Method for manufacturing a lens assembly

Abstract

The present application discloses a method for manufacturing a lens assembly. First, a first curved lens with a convex surface is provided, and a first optical transparent adhesive is formed in the center of the convex surface. Then, a second curved lens with a concave surface is provided, and a second optical transparent adhesive is formed in the center of the concave surface. The first curved lens and the second curved lens are aligned so that the convex surface and the concave surface face each other, and the first optical transparent adhesive and the second optical transparent adhesive contact and soak each other. Finally, the first curved lens and the second curved lens are pressed together by the first optical transparent adhesive and the second optical transparent adhesive to form an optical transparent adhesive layer between the first curved lens and the second curved lens. The optical transparent adhesive in the center of the curved surface soaks each other to avoid air bubbles.

Description

Technical Field

[0001] This invention relates to a method for manufacturing a composite structure, and more particularly to a method for manufacturing a lens composite structure. Background Technology

[0002] In some optical modules, lens assemblies consisting of multiple lenses are used. For example, two lenses can be bonded together to form a lens assembly. Liquid optical adhesives, due to their fluidity, offer better encapsulation and bubble control compared to film-based optical adhesives when bonding to curved surfaces or objects with uneven surfaces. Therefore, they are currently used in curved lens bonding technology.

[0003] In the process of bonding curved products in the atmosphere, the old process typically uses upper and lower robotic arms to pick up the upper and lower curved products respectively. After the dispensing valve applies adhesive to the lower curved product, the upper robotic arm moves the upper curved product for alignment. After alignment, the robotic arm directly presses down on the upper curved product, and the adhesive is diffused and filled into the product through the compression of the upper and lower curved products. Because the adhesive tends to form a concave surface when the dispensing valve applies adhesive to the lower curved product, air bubbles can easily be trapped in the adhesive when the robotic arm directly presses down on the upper curved product. When air bubbles are generated, moisture can seep into them, causing the adhesive to gradually react with the moisture and dissociate, thus causing the upper and lower curved products to separate.

[0004] Therefore, in order to address the aforementioned problems, the present invention proposes a method for manufacturing a lens assembly structure to solve the problems arising from conventional methods. Summary of the Invention

[0005] This invention provides a method for manufacturing a lens assembly structure that avoids air bubbles being drawn in due to differences in lens surface cleanliness and curvature.

[0006] In one embodiment of the present invention, a method for manufacturing a lens assembly structure includes the following steps: providing a first curved lens having a convex surface, and forming a first optically transparent adhesive at the center of the convex surface; providing a second curved lens having a concave surface, and forming a second optically transparent adhesive at the center of the concave surface; aligning the first curved lens and the second curved lens with the convex and concave surfaces facing each other, and contacting and wetting each other with the first and second optically transparent adhesives; and pressing the first curved lens and the second curved lens together with the first and second optically transparent adhesives to form an optically transparent adhesive layer between the first curved lens and the second curved lens.

[0007] In one embodiment of the present invention, the first curved lens and the second curved lens are pressed together at speeds of less than 0.1 mm / s and greater than 0 mm / s.

[0008] In one embodiment of the present invention, the viscosity and amount of the first optically transparent adhesive and the second optically transparent adhesive are the same.

[0009] In one embodiment of the present invention, the viscosity of the first optically transparent adhesive is 5600-5500 centipoise-seconds (cps).

[0010] In one embodiment of the present invention, the amount of the first optically transparent adhesive is 0.06-1.3 ml.

[0011] In one embodiment of the present invention, a frame adhesive surrounding the first optically transparent adhesive is provided on the convex curved surface of the first curved lens, and the optically transparent adhesive layer covers the frame adhesive.

[0012] In one embodiment of the present invention, the method for manufacturing the lens assembly structure further includes the step of forming a water-blocking adhesive between the convex and concave surfaces and surrounding the optically transparent adhesive layer.

[0013] In one embodiment of the present invention, the convex surface has a first annular groove, which is separate from the outer edge of the convex surface.

