CN112764183A - Lens combination structure - Google Patents

Abstract

The invention discloses a lens combination structure, which comprises a first lens, a second lens, a water-blocking adhesive and an optical transparent adhesive. The first lens has a first inner surface with a first annular groove spaced from an outer edge of the first inner surface. The second lens has a second inner surface, and the second inner surface and the first inner surface are opposite to each other. The water-blocking glue is filled between the second inner surface and the first inner surface and is filled in the first annular groove. The water-blocking glue, the second inner surface and the first inner surface form a glue injection space. The optical transparent adhesive is filled in the adhesive injection space. The invention utilizes the surface tension formed by the annular groove to stop the optical transparent adhesive at the edge of the groove, or utilizes the groove to provide a space into which the optical transparent adhesive can flow when the optical transparent adhesive is excessive, thereby avoiding the overflow phenomenon.

Description

Lens combination structure

Technical Field

The present invention relates to a combination structure, and more particularly, to a lens combination structure.

Background

In some optical modules, a lens group consisting of a plurality of lenses is used, for example, two lens elements may be attached to form a lens group consisting of two lenses. Because the liquid optical cement has fluidity, the liquid optical cement has better coating performance and bubble performance compared with film-shaped optical cement which is jointed on a curved surface or jointed on the surface of an object with high and low fluctuation. Therefore, the method is applied to the current curved lens fitting technology.

When the optical cement is in a liquid state, the liquid optical cement will gradually diffuse outward during the pressing and attaching process of the lens, and if the amount of the liquid optical cement filled is too much or the design is not good, the cement will overflow the edge of the object. In order to prevent the overflow of the liquid optical adhesive at the edge of the object, the sealant is generally coated at a distance from the edge of the object to slow down or prevent the liquid optical adhesive from spreading. However, the tolerance of the object itself, the curved surface design of the object, the height difference of the sealant or the uneven downward pressure will all affect the diffusion behavior of the liquid optical adhesive, and there is still a chance to cause the occurrence of the overflow in practice. Furthermore, the method is simple. When the optical adhesive meets moisture, the adhesive can gradually react with the moisture to cause dissociation, so that the attached lens is separated. Therefore, in order to more effectively slow down the infiltration of water vapor and prolong the service life of the lens, the edge of the lens is sprayed with the water-blocking glue after the lens is attached. However, the effectiveness of the water-blocking glue will be related to its thickness and compactness. When the optical cement is too much, the thickness of the water-blocking cement is thinner, which results in that the infiltration of moisture cannot be effectively avoided.

Therefore, the present invention provides a lens assembly structure to solve the above problems.

Disclosure of Invention

The invention provides a lens combination structure, which prevents the overflow phenomenon of an optical transparent adhesive, increases the thickness of a water-blocking adhesive to stabilize the water-blocking adhesive, prevents the water-blocking adhesive from falling off, and prolongs the stroke and time required by water vapor to diffuse to the optical transparent adhesive so as to prevent the dissociation phenomenon of the optical transparent adhesive and the water vapor.

In an embodiment of the present invention, a lens assembly structure includes a first lens, a second lens, a water blocking adhesive and an optical transparent adhesive. The first lens has a first inner surface with a first annular groove spaced from an outer edge of the first inner surface. The second lens has a second inner surface, and the second inner surface and the first inner surface are opposite to each other. The water-blocking glue is filled between the second inner surface and the first inner surface and is filled in the first annular groove. The water-blocking glue, the second inner surface and the first inner surface form a glue injection space. The optical transparent adhesive is filled in the adhesive injection space.

In an embodiment of the invention, the second inner surface has a second annular groove, and the water blocking glue is filled in the second annular groove, and the second annular groove is separated from an outer edge of the second inner surface.

In an embodiment of the present invention, a distance of the second annular groove from a center position of the second inner surface is substantially smaller than a distance of the first annular groove from a center position of the first inner surface.

In an embodiment of the invention, the lens assembly further includes a sealant disposed on the first inner surface and located in the sealant injection space, and the optical transparent sealant covers the sealant.

