Lens surface quality detection device

Abstract

The utility model relates to lens detection technical field, and disclose a kind of lens surface quality detection device, including supporting mechanism and contact mechanism and detection mechanism, in which: the contact mechanism includes support plate, driven gear, cushion block, guide rod and ruby probe, the support plate is set in the top of supporting mechanism, the driven gear rotatable connection in the middle part of support plate, the cushion block slidable connection in the middle part of driven gear, multiple the guide rod slidable insertion in the top of cushion block, the ruby probe screw connection in the bottom end of guide rod.The lens surface quality detection device, driven gear rotatable connection in the middle part of support plate in contact mechanism, and cushion block, guide rod and ruby probe are all assembled on driven gear, driven gear can drive probe to do annular scanning around lens surface when rotating, can significantly improve the coverage of lens surface quality detection, reduce the missing of quality hidden trouble due to the limitation of detection range.

Description

Technical Field

[0001] This utility model relates to the field of lens inspection technology, specifically to a lens surface quality inspection device. Background Technology

[0002] In the field of optical lens manufacturing, microscopic parameters such as surface flatness and smoothness directly determine the optical imaging quality. Therefore, high-precision full-surface inspection is a core element in ensuring product performance.

[0003] For spherical lenses, their curved structure generates multiple reflections during dark-field imaging, disrupting the contrast between defects and the background and causing submicron-level scratches, dents, and other defects at the edges or abrupt changes in curvature to be missed. Aspherical lenses, due to their complex surface shapes and diverse sizes, cannot be adapted to the undulations of curved surfaces by existing fixed probes or single-direction scanning structures. They can only cover the central local area and have extremely weak ability to capture tiny defects at the edges and irregular curved surfaces. In some cases, data needs to be stitched together through multi-view scanning, which is not only inefficient but also prone to introducing new blind spots due to stitching errors. Even when using non-contact technologies such as optical scanning, signal distortion can occur due to the transparency or reflectivity of the lens, further expanding the scope of missed detections and making it difficult to meet the stringent requirements for full-surface inspection of lenses. Utility Model Content

[0004] This invention provides a lens surface quality inspection device that can avoid lens contact damage by relying on the high hardness and smoothness of the ruby ​​probe, and can effectively unify lens protection and inspection accuracy by cooperating with the inspection mechanism to detect the displacement distance of the ruby ​​probe.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] Design a lens surface quality inspection device, including a support mechanism, a contact mechanism, and a detection mechanism, wherein:

[0007] The contact mechanism includes a support plate, a driven gear, a pad, a guide rod, and a ruby ​​probe. The support plate is disposed above the support mechanism. The driven gear is rotatably connected to the middle of the support plate. The pad is slidably connected to the middle of the driven gear. A plurality of guide rods are slidably inserted into the top of the pad. The ruby ​​probe is threadedly connected to the bottom end of the guide rod.

[0008] The detection mechanism is located on the outside of the contact mechanism and is used to detect the displacement distance of the guide rod.

[0009] Optionally, the support mechanism includes a support base, guide grooves, and positioning blocks. Multiple guide grooves are formed on the top of the support base, and the positioning blocks are slidably connected to the inner wall of the guide grooves.

[0010] Optionally, the support mechanism further includes a fastening bolt, the fastening bolt being threaded through the top of the positioning block, and one end of the fastening bolt protruding from the positioning block abutting against the inner bottom wall of the guide groove.

[0011] Optionally, a height adjustment mechanism is provided above the support mechanism. The height adjustment mechanism includes a positioning seat, a positioning shaft, and a threaded cylinder. The four positioning seats are fixedly installed at the four corners of the top of the support seat. The positioning shaft is rotatably inserted into the inner wall of the positioning seat, and the threaded cylinder is fixedly installed at the top of the positioning shaft.

[0012] Optionally, the height adjustment mechanism further includes a fixing block and a threaded rod. The fixing block is fixedly installed on the bottom of the support plate, and the threaded rod is fixedly installed on the bottom of the fixing block. The outer surface of the threaded rod is threadedly connected to the inner wall of the threaded cylinder.

