Optical lens structure and lens module

Abstract

The utility model belongs to the technical field of optical products, and particularly relates to an optical lens structure and a lens module. The optical lens structure comprises a first semi-cylinder and a second semi-cylinder which are made of light-transmitting materials, the first semi-cylinder and the second semi-cylinder are attached together to form a columnar lens body, the two end portions of the columnar lens body are a light-in side and a light-out side respectively, an inner cavity is formed in the columnar lens body, and the columnar lens body is divided into at least two lenses arranged between the light-in side and the light-out side by the inner cavity; the lens module comprises a lens cone and an optical lens structure fixedly installed on the lens cone, and lens fastening glue is arranged between the optical lens structure and the lens cone. During installation, the optical lens structure is directly installed on the lens barrel, and no assembly error is generated between the at least two lenses of the optical lens structure, so that the problem that the optical performance and the yield of optical products are affected due to the fact that the assembly error is easily generated when the lenses of the existing lens module are assembled is solved.

Description

Technical Field

[0001] This utility model belongs to the field of optical product technology, and in particular relates to an optical lens structure and lens module. Background Technology

[0002] Currently, lens modules are an important component of optical products such as cameras, AR devices, VR devices, and projection devices. Lens modules use multiple lenses to achieve light path transmission. Due to the large number of lenses and the limited installation space, assembly is not only very difficult, but also prone to assembly errors such as eccentricity and tilt, which affect light path transmission and thus reduce the optical performance of the lens module and the yield of optical products. Utility Model Content

[0003] The purpose of this invention is to provide an optical lens structure and lens module, which aims to solve the problem that assembly errors are easily generated during the assembly of existing lens modules, thus affecting optical performance and the yield of optical products.

[0004] This utility model discloses an optical lens structure, which includes a first semi-cylinder and a second semi-cylinder made of light-transmitting material. The side plane of the first semi-cylinder and the side plane of the second semi-cylinder are attached together to form a cylindrical lens body. The two ends of the cylindrical lens body are the light-incident side and the light-exit side, respectively. An inner cavity is provided inside the cylindrical lens body, which divides the cylindrical lens body into at least two lenses disposed between the light-incident side and the light-exit side.

[0005] As an improvement, recesses are provided at the side plane of the first half-cylinder and the side plane of the second half-cylinder, respectively. The inner cavity is formed by the connection between the cavity opening of the first half-cylinder and the cavity opening of the second half-cylinder.

[0006] As an improvement, the side plane of the first half-cylinder is bonded and fixed to the side plane of the second half-cylinder, and a cleaning hole communicating with the inner cavity is provided between the first half-cylinder and the second half-cylinder.

[0007] As an improvement, the cleaning holes are provided on opposite sides of the inner cavity.

[0008] As an improvement, the structure of the first half-cylinder is the same as that of the second half-cylinder, and the shape of the cavity in the first half-cylinder is the same as that in the second half-cylinder. A connecting groove communicating with the cavity is provided on the side plane of one side of the cavity, and the connecting groove and the side plane of the mating side form the adhesive hole.

[0009] As an improvement, the inner cavity is provided with at least two spaced apart along the axial direction of the cylindrical mirror body.

[0010] As an improvement, when the outer diameter of the inner cavity is smaller than the outer diameter of the adjacent inner cavity, the cleaning hole includes a large-diameter hole portion located away from the inner cavity and a small-diameter hole portion communicating between the large-diameter hole portion and the inner cavity.

[0011] As an improvement, the first and second semi-cylinders are integral structures formed by 3D printing or machining, and the inner cavity sides corresponding to the light-incident and light-exit sides are set as concave, convex, or flat surfaces; or, the first and second semi-cylinders are integral structures formed by injection molding, and the inner cavity sides corresponding to the light-incident and light-exit sides are respectively set as concave surfaces.

[0012] This utility model also discloses a lens module, which includes a lens barrel and an optical lens structure as described in claim 1, which is fixedly installed on the lens barrel, and a lens fastening adhesive is provided between the optical lens structure and the lens barrel.

[0013] As an improvement, a retaining ring is provided on the inner ring side of the port at one end of the lens barrel, the optical lens structure is disposed inside the lens barrel and abuts against the retaining ring, and the lens fastening adhesive is disposed between the side of the optical lens structure away from the retaining ring and the corresponding part of the lens barrel; or, the optical lens structure is disposed outside the lens barrel and inserted into the port at one end of the lens barrel, the lens fastening adhesive is disposed at the port of the lens barrel, and a light-shielding layer is provided on the outer peripheral side of the optical lens structure.