In an embodiment of the invention, the first annular groove has a first sidewall and a second sidewall, the bottom of the first sidewall and the bottom of the second sidewall are substantially the same, the first sidewall surrounds the second sidewall, and the height of the second sidewall is substantially greater than the height of the first sidewall.

In an embodiment of the invention, a minimum width of the opening of the first annular groove is substantially greater than or equal to a height of the second sidewall.

In an embodiment of the invention, the second inner surface has a second annular groove, the water blocking glue is filled in the second annular groove, the second annular groove is separated from the outer edge of the second inner surface, the second annular groove has a third sidewall and a fourth sidewall, the third sidewall surrounds the fourth sidewall, the top of the second sidewall and the top of the fourth sidewall pass through two parallel lines, and the height of the second sidewall is substantially greater than half of the vertical distance between the two parallel lines.

In an embodiment of the invention, the height of the fourth sidewall is substantially greater than half of the vertical distance.

In an embodiment of the invention, the bottom of the third sidewall and the bottom of the fourth sidewall are substantially the same, and the height of the fourth sidewall is substantially greater than the height of the third sidewall.

In an embodiment of the invention, a minimum width of the opening of the second annular groove is substantially greater than or equal to a height of the fourth sidewall.

In an embodiment of the invention, a portion of the optically transparent adhesive is filled in the first annular groove, and the water blocking adhesive surrounds the optically transparent adhesive.

In an embodiment of the invention, a portion of the optically transparent adhesive is filled in the second annular groove, and the water blocking adhesive surrounds the optically transparent adhesive.

Based on the above, the lens assembly structure utilizes the annular groove to prevent the overflow phenomenon of the optical clear adhesive, and increases the thickness of the water blocking adhesive to stabilize the water blocking adhesive, prevent the water blocking adhesive from falling off, and prolong the travel and time required by the water vapor to diffuse to the optical clear adhesive, so as to prevent the dissociation phenomenon of the optical clear adhesive and the water vapor.

Drawings

Fig. 1 is a top view of a lens assembly structure according to a first embodiment of the invention.

Fig. 2 is a sectional view of the structure of fig. 1 taken along line a-a'.

Fig. 3 is a cross-sectional view of the first lens, the second lens and the sealant according to the first embodiment of the invention.

Fig. 4 is a sectional view showing a structure in which the optically transparent adhesive of the first embodiment of the present invention is settled at the inner edge of the first annular groove.

Fig. 5 is a cross-sectional view of the structure in which the optically transparent adhesive of the first embodiment of the present invention is stayed in the first annular groove.

Fig. 6 is a cross-sectional view of the first embodiment of the present invention showing the structure in which the optically transparent adhesive and the water blocking adhesive stay in the first annular groove.

Fig. 7 is a cross-sectional view of the first lens, the second lens, the sealant and the water-blocking sealant according to the first embodiment of the invention.

FIG. 8 is a top view of a lens array according to a second embodiment of the present invention.

Fig. 9 is a sectional view of the structure of fig. 8 taken along line B-B'.

Fig. 10 is a cross-sectional view of the first lens, the second lens and the sealant according to the second embodiment of the invention.

Fig. 11 is a sectional view illustrating a structure in which the optically transparent adhesive of the second embodiment of the present invention stays at inner edges of the first and second annular grooves.

Fig. 12 is a sectional view of a structure in which an optically transparent adhesive of the second embodiment of the present invention is stayed in the first annular groove.

FIG. 13 is a cross-sectional view of a second embodiment of the present invention showing the structure in which the optically transparent adhesive and the water blocking adhesive stay in the first annular groove and the second annular groove.

Fig. 14 is a cross-sectional view of the first lens, the second lens, the sealant and the water-blocking sealant according to the second embodiment of the invention.

Fig. 15 is a sectional view of the structure in which the optically transparent adhesive of the third embodiment of the present invention stays at the inner edges of the first and second annular grooves.

