An eccentricity detection device for a special-shaped lens

Abstract

The utility model relates to the field of lens detection discloses a special-shaped lens eccentricity detection device, include: transmission type centering instrument, rotate and install rotatory table on transmission type centering instrument, be provided with centering mechanism on rotatory table, the centering mechanism includes moving piece one, guide piece, clamping piece one, spring, rubber pad one and locking screw, moving piece one transverse sliding installation is in rotatory table, guide piece fixed mounting is on moving piece one, clamping piece one sliding sets up in the outside of guide piece, spring fixed mounting is between guide piece and clamping piece one, rubber pad one side surface and clamping piece one fixed connection, locking screw rotatory installation is in the side of moving piece one, locking screw screw installation is in rotatory table, the utility model has the following advantages and effect: can make the center of special-shaped lens and rotatory platform coaxial quickly, guarantee the efficiency of detection.

Description

Technical Field

[0001] This utility model relates to the field of lens testing technology, and in particular to a device for detecting the eccentricity of irregularly shaped lenses. Background Technology

[0002] In the field of optics, the quality of a lens plays a crucial role in the performance of an optical system. Lens eccentricity is a key factor affecting its quality. With the continuous development of technology, optical systems are increasingly widely used in various fields, such as digital cameras, smartphones, and optical instruments. These devices place increasingly higher demands on lens precision; therefore, accurately measuring lens eccentricity has become particularly important. Transmission centering instruments are the most frequently used instruments for optical measurement.

[0003] Existing lens eccentricity detection devices are mostly designed for round lenses. They use four clamping plates to simultaneously move towards the center to center and clamp the lens, ensuring that the lens is coaxial with the rotating platform. However, for irregularly shaped lenses, such as octagonal lenses, it is not convenient to quickly make the lens center coaxial with the rotating platform, which will affect the detection efficiency. Therefore, it is necessary to design an irregularly shaped lens eccentricity detection device to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a device for detecting the eccentricity of irregularly shaped lenses, so as to solve the above-mentioned problems.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a device for detecting the eccentricity of irregularly shaped lenses, comprising:

[0006] A transmission-type centering instrument, wherein a rotating platform is rotatably mounted on the transmission-type centering instrument, and a centering mechanism is provided on the rotating platform;

[0007] The centering mechanism includes a moving part, a guide part, a clamping part, a spring, a rubber pad, and a locking screw;

[0008] The first movable component is slidably mounted on the rotating platform. The guide component is fixedly mounted on the first movable component. The first clamping component is slidably sleeved on the outside of the guide component. The spring is fixedly mounted between the guide component and the first clamping component. The side of the first rubber pad is fixedly connected to the first clamping component. The locking screw is rotatably mounted on the side of the first movable component. The locking screw is threadedly mounted on the rotating platform.

[0009] Preferably, the centering mechanism further includes a second movable component, a second rubber pad, and a rotating shaft. The second movable component is laterally slidably mounted on the rotating platform along the front-back direction. The side of the second movable component is fixedly connected to the second rubber pad. The rotating shaft is rotatably mounted on the rotating platform. The outer side of the rotating shaft is provided with a bidirectional thread. The front side of the second movable component is provided with a threaded hole. The bidirectional thread is threadedly connected to the threaded hole.

[0010] Preferably, the centering mechanism further includes a vertical plate, a scale plate, and an indicator frame. The vertical plate is fixedly installed on the top of the rotating platform, the side of the scale plate is fixedly connected to a moving part, and the side of the indicator frame is fixedly connected to the vertical plate.

[0011] By adopting the above technical solution, the moving distance of the clamping component can be precisely controlled.

[0012] Preferably, an irregularly shaped lens is placed on the top of the rotating platform, with rubber pad one abutting against the irregularly shaped lens and rubber pad two abutting against the irregularly shaped lens.

[0013] Preferably, the top of the rotating platform has a movable groove, and the movable component is slidably installed in the movable groove.

[0014] By adopting the above technical solution, the moving part can move stably.

[0015] Preferably, the top of the rotating platform is provided with a second movable groove, and the second movable component is slidably installed in the second movable groove.

[0016] By adopting the above technical solution, the second moving part can move stably.

[0017] Preferably, the rotating platform has a locking screw hole, and the locking screw is threaded into the locking screw hole.

[0018] Preferably, a rectangular hole is provided on the side of the upright plate, and the side of the scale plate passes through the rectangular hole.

[0019] Preferably, there are two clamping members, and the two clamping members are arranged symmetrically on the left and right.

[0020] Preferably, there are two movable parts, and the two movable parts are arranged symmetrically front to back.

