A fixing and turning device for double-face detection of microlenses

Abstract

This invention discloses a fixing and flipping device for double-sided inspection of microlenses, comprising a flipping platform, a flipping frame, a mounting band, a first film layer, and a second film layer. The flipping platform is a rectangular plate with a central rotating hole. The flipping frame is rotatably connected to the flipping platform through the rotating hole, and a countersunk mounting opening is located in the center of the flipping frame. The mounting band consists of an inner and outer ring, which is embedded in the mounting opening and used to tension the first film layer. The surface of the first film layer has a first adhesive layer that can cure and de-adhere under ultraviolet light irradiation below 280nm. The surface of the second film layer has a second adhesive layer that can cure under light irradiation above 400nm and is unresponsive to short-wave ultraviolet light. After inspecting the first side of the lens, the second film layer covers and cures. After flipping the mounting band, the first adhesive layer can be de-adheded and the first film layer removed, thereby achieving stable lens transfer and double-sided inspection. This invention improves the efficiency of double-sided inspection while maintaining lens position stability and surface cleanliness.

Description

Technical Field

[0001] This utility model relates to the field of microlens testing tools, and in particular to a fixing and flipping device for double-sided microlens testing. Background Technology

[0002] As precision optical components, microlenses typically require surface finish inspection on both sides to ensure imaging or focusing performance. However, most existing inspection methods are manual, involving using tweezers to hold each lens individually, inspecting one side under a microscope, and then manually flipping it over to inspect the other side. This method has significant drawbacks: firstly, the extremely small size of microlenses makes them highly susceptible to scratches, contamination, or even breakage during manual handling and flipping, resulting in low inspection yields; secondly, the efficiency of individual operation is extremely limited, making it difficult to meet the needs of batch inspection; furthermore, the lens position often shifts during manual flipping, affecting inspection accuracy and repeatability. Therefore, achieving rapid double-sided inspection of batch lenses while ensuring surface cleanliness and stable positioning has become a pressing technical problem to be solved. Utility Model Content

[0003] The technical problem solved by this invention is that manually flipping the lens to check its smoothness is too time-consuming and inefficient.

[0004] To solve the above-mentioned technical problems, the present invention provides a fixing and flipping device for double-sided detection of microlenses, comprising:

[0005] A flipping platform, wherein the flipping platform is a rectangular plate with a rotating hole in the center;

[0006] A tilting frame, which is rotatably connected to a tilting platform via a rotating hole, and has a countersunk mounting port in its middle;

[0007] An embroidery hoop is detachably fitted into the mounting opening. The embroidery hoop includes an inner ring and an outer ring that cooperate with each other for tensioning and fixing the film layer.

[0008] The first film layer is stretched on the embroidery hoop, and the surface of the first film layer is coated with a first adhesive layer. The first adhesive layer is a short-wave ultraviolet light responsive adhesive layer, which can be cured under ultraviolet light irradiation with a wavelength of less than 280nm and de-adhesive under ultraviolet light irradiation of the same wavelength band.

[0009] A second film layer can be placed on the other side of the flipping platform. The surface of the second film layer is coated with a second adhesive layer. The second adhesive layer is a long-wave ultraviolet light responsive adhesive layer, which can be cured and fixed under ultraviolet / visible light irradiation with a wavelength greater than 400nm, and does not respond to ultraviolet light with a wavelength less than 280nm.

[0010] Optionally, the flipping frame is rotatably connected to the rotating hole via a rotating shaft, and the flipping frame is provided with a notch next to the mounting opening to place the embroidery hoop in the mounting opening for removing the embroidery hoop.

[0011] Optionally, the sidewall of the mounting opening is formed into a stepped step, and the outer ring of the embroidery hoop is held in place by the inner wall of the step to ensure stable positioning.

[0012] Optionally, the inner and outer rings of the embroidery hoop are connected by a compression method to allow for quick tensioning or replacement of the first film layer.

[0013] Optionally, both the first and second film layers are transparent films, and the material is selected from PET, PC or PP film.