[0013] Optionally, the contact mechanism further includes guide holes, a plurality of guide holes being formed on the top of the pad, and the inner wall of the guide hole being slidably connected to the outer surface of the guide rod.

[0014] Optionally, the detection mechanism includes a chute, a slider, an adjusting plate, a grating sensor, and an anti-slip pad. The chute is formed on the outer wall of the support plate, the slider is slidably connected to the inner wall of the chute, the outer surface of the slider is fixedly connected to the outer wall of the adjusting plate, the grating sensor is fixedly installed on the top of the adjusting plate, and the anti-slip pad is fixedly installed on the outer wall of the support plate, with its outer surface in contact with the inner side of the adjusting plate.

[0015] Optionally, the support plate is provided with a drive mechanism, which includes a drive motor and a drive gear. The drive motor is fixedly installed at the bottom of the support plate, and one end of the drive motor's output end that passes through the support plate contacts the drive gear through a key. The outer surface of the drive gear meshes with the outer wall of the driven gear.

[0016] This invention provides a lens surface quality inspection device, which has the following advantages:

[0017] This lens surface quality inspection device features a driven gear rotatably connected to the center of a support plate in its contact mechanism. The pad, guide rod, and ruby ​​probe are all mounted on the driven gear. When the driven gear rotates, it drives the probe to perform a circular scan around the lens surface, rather than just inspecting a localized area. This significantly improves the coverage of lens surface quality inspection, effectively reducing the omission of potential quality issues due to limited inspection range. The inspection mechanism judges the lens surface quality by detecting the displacement distance of the guide rod. When the ruby ​​probe contacts the lens surface, the surface's unevenness directly drives the guide rod to produce a corresponding displacement, accurately capturing key quality parameters such as the lens surface's flatness and smoothness. This avoids the accuracy loss caused by indirect inspection. The ruby ​​probe, with its high hardness, wear resistance, and smooth surface, is less prone to scratches or wear compared to ordinary metal or plastic probes. It effectively protects the surface integrity of the lens during inspection, making it particularly suitable for the quality inspection of high-precision optical lenses. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall installation structure of this utility model;

[0019] Figure 2 This is an exploded view of the height adjustment mechanism of this utility model;

[0020] Figure 3 This is a schematic diagram of the exploded structure of the testing mechanism of this utility model;

[0021] Figure 4 This is a schematic diagram of the exploded structure of the contact mechanism of this utility model.

[0022] In the diagram: 1. Support mechanism; 101. Support seat; 102. Guide groove; 103. Positioning block; 104. Fastening bolt; 2. Height adjustment mechanism; 201. Positioning seat; 202. Positioning shaft; 203. Threaded cylinder; 204. Fixing block; 205. Threaded rod; 3. Contact mechanism; 301. Support plate; 302. Driven gear; 303. Pad; 304. Guide hole; 305. Guide rod; 306. Ruby probe; 4. Detection mechanism; 401. Slide groove; 402. Slider; 403. Adjustment plate; 404. Grating sensor; 405. Anti-slip pad; 5. Drive mechanism; 501. Drive motor; 502. Drive gear. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] Please see Figures 1 to 4 This utility model provides a testing device for inspecting the lens surface after production. This embodiment improves the structure of the testing device to eliminate blind spots and enhance coverage. Specifically, taking lens inspection as an example, as a preferred embodiment, the testing device is a lens surface quality testing device, capable of more comprehensive inspection of the lens surface.

[0025] Please see Figures 1 to 4 This utility model provides a technical solution: a lens surface quality inspection device. This cutting machine is mainly used in scenarios where the lens surface is inspected after the lens is produced.

[0026] It includes support mechanism 1, contact mechanism 3, and testing mechanism 4, wherein:

[0027] The contact mechanism 3 includes a support plate 301, a driven gear 302, a pad 303, a guide rod 305, and a ruby ​​probe 306. The support plate 301 is disposed above the support mechanism 1. The driven gear 302 is rotatably connected to the middle of the support plate 301. The pad 303 is slidably connected to the middle of the driven gear 302. Multiple guide rods 305 are slidably inserted into the top of the pad 303. The ruby ​​probe 306 is threadedly connected to the bottom end of the guide rod 305.