Reference numerals:

1 … lens combination structure

10 … first lens

100 … first annular groove

11 … second lens

110 … second annular groove

12 … water-blocking glue

13 … optical transparent adhesive tape

14 … sealant

Height D1 …

Height D2 …

W1 … minimum width

S … pressing space

Height D3 …

Height D4 …

W2 … minimum width

Detailed Description

Embodiments of the invention will be further explained by the following description in conjunction with the related drawings. Wherever possible, the same reference numbers will be used throughout the drawings and the description to refer to the same or like parts. In the drawings, the shape and thickness may be exaggerated for simplicity and convenience. It is to be understood that elements not specifically shown in the drawings or described in the specification are of a type well known to those of ordinary skill in the art. Many variations and modifications may be made by one of ordinary skill in the art in light of the teachings of the present invention.

When an element is referred to as being "on …," it can be directly on the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly on" another element, there are no other elements present between the two. As used herein, the term "and/or" includes any combination of one or more of the associated listed items.

Reference will now be made in detail to "one embodiment" or "an embodiment" of the present invention, which refers to a particular element, structure, or characteristic described in connection with at least one embodiment. Thus, the appearances of the phrase "one embodiment" or "an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

The disclosure has been described with respect to specific examples, which are intended to be illustrative only, since various modifications and changes in light thereof will be suggested to persons skilled in the art and are to be included within the spirit and purview of this disclosure and scope of the appended claims. Throughout the specification and claims, unless the context clearly dictates otherwise, the words "a" and "an" include the word "a" and "an" and "the" include "one or at least one" of the element or constituent. Furthermore, as used in this disclosure, the singular articles "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. Also, as used in this description and throughout the claims that follow, the meaning of "in" may include "in" and "on" unless the content clearly dictates otherwise. The term (terms) used throughout the specification and claims, unless otherwise indicated, has the ordinary meaning as commonly understood by one of ordinary skill in the art, in the context of this disclosure, and in the specific context. Certain terms used to describe the present disclosure are discussed below or elsewhere in this specification to provide additional guidance to the practitioner (practitioner) in describing the present disclosure. The use of examples anywhere throughout the specification, including any examples of words discussed herein, is intended merely to be illustrative, and certainly not to limit the scope or meaning of the disclosure or any exemplary words. Likewise, the present disclosure is not limited to the various embodiments set forth in this specification.

It is understood that as used herein, the terms "comprising," "including," "having," "containing," "including," and the like are open-ended, i.e., meaning including but not limited to. Moreover, not all objects, advantages, or features of the disclosure are necessarily to be achieved in any one embodiment or claimed herein. In addition, the abstract and the title are provided for assisting the search of patent documents and are not intended to limit the scope of the invention.

As used herein, the term "substantially", "about" or "approximately" shall mean substantially within 20%, preferably within 10%, of a given value or range. Moreover, the quantities provided herein can be approximate, meaning that the terms "about", "approximately", or "approximately" can be used unless otherwise indicated. When an amount, concentration, or other value or parameter is given a range, preferred range or table listing upper and lower desired values, it is to be understood that all ranges formed from any upper and lower pair of values or desired values is specifically disclosed, regardless of whether ranges are separately disclosed. For example, if a range of lengths from X cm to Y cm is disclosed, it should be understood that lengths of H cm are disclosed and H can be any real number between X and Y.