[0014] In one embodiment of the present invention, a portion of the optically transparent adhesive layer is filled in the first annular groove.

[0015] In one embodiment of the present invention, the concave surface has a second annular groove, which is separate from the outer edge of the concave surface.

[0016] Based on the above, the manufacturing method of the lens assembly structure utilizes optically transparent adhesive located in the center of the curved surface to mutually wet each other, so as to avoid air bubbles being drawn in due to differences in the cleanliness and curvature of the lens surface. Attached Figure Description

[0017] Figures 1(a) to 1(e) This is a schematic diagram of the steps in a method for manufacturing a lens assembly structure according to an embodiment of the present invention.

[0018] Figure 2 This is a top view of the lens assembly structure according to the first embodiment of the present invention.

[0019] Figure 3 for Figure 2 A structural cross-sectional view along line A-A'.

[0020] Figure 4 This is a cross-sectional view of the first curved lens, the second curved lens, and the frame adhesive according to the first embodiment of the present invention.

[0021] Figure 5 This is a cross-sectional view of the structure of the optically transparent adhesive layer remaining at the inner edge of the first annular groove, according to the first embodiment of the present invention.

[0022] Figure 6 This is a cross-sectional view of the structure of the optically transparent adhesive layer remaining in the first annular groove according to the first embodiment of the present invention.

[0023] Figure 7 This is a cross-sectional view of the structure of the optically transparent adhesive layer and the water-blocking adhesive remaining in the first annular groove according to the first embodiment of the present invention.

[0024] Figure 8 This is a cross-sectional view of the first curved lens, the second curved lens, the frame adhesive, and the water-resistant adhesive according to the first embodiment of the present invention.

[0025] Figure 9 This is a top view of the lens assembly structure according to the second embodiment of the present invention.

[0026] Figure 10 for Figure 9 A structural cross-sectional view along line B-B'.

[0027] Figure 11 This is a cross-sectional view of the first curved lens, the second curved lens, and the frame adhesive according to the second embodiment of the present invention.

[0028] Figure 12 This is a cross-sectional view of the structure of the optically transparent adhesive layer remaining at the inner edges of the first and second annular grooves, according to a second embodiment of the present invention.

[0029] Figure 13 This is a cross-sectional view of the structure of the optically transparent adhesive layer remaining in the first annular groove according to the second embodiment of the present invention.

[0030] Figure 14 This is a cross-sectional view of the structure of the optically transparent adhesive layer and the water-blocking adhesive in the first annular groove and the second annular groove, according to the second embodiment of the present invention.

[0031] Figure 15 This is a cross-sectional view of the first curved lens, the second curved lens, the frame adhesive, and the water-resistant adhesive according to the second embodiment of the present invention.

[0032] Figure 16 This is a cross-sectional view of the structure of the optically transparent adhesive layer remaining at the inner edges of the first and second annular grooves, according to the third embodiment of the present invention.

[0033] Figure reference numerals: 1… Lens assembly structure

[0034] 10…First Curved Lens

[0035] 100…First annular groove

[0036] 11…Second Curved Lens

[0037] 110…Second annular groove

[0038] 12… Water-resistant adhesive

[0039] 13…Optically transparent adhesive layer

[0040] 130…First Optical Transparent Adhesive

[0041] 131…Second optical transparent adhesive

[0042] 14… Frame glue

[0043] 20…First robotic arm

[0044] 21…Second robotic arm

[0045] 30…First Glue Valve

[0046] 31…Second Glue Valve

[0047] D1…Height

[0048] D2…height

[0049] W1…Minimum width

[0050] S…pressing gap

[0051] D3…height

[0052] D4…Height

[0053] W2…minimum width Detailed Implementation

[0054] Embodiments of the present invention will be further explained below with reference to the accompanying drawings. Wherever possible, the same reference numerals represent the same or similar components in the drawings and description. In the drawings, shapes and thicknesses may be exaggerated for simplicity and convenience. It is understood that components not specifically shown in the drawings or described in the description are forms known to those skilled in the art. Those skilled in the art can make various changes and modifications based on the content of this invention.