[0028] The detection mechanism 4 is located on the outside of the contact mechanism 3 and is used to detect the displacement distance of the guide rod 305.

[0029] In this embodiment, the support plate 301 serves as the mounting carrier for the contact mechanism 3, supporting the driven gear 302, the drive mechanism 5, and some components of the detection mechanism 4. It provides a unified mounting reference for all moving parts, ensuring the coaxiality of the driven gear 302's rotation center with the lens center, thus improving scanning accuracy. The driven gear 302 is rotatably connected to the middle of the support plate 301, with the top supporting components such as the pad 303 and guide rod 305. It rotates by meshing with the drive gear 502, driving the ruby ​​probe 306 to perform a 360° circular scan around the lens, covering the entire surface from the lens center to the edge, eliminating the detection blind zone of the fixed probe. The pad 303 is slidably connected to the middle of the driven gear 302, providing an installation position for the guide rod 305. By sliding and adjusting the radial position of the guide rod 305, it adapts to lenses of different diameters, allowing the ruby ​​probe 306 to accurately align with different radial positions on the lens, further expanding the detection coverage. (Guide hole...) 304 is located at the top of the pad 303, providing sliding guidance for the guide rod 305. It limits the guide rod 305 to move only along the axial direction, preventing radial offset when the guide rod 305 slides. This ensures that the displacement of the guide rod 305 corresponds perfectly to the unevenness of the lens surface, improving the accuracy of displacement transmission. The bottom end of the guide rod 305 is connected to the ruby ​​probe 306, and the top end corresponds to the grating sensor 404. It converts the surface undulations in contact with the probe into its own axial displacement, serving as a displacement transmission medium between the probe and the sensor. Due to its high rigidity and small deformation, it can accurately transmit micron-level displacement, ensuring detection accuracy. The ruby ​​probe 306 is threaded to the bottom end of the guide rod 305 and directly contacts the lens surface to sense changes in the surface contour. Utilizing the high hardness and high smoothness of ruby, there are no scratches left upon contact, protecting the integrity of the lens surface. At the same time, it has strong wear resistance and can maintain detection stability even after long-term use, adapting to the needs of high-precision lens detection.

[0030] In the above embodiments, as a preferred solution, the support mechanism 1 includes a support base 101, a guide groove 102, and a positioning block 103. Multiple guide grooves 102 are formed on the top of the support base 101. The positioning block 103 is slidably connected to the inner wall of the guide groove 102. The support base 101 serves as the basic load-bearing component of the entire device, providing an installation reference and stable support for the height adjustment mechanism 2, contact mechanism 3, etc. Its rigid structure counteracts vibration interference during the testing process, ensuring stable operation of all moving parts and reducing testing errors caused by an unstable foundation. The guide groove 102 provides a sliding guide trajectory for the positioning block 103, limiting the movement direction of the positioning block 103, making the position adjustment of the positioning block 103 more regular and controllable, ensuring the consistency of the center reference during lens positioning. The positioning block 103 adjusts its position by sliding within the guide groove 102, clamping and positioning the lens under test from all sides, adapting to lenses of different diameters, achieving rapid lens centering and positioning, and preventing lens displacement during testing.

[0031] In the above embodiment, as a preferred solution, the support mechanism 1 further includes a fastening bolt 104. The fastening bolt 104 is threaded through the top of the positioning block 103. One end of the fastening bolt 104 protrudes from the positioning block 103 and abuts against the inner bottom wall of the guide groove 102. After the fastening bolt 104 passes through the positioning block 103 and abuts against the inner bottom wall of the guide groove 102, the adjustment position of the positioning block 103 is fixed by friction, preventing the positioning block 103 from sliding due to vibration during the detection process, ensuring the stability of lens positioning, and improving detection repeatability.