Fig. 1 is a top view of a lens assembly structure according to a first embodiment of the invention, fig. 2 is a cross-sectional view taken along a line a-a' of fig. 1, and fig. 3 is a cross-sectional view of a first lens, a second lens and a sealant according to the first embodiment of the invention. Referring to fig. 1, 2 and 3, alens assembly 1 according to a first embodiment of the invention is described below. Thelens assembly 1 includes afirst lens 10, asecond lens 11, a water-blockingglue 12 and an opticaltransparent glue 13. Thefirst lens 10 has a first inner surface with a firstannular groove 100, the firstannular groove 100 being spaced from the outer edge of the first inner surface. The firstannular groove 100 may be formed simultaneously with the formation of thefirst lens 10 or may be formed by subsequent processing, such as laser engraving or machine drilling. Thesecond lens 11 has a second inner surface, and the second inner surface and the first inner surface are opposite to each other. Thewater blocking glue 12 is filled between the second inner surface and the first inner surface, and is filled in the firstannular groove 100. Thewater blocking glue 12 may fill all or part of the firstannular groove 100, and the invention does not limit the space in the firstannular groove 100 filled with thewater blocking glue 12. Since the firstannular groove 100 is spaced apart from the outer edge of the first inner surface, a sufficient and stable space for filling thewater blocking glue 12 can be provided to ensure a uniform thickness of thewater blocking glue 12. In order to ensure a sufficient thickness of thewater blocking glue 12, the shortest distance between the firstannular groove 100 and the outer edge of the first inner surface may be 0.5 to 1 mm. Thewater blocking glue 12, the second inner surface of thesecond lens 11 and the first inner surface of the first lens 105 form a glue injecting space. The opticallytransparent adhesive 13 is filled in the glue injection space. Thewater blocking glue 12 is used to prevent external moisture from permeating into the opticaltransparent glue 13 and causing debonding. Thefirst lens 10 can be a curved lens or a flat lens, and thesecond lens 11 can also be a curved lens or a flat lens. When thefirst lens 10 is a curved lens, the first inner surface is a curved surface, such as a concave surface or a convex surface. When thefirst lens 10 is a flat lens, the first inner surface is flat. When thesecond lens 11 is a curved lens, the second inner surface is a curved surface, such as a concave curved surface or a convex curved surface. When thesecond lens 10 is a flat lens, the second inner surface is flat. In the first embodiment, thefirst lens 10 and thesecond lens 11 are curved lenses, wherein the first inner surface of thefirst lens 10 is a convex curved surface, and the second inner surface of thesecond lens 11 is a concave curved surface. In addition, the materials of thefirst lens 10 and thesecond lens 11 include glass, optical plastic and their mixture, but the invention is not limited thereto. Optical plastics include Polymethylmethacrylate (PMMA), Polystyrene (PS), Polycarbonate (PC), Cyclic Olefin Copolymers (COC) and Cyclic Olefin Polymers (COP) and mixtures thereof. The material of thewater blocking glue 12 includes a polymer material and a metal oxide, but the invention is not limited thereto. The polymer material includes Polyvinylidene Chloride (PVDC), ethylene vinyl alcohol copolymer (EVOH), polyvinyl nitrile (PAN), and mixtures thereof, and the metal oxide includes silica, alumina, and mixtures thereof. The optically transparent adhesive 13 may be in a liquid state or a film shape, for example, including an ultraviolet adhesive, an epoxy resin, a silicone resin, or a polyurethane, and when the opticallytransparent adhesive 13 is in a liquid state, it is a Liquid Optical Clear Adhesive (LOCA). In some embodiments of the present invention, thelens assembly structure 1 further includes asealant 14, thesealant 14 is disposed on the first inner surface of thefirst lens 10 and located in the sealant injection space, and the opticaltransparent sealant 13 covers thesealant 14. Thesealant 14 is used to prevent the optical transparent adhesive 13 from spreading. Thesealant 14 can be a liquid or film-shaped optical transparent adhesive, such as an ultraviolet adhesive, an epoxy resin, a silicone resin, or a polyurethane, but the invention is not limited thereto.

In some embodiments of the present invention, the firstannular trench 100 has a first sidewall and a second sidewall, the bottom of the first sidewall and the bottom of the second sidewall are substantially the same, the first sidewall surrounds the second sidewall, i.e., the second sidewall is located inside the first sidewall, and the height D2 of the second sidewall may 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, the press-fit distance S between thefirst lens 10 and thesecond lens 11 will be affected, and the user will not easily see the overflow of the opticallytransparent adhesive 13. To avoid this, the height D2 of the second sidewall may 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 13 at each position and can better control the amount of the water-blockingadhesive 12 during the subsequent injection of the water-blockingadhesive 12. In addition, the minimum width W1 of the opening of the firstannular trench 100 may 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, it is likely to cause the glue of the optically transparent adhesive 13 to overflow directly across the designed firstannular groove 100, and the effect of preventing the overflow of the glue is not achieved. In the first embodiment, the pressing distance S between thefirst lens 10 and thesecond lens 11 is defined as the distance between the top of the second sidewall and the position of the second inner surface of thesecond lens 11 directly above the second sidewall, and is generally 200 to 300 μm. The height D2 of the second sidewall can be designed to be substantially greater than half of the stitching spacing S, so that the firstannular groove 100 has enough space to accommodate the overflow of the opticallyclear adhesive 13.