[0021] The beneficial effects of this utility model are:

[0022] This utility model, through its centering mechanism, adopts a centering structure that allows for independent adjustment of the left and right sides and the front and back sides, replacing the traditional four-claw synchronous clamping method for circular lenses. The left and right sides use scale plates to precisely control the clamping distance, while the front and back sides achieve adaptive centering through a bidirectional threaded rotating shaft. This allows the center of irregularly shaped lenses to be quickly aligned with the rotating platform, significantly reducing centering time and adapting to the inspection needs of irregularly shaped lenses such as octagonal lenses. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of an irregularly shaped lens eccentricity detection device proposed in this utility model. Figure 1 .

[0025] Figure 2 This is a schematic diagram of the structure of an irregularly shaped lens eccentricity detection device proposed in this utility model. Figure 2 .

[0026] Figure 3 yes Figure 2 A schematic diagram of part A in the diagram.

[0027] Figure 4 yes Figure 2 A schematic diagram of part B in the diagram.

[0028] Figure 5 yes Figure 2 A schematic diagram of part C in the diagram.

[0029] In the diagram: 1. Transmission-type centering instrument; 2. Rotating platform; 3. Irregularly shaped lens; 4. Moving slot one; 5. Moving part one; 6. Guide component; 7. Clamping part one; 8. Spring; 9. Rubber pad one; 10. Vertical plate; 11. Scale plate; 12. Indicator frame; 13. Moving slot two; 14. Moving part two; 15. Rubber pad two; 16. Rotating shaft; 17. Locking screw. Detailed Implementation

[0030] The technical solution of this utility model will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0031] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 This utility model provides a device for detecting the eccentricity of irregularly shaped lenses, comprising:

[0032] Transmission-type centering instrument 1, on which a rotating platform 2 is rotatably mounted, and a centering mechanism is provided on the rotating platform 2. It should be noted that the center of the irregular lens 3 can be quickly made coaxial with the rotating platform 2, ensuring the efficiency of the test.

[0033] The centering mechanism includes a moving part 5, a guide part 6, a clamping part 7, a spring 8, a rubber pad 9, and a locking screw 17;

[0034] The movable part 5 is slidably mounted on the rotating platform 2, the guide part 6 is fixedly mounted on the movable part 5, the clamping part 7 is slidably sleeved on the outside of the guide part 6, and the spring 8 is fixedly mounted between the guide part 6 and the clamping part 7. It should be noted that two springs 8 are provided on one clamping part 7 so that the clamping parts 7 on both sides are in the middle position.

[0035] The side of the rubber pad 9 is fixedly connected to the clamping part 7, and the locking screw 17 is rotatably mounted on the side of the moving part 5. The locking screw 17 is threadedly mounted on the rotating platform 2.

[0036] With the above structure, the irregular lens 3 is placed at the center of the rotating platform 2, and then the locking screws 17 on both sides are rotated to move the clamping member 7 towards the irregular lens 3. The movement distance of the clamping member 7 is precisely controlled by observing the reading on the scale plate 11. By adjusting the movement distance of the clamping members 7 on both sides to be consistent, the irregular lens 3 is centered in the left and right direction, and finally the rubber pad 9 clamps the irregular lens 3.

[0037] Specifically, the centering mechanism also includes a second movable part 14, a second rubber pad 15, and a rotating shaft 16. The second movable part 14 is slidably mounted on the rotating platform 2 along the front-back direction. The side of the second movable part 14 is fixedly connected to the second rubber pad 15. The rotating shaft 16 is rotatably mounted on the rotating platform 2. The outer side of the rotating shaft 16 is provided with a bidirectional thread. The front side of the second movable part 14 is provided with a screw hole, and the bidirectional thread is threadedly connected to the screw hole.

[0038] With the above structure, rotating the shaft 16 allows the two moving parts 14 to move towards each other in the front-back direction. The moving parts 14 drive the rubber pads 15 to move. When the irregular lens 3 has a deviation in its front-back position, one rubber pad 15 will first abut against the irregular lens 3 and push the irregular lens 3 to move. This allows the rubber pad 9 and the clamping part 7 to move synchronously, causing the clamping part 7 to compress one spring 8 and stretch another spring 8 until the two rubber pads 15 press against the other two sides of the irregular lens 3. This allows the center of the irregular lens 3 to be quickly made coaxial with the rotating platform 2, ensuring the efficiency of the detection. After manually rotating the lens one revolution, the eccentricity is analyzed by measuring the movement trajectory of the beam passing through the image point of the irregular lens 3 using a sensor.