[0055] When a component is said to be "on" another component, it can mean that the component is directly on another component, or that another component exists between the two. Conversely, when a component is said to be "directly on" another component, it cannot mean that another component exists between the two. As used herein, the term "and / or" includes any combination of one or more of the listed related items.

[0056] In the following description of "one embodiment" or "an embodiment," the term refers to a specific component, structure, or feature associated with at least one embodiment. Therefore, the multiple descriptions of "one embodiment" or "an embodiment" appearing in various places below do not refer to the same embodiment. Furthermore, specific components, structures, and features in one or more embodiments may be combined in a suitable manner.

[0057] The disclosure is specifically described with reference to the following examples, which are merely illustrative. Various modifications and refinements can be made by those skilled in the art without departing from the spirit and scope of this disclosure. Therefore, the scope of protection of this disclosure shall be determined by the appended claims. Throughout the specification and claims, unless explicitly stated otherwise, the words “a” and “the” include statements containing “a or at least one” of the component or ingredient. Furthermore, as used in this disclosure, the singular article also includes statements of multiple components or ingredients unless clearly excluded from the specific context. Moreover, when applied in this description and throughout the claims below, unless explicitly stated otherwise, “in which” may include both “in which” and “on which”. The terms used throughout the specification and claims, unless otherwise specified, generally have their ordinary meaning in the context of this disclosure and in specific contexts. Certain terms used to describe this disclosure will be discussed below or elsewhere in this specification to provide additional guidance to practitioners in describing this disclosure. Examples throughout this specification, including examples of any terms discussed herein, are for illustrative purposes only and do not limit the scope or meaning of this disclosure or any illustrative terms. Similarly, this disclosure is not limited to the various embodiments set forth in this specification.

[0058] It is understood that the terms "comprising," "including," "having," "containing," "involving," etc., used herein are open-ended, meaning including but not limited to. Furthermore, no embodiment of the invention or the scope of any claim is required to achieve all the objects, advantages, or features disclosed in the invention. In addition, the abstract and headings are merely for assisting in patent document searches and are not intended to limit the scope of the claims.

[0059] The terms "substantially," "around," "about," or "approximately" as used herein should generally mean within 20%, preferably within 10%, of a given value or range. Furthermore, quantities provided herein may be approximate, thus meaning that unless otherwise stated, the terms "about," "approximately," or "approximately" may be used. When a quantity, concentration, or other numerical value or parameter has a specified range, preferred range, or lists upper and lower ideal values, it should be considered as specifically disclosing all ranges consisting of any pairs of upper and lower limits or ideal values, whether such ranges are disclosed individually or not. For example, if a range of length X cm to Y cm is disclosed, it should be considered as disclosing a length of H cm, where H can be any real number between X and Y.

[0060] The following describes a method for manufacturing a lens assembly structure, which utilizes optically transparent adhesive located in the center of a curved surface to mutually wet each other, in order to avoid air bubbles being drawn in due to differences in the cleanliness and curvature of the lens surfaces.