Fig. 4 is a sectional view showing a structure in which the optically transparent adhesive of the first embodiment of the present invention is settled at the inner edge of the first annular groove. As shown in fig. 4, after the optically transparent adhesive 13 passes over thesealant 14, it will stay at the inner edge of the firstannular groove 100 due to surface tension. Fig. 5 is a sectional view illustrating a structure in which an optically transparent adhesive according to a first embodiment of the present invention is settled in a first annular groove, and fig. 6 is a sectional view illustrating a structure in which an optically transparent adhesive and a water blocking adhesive according to a first embodiment of the present invention are settled in the first annular groove. As shown in fig. 5, when the opticallytransparent adhesive 13 is excessive, a portion of the optically transparent adhesive 13 flows into the firstannular groove 100 to prevent an overflow phenomenon from occurring. That is, as shown in fig. 6, finally, a water-blockingglue 12 is injected between the edges of thefirst lens 10 and thesecond lens 11, the water-blockingglue 12 and the opticallytransparent glue 13 are filled in the firstannular groove 100 together, and the water-blockingglue 12 surrounds the opticallytransparent glue 13. Fig. 7 is a cross-sectional view of the first lens, the second lens, the sealant and the water-blocking sealant according to the first embodiment of the invention. As shown in fig. 5 and 7, the surface tension generated by the firstannular groove 100 can make the optically transparent adhesive 13 stay at the inner edge of the firstannular groove 100, so that the opticallytransparent adhesive 13 is farther away from the outer edge of the first inner surface of thefirst lens 10, and can fill the thicker water-blockingadhesive 12 than a lens without microstructures. In addition, the firstannular groove 100 can increase the length of the interface between thefirst lens 10 and thewater blocking glue 12 to extend the path and time for the moisture to diffuse into the opticaltransparent glue 13, thereby preventing the opticaltransparent glue 13 and the moisture from dissociating, and improving the weather resistance of thefirst lens 10, wherein the dotted arrows indicate the path and direction for the moisture to diffuse. In addition, the firstannular groove 100 can stabilize thewater blocking glue 12 to prevent thewater blocking glue 12 from falling off.

FIG. 8 is a top view of a lens array according to a second embodiment of the present invention. Fig. 9 is a sectional view of the structure of fig. 8 taken along line B-B'. Fig. 10 is a cross-sectional view of the first lens, the second lens and the sealant according to the second embodiment of the invention. Referring to fig. 8, 9 and 10, alens combination structure 1 according to a second embodiment of the invention is described below. The second embodiment is different from the first embodiment in that the second inner surface of thesecond lens 11 of the second embodiment has a secondannular groove 110, thewater blocking glue 12 is filled in the secondannular groove 110, and the secondannular groove 110 is away from the outer edge of the second inner surface. The water-blockingglue 12 may fill all or part of the secondannular groove 110, and the invention does not limit the space filled in the secondannular groove 110 by the water-blockingglue 12. The secondannular groove 110 can be formed simultaneously with the formation of thesecond lens 11 or can be formed by subsequent processing, such as laser engraving or machine drilling. Also, since the secondannular groove 110 is spaced apart from the outer edge of the second inner surface, it is possible to provide thewater blocking paste 12 with a sufficient and stable space for filling, so as to ensure a uniform thickness of thewater blocking paste 12. In order to ensure a sufficient thickness of thewater blocking glue 12, the shortest distance between the secondannular groove 110 and the outer edge of the second inner surface may be 0.5 to 1 mm. Since the lower edge of the optically transparent adhesive 13 runs faster and the upper edge of the optically transparent adhesive 13 runs slower when the opticallytransparent adhesive 13 is pressed by thefirst lens 10 and thesecond lens 11, the distance from the secondannular groove 110 to the center of the second inner surface can be designed to be substantially smaller than the distance from the firstannular groove 100 to the center of the first inner surface, so as to provide additional capability of preventing the optically transparent adhesive 13 from spreading, and therefore more space for filling the water-blockingadhesive 12.

