A mask edge inspection device

Abstract

This application relates to a device for inspecting the cutting edge of a light shield, comprising a testing bracket, a reflecting prism arranged on the testing bracket, a testing platform jacked up and down on the testing bracket for accommodating the light shield, a moving module connected to the testing platform for driving the platform up and down, and a testing mechanism for receiving and analyzing light information from the reflecting prism; the testing platform has a lifting through hole that cooperates with the testing bracket. This application has the advantage of being able to inspect the cutting edge thickness of a light shield without dissecting it.

Description

Technical Field

[0001] This application relates to the field of light shield testing technology, and in particular to a light shield blade edge inspection device. Background Technology

[0002] A lens hood is an important accessory for photographic lenses. Inside the lens hood are multiple aperture diaphragms, each gradually narrowing the light path entrance, which can block most of the non-image-forming light from outside the lens's field of view. The blade is located at the inner edge of the aperture diaphragm, which can work with the aperture diaphragms to block even more non-image-forming light, thus improving the light-blocking efficiency.

[0003] When inspecting a light shield, the thickness of the cutting edge needs to be measured. Due to the special location of the cutting edge and its small thickness, common testing equipment such as coordinate measuring machines (CMMs) and micrometers cannot directly measure it. The traditional method is to first cut open the machined light shield and then use a vision analyzer or micrometer to measure the thickness of each cutting edge.

[0004] However, since the light shield needs to be cut open before testing, the product will be scrapped, increasing the testing cost. At the same time, the blade will be damaged when cutting the metal during the actual processing, resulting in unsatisfactory blade consistency. Therefore, this destructive testing does not meet the actual engineering requirements. Utility Model Content

[0005] In order to detect the cutting edge thickness without cutting open the light shield, this application provides a light shield cutting edge inspection device.

[0006] The light shield blade edge inspection device provided in this application adopts the following technical solution: A light shield edge inspection device includes a testing bracket, a reflecting prism arranged on the testing bracket, a testing platform that is lifted and lowered on the testing bracket for arranging the light shield, a moving module connected to the testing platform for driving the testing platform to rise and fall, and a testing mechanism for receiving and analyzing light information from the reflecting prism; the testing platform has a lifting through hole that cooperates with the testing bracket.

[0007] By adopting the above technical solution, a light shield is placed on the testing table, which has a lifting through-hole that cooperates with the testing bracket. A reflecting prism is arranged on the testing bracket. Driven by the moving module, the testing table can move the light shield up and down. The operator adjusts the height of the light shield so that the cutting edge is directly facing the reflecting prism. The testing mechanism can receive and analyze the light information from the reflecting prism, thus allowing the cutting edge thickness to be tested without dissecting the light shield. This avoids destructive testing that could lead to product scrapping and helps reduce testing costs. Optionally, the detection bracket includes a prism support column and a prism seat detachably mounted on the prism support column, wherein the top of the prism support column has a first arrangement slot for arranging the prism seat.

[0008] By adopting the above technical solution, a prism mount that can be detachably installed on the prism support is provided on the detection bracket, and a first arrangement slot for arranging the prism mount is opened on the top of the prism support. Since the distance between the cutting edge located in different light blocking rings and the prism support is different, and the reflecting prism needs to be close to the cutting edge to reflect effective light information to the detection mechanism, the detachable structure of the prism mount makes it easy for operators to replace prism mounts of different specifications to meet the detection requirements.

[0009] Optionally, the bottom of the prism holder has a guide ramp for guiding insertion into the first arrangement slot.

[0010] By adopting the above technical solution, a guide slope is provided at the bottom of the prism base, which makes it easier for operators to smoothly insert the prism base into the first arrangement slot of the prism support, avoiding jamming or misalignment during installation and helping to improve installation efficiency.

[0011] Optionally, the testing station includes a mounting bracket connected to the mobile module and a rotating seat rotatably mounted on the mounting bracket for arranging a light shield, the rotating seat being coaxially arranged with the prism support.