[0014] The beneficial effects achieved by adopting the above technical solution are as follows:

[0015] The optical lens structure of this invention includes a first semi-cylinder and a second semi-cylinder made of light-transmitting material. The side planes of the first semi-cylinder and the second semi-cylinder are bonded together to form a cylindrical lens body. The two ends of the cylindrical lens body are the light-incident side and the light-exit side, respectively. An inner cavity is provided inside the cylindrical lens body, which divides the cylindrical lens body into at least two lenses disposed between the light-incident side and the light-exit side. The lens module of this invention includes a lens barrel and an optical lens structure fixedly installed on the lens barrel. Lens fastening adhesive is provided between the optical lens structure and the lens barrel.

[0016] Since the optical lens structure is a cylindrical lens body formed by bonding the first half-cylinder and the second half-cylinder together, and has at least two lenses, the relative positions between the at least two lenses remain fixed after the first half-cylinder and the second half-cylinder are bonded together. During installation, the optical lens structure is directly installed into the lens barrel. There will be no assembly error between the at least two lenses of the optical lens structure, which can improve optical performance and optical product yield. This solves the problem that assembly errors are easy to occur during the lens assembly of existing lens modules, which affect optical performance and optical product yield. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the optical lens structure of this utility model;

[0018] Figure 2 This is an exploded structural diagram of the optical lens structure of this utility model;

[0019] Figure 3 This is a cross-sectional structural diagram of the optical lens structure of this utility model;

[0020] Figure 4 This is a three-dimensional structural diagram of the lens module according to the first embodiment of this utility model;

[0021] Figure 5 This is a cross-sectional view of the lens module according to the first embodiment of this utility model;

[0022] Figure 6 This is a three-dimensional structural diagram of the lens module according to the second embodiment of the present invention;

[0023] Figure 7 This is a cross-sectional view of the lens module according to the second embodiment of the present invention;

[0024] Among them, 10a, first semi-cylinder; 10b, second semi-cylinder; 11, concave cavity; 12, cleaning adhesive hole; 131, wide groove; 132, narrow groove; 14, straight groove; 21, first inner cavity; 22, second inner cavity; 30, lens barrel; 31, retaining ring; 40, lens fastening adhesive; 50, end lens; 60, end fastening adhesive; 70, spacer ring. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0026] Figures 1 to 7 This is a schematic diagram of the optical lens structure and lens module of this utility model, wherein, Figure 1 A three-dimensional structural diagram of the optical lens structure of this utility model is shown. Figure 2 An exploded view of the optical lens structure of this invention is shown. Figure 3 A cross-sectional view of the optical lens structure of this invention is shown. Figure 4 This diagram shows a three-dimensional structural schematic of the lens module according to the first embodiment of the present invention. Figure 5 This diagram shows a cross-sectional view of the lens module according to the first embodiment of the present invention. Figure 6 A three-dimensional structural schematic diagram of the lens module according to the second embodiment of this utility model is shown. Figure 7 A cross-sectional view of the lens module according to a second embodiment of the present invention is shown. For ease of description, only the parts relevant to the present invention are shown in the figure.

[0027] It should be noted that if the present invention involves directional indicators (such as up, down, front, back, etc.), the directional indicators are only used to explain the relative positional relationship between the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly. If the present invention involves descriptions such as "first", "second", etc., the descriptions such as "first", "second", etc. are only used for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly indicating the number of technical features indicated.

[0028] Depend on Figure 1 , Figure 2 and Figure 3 As can be seen, the optical lens structure of this utility model includes a first semi-cylinder 10a and a second semi-cylinder 10b made of light-transmitting material. The side plane of the first semi-cylinder 10a and the side plane of the second semi-cylinder 10b are attached together to form a cylindrical lens body. The two ends of the cylindrical lens body are the light-incident side and the light-exit side, respectively. An inner cavity is provided inside the cylindrical lens body, which divides the cylindrical lens body into at least two lenses disposed between the light-incident side and the light-exit side.

[0029] Since the optical lens structure is a cylindrical lens body formed by bonding the first half-cylinder and the second half-cylinder together, and has at least two lenses, the relative positions between the at least two lenses remain fixed after the first half-cylinder and the second half-cylinder are bonded together. During installation, the optical lens structure is directly installed into the lens barrel. There will be no assembly error between the at least two lenses of the optical lens structure, which can improve optical performance and optical product yield. This solves the problem that assembly errors are easy to occur during the lens assembly of existing lens modules, which affect optical performance and optical product yield.

[0030] In this utility model, recesses 11 are provided at the side plane of the first semi-cylinder 10a and the side plane of the second semi-cylinder 10b, respectively. The cavity openings of the recesses 11 in the first semi-cylinder 10a and the cavity openings of the recesses 11 in the second semi-cylinder 10b are connected to form an inner cavity.