In some embodiments of the present invention, the secondannular groove 110 has a third sidewall and a fourth sidewall, and the third sidewall surrounds the fourth sidewall, i.e., the fourth sidewall is located inside the third sidewall. The second sidewall of the firstannular groove 100 and the top of the fourth sidewall of the secondannular groove 110 are located through two parallel lines, and in the second embodiment, the stitching distance S between thefirst lens 10 and thesecond lens 11 is defined as the vertical distance between the two parallel lines, which is generally 200-300 μm. The height D2 of the second sidewall may be substantially greater than half of the vertical distance between the two parallel lines, i.e. half of the stitching space S, so that the firstannular groove 100 has enough space to accommodate the overflow of the opticallytransparent adhesive 13. The bottom of the third sidewall and the bottom of the fourth sidewall are substantially the same, and the height D4 of the fourth sidewall may 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, the press-fit distance S between thefirst lens 10 and thesecond lens 11 will be affected, and the user will not easily see the overflow of the opticallytransparent adhesive 13. To avoid this, the height D4 of the fourth side wall may be substantially greater than the height D3 of the third side wall, so that the user can easily observe the overflow of the optically transparent adhesive 13 at each position and can better control the amount of the water-blockingadhesive 12 during the subsequent injection of the water-blockingadhesive 12. In addition, the minimum width W2 of the opening of the secondannular groove 110 may 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, it is likely to cause the glue of the optically transparent adhesive 13 to overflow and directly cross the secondannular groove 110, and the effect of preventing the glue overflow is not achieved. The height D4 of the fourth sidewall may also be substantially greater than half of the vertical distance between two parallel lines passing through the positions of the second sidewall of the firstannular groove 100 and the top of the fourth sidewall of the secondannular groove 110, so that the secondannular groove 110 has enough space to accommodate the overflow of the opticallytransparent adhesive 13.

Fig. 11 is a sectional view illustrating a structure in which the optically transparent adhesive of the second embodiment of the present invention stays at inner edges of the first and second annular grooves. As shown in fig. 11, after the optically transparent adhesive 13 passes over thesealant 14, the optically transparent adhesive stays at the inner edges of the firstannular groove 100 and the secondannular groove 110 due to surface tension.

Fig. 12 is a sectional view of a structure in which an optically transparent adhesive of the second embodiment of the present invention is stayed in the first annular groove. As shown in fig. 12, when the amount of the opticallytransparent adhesive 13 is too much, the optically transparent adhesive can be filled in the firstannular groove 100 to avoid the overflow phenomenon.

FIG. 13 is a cross-sectional view of a second embodiment of the present invention showing the structure in which the optically transparent adhesive and the water blocking adhesive stay in the first annular groove and the second annular groove. As shown in FIG. 13, a portion of the opticallyclear adhesive 13 flows into the firstannular groove 100 and the secondannular groove 110 to avoid overflow. That is, as shown in fig. 13, finally, thewater blocking glue 12 is injected between the edges of thefirst lens 10 and thesecond lens 11, thewater blocking glue 12 and the opticallytransparent glue 13 are filled in the firstannular groove 100 and the secondannular groove 110 together, and thewater blocking glue 12 surrounds the opticallytransparent glue 13.

Fig. 14 is a cross-sectional view of the first lens, the second lens, the sealant and the water-blocking sealant according to the second embodiment of the invention. As shown in fig. 12 and 14, the surface tension generated by the firstannular groove 100 can make the optically transparent adhesive 13 stay at the inner edges of the firstannular groove 100 and the secondannular groove 110, so that the opticallytransparent adhesive 13 is farther away from the outer edge of the first inner surface of thefirst lens 10, and can be filled with thicker water-blockingadhesive 12 than a lens without microstructure. In addition, the firstannular groove 100 may increase the length of the interface between thefirst lens 10 and thewater blocking glue 12, and the secondannular groove 110 may also increase the length of the interface between thesecond lens 11 and thewater blocking glue 12, so as to prolong the path and time for the moisture to diffuse into the opticaltransparent glue 13, thereby preventing the opticaltransparent glue 13 from dissociating from the moisture, and improving the weather resistance of thefirst lens 10 and thesecond lens 11, wherein the dotted arrows indicate the path and direction for the moisture to diffuse. In addition, the firstannular groove 100 and the secondannular groove 110 can stabilize thewater blocking glue 12 to prevent thewater blocking glue 12 from falling off.