[0014] Optionally, the thickness of the first adhesive layer is 550 μm, and the thickness of the second adhesive layer is 550 μm.

[0015] Optionally, the first adhesive layer contains a short-wave ultraviolet photoinitiator, and the second adhesive layer contains a long-wave ultraviolet photoinitiator.

[0016] Optionally, the flipping platform is provided with placement slots on both sides for storing spare second film layers.

[0017] Optionally, the edge of the flipping frame away from the rotating hole is chamfered to facilitate gripping and flipping the flipping frame.

[0018] The beneficial effects of this utility model's technical solution are:

[0019] This invention utilizes a detachable embroidery hoop mounted on a flipping frame. A first film layer is stretched across the hoop, allowing for batch fixation and subsequent inspection of microlenses. After inspecting one side, a second film layer is applied for curing, and flipping the hoop enables rapid lens transfer from the first to the second film layer. The device employs a dual-layer adhesive structure: the first adhesive layer cures / de-cures under <280nm UV light, while the second adhesive layer cures under >400nm UV light. These wavelengths do not interfere with each other, ensuring a smooth and stable lens flipping process. This design avoids direct contact between tweezers and the lenses, significantly reducing the risk of damage and contamination, and ensuring the smoothness of the lens inspection surface, thereby greatly improving inspection efficiency and product yield. Attached Figure Description

[0020] Figure 1 This is a side view of the device in an embodiment of the present utility model;

[0021] Figure 2 This is a front view of the device in an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the device structure after removing the embroidery hoop in an embodiment of this utility model;

[0023] Figure 4 This is a schematic diagram of the embroidery hoop structure in an embodiment of the present invention;

[0024] Figure 5 This is a cross-sectional view of the embroidery hoop and the turning frame in an embodiment of this utility model;

[0025] Figure 6 This is a schematic diagram of an embroidery hoop filled with microlenses in an embodiment of this utility model. Detailed implementation method:

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0027] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] Please see Figure 1 and Figure 2 The diagram illustrates a fixing and flipping device for double-sided microlens inspection according to an embodiment. The device includes a flipping platform 1, which is a rectangular plate with a central rotating hole 11; a flipping frame 2, rotatably connected to the flipping platform 1 via the rotating hole 11, and having a countersunk mounting opening 22 in its center; and an embroidery hoop 3, detachably embedded in the mounting opening 22. The embroidery hoop 3 includes a cooperating inner ring 32 and an outer ring 31 (e.g., ...). Figure 4 As shown), a first film layer 4 is tensioned on the embroidery band 3. The surface of the first film layer 4 is coated with a first adhesive layer, which is a short-wave ultraviolet light responsive adhesive layer. It can be cured under ultraviolet light irradiation with a wavelength less than 280nm and desorbed under ultraviolet light irradiation of the same wavelength. A second film layer 5 can be placed on the other side of the flipping platform 1. The surface of the second film layer is coated with a second adhesive layer, which is a long-wave ultraviolet light responsive adhesive layer. It can be cured and fixed under ultraviolet / visible light irradiation with a wavelength greater than 400nm and does not respond to ultraviolet light less than 280nm.

[0032] After the first side of lens 100 is inspected, the second film layer 5 is applied to lens 100 and cured. Then the embroidery band 3 can be removed as a whole, flipped over and reinstalled into the mounting port 22, so that the first film layer 4 faces upward. After being debonded by short-wave ultraviolet light, it can be removed together with the embroidery band 3, thus preserving the second film layer 5 and lens 100 for subsequent inspection.

[0033] In this embodiment, the flipping frame 2 is rotatably connected to the rotating hole 11 via the rotating shaft 24, and the flipping frame 2 is provided with a notch 23 next to the mounting port 22 to prevent the embroidery hoop 3 from getting stuck in the mounting port 22, and is used to remove the embroidery hoop 3.

[0034] In this embodiment, the sidewall of the mounting opening 22 forms a stepped step (e.g., Figure 5 As shown, the outer ring of the embroidery hoop 3 is held in place by the inner wall of the step to ensure stable positioning.