[0032] In the above embodiment, as a preferred solution, a height adjustment mechanism 2 is provided above the support mechanism 1. The height adjustment mechanism 2 includes positioning seats 201, positioning shafts 202, and threaded cylinders 203. Four positioning seats 201 are fixedly installed at the four corners of the top of the support base 101. The positioning shafts 202 are rotatably inserted into the inner wall of the positioning seats 201. The threaded cylinders 203 are fixedly installed at the top of the positioning shafts 202. By fixing the positioning seats 201 to the four corners of the support base 101, the positioning shafts 202 are provided with rotational support and axial limit, ensuring the coaxiality of the positioning shafts 202 during rotation and avoiding height discrepancies. During the adjustment process, the support plate 301 tilts, and the positioning shaft 202 is rotatably inserted into the inner wall of the positioning seat 201. Its top end is fixedly connected to the threaded cylinder 203, serving as a power transmission medium for height adjustment. It transmits the operating force to the threaded cylinder 203 through its own rotation, realizing the mechanical linkage for height adjustment. The rotation process is smooth and without jamming. The threaded cylinder 203 rotates synchronously with the positioning shaft 202, and the inner wall thread meshes with the threaded rod 205, converting the rotational motion into linear motion. By utilizing the self-locking and precision of the threaded transmission, the height of the support plate 301 can be finely adjusted, with an adjustment accuracy of less than millimeters.

[0033] In the above embodiment, as a preferred solution, the height adjustment mechanism 2 further includes a fixing block 204 and a threaded rod 205. The fixing block 204 is fixedly installed on the bottom of the support plate 301, and the threaded rod 205 is fixedly installed on the bottom of the fixing block 204. The outer surface of the threaded rod 205 is threadedly connected to the inner wall of the threaded cylinder 203. The fixing block 204 connects the bottom of the support plate 301 and the threaded rod 205, transmitting the linear movement of the threaded rod 205 to the support plate 301. The rigid connection ensures that the height adjustment force is evenly applied to the support plate 301, avoiding local deformation of the support plate 301. The threaded rod 205 meshes with the threaded cylinder 203 and moves up and down axially when the threaded cylinder 203 rotates, driving the support plate 301 to adjust its height synchronously. This adapts to lenses of different thicknesses, ensuring that the ruby ​​probe 306 can contact the lens surface with appropriate pressure, avoiding damage to the lens due to excessive pressure and preventing poor contact due to insufficient pressure.

[0034] In the above embodiments, as a preferred option, the contact mechanism 3 further includes guide holes 304. Multiple guide holes 304 are formed on the top of the pad 303. The inner wall of the guide hole 304 is slidably connected to the outer surface of the guide rod 305. The guide holes 304 formed on the top of the pad 303 provide sliding guidance for the guide rod 305, limiting the guide rod 305 to move only along the axial direction, avoiding radial offset when the guide rod 305 slides, ensuring that the displacement of the guide rod 305 completely corresponds to the concave and convex undulations of the lens surface, and improving the accuracy of displacement transmission.

[0035] In the above embodiments, as a preferred option, the detection mechanism 4 includes a slide groove 401, a slider 402, an adjusting plate 403, a grating sensor 404, and an anti-slip pad 405. The slide groove 401 is formed on the outer wall of the support plate 301. The slider 402 is slidably connected to the inner wall of the slide groove 401, and the outer surface of the slider 402 is fixedly connected to the outer wall of the adjusting plate 403. The grating sensor 404 is fixedly installed on the top of the adjusting plate 403. The anti-slip pad 405 is fixedly installed on the outer wall of the support plate 301, and its outer surface is in contact with the inner side of the adjusting plate 403. The slide groove 401, formed on the outer wall of the support plate 301, provides a sliding trajectory for the slider 402, limits the adjustment direction of the adjusting plate 403, and ensures that the relative position of the grating sensor 404 and the guide rod 305 can be accurately calibrated. The slider 402 connects the slide groove 401 and the adjusting plate 403, driving the adjusting plate 403 to slide along the slide groove 401 to adjust its position, thereby realizing the fine adjustment of the position of the grating sensor 404 and enabling it to detect... The measuring end can be precisely aligned with the top of the guide rod 305, avoiding errors caused by detection offset. The adjusting plate 403 serves as the mounting carrier for the grating sensor 404. The position of the sensor is adjusted through the cooperation of the slider 402 and the slide groove 401, providing a stable mounting platform for the grating sensor 404. The position is adjustable to adapt to the detection requirements of guide rods 305 of different specifications. The grating sensor 404 is fixed to the top of the adjusting plate 403, and detects the axial displacement of the guide rod 305 in real time and converts it into an electrical signal. Utilizing the high precision of grating detection, it accurately captures minor defects such as dents and scratches on the lens surface, and directly outputs quantitative detection data, avoiding the accuracy loss of indirect detection. The anti-slip pad 405 is fixed to the outer wall of the support plate 301 and is in close contact with the inner side of the adjusting plate 403. The friction restricts the sliding of the adjusting plate 403, preventing the adjusting plate 403 from shifting due to vibration during the detection process, ensuring the relative position stability of the grating sensor 404 and the guide rod 305, and ensuring the reliability of the detection data.