Fig. 15 is a sectional view of the structure in which the optically transparent adhesive of the third embodiment of the present invention stays at the inner edges of the first and second annular grooves. Referring to fig. 10 and 13, alens combination structure 1 according to a third embodiment of the invention is described below. The difference between the third embodiment and the second embodiment is that the second sidewall of the firstannular groove 100 and the fourth sidewall of the secondannular groove 110 of the third embodiment have a step structure to increase the strength of the surface tension, so that the overflow phenomenon of the opticallytransparent adhesive 13 is more difficult to occur.

According to the above embodiment, the lens assembly structure utilizes the annular groove to prevent the overflow phenomenon of the optical transparent adhesive, and increases the thickness of the water blocking adhesive to stabilize the water blocking adhesive, prevent the water blocking adhesive from falling off, and prolong the travel and time required for the water vapor to diffuse to the optical transparent adhesive, so as to prevent the dissociation phenomenon of the optical transparent adhesive and the water vapor.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, so that equivalent variations and modifications in the shape, structure, characteristics and spirit of the present invention as described in the claims should be included in the scope of the present invention.

Claims (12)

1. A lens array, comprising:

a first lens having a first inner surface, wherein the first inner surface has a first annular groove that is spaced apart from an outer edge of the first inner surface;

a second lens having a second inner surface, wherein the second inner surface and the first inner surface are opposite to each other;

the water-blocking glue is filled between the second inner surface and the first inner surface and is filled in the first annular groove, wherein the water-blocking glue, the second inner surface and the first inner surface form a glue injection space; and

and the optical transparent adhesive is filled in the glue injection space.

2. The lens combination of claim 1, wherein the second inner surface has a second annular groove, the water blocking glue being disposed in the second annular groove, the second annular groove being spaced from an outer edge of the second inner surface.

3. The lens array of claim 2, wherein the second annular groove is spaced less from a center location of the second inner surface than the first annular groove is spaced from a center location of the first inner surface.

4. The lens combination structure of claim 1, further comprising a sealant disposed on the first inner surface and located in the sealant injection space, wherein the optically transparent sealant covers the sealant.

5. The lens array of claim 1, wherein the first annular groove has a first sidewall and a second sidewall, the first sidewall and the second sidewall having the same bottom position, the first sidewall surrounding the second sidewall, and the second sidewall having a height greater than the first sidewall.

6. The lens array of claim 5, wherein the minimum width of the opening of the first annular groove is greater than or equal to the height of the second sidewall.

7. The lens array of claim 5, wherein the second inner surface has a second annular groove, the water blocking glue being filled in the second annular groove, the second annular groove being spaced apart from an outer edge of the second inner surface, the second annular groove having a third sidewall and a fourth sidewall, the third sidewall surrounding the fourth sidewall, a top of the second sidewall and the fourth sidewall being positioned to pass through two parallel lines, the height of the second sidewall being greater than half of a vertical distance between the two parallel lines.

8. The lens array of claim 7, wherein the height of the fourth sidewall is greater than half of the vertical distance.

9. The lens array of claim 7, wherein the third sidewall and the fourth sidewall have the same bottom position, and the height of the fourth sidewall is greater than the height of the third sidewall.

10. The lens array of claim 7, wherein the minimum width of the opening of the second annular groove is greater than or equal to the height of the fourth sidewall.

11. The lens array of claim 1, wherein a portion of the optically clear adhesive is disposed in the first annular groove, and wherein the water blocking adhesive surrounds the optically clear adhesive.

12. The lens array of claim 7, wherein a portion of the optically clear adhesive is disposed in the second annular groove, and wherein the water blocking adhesive surrounds the optically clear adhesive.

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