[0061] Figures 1(a) to 1(e) This is a schematic diagram illustrating the steps of a method for fabricating a lens assembly structure according to an embodiment of the present invention. Please refer to [link / reference]. Figures 1(a) to 1(e)The following describes the method for manufacturing the lens assembly structure according to the present invention. First, as shown in Figure 1(a), a first robotic arm 20 provides a first curved lens 10 with a convex surface, and a first adhesive valve 30 forms a first optically transparent adhesive 130 at the center of the convex surface, wherein the first optically transparent adhesive 130 deviates from the center of the convex surface by no more than 1 mm. A second robotic arm 21 provides a second curved lens 11 with a concave surface, and a second adhesive valve 31 forms a second optically transparent adhesive 131 at the center of the concave surface, wherein the second optically transparent adhesive 131 deviates from the center of the concave surface by no more than 1 mm. In some embodiments, a frame adhesive 14 surrounding the first optically transparent adhesive 130 may be provided on the convex surface of the first curved lens 10. To avoid the risk of dripping, the amount of the first optically transparent adhesive 130 and the second optically transparent adhesive 131 should not be too large. The viscosity and amount of the first optically transparent adhesive 130 and the second optically transparent adhesive 131 can be the same. For example, the viscosity of the first optically transparent adhesive 130 can be, but is not limited to, 5600-5500 centipoise-seconds (cps), and the amount of the first optically transparent adhesive 130 can be, but is not limited to, 0.06-1.3 ml. Due to gravity, the first optically transparent adhesive 130 will be convex, and the second optically transparent adhesive 131 will be concave. Next, as shown in Figures 1(b) and 1(c), the first robotic arm 20 and the second robotic arm 21 are used to move the first curved lens 10 and the second curved lens 11 respectively, to align the first curved lens 10 and the second curved lens 11, so that the convex and concave curved surfaces face each other, and the first optically transparent adhesive 130 and the second optically transparent adhesive 131 come into contact with and permeate each other. As shown in Figure 1(d), a first robotic arm 20 and a second robotic arm 21 are used to press a first curved lens 10 and a second curved lens 11 together using a first optically transparent adhesive 130 and a second optically transparent adhesive 131. This forms an optically transparent adhesive layer 13 between the first curved lens 10 and the second curved lens 11, covering the frame adhesive 14. The first curved lens 10, the second curved lens 11, and the optically transparent adhesive layer 13 form a lens assembly structure 1. When the first optically transparent adhesive 130 and the second optically transparent adhesive 131 come into contact, the pressing speed should be slowed down. The first curved lens 10 and the second curved lens 11 can be pressed at speeds less than 0.1 mm / s and greater than 0 mm / s. During pressing, the convex first optically transparent adhesive 130 and the concave second optically transparent adhesive 131 easily diffuse from point to surface, thus avoiding air bubbles from being drawn in due to differences in the cleanliness and curvature of the lens surfaces. In some embodiments, as shown in FIG1(e), a water-blocking adhesive 12 may also be formed between the convex and concave surfaces and surround the optically transparent adhesive layer 13, so as to form a lens assembly structure 1 using the water-blocking adhesive 12, the first curved lens 10, the second curved lens 11, and the optically transparent adhesive layer 13. These steps do not necessarily need to be followed if substantially the same result can be obtained. Figures 1(a) to 1(e) The execution will proceed in the order shown.

[0062] To prevent the optically transparent adhesive layer 13 from overflowing, the convex and concave surfaces may also have annular grooves, which are described below.