[0036] In the above embodiment, as a preferred solution, a drive mechanism 5 is provided on the support plate 301. The drive mechanism 5 includes a drive motor 501 and a drive gear 502. The drive motor 501 is fixedly installed at the bottom of the support plate 301. One end of the output end of the drive motor 501, which passes through the support plate 301, contacts the drive gear 502 through a key. The outer surface of the drive gear 502 meshes with the outer wall of the driven gear 302. The drive motor 501, fixed to the bottom of the support plate 301, provides rotational power to the drive gear 502. The rotational speed can be controlled by speed adjustment to provide a stable power source for the rotation of the driven gear 302. By adjusting the speed, it can adapt to the scanning requirements of lenses with different curvatures. The drive gear 502 is connected to the output end of the drive motor 501 through a key and meshes with the driven gear 302 to transmit power, converting the power of the drive motor 501 into the rotational motion of the driven gear 302. The gear meshing transmission is smooth and the transmission ratio is accurate, ensuring a uniform probe scanning rate and improving the consistency of the detection data.

[0037] In this invention, the working steps of the device are as follows:

[0038] 1. First, place the lens. Position the lens to be tested in the center area of ​​the top of the support 101. According to the lens diameter specification, slide the positioning block 103 along the guide groove 102 so that the positioning block 103 fits against the outer wall of the lens from all sides to achieve lens centering. Tighten the fastening bolt 104 on the top of the positioning block 103 so that the bottom end of the bolt abuts against the inner bottom wall of the guide groove 102. Fix the position of the positioning block 103 by friction to prevent the lens from shifting during testing.

[0039] 2. Adapting lens parameters, rotate the positioning shaft 202 of the height adjustment mechanism 2 to drive the top threaded cylinder 203 to rotate synchronously. The threaded cylinder 203 meshes with the threaded rod 205, causing the threaded rod 205 to drive the support plate 301 to rise and fall through the fixing block 204 until the ruby ​​probe 306 of the contact mechanism 3 lightly touches the lens surface with moderate pressure, neither scratching the lens nor losing contact. Slide the pad 303 along the middle of the driven gear 302 to adjust the radial position of the guide rod 305 and the ruby ​​probe 306, so that the probe is aligned with the radial area of ​​the lens to be inspected.

[0040] 3. Turn on the drive motor 501. The motor output drives the drive gear 502 to rotate via the key. The drive gear 502 meshes with the driven gear 302, driving the driven gear 302 to rotate around the middle of the support plate 301. When the driven gear 302 rotates, it drives the top pad 303, guide rod 305 and ruby ​​probe 306 to perform a 360° circular scan around the lens. During the scan, the unevenness of the lens surface pushes the ruby ​​probe 306 to move up and down, thereby driving the guide rod 305 to slide axially along the guide hole 304.

[0041] 4. The grating sensor 404 detects the axial displacement of the guide rod 305 in real time and converts the displacement signal into a quantized electrical signal for output, which directly reflects the quality parameters such as the flatness and smoothness of the lens surface.