[0031] Specifically, the side plane of the first semi-cylinder 10a is bonded and fixed to the side plane of the second semi-cylinder 10b, and a cleaning hole 12 communicating with the inner cavity is provided between the first semi-cylinder 10a and the second semi-cylinder 10b. During bonding, excess glue is generated at the joint between the side plane of the first semi-cylinder 10a and the side plane of the second semi-cylinder 10b. Excess glue will affect the optical path transmission. Cleaning fluid (such as water, solvent, etc.) is introduced into the inner cavity through the cleaning hole 12 to clean the excess glue. In order to enhance the cleaning effect, cleaning holes 12 are provided on opposite sides of the inner cavity. The cleaning fluid flows in from the cleaning hole 12 on one side and flows out from the cleaning hole 12 on the other side.

[0032] Typically, at least two internal cavities are spaced apart along the axial direction of the cylindrical lens body, which can divide the cylindrical lens body into at least three lenses arranged in sequence.

[0033] In practical applications, since the outer diameters of at least two inner cavities may differ, in order to avoid the setting of the cleaning hole 12 affecting the transmission of light, when the outer diameter of the inner cavity is smaller than that of the adjacent inner cavity, the cleaning hole 12 is configured as follows: a large-diameter hole portion is provided away from the inner cavity, and a small-diameter hole portion is connected between the large-diameter hole portion and the inner cavity, which can avoid affecting the peripheral side of the concave surface of the inner cavity.

[0034] As shown in Figure 3, there are two inner cavities spaced apart, namely a first inner cavity 21 and a second inner cavity 22, wherein the outer diameter of the first inner cavity 21 is smaller than the outer diameter of the second inner cavity 22.

[0035] In this utility model, the structure of the first half-cylinder 10a is the same as that of the second half-cylinder 10b, and the shape of the cavity provided in the first half-cylinder 10a is the same as that provided in the second half-cylinder 10b.

[0036] For ease of manufacturing, the first semi-cylinder 10a and the second semi-cylinder 10b are injection-molded one-piece structures. To facilitate demolding, the sides of the inner cavity corresponding to the light-incident and light-exit sides are respectively set as concave surfaces. Of course, the first semi-cylinder 10a and the second semi-cylinder 10b can also be 3D-printed one-piece structures or machined one-piece structures. In this case, the sides of the inner cavity corresponding to the light-incident and light-exit sides can be set as concave, convex, or flat surfaces.

[0037] Specifically, a connecting groove communicating with the cavity is provided on the side plane of one side of the cavity, and the connecting groove and the side plane of the mating side form a glue-removing hole 12.

[0038] Correspondingly, for the inner cavity with a small outer diameter, the connecting groove is configured as follows: a wide groove 131 located away from the concave cavity, and a narrow groove 132 connecting the wide groove 131 and the concave cavity. The narrow groove 132 forms a small-diameter hole, and the wide groove 131 forms a large-diameter hole, which can reduce the influence of the narrow groove 132 on the groove surface of the recess. For the inner cavity with a large outer diameter, the connecting groove is provided with a straight groove 14.

[0039] In this invention, the cylindrical mirror body is configured as a cylindrical structure, but it can also be configured as a quadrangular prism structure.

[0040] Specifically, the end face of the cylindrical mirror on the light-incident side and the end face on the light-outcident side can be set as concave or convex.

[0041] This utility model also relates to a lens module, which includes a lens barrel 30 and the aforementioned optical lens structure fixedly installed on the lens barrel 30. A lens fastening adhesive 40 is provided between the optical lens structure and the lens barrel 30 to enhance the fixed connection performance between the optical lens structure and the lens barrel 30, and at the same time, it can also block light between the optical lens structure and the lens barrel 30.

[0042] During installation, the optical lens structure is installed as a whole on the lens barrel 30. There will be no assembly error between at least two lenses of the optical lens structure, which can improve optical performance and optical product yield. This solves the problem that assembly errors are easy to occur during the assembly of existing lens modules, which affect optical performance and optical product yield.

[0043] in, Figure 4 and Figure 5 The specific structure of the lens module of the first embodiment of the present invention is shown. A retaining ring 31 is provided on the inner ring side of the port at one end of the lens barrel 30. The optical lens structure is disposed inside the lens barrel 30 and abuts against the retaining ring 31. The lens fastening adhesive 40 is disposed between the side of the optical lens structure away from the retaining ring 31 and the corresponding part of the lens barrel 30. Since the optical lens structure is disposed inside the lens barrel 30, the barrel wall of the lens barrel 30 can block the light of the optical lens structure.