[0012] By adopting the above technical solution, the testing station includes a mounting bracket and a rotating seat rotatably mounted on the mounting bracket. The light shield can rotate with the rotating seat, and in conjunction with the reflecting prism, it can inspect different positions around the circumference of the light shield's cutting edge, thereby detecting whether there are burrs or damage on the cutting edge, which helps to improve the comprehensiveness of the inspection.

[0013] Optionally, the mounting bracket includes a receiving portion for receiving the rotating seat and a connecting portion for connecting the movable module, the connecting portion being provided with a reinforcing plate.

[0014] By adopting the above technical solution, the structure of the mounting bracket is disclosed. The mounting bracket includes a connecting part connected to the moving module and a receiving part for receiving the rotating seat. The connecting part is provided with a reinforcing plate, which can enhance the structural strength of the connecting part, ensure the stability of the mounting bracket, and thus enable the testing table to operate more stably, which is conducive to improving the accuracy of the testing results.

[0015] Optionally, the receiving part has a second arrangement groove coaxial with the lifting through hole and a turntable bearing is provided in the second arrangement groove, and the rotating seat has an abutment groove that fits into the inner ring of the turntable bearing.

[0016] By adopting the above technical solution, a turntable bearing is installed in the second arrangement groove of the receiving part. The rotating seat fits against the inner ring of the turntable bearing through the abutment groove, which enables the rotating seat to rotate stably. This facilitates comprehensive inspection of the blade edge of the light shield and avoids affecting the inspection results due to unstable rotation, thus helping to improve the accuracy and reliability of the inspection.

[0017] Optionally, the detection bracket further includes a mounting base plate for arranging the prism support, the mounting base plate having a positioning groove for arranging the prism support.

[0018] By adopting the above technical solution, the positioning groove of the mounting base plate enables the prism support to be accurately positioned and arranged on the mounting base plate, ensuring the accuracy of the prism support installation position, thereby improving the assembly accuracy and stability of the entire light shield blade inspection device.

[0019] Optionally, the bottom of the prism support is provided with an internal mounting thread, and the mounting base plate is provided with a mounting through hole coaxially connected to the positioning groove and corresponding to the internal mounting thread, and a mounting screw that mates with the internal mounting thread is provided in the mounting through hole.

[0020] By adopting the above technical solution, a connection structure between the prism support and the mounting base plate is disclosed. The bottom of the prism support is provided with an internal mounting thread, and the mounting base plate and the prism support are connected by the thread structure, so that the connection strength between the two is ideal, thereby enabling the prism support to be stably installed in the positioning groove opened in the mounting base plate, ensuring the installation stability of the prism support.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. A light shield cutting edge inspection device, comprising a testing bracket, a reflective prism, a testing table, a moving module, and a testing mechanism, wherein the testing bracket includes a mounting base plate and a prism support column, and the testing table has a lifting through hole that cooperates with the prism support column, so that the cutting edge thickness can be tested without dissecting the light shield, thereby avoiding destructive testing that could lead to product scrapping and helping to reduce testing costs; 2. By setting a detachable prism mount on the detection bracket and providing a first arrangement slot for arranging the prism mount at the top of the prism mount, it is convenient for operators to replace the prism mount of the corresponding specification when detecting the cutting edge located in different light blocking rings. 3. By setting a rotating seat on the inspection table for arranging the light shield, and arranging the rotating seat coaxially with the prism support, the light shield can rotate with the rotating seat. In conjunction with the reflecting prism, different positions around the circumference of the light shield's cutting edge can be inspected, thereby detecting whether there are burrs or damage on the cutting edge. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the light shield in an embodiment of this application.

[0023] Figure 2 This is a cross-sectional schematic diagram of the light shield in an embodiment of this application.

[0024] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0025] Figure 4 This is a schematic diagram of the light shield blade inspection device in the embodiments of this application.

[0026] Figure 5 This is a partial cross-sectional schematic diagram of the light shield blade inspection device in the embodiments of this application.