[0063] Figure 2 This is a top view of the lens assembly structure according to the first embodiment of the present invention. Figure 3 for Figure 2 A structural sectional view along line A-A'. Figure 4 This is a cross-sectional view of the first curved lens, the second curved lens, and the frame adhesive according to a first embodiment of the present invention. Please refer to [link / reference]. Figure 2 , Figure 3 and Figure 4The following describes the lens assembly structure 1 according to the first embodiment of the present invention. The lens assembly structure 1 includes a first curved lens 10, a second curved lens 11, a water-blocking adhesive 12, and an optically transparent adhesive layer 13. The first curved lens 10 has a convex surface with a first annular groove 100, which is separated from the outer edge of the convex surface. The first annular groove 100 can be formed simultaneously with the formation of the first curved lens 10, or it can be fabricated using subsequent processing methods, such as laser engraving or machine drilling. The second curved lens 11 has a concave surface, which is opposite to the convex surface. The water-blocking adhesive 12 is filled between the convex and concave surfaces and within the first annular groove 100. The water-blocking adhesive 12 can fill all or part of the first annular groove 100; the present invention does not limit the space in which the water-blocking adhesive 12 is filled within the first annular groove 100. Because the first annular groove 100 is separated from the outer edge of the convex surface, it provides sufficient and stable space for the water-blocking adhesive 12 to be filled, ensuring that the water-blocking adhesive 12 has a uniform thickness. To ensure that the water-blocking adhesive 12 has sufficient thickness, the shortest distance between the first annular groove 100 and the outer edge of the convex surface can be 0.5 to 1 mm. The water-blocking adhesive 12, the concave surface of the second curved lens 11, and the convex surface of the first curved lens 105 form an injection space. The optically transparent adhesive layer 13 is filled in this injection space. The water-blocking adhesive 12 is used to prevent external moisture from penetrating and reacting with the optically transparent adhesive layer 13, causing delamination. The materials of the first curved lens 10 and the second curved lens 11 include glass, optical plastics, and mixtures thereof, but the present invention is not limited thereto. Optical plastics include polymethyl methacrylate (PMMA), polystyrene (PS), polycarbonate (PC), cyclic olefin copolymers (COC), and cyclic olefin polymers (COP), and mixtures thereof. The water-blocking adhesive 12 is made of polymeric materials and metal oxides, but this invention is not limited thereto. Polymeric materials include polyvinylidene chloride (PVDC), ethylene vinyl alcohol copolymer (EVOH), polyacrylonitrile (PAN), and mixtures thereof. Metal oxides include silicon dioxide, aluminum oxide, and mixtures thereof. The optically clear adhesive layer 13 can be liquid or film-like, for example, including ultraviolet adhesive, epoxy resin, silicone resin, or polyurethane. When the optically clear adhesive layer 13 is liquid, it is called liquid optical clear adhesive (LOCA). In some embodiments of this invention, the lens assembly structure 1 may further include a frame adhesive 14, which is disposed on the convex surface of the first curved lens 10 and located in the adhesive injection space. The optically clear adhesive layer 13 covers the frame adhesive 14. The frame adhesive 14 is used to prevent the diffusion of the optically clear adhesive layer 13.The frame adhesive 14 can be a liquid or film-like optically transparent adhesive, such as ultraviolet adhesive, epoxy resin, silicone resin or polyurethane, but the present invention is not limited thereto.

[0064] In some embodiments of the present invention, the first annular groove 100 has a first sidewall and a second sidewall, the bottoms of the first sidewall and the second sidewall are substantially at the same position, the first sidewall surrounds the second sidewall, that is, the second sidewall is located inside the first sidewall, and the height D2 of the second sidewall can be substantially greater than the height D1 of the first sidewall. If the height D1 of the first sidewall is greater than or equal to the height D2 of the second sidewall, it will affect the bonding gap S between the first curved lens 10 and the second curved lens 11, and the user will not easily see the overflow of the optically transparent adhesive layer 13. To avoid this situation, the height D2 of the second sidewall can be designed to be substantially greater than the height D1 of the first sidewall, so that the user can easily observe the overflow of the optically transparent adhesive layer 13 at various positions, and can better control the amount of water-resistant adhesive 12 when injecting it later. In addition, the minimum width W1 of the opening of the first annular groove 100 can be substantially greater than or equal to the height D2 of the second sidewall. This is because when the minimum width W1 of the opening is very small, the optically transparent adhesive layer 13 may overflow directly across the designed first annular groove 100, thus failing to prevent overflow. In the first embodiment, the bonding distance S between the first curved lens 10 and the second curved lens 11 is defined as the distance between the top of the second sidewall and the concave surface of the second curved lens 11 directly above it, typically 200–300 micrometers. The height D2 of the second sidewall can be designed to be substantially greater than half the bonding distance S, so that the first annular groove 100 has sufficient space to accommodate the overflow of the optically transparent adhesive layer 13.