[0039] It should be added that the laser is positioned directly above the irregularly shaped lens 3 in the transmission centering device 1. The rotating platform 2 has a cavity inside, with a light-transmitting hole at the top center of the cavity. A PSD sensor is positioned directly below the light-transmitting hole inside the cavity. The laser emits a parallel detection beam, which passes through the irregularly shaped lens 3 and the light-transmitting hole before being transmitted to the PSD sensor. When the rotating platform 2 is manually rotated one revolution, the eccentricity of the irregularly shaped lens 3 causes the optical path of the transmitted beam to shift. The PSD sensor collects the motion trajectory of the image point formed after the beam passes through the lens in real time. The control system of the transmission centering device analyzes the trajectory of the image point and calculates the actual eccentricity of the irregularly shaped lens 3 by combining the center offset of the trajectory with the magnification of the optical system. This is the working process of the transmission centering device 1 in the prior art, which will not be elaborated here.

[0040] Specifically, the centering mechanism also includes a vertical plate 10, a scale plate 11, and an indicator frame 12. The vertical plate 10 is fixedly installed on the top of the rotating platform 2, the side of the scale plate 11 is fixedly connected to the moving part 5, and the side of the indicator frame 12 is fixedly connected to the vertical plate 10.

[0041] With the above structure, the indicator 12 points to the scale plate 11, and the movement distance of the clamping member 7 is precisely controlled by observing the reading on the scale plate 11. By adjusting the movement distance of the clamping members 7 on both sides to be consistent, the irregular lens 3 is centered in the left and right direction.

[0042] Specifically, an irregularly shaped lens 3 is placed on top of the rotating platform 2. Rubber pad 1 9 abuts against the irregularly shaped lens 3, and rubber pad 2 15 abuts against the irregularly shaped lens 3. It should be noted that the irregularly shaped lens 3 is subjected to abutment limiting and centering treatment.

[0043] It should be added that the irregular lens 3 in this utility model is mainly for long strip-shaped lenses, and is formed by cutting at the four corners.

[0044] Specifically, the top of the rotating platform 2 is provided with a first moving groove 4, and the first moving part 5 is slidably installed in the first moving groove 4. The top of the rotating platform 2 is provided with a second moving groove 13, and the second moving part 14 is slidably installed in the second moving groove 13. It should be noted that this allows the first moving part 5 to move stably in the left-right direction and the second moving part 14 to move stably in the front-back direction.

[0045] Specifically, the rotating platform 2 has a locking screw hole, and the locking screw 17 is threaded into the locking screw hole. The side of the upright plate 10 has a rectangular hole, and the side of the scale plate 11 passes through the rectangular hole. It should be noted that the locking screw 17 is wrapped with sealing tape, which can increase the friction of the locking screw 17 threaded into the locking screw hole, thereby effectively improving the stability of the locking screw 17 after it is screwed into a certain position. Through the setting of the rectangular hole, when correcting and aligning the front and rear positions of the irregular lens 3, the clamping part 7 has a small range of front and rear movement to meet the small range of correction and alignment requirements.

[0046] Specifically, there are two clamping parts 7, which are arranged symmetrically from left to right. There are also two moving parts 14, which are arranged symmetrically from front to back. It should be noted that the irregular lens 3 is subjected to contact, limiting and centering treatment from four sides.

[0047] Working principle:

[0048] S1: Place the irregularly shaped lens 3 to be tested in the center area of ​​the rotating platform 2, and rotate the locking screws 17 on both sides. Since the locking screws 17 are threadedly connected to the locking screw holes of the rotating platform 2 and rotate in cooperation with the moving part 5, when the locking screws 17 rotate, they push the moving part 5 to slide laterally along the moving groove 4. The moving part 5 drives the guide part 6, the clamping part 7 and the rubber pad 9 to move closer to the irregularly shaped lens 3 simultaneously. At this time, observe the reading on the scale plate 11 through the indicator frame 12 on the upright plate 10, and accurately adjust the moving distance of the moving parts 5 on both sides to ensure that the clamping parts 7 on both sides move closer simultaneously. When the rubber pad 9 contacts the left and right sides of the irregularly shaped lens 3, continue to fine-tune the locking screws 17 to complete the centering and positioning of the irregularly shaped lens in the left and right directions.

[0049] S2: After left and right alignment is completed, rotate shaft 16. Since shaft 16 has a bidirectional thread on the outside and is threaded to the screw holes of the two moving parts 14, when shaft 16 rotates, it drives the two moving parts 14 to move back and forth along the moving groove 13. The moving parts 14 drive the rubber pads 15 to move closer to the irregular lens 3. If the irregular lens 3 is offset in front and back, one side of the rubber pad 15 will contact the lens first and push it to move. The lens drives the clamping parts 7 on both sides to slide along the guide 6, so that one side of the spring 8 is compressed and the other side of the spring 8 is stretched until both rubber pads 15 are in close contact with the front and back sides of the irregular lens 3. The elastic restoring force of the spring 8 and the clamping force of the rubber pad 15 are balanced. The irregular lens 3 is automatically aligned in the front and back direction. At this time, the center of the irregular lens 3 coincides with the axis of the rotating platform 2, and the omnidirectional alignment and positioning is completed.

