light source assembly and the industrial camera are powered on, and the light of the pattern generated by the light source assembly irradiates the industrial camera after passing through the lens and the light-transmitting hole; after the industrial camera obtains the image formed by the lens, it is transmitted to the control circuit for comparison with the standard image to determine whether there are defects in the product lens; in this structure, by obtaining the image through the camera and comparing it with the standard image, the labor intensity of lens detection is reduced, and the false alarm rate is also reduced. Description of the Drawings

[0013] Figure 1 is the structural schematic diagram of the present utility model;

[0014] Figure 2 is the structural diagram of the light source assembly;

[0015] Figure 3 is Figure 1 the enlarged view of part A in

[0016] Description of the Reference Numerals:

[0017] 1. Light source assembly; 101. Nut; 102. First handle bolt; 103. Pressing plate; 103a. Limiting block; 104. Light source bracket; 104a. First opening groove; 105. Semi-transparent and semi-reflective filter; 106. Light source; 107. Second bolt; 108. Gasket; 2. Light-shielding plate; 3. Vertical plate; 301. Straight groove; 4. Industrial camera; 5. Loading platform; 6. Control electric box; 7. Frame; 701. Upper frame body; 8. Caster; 9. Lifting guide rail; 10. Sliding block; 11. Lifting frame; 12. Third handle bolt. Detailed Embodiments

[0018] The present utility model will be further described below with reference to the drawings.

[0019] As Figure 1As shown, a detection instrument for an optical lens according to the present utility model is as follows Figures 1 to 3 As shown, a detection instrument for an optical lens according to the present utility model includes a frame 7; an upper box body 701 is provided at the top of the frame 7; a vertical plate 3 is fixed on the upper box body 701; a light source assembly 1, a stage 5 and an industrial camera 4 are sequentially arranged on the vertical plate 3 from top to bottom in the height direction; a light-transmitting hole is provided in the middle of the stage 5;

[0020] Four corners at the bottom of the frame 7 are provided with casters 8; the lamp beads of the light source assembly 1 adopt warm white light of 6500K;

[0021] A control electric box 6 is arranged on the frame 7; a control circuit is arranged inside the control electric box 6; a display is installed on the frame 7, which can display the comparison result;

[0022] A jig used in pairing with the lens to be detected is connected to the stage 5; after the lens is placed and positioned in the jig, the light source assembly 1 and the industrial camera 4 are powered on, and the light of the pattern generated by the light source assembly 1 irradiates the industrial camera 4 after passing through the lens and the light-transmitting hole; after the industrial camera 4 obtains the image formed by the lens, it is transmitted to the control circuit for comparison with the standard image to determine whether there are defects in the product lens; the module for comparison on the control circuit has no essential difference from the prior art, so it will not be elaborated here; in this structure, the image is obtained by the camera for comparison with the standard image, which reduces the labor intensity of lens detection and reduces the false alarm rate.

[0023] As a preferred embodiment of the present utility model, light-shielding plates 2 are sealed on each surface of the upper box body 701; a door is opened on one of the side surfaces, and the door is in a closed state during detection; when the lens is placed on the stage 5, the door needs to be opened; the light-shielding plates 2 isolate the upper box body 701 where the light source assembly 1, the stage 5 and the industrial camera 4 are located into a dark space, which can reduce the influence of the surrounding ambient light on the inspection structure and improve the inspection accuracy.

[0024] As a preferred embodiment of the present utility model, the light-shielding plate 2 is an opaque black acrylic plate.

[0025] As a preferred embodiment of the present utility model, the light source assembly 1 includes a pressing plate 103, a light source 106 and a light source bracket 104 fixed on the pressing plate 103; a first handle bolt 102 is rotatably connected to the pressing plate 103; a straight groove 301 extending in the height direction is provided on the vertical plate 3; a limiting block 103a embedded in the straight groove 301 is arranged on the back of the pressing plate 103; the width of the limiting block 103a is equal to the width of the straight groove 301; a nut 101 is slidably connected to the back of the pressing plate 103; the first handle bolt 102 passes through the straight groove 301 and is threadedly connected to the nut 101;

[0026] A limiting groove extending in the height direction is provided on the back of the straight groove 301 for the insertion of the nut 101. After the nut 101 is inserted into the limiting groove, the rotation of the first handle bolt 102 will not drive the nut 101 to rotate; after the first handle bolt 102 is tightened on the nut 101, the light source assembly 1 is locked on the vertical plate 3. Loosen the first handle bolt 102 so that the first handle bolt 102 and the nut 101 release the clamping of the vertical plate 3, and the height of the light source assembly 1 can be adjusted to adapt to lenses with different refractive indexes.