[0027] Figure 6 yes Figure 5 A magnified view of a section at point B.

[0028] Explanation of reference numerals in the attached drawings: 1. Light shield; 11. Light blocking ring; 12. Blade edge; 2. Detection bracket; 21. Mounting base plate; 211. Positioning groove; 212. Mounting through hole; 213. Mounting screw; 22. Prism support; 221. Mounting internal thread; 222. First arrangement groove; 23. Prism seat; 231. Receiving plate; 232. Fixing column; 2321. Guide slope; 3. Reflecting prism; 4. Detection table; 41. Mounting bracket; 411. Connecting part; 4111. Reinforcing plate; 412. Receiving part; 4121. Second arrangement groove; 4122. Turntable bearing; 42. Rotating seat; 421. Abutment groove; 422. Lifting through hole; 5. Moving module; 6. Detection mechanism. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0030] This application discloses a device for inspecting the cutting edge of a light shield, used to detect the thickness of the cutting edge of a light shield. (Refer to...) Figures 1 to 3 The light shield 1 includes multiple coaxially arranged light-blocking rings 11. Each light-blocking ring 11 has a cutting edge 12 at its inner diameter edge. The inner diameter of the light-blocking rings gradually decreases from the outside to the inside, thereby reducing the light path entrance and blocking non-imaging light from outside the lens's field of view. The structures of the light-blocking rings 11 and the cutting edges 12 involved in this embodiment can be referenced. Figure 3 This will not be cited separately in the following text.

[0031] Reference Figure 4The light shield edge inspection device includes a testing bracket 2, a reflecting prism 3 arranged on the testing bracket 2, a testing platform 4 that is raised and lowered on the testing bracket 2 and used to arrange the light shield, a moving module 5 connected to the testing platform 4, and a testing mechanism 6. In this embodiment, the moving module 5 is a conventional Z-axis dovetail slide. The operator can drive the testing platform 4 to rise and fall by controlling the movement of the slider of the Z-axis dovetail slide, thereby driving the light shield to rise and fall. In this embodiment, the testing mechanism 6 is a conventional fully automatic image measuring instrument that can receive and analyze light information from the reflecting prism 3.

[0032] Reference Figure 5 The testing bracket 2 includes a mounting base plate 21, a prism support column 22 mounted on the mounting base plate 21, and a prism seat 23 detachably mounted on the prism support column 22. The mounting base plate 21 has a positioning groove 211 for arranging the prism support column 22, and a mounting through hole 212 coaxially connected to the bottom of the positioning groove 211. The bottom of the prism support column 22 has an internal mounting thread 221. The mounting base plate 21 has mounting screws 213 in the mounting through hole 212 that mate with the internal mounting thread 221. The prism support column 22 and the mounting base plate 21 are fixed together by threads, resulting in an ideal connection strength.

[0033] Reference Figure 6 The prism holder 23 includes a receiving plate 231 for arranging the reflecting prism 3 and a fixing post 232 coaxially connected to the bottom of the receiving plate 231. The top of the prism support 22 has a first arrangement slot 222 for arranging the fixing post 232 of the prism holder 23. The bottom of the fixing post 232 has a guide slope 2321 for guiding insertion into the first arrangement slot 222. The guide slope 2321 is inclined downward in the direction of the axis of the prism holder 23. Since the distance between the cutting edge located in different light blocking rings and the prism support 22 is different, the reflecting prism 3 needs to be close to the cutting edge to reflect effective light information. The setting of the first arrangement slot 222 and the guide slope 2321 makes it convenient for operators to replace prism holders 23 of different specifications to meet the detection requirements.