[0050] S3: After centering is completed, the transmission centering instrument 1 is activated. The laser on its top emits a parallel detection beam. After the beam passes through the irregular lens 3, it is transmitted to the PSD sensor in the cavity through the light-transmitting hole in the center of the rotating platform 2. The rotating platform 2 is manually rotated one revolution. If the irregular lens 3 is eccentric, it will cause the light path of the transmission beam to shift periodically. The PSD sensor collects the motion trajectory of the image point after the shift in real time. The control system of the transmission centering instrument analyzes the trajectory data. By calculating the offset between the trajectory center and the axis of the rotating platform, and combining the magnification of the optical system, the actual eccentricity of the irregular lens 3 is accurately obtained, and the eccentricity detection is completed.

[0051] S4: After the inspection is completed, rotate the shaft 16 in the opposite direction to separate the two moving parts 14 and release the clamping in the front and back directions; then rotate the locking screws 17 on both sides in the opposite direction to pull the moving part 5 and move the clamping part 7 away from the irregular lens 3 and release the clamping in the left and right directions. At this time, the irregular lens 3 that has been inspected can be removed directly. After replacing it with a new lens to be inspected, repeat the above centering process to enter the next round of inspection.

[0052] The above provides a detailed description of the eccentricity detection device for irregularly shaped lenses provided by this utility model. Specific embodiments have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make several improvements and modifications to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A device for detecting the eccentricity of a shaped lens, characterized in that, include: A transmission-type centering instrument (1) is provided with a rotating platform (2) rotatably mounted on the transmission-type centering instrument (1), and a centering mechanism is provided on the rotating platform (2). The centering mechanism includes a moving part (5), a guide part (6), a clamping part (7), a spring (8), a rubber pad (9), and a locking screw (17). The first movable part (5) is slidably mounted on the rotating platform (2). The guide part (6) is fixedly mounted on the first movable part (5). The first clamping part (7) is slidably sleeved on the outside of the guide part (6). The spring (8) is fixedly mounted between the guide part (6) and the first clamping part (7). The side of the first rubber pad (9) is fixedly connected to the first clamping part (7). The locking screw (17) is rotatably mounted on the side of the first movable part (5). The locking screw (17) is threadedly mounted on the rotating platform (2).

2. The device for detecting the eccentricity of a special-shaped lens according to claim 1, wherein The centering mechanism also includes a second movable part (14), a second rubber pad (15), and a rotating shaft (16). The second movable part (14) is slidably mounted on the rotating platform (2) along the front-back direction. The side of the second movable part (14) is fixedly connected to the second rubber pad (15). The rotating shaft (16) is rotatably mounted on the rotating platform (2). The outer side of the rotating shaft (16) is provided with a bidirectional thread. The front side of the second movable part (14) is provided with a screw hole. The bidirectional thread is threadedly connected to the screw hole.

3. The device for detecting the eccentricity of a special-shaped lens according to claim 1, wherein, The centering mechanism also includes a vertical plate (10), a scale plate (11), and an indicator frame (12). The vertical plate (10) is fixedly installed on the top of the rotating platform (2). The side of the scale plate (11) is fixedly connected to the moving part (5), and the side of the indicator frame (12) is fixedly connected to the vertical plate (10).

4. The device for detecting the eccentricity of a special-shaped lens according to claim 2, characterized in that, The rotating platform (2) has an irregularly shaped lens (3) placed on top. Rubber pad one (9) abuts against the irregularly shaped lens (3), and rubber pad two (15) abuts against the irregularly shaped lens (3).

5. The device for detecting the eccentricity of a special-shaped lens according to claim 1, wherein, The rotating platform (2) has a moving slot (4) on its top, and the moving part (5) is horizontally slidably installed in the moving slot (4).

6. The device for detecting the eccentricity of a special-shaped lens according to claim 2, wherein The rotating platform (2) has a movable slot (13) on its top, and the movable component (14) is slidably installed in the movable slot (13).

7. The device for detecting the eccentricity of a special-shaped lens according to claim 1, wherein, The rotating platform (2) has a locking screw hole, and the locking screw (17) is threaded into the locking screw hole.

8. The device for detecting the eccentricity of a special-shaped lens according to claim 3, characterized in that, The upright plate (10) has a rectangular hole on its side, and the scale plate (11) passes through the rectangular hole on its side.

9. The device for detecting the eccentricity of a special-shaped lens according to claim 1, wherein, The number of clamping components 1 (7) is two, and the two clamping components 1 (7) are arranged symmetrically on the left and right.

10. The device for detecting the eccentricity of a special-shaped lens according to claim 2, wherein, The number of the two movable parts (14) is two, and the two movable parts (14) are arranged symmetrically in front of and behind each other.

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