[0042] 5. After the driven gear 302 completes the preset number of scans, turn off the drive motor 501, the scanning action stops, rotate the positioning shaft 202 in the opposite direction to raise the support plate 301, and the ruby ​​probe 306 disengages from the lens surface; loosen the fastening bolt 104, the sliding positioning block 103 resets, and the lens that has been inspected is taken out. Based on the displacement data output by the grating sensor 404, analyze and judge whether there are scratches, dents or other defects on the lens surface, and generate an inspection result report.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lens surface quality inspection device, characterized in that: It includes a support mechanism (1), a contact mechanism (3), and a testing mechanism (4), wherein: The contact mechanism (3) includes a support plate (301), a driven gear (302), a pad (303), a guide rod (305), and a ruby ​​probe (306). The support plate (301) is disposed above the support mechanism (1). The driven gear (302) is rotatably connected to the middle of the support plate (301). The pad (303) is slidably connected to the middle of the driven gear (302). A plurality of guide rods (305) are slidably inserted into the top of the pad (303). The ruby ​​probe (306) is threadedly connected to the bottom end of the guide rod (305). The detection mechanism (4) is located on the outside of the contact mechanism (3) and is used to detect the displacement distance of the guide rod (305).

2. The lens surface quality inspection device according to claim 1, characterized in that: The support mechanism (1) includes a support base (101), a guide groove (102) and a positioning block (103). Multiple guide grooves (102) are opened on the top of the support base (101), and the positioning block (103) is slidably connected to the inner wall of the guide groove (102).

3. The lens surface quality inspection device according to claim 2, characterized in that: The support mechanism (1) also includes a fastening bolt (104), which is threaded through the top of the positioning block (103), and one end of the fastening bolt (104) protruding from the positioning block (103) abuts against the inner bottom wall of the guide groove (102).

4. The lens surface quality inspection device according to claim 2, characterized in that: A height adjustment mechanism (2) is provided above the support mechanism (1). The height adjustment mechanism (2) includes a positioning seat (201), a positioning shaft (202), and a threaded cylinder (203). The four positioning seats (201) are fixedly installed at the four corners of the top of the support seat (101). The positioning shaft (202) is rotatably inserted into the inner wall of the positioning seat (201). The threaded cylinder (203) is fixedly installed at the top of the positioning shaft (202).

5. The lens surface quality inspection device according to claim 4, characterized in that: The height adjustment mechanism (2) further includes a fixing block (204) and a threaded rod (205). The fixing block (204) is fixedly installed on the bottom of the support plate (301), and the threaded rod (205) is fixedly installed on the bottom of the fixing block (204). The outer surface of the threaded rod (205) is threadedly connected to the inner wall of the threaded cylinder (203).

6. The lens surface quality inspection device according to claim 1, characterized in that: The contact mechanism (3) also includes guide holes (304), a plurality of guide holes (304) are opened on the top of the pad (303), and the inner wall of the guide hole (304) is slidably connected to the outer surface of the guide rod (305).

7. The lens surface quality inspection device according to claim 1, characterized in that: The detection mechanism (4) includes a slide groove (401), a slider (402), an adjusting plate (403), a grating sensor (404), and an anti-slip pad (405). The slide groove (401) is opened on the outer wall of the support plate (301). The slider (402) is slidably connected to the inner wall of the slide groove (401). The outer surface of the slider (402) is fixedly connected to the outer wall of the adjusting plate (403). The grating sensor (404) is fixedly installed on the top of the adjusting plate (403). The anti-slip pad (405) is fixedly installed on the outer wall of the support plate (301), and its outer surface is in contact with the inner side of the adjusting plate (403).

8. The lens surface quality inspection device according to claim 1, characterized in that: A drive mechanism (5) is provided on the support plate (301). The drive mechanism (5) includes a drive motor (501) and a drive gear (502). The drive motor (501) is fixedly installed on the bottom of the support plate (301). One end of the output end of the drive motor (501) passes through the support plate (301) and contacts the drive gear (502) through a key. The outer surface of the drive gear (502) meshes with the outer wall of the driven gear (302).

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