[0034] Reference Figure 4 and Figure 5The testing station 4 includes a mounting bracket 41 connected to the movable module 5 and a rotating seat 42 rotatably mounted on the mounting bracket 41 for arranging a light shield. The mounting bracket 41 includes a connecting part 411 threadedly connected to the movable module 5 and a receiving part 412 for receiving the rotating seat 42. The connecting part 411 is provided with a reinforcing plate 4111 to ensure the stability of the mounting bracket 41. The receiving part 412 has a second arrangement groove 4121 and a turntable bearing 4122 is provided in the second arrangement groove 4121. The rotating seat 42 has an abutment groove 421 that fits against the inner ring of the turntable bearing 4122. The inspection table 4 has a lifting through hole 422 on the rotating seat 42 for the prism support 22 to pass through. The lifting through hole 422, the prism support 22, and the second arrangement groove 4121 are all coaxial. The operator can rotate the rotating seat 42 to drive the light shield to rotate. With the help of the reflecting prism 3, the operator can inspect different positions around the edge of the light shield, thereby detecting whether there are burrs or damage on the edge.

[0035] The implementation principle of the light shield blade edge inspection device in this application embodiment is as follows: After the operator installs the light shield onto the inspection table 4 of the inspection device, the operator selects the corresponding specification of the prism seat 23 according to the light blocking ring where the blade edge to be inspected is located, and arranges the reflective prism 3 seat 23 on the prism seat 23. Then, the operator drives the light shield to rise and fall through the moving module 5 so that the blade edge to be inspected is facing the reflective prism 3. After that, the operator rotates the rotating seat 42 of the inspection table 4 to drive the light shield to rotate. The reflective prism 3 can reflect the light information of different positions around the blade edge of the light shield to the inspection mechanism 6, so that the blade edge thickness can be detected without cutting open the light shield, and at the same time, it can detect whether there are burrs or damage on the blade edge.

[0036] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A device for inspecting the blade edge of a light shield, characterized in that, The device includes a detection bracket (2), a reflecting prism (3) arranged on the detection bracket (2), a detection platform (4) that is raised and lowered on the detection bracket (2) and used for arranging a light shield, a moving module (5) connected to the detection platform (4) and used for driving the detection platform (4) to rise and fall, and a detection mechanism (6) for receiving and analyzing light information from the reflecting prism (3); the detection platform (4) has a lifting through hole (422) that cooperates with the detection bracket (2).

2. The blade edge inspection apparatus of claim 1, wherein, The detection bracket (2) includes a prism support (22) and a prism seat (23) detachably mounted on the prism support (22). The top of the prism support (22) is provided with a first arrangement groove (222) for arranging the prism seat (23).

3. The blade edge inspection apparatus of claim 2, wherein, The bottom of the prism holder (23) has a guide ramp (2321) for guiding insertion into the first arrangement slot (222).

4. The blade edge inspection apparatus of claim 2, wherein, The testing station (4) includes a mounting bracket (41) connected to the mobile module (5) and a rotating seat (42) rotatably mounted on the mounting bracket (41) for arranging a light shield. The rotating seat (42) is coaxially arranged with the prism support (22).

5. An edge inspection apparatus for a photomask according to claim 4, wherein The mounting bracket (41) includes a receiving part (412) for receiving the rotating seat (42) and a connecting part (411) for connecting the moving module (5), and the connecting part (411) is provided with a reinforcing plate (4111).

6. An edge inspection apparatus for a photomask according to claim 5, wherein The receiving part (412) has a second arrangement groove (4121) coaxial with the lifting through hole (422) and a turntable bearing (4122) is provided in the second arrangement groove (4121). The rotating seat (42) has an abutment groove (421) that fits into the inner ring of the turntable bearing (4122).

7. The blade edge inspection apparatus of claim 2, wherein, The detection bracket (2) also includes a mounting base plate (21) for arranging the prism support (22), and the mounting base plate (21) has a positioning groove (211) for arranging the prism support (22).

8. The blade edge inspection apparatus of claim 7, wherein, The prism support (22) has an internal mounting thread (221) at its bottom, and the mounting base plate (21) has a mounting through hole (212) coaxially connected to the positioning groove (211) and corresponding to the internal mounting thread (221). The mounting through hole (212) is provided with a mounting screw (213) that mates with the internal mounting thread (221).

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