[0065] Figure 5 This is a cross-sectional view of the structure of the optically transparent adhesive layer remaining at the inner edge of the first annular groove, according to a first embodiment of the present invention. Figure 5 As shown, when the optically transparent adhesive layer 13 passes over the frame adhesive 14, it will remain at the inner edge of the first annular groove 100 due to surface tension. Figure 6 This is a cross-sectional view of the structure of the optically transparent adhesive layer remaining in the first annular groove according to the first embodiment of the present invention. Figure 7 This is a cross-sectional view of the structure of the optically transparent adhesive layer and the water-blocking adhesive remaining in the first annular groove according to the first embodiment of the present invention. Figure 6 As shown, when there is too much optically transparent adhesive layer 13, a portion of the optically transparent adhesive layer 13 flows into the first annular groove 100 to avoid overflow. That is, as... Figure 7As shown, water-blocking adhesive 12 is finally injected between the edges of the first curved lens 10 and the second curved lens 11. The water-blocking adhesive 12 and the optically transparent adhesive layer 13 are filled together in the first annular groove 100, and the water-blocking adhesive 12 surrounds the optically transparent adhesive layer 13. Figure 8 This is a cross-sectional view of the first curved lens, the second curved lens, the frame adhesive, and the water-resistant adhesive according to the first embodiment of the present invention. Figure 6 and Figure 8 As shown, the surface tension generated by the first annular groove 100 allows the optically transparent adhesive layer 13 to remain at the inner edge of the first annular groove 100. Therefore, the optically transparent adhesive layer 13 is farther from the outer edge of the convex surface of the first curved lens 10, allowing for a thicker layer of water-blocking adhesive 12 compared to a lens without microstructures. Furthermore, the first annular groove 100 increases the length of the interface between the first curved lens 10 and the water-blocking adhesive 12, extending the path and time for moisture to diffuse to the optically transparent adhesive layer 13, thereby preventing the optically transparent adhesive layer 13 from dissociating from the moisture and improving the weather resistance of the first curved lens 10. The dashed arrows indicate the path and direction of moisture diffusion. Additionally, the first annular groove 100 can stabilize the water-blocking adhesive 12 to prevent it from detaching.

[0066] Figure 9 This is a top view of the lens assembly structure according to the second embodiment of the present invention. Figure 10 for Figure 9 A structural cross-sectional view along line B-B'. Figure 11 This is a cross-sectional view of the first curved lens, the second curved lens, and the frame adhesive according to a second embodiment of the present invention. Please refer to [link / reference]. Figure 9 , Figure 10 and Figure 11The following describes the lens assembly structure 1 according to the second embodiment of the present invention. The difference between the second embodiment and the first embodiment is that the concave surface of the second curved lens 11 in the second embodiment has a second annular groove 110, and water-blocking adhesive 12 is filled in the second annular groove 110. The second annular groove 110 is separate from the outer edge of the concave surface. The water-blocking adhesive 12 can fill all or part of the second annular groove 110; the present invention does not limit the space in which the water-blocking adhesive 12 is filled in the second annular groove 110. The second annular groove 110 can be formed simultaneously with the formation of the second curved lens 11, or it can be fabricated by subsequent processing methods, such as laser engraving or machine drilling. Similarly, since the second annular groove 110 is separate from the outer edge of the concave surface, it provides sufficient and stable space for the water-blocking adhesive 12 to fill, ensuring that the water-blocking adhesive 12 has a uniform thickness. To ensure that the water-blocking adhesive 12 has sufficient thickness, the shortest distance between the second annular groove 110 and the outer edge of the concave surface can be 0.5 to 1 mm. Because when the optically transparent adhesive layer 13 is pressed together by the first curved lens 10 and the second curved lens 11, the lower edge of the optically transparent adhesive layer 13 moves faster and the upper edge moves slower, the distance between the second annular groove 110 and the center of the concave surface can be designed to be substantially smaller than the distance between the first annular groove 100 and the center of the convex surface, so as to provide additional ability to prevent the optically transparent adhesive layer 13 from spreading, and thus there will be more space to fill the water-blocking adhesive 12.