[0027] As a preferred embodiment of the present invention, a threaded hole is provided on the housing of the light source 106; a second bolt 107 is threadedly connected to the threaded hole; a first opening groove 104a is formed on the light source bracket 104; the length direction of the first opening groove 104a is arranged horizontally; a gasket 108 is sleeved outside the second bolt 107; the second bolt 107 sequentially passes through the gasket 108 and the first opening groove 104a and is threadedly connected to the threaded hole; the second bolt 107 locks and positions the light source 106 on the light source bracket 104 so that the light source is coaxial with the lens; according to lenses with different diameters, loosening the second bolt 107 can adjust the position of the light source 106 so that the light source is coaxial with the lens; a semi-transmissive and semi-reflective filter 105 is arranged in the light-emitting direction of the light source 106, and the semi-transmissive and semi-reflective filter 105 can make the imaging clearer.

[0028] As a preferred embodiment of the present invention, a lifting guide rail 9 extending in the height direction is fixed on the vertical plate 3; a lifting frame 11 is fixed on the carrier table 5; a slider 10 slidably connected to the lifting guide rail 9 is fixed on the lifting frame 11; a third handle bolt 12 is threadedly connected to the lifting frame 11; the end of the third handle bolt 12 abuts against the vertical plate 3; after the third handle bolt 12 is locked on the vertical plate 3, the lifting frame 11 and the carrier table 5 cannot slide up and down, and loosening the clamping of the vertical plate 3 by the third handle bolt 12 can adjust the height between the carrier table 5 and the industrial camera 4 so that the imaging obtained by the industrial camera 4 is clearer.

[0029] The above is only a preferred embodiment of the present invention. Therefore, all equivalent changes or modifications made according to the structures, features and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims

1. An inspection instrument for optical lenses, characterized in that: It includes a frame (7); an upper box body (701) is arranged at the top of the frame (7); a vertical plate (3) is fixed on the upper box body (701); a light source assembly (1), a loading platform (5) and an industrial camera (4) are sequentially arranged on the vertical plate (3) from top to bottom in the height direction; a light-transmitting hole is arranged in the middle of the loading platform (5).

2. The detection instrument for an optical lens according to claim 1, wherein: Light-shielding plates (2) are sealed on each surface of the upper box body (701).

3. The inspection instrument for an optical lens according to claim 2, wherein: The light-shielding plates (2) are opaque black acrylic plates.

4. The detection instrument for an optical lens according to claim 1, characterized in that: The light source assembly (1) includes a pressing plate (103), a light source (106) and a light source support (104) fixed on the pressing plate (103); a first handle bolt (102) is rotatably connected to the pressing plate (103); a straight groove (301) extending in the height direction is formed in the vertical plate (3); a limiting block (103a) embedded in the straight groove (301) is arranged on the back of the pressing plate (103); the width of the limiting block (103a) is equal to the width of the straight groove (301); a nut (101) is slidably connected to the back of the pressing plate (103); the first handle bolt (102) passes through the straight groove (301) and is threadedly connected to the nut (101).

5. The detecting instrument for an optical lens according to claim 4, characterized in that: A threaded hole is formed in the shell of the light source (106); a second bolt (107) is threadedly connected to the threaded hole; a first opening groove (104a) is formed in the light source support (104); the length direction of the first opening groove (104a) is arranged in the horizontal direction; a gasket (108) is sleeved outside the second bolt (107); the second bolt (107) sequentially passes through the gasket (108) and the first opening groove (104a) and is threadedly connected to the threaded hole.

6. The detecting instrument for an optical lens according to claim 1, characterized in that: A lifting guide rail (9) extending in the height direction is fixed on the vertical plate (3); a lifting frame (11) is fixed on the loading platform (5); a slider (10) slidably connected to the lifting guide rail (9) is fixed on the lifting frame (11); a third handle bolt (12) is threadedly connected to the lifting frame (11); the end of the third handle bolt (12) abuts against the vertical plate (3).

Images