[0035] In this embodiment, the inner ring 32 and the outer ring 31 of the embroidery hoop 3 are connected by a compression method so as to quickly tighten or replace the first film layer 4.

[0036] In this embodiment, both the first film layer 4 and the second film layer 5 are transparent films, and the material is selected from PET, PC or PP film.

[0037] In this embodiment, the thickness of the first adhesive layer is 550 μm, and the thickness of the second adhesive layer is 550 μm.

[0038] In this embodiment, the first adhesive layer contains a short-wave ultraviolet photoinitiator, and the second adhesive layer contains a long-wave ultraviolet photoinitiator.

[0039] In this embodiment, the flipping platform 1 is provided with placement slots 12 on both sides for storing spare second film layers 5.

[0040] In this embodiment, a chamfer 21 is provided on the edge of the flipping frame 2 away from the rotating hole 11 to facilitate gripping and flipping the flipping frame 2.

[0041] The following description will further illustrate the characteristics and functions of this utility model.

[0042] The operating method of the device in this embodiment is as follows:

[0043] When using this device for double-sided inspection of microlenses, the operator first places the embroidery hoop into the countersunk hole of the flipping frame and tensions the first film layer so that the first adhesive layer faces upward. Then, using a robotic arm or manually, the microlenses are placed one by one on the first adhesive layer, and the first adhesive layer is cured and fixed by irradiation with short-wave ultraviolet light. After the first side of the lens is inspected, the second film layer is covered on the lens, and the second adhesive layer is cured and fixed by irradiation with long-wave ultraviolet light. Then, the flipping frame is flipped to the other side of the flipping platform, the embroidery hoop is removed, flipped over, and reinstalled into the countersunk hole so that the first film layer faces upward. The first adhesive layer is debonded by irradiation with short-wave ultraviolet light, and the embroidery hoop is removed together, thus exposing the second side of the lens. Finally, the operator can remove the lens fixed on the second film layer and place it under a microscope to complete the inspection of the second side.

[0044] The device in this embodiment has the following advantages:

[0045] 1. Achieve rapid double-sided detection using microlenses:

[0046] By setting a detachable embroidery hoop on the flipping frame and utilizing the double-layer adhesive structure of the first and second film layers, the two sides of the lens can be inspected without repeatedly picking up the lens with tweezers, which greatly reduces the difficulty of manual operation and improves the inspection efficiency.

[0047] 2. Ensure lens fixation stability:

[0048] The embroidery hoop consists of an inner ring and an outer ring, which can reliably tension the first film layer, so that the first adhesive layer can stably support the microlens after curing, avoiding detection errors caused by lens slippage or positional displacement.

[0049] 3. The countersunk mounting port of the tilting frame facilitates operation:

[0050] The flip frame is equipped with countersunk holes to securely embed the embroidery hoop. It can be removed as a whole, flipped over, and reinstalled when needed, ensuring the convenience of the flipping operation. At the same time, it maintains the relative position of the lens array and prevents the lenses from becoming misaligned during the inspection process.

[0051] 4. The two layers of adhesive have distinct wavelength responses, with no interference between them:

[0052] The first adhesive layer responds to short-wavelength ultraviolet light, curing or desorbing under ultraviolet light at wavelengths <280 nm; the second adhesive layer responds to long-wavelength ultraviolet light, curing under ultraviolet / visible light at wavelengths >400 nm, and is unresponsive to short-wavelength ultraviolet light. This spectral selectivity of the two adhesive layers avoids interference during the curing and desorbing processes, enabling a smooth lens transfer from the first to the second film layer.

[0053] 5. Reduce the risk of lens surface damage:

[0054] Because the lens is temporarily fixed to the film layer with UV adhesive throughout the process, direct contact between the tweezers and the lens is avoided, which effectively reduces the risk of scratches, contamination or breakage on the lens surface and improves the yield of finished products.

[0055] 6. Ensure the lens surface is clean:

[0056] After the first adhesive layer is debonded by short-wave ultraviolet light, it can be peeled off along with the first film layer and the embroidery bandage as a whole, without leaving any residue on the lens surface, ensuring that the detection surface of the lens is clean and avoiding affecting the detection results.