[0067] In some embodiments of the invention, the second annular groove 110 has a third sidewall and a fourth sidewall, the third sidewall surrounding the fourth sidewall, i.e., the fourth sidewall is located inside the third sidewall. The top positions of the second sidewall of the first annular groove 100 and the fourth sidewall of the second annular groove 110 pass through two parallel lines. In a second embodiment, the bonding distance S between the first curved lens 10 and the second curved lens 11 is defined as the vertical distance between these two parallel lines, typically 200-300 micrometers. The height D2 of the second sidewall can be substantially greater than half of the vertical distance between these two parallel lines, i.e., half of the bonding distance S, so that the first annular groove 100 has sufficient space to accommodate the overflow of the optically transparent adhesive layer 13. The bottom positions of the third sidewall and the fourth sidewall are substantially the same, and the height D4 of the fourth sidewall can be substantially greater than the height D3 of the third sidewall. If the height D3 of the third sidewall is greater than or equal to the height D4 of the fourth sidewall, it will affect the bonding distance S between the first curved lens 10 and the second curved lens 11, and the user will also find it difficult to see the overflow of the optically transparent adhesive layer 13. To avoid this, the height D4 of the fourth sidewall can be designed to be substantially greater than the height D3 of the third sidewall, allowing the user to easily observe the overflow of the optically transparent adhesive layer 13 at various locations, and to better control the amount of water-resistant adhesive 12 when it is subsequently injected. In addition, the minimum width W2 of the opening of the second annular groove 110 can be substantially greater than or equal to the height D4 of the fourth sidewall. This is because when the minimum width W2 of the opening is very small, the overflow of the optically transparent adhesive layer 13 may directly cross the designed second annular groove 110, thus failing to achieve the effect of preventing overflow. The height D4 of the fourth sidewall can also be substantially greater than half the vertical distance between two parallel lines passing through the top of the second sidewall of the first annular groove 100 and the fourth sidewall of the second annular groove 110, so that the second annular groove 110 has enough space to accommodate the overflow of the optically transparent adhesive layer 13.

[0068] Figure 12 This is a cross-sectional view of the structure of the optically transparent adhesive layer remaining at the inner edges of the first and second annular grooves, according to a second embodiment of the present invention. Figure 12 As shown, when the optically transparent adhesive layer 13 passes over the frame adhesive 14, it will remain at the inner edge of the first annular groove 100 and the second annular groove 110 due to surface tension.

[0069] Figure 13 This is a cross-sectional view of the structure of the optically transparent adhesive layer remaining in the first annular groove according to the second embodiment of the present invention. Figure 13 As shown, when there is too much optically transparent adhesive layer 13, it can be filled into the first annular groove 100 to avoid overflow.

[0070] Figure 14This is a cross-sectional view of the structure of the second embodiment of the present invention, showing the optically transparent adhesive layer and the water-blocking adhesive remaining in the first annular groove and the second annular groove. Figure 14 As shown, a portion of the optically transparent adhesive layer 13 flows into the first annular groove 100 and the second annular groove 110 to prevent overflow. That is, as... Figure 14 As shown, water-blocking adhesive 12 is finally injected between the edges of the first curved lens 10 and the second curved lens 11. The water-blocking adhesive 12 and the optically transparent adhesive layer 13 are filled together in the first annular groove 100 and the second annular groove 110, and the water-blocking adhesive 12 surrounds the optically transparent adhesive layer 13.