[0044] Figure 6 and Figure 7The specific structure of the lens module according to the second embodiment of the present invention is shown. The optical lens structure is disposed outside the lens barrel 30 and inserted into the port at one end of the lens barrel 30. The lens fastening adhesive 40 is disposed between the port of the lens barrel 30 and the corresponding side of the optical lens structure. The lens fastening adhesive 40 can enhance the fixed connection performance between the first port of the lens barrel 30 and the optical lens structure. At the same time, it can also enhance the sealing performance between the port of the lens barrel 30 and the optical lens structure. A light-shielding layer is provided on the outer periphery of the optical lens structure, which can block the entire optical lens structure and prevent external light from affecting the light path transmission of the optical lens structure. Usually, the light-shielding layer is a black ink layer applied or sprayed on the outer periphery of the optical lens structure. Of course, it can also be an adhesive layer made of opaque material.

[0045] Specifically, the lens module also includes an end lens 50 spaced apart from one end of the optical lens structure. When the optical lens structure is located inside the lens barrel 30, the end lens 50 is fixed to the port of the lens barrel 30 away from the optical lens structure, and an end fastening adhesive 60 is provided between the end lens 50 and the port of the corresponding side of the lens barrel 30. When the optical lens structure is located outside the lens barrel 30, a retaining ring 31 is provided on the inner ring side of the port of the lens barrel 30 away from the optical lens structure, the end lens 50 is located inside the lens barrel 30 and abuts against the retaining ring 31, and a spacer ring 70 is provided between the end lens 50 and the optical lens structure. This facilitates installation and prevents contact between the end lens 50 and the optical lens structure.

[0046] In some other embodiments, a middle transmission lens is provided between the end lens 50 and the optical lens structure, which is not shown in the figure.

[0047] The above description is only some embodiments of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An optical lens structure, characterized in that, It includes a first semi-cylinder and a second semi-cylinder made of light-transmitting material. The side planes of the first semi-cylinder and the side planes of the second semi-cylinder are attached together to form a cylindrical lens body. The two ends of the cylindrical lens body are the light-incident side and the light-exit side, respectively. An inner cavity is provided inside the cylindrical lens body, and the inner cavity divides the cylindrical lens body into at least two lenses disposed between the light-incident side and the light-exit side.

2. The optical lens structure according to claim 1, characterized in that, A cavity is provided on the side plane of the first half-cylinder and the side plane of the second half-cylinder respectively. The cavity opening of the cavity in the first half-cylinder and the cavity opening of the cavity in the second half-cylinder are connected to form the inner cavity.

3. The optical lens structure according to claim 2, characterized in that, The side plane of the first half-cylinder is bonded and fixed to the side plane of the second half-cylinder, and a cleaning hole communicating with the inner cavity is provided between the first half-cylinder and the second half-cylinder.

4. The optical lens structure according to claim 3, characterized in that, The cleaning holes are respectively provided on both sides of the inner cavity.

5. The optical lens structure according to claim 3, characterized in that, The structure of the first half-cylinder is the same as that of the second half-cylinder. The shape of the cavity in the first half-cylinder is the same as that in the second half-cylinder. A connecting groove communicating with the cavity is provided on the side plane of one side of the cavity. The connecting groove and the side plane of the mating side form the adhesive hole.

6. The optical lens structure according to any one of claims 3 to 5, characterized in that, The inner cavity is provided with at least two spaced apart along the axial direction of the cylindrical mirror body.

7. The optical lens structure according to claim 6, characterized in that, When the outer diameter of the inner cavity is smaller than the outer diameter of the adjacent inner cavity, the cleaning hole includes a large-diameter hole portion located away from the inner cavity and a small-diameter hole portion connecting the large-diameter hole portion and the inner cavity.

8. The optical lens structure according to claim 1, characterized in that, The first and second semi-cylinders are integral structures formed by 3D printing or machining, and the inner cavity sides corresponding to the light-incident and light-exit sides are set as concave, convex, or flat surfaces; or, the first and second semi-cylinders are integral structures formed by injection molding, and the inner cavity sides corresponding to the light-incident and light-exit sides are respectively set as concave surfaces.

9. A lens module, comprising a lens barrel, characterized in that, It also includes an optical lens structure as described in any one of claims 1 to 8, which is fixedly installed on the lens barrel, and a lens fastening adhesive is provided between the optical lens structure and the lens barrel.

10. The lens module according to claim 9, characterized in that, A retaining ring is provided on the inner ring side of the port at one end of the lens barrel. The optical lens structure is disposed inside the lens barrel and abuts against the retaining ring. The lens fastening adhesive is disposed between the side of the optical lens structure away from the retaining ring and the corresponding part of the lens barrel. Alternatively, the optical lens structure is disposed outside the lens barrel and inserted into the port at one end of the lens barrel. The lens fastening adhesive is disposed at the port of the lens barrel. A light-shielding layer is provided on the outer peripheral side of the optical lens structure.

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