[0057] 7. The device has a simple structure and is reusable.

[0058] The flipping platform is a rectangular plate. The flipping frame achieves double-sided flipping through rotating holes. The overall structure is simple and reliable. The embroidery band and film layer are replaceable and can be reused multiple times, reducing the testing cost.

[0059] 8. The detection process is highly automated and adaptable:

[0060] This device can work in conjunction with a robotic arm to enable the batch placement, flipping, and removal of microlenses, making it suitable for use in automated inspection systems and further improving inspection efficiency and consistency.

[0061] 9. Wide range of applications:

[0062] This device is not only suitable for double-sided inspection of ultra-small lenses, but can also be extended to the surface inspection of other tiny optical elements or microstructure components, demonstrating strong versatility.

[0063] In summary, this invention enables the batch fixing and inspection of microlenses by setting a detachable embroidery hoop on the flipping frame and tensioning a first film layer on the embroidery hoop. After inspecting one side, a second film layer is applied for curing, and then the embroidery hoop is flipped to achieve rapid transfer of the lens from the first film layer to the second film layer. The device adopts a double-layer adhesive structure. The first adhesive layer is cured / de-cured under <280nm ultraviolet light, and the second adhesive layer is cured under >400nm ultraviolet light. The wavelengths do not interfere with each other, ensuring a smooth and stable lens flipping process. This design avoids direct contact between tweezers and the lens, significantly reducing the risk of damage and contamination, and ensuring the smoothness of the lens inspection surface, greatly improving inspection efficiency and product yield.

[0064] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fixing and flipping device for double-sided inspection of microlenses, characterized in that, include: A flipping platform, wherein the flipping platform is a rectangular plate with a rotating hole in the center; A tilting frame, which is rotatably connected to a tilting platform via a rotating hole, and has a countersunk mounting port in its middle; An embroidery hoop is detachably fitted into the mounting opening. The embroidery hoop includes an inner ring and an outer ring that cooperate with each other for tensioning and fixing the film layer. The first film layer is stretched on the embroidery hoop, and the surface of the first film layer is coated with a first adhesive layer. The first adhesive layer is a short-wave ultraviolet light responsive adhesive layer, which can be cured under ultraviolet light irradiation with a wavelength of less than 280nm and de-adhesive under ultraviolet light irradiation of the same wavelength band. A second film layer can be placed on the other side of the flipping platform. The surface of the second film layer is coated with a second adhesive layer. The second adhesive layer is a long-wave ultraviolet light responsive adhesive layer, which can be cured and fixed under ultraviolet / visible light irradiation with a wavelength greater than 400nm, and does not respond to ultraviolet light with a wavelength less than 280nm.

2. The apparatus according to claim 1, characterized in that, The flipping frame is rotatably connected to the rotating hole via a rotating shaft, and the flipping frame has a notch next to the mounting opening to place the embroidery hoop in the mounting opening for removal of the embroidery hoop.

3. The apparatus according to claim 2, characterized in that, The sidewall of the mounting opening forms a stepped step, and the outer ring of the embroidery hoop is held in place by the inner wall of the step to ensure stable positioning.

4. The apparatus according to claim 3, characterized in that, The inner and outer rings of the embroidery hoop are connected by a compression method to allow for quick tensioning or replacement of the first film layer.

5. The apparatus according to claim 4, characterized in that, Both the first and second film layers are transparent films, and the material is selected from PET, PC or PP film.

6. The apparatus according to claim 5, characterized in that, The thickness of the first adhesive layer is 550 μm, and the thickness of the second adhesive layer is 550 μm.

7. The apparatus according to claim 6, characterized in that, The first adhesive layer contains a short-wave ultraviolet photoinitiator, and the second adhesive layer contains a long-wave ultraviolet photoinitiator.

8. The apparatus according to claim 7, characterized in that, The flipping platform is provided with placement slots on both sides for storing spare second film layers.

9. The apparatus according to claim 8, characterized in that, The edge of the flipping frame away from the rotating hole is chamfered to facilitate gripping and flipping the frame.

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