[0071] Figure 15 This is a cross-sectional view of the first curved lens, the second curved lens, the frame adhesive, and the water-resistant adhesive according to the second embodiment of the present invention. Figure 13 and Figure 15 As shown, the surface tension generated by the first annular groove 100 allows the optically transparent adhesive layer 13 to remain at the inner edges of the first annular groove 100 and the second annular groove 110. Therefore, the optically transparent adhesive layer 13 is farther from the outer edge of the convex surface of the first curved lens 10, allowing for a thicker water-blocking adhesive 12 compared to a lens without microstructure. Furthermore, the first annular groove 100 increases the length of the interface between the first curved lens 10 and the water-blocking adhesive 12, and the second annular groove 110 also increases the length of the interface between the second curved lens 11 and the water-blocking adhesive 12, thereby extending the path and time for moisture to diffuse to the optically transparent adhesive layer 13. This prevents the optically transparent adhesive layer 13 from dissociating from the moisture and improves the weather resistance of the first curved lens 10 and the second curved lens 11. The dashed arrows indicate the path and direction of moisture diffusion. Additionally, the first annular groove 100 and the second annular groove 110 can stabilize the water-blocking adhesive 12 to prevent it from detaching.

[0072] Figure 16 This is a cross-sectional view of the structure of the optically transparent adhesive layer remaining at the inner edges of the first and second annular grooves, according to a third embodiment of the present invention. Please refer to... Figure 11 and Figure 16 The lens assembly structure 1 of the third embodiment of the present invention is described below. The difference between the third embodiment and the second embodiment is that the second sidewall of the first annular groove 100 and the fourth sidewall of the second annular groove 110 in the third embodiment also have a stepped structure to enhance the strength of surface tension and make it more difficult for the optically transparent adhesive layer 13 to overflow.

[0073] According to the above embodiments, the manufacturing method of the lens assembly structure utilizes optically transparent adhesive located in the center of the curved surface to mutually wet each other, so as to avoid air bubbles being drawn in due to differences in the cleanliness and curvature of the lens surface.

[0074] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Therefore, all equivalent variations and modifications made in accordance with the shape, structure, features and spirit described in the claims of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A method for manufacturing a lens assembly structure, characterized in that: Includes the following steps: A first curved lens with a convex surface is provided, and a convex first optically transparent adhesive is formed at the center of the convex surface; A second curved lens with a concave surface is provided, and a concave second optically transparent adhesive is formed at the center of the concave surface, wherein the concave surface extends from the center of the second curved lens to the edge of the second curved lens; The first curved lens and the second curved lens are aligned so that the convex curved surface and the concave curved surface are opposite each other, and the first optical transparent adhesive and the second optical transparent adhesive are in contact with and wetted by each other. as well as The first curved lens and the second curved lens are bonded together by the first optically transparent adhesive and the second optically transparent adhesive to form an optically transparent adhesive layer between the first curved lens and the second curved lens.

2. The method for manufacturing the lens assembly structure as described in claim 1, characterized in that: The first curved lens and the second curved lens are pressed together at speeds of less than 0.1 mm / s and greater than 0 mm / s.

3. The method for manufacturing the lens assembly structure as described in claim 1, characterized in that: The first optically transparent adhesive and the second optically transparent adhesive have the same viscosity and amount.

4. The method for manufacturing the lens assembly structure as described in claim 3, characterized in that: The viscosity of the first optically transparent adhesive is 5500-5600 centipoise.

5. The method for manufacturing the lens assembly structure as described in claim 3, characterized in that: The amount of the first optically transparent adhesive is 0.06-1.3 ml.

6. The method for manufacturing the lens assembly structure as described in claim 1, characterized in that: The first curved lens has a frame adhesive surrounding the first optically transparent adhesive on its convex curved surface, and the optically transparent adhesive layer covers the frame adhesive.

7. The method for manufacturing the lens assembly structure as described in claim 1, characterized in that: It also includes the step of forming a water-resistant adhesive between the convex surface and the concave surface, and surrounding the optically transparent adhesive layer.

8. The method for manufacturing the lens assembly structure as described in claim 1, characterized in that: The convex surface has a first annular groove, which is separate from the outer edge of the convex surface.

9. The method for manufacturing the lens assembly structure as described in claim 8, characterized in that: Part of the optically transparent adhesive layer is filled in the first annular groove.

10. The method for manufacturing the lens assembly structure as described in claim 1, characterized in that: The concave surface has a second annular groove, which is separate from the outer edge of the concave surface.

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