Lens module

Abstract

The utility model discloses a lens module, which comprises a first plastic lens and a first glass lens, the first plastic lens comprises a first optical part and a first assembly part surrounding the first optical part, the first assembly part comprises an image side part close to an image side, and one surface, close to an object side, of the first glass lens is a first optical surface. The surface, close to the image side, of the first glass lens is a second optical surface, and a second assembly part is connected between the first optical surface and the second optical surface; the image side part of the first plastic lens is provided with a bearing surface in surface contact with the first optical surface, so that the first plastic lens is connected with the first glass lens in an abutting manner, the lens module further comprises a metal space ring part, and the metal space ring part comprises a first supporting end part close to the object side; and the first supporting end part is matched and connected with the second assembling part to support the first glass lens. According to the utility model, there is no need to arrange a metal space ring between the first plastic lens and the first glass lens, thereby effectively reducing the installation complexity of the lens module.

Description

Technical Field

[0001] The utility model relates to the field of lenses, and in particular to a lens module. Background Art

[0002] In existing lens modules, metal spacers are usually used to support adjacent glass lenses and plastic lenses, and a lens module usually includes multiple glass lenses and multiple plastic lenses, which requires multiple metal spacers, resulting in high installation complexity and low precision of the lens module. Summary of the invention

[0003] The utility model aims to provide a lens module to solve the problem that a metal spacer is used to support a glass lens and a plastic lens in an existing lens module, which results in high installation complexity and low precision.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a lens module, comprising a first plastic lens and a first glass lens arranged in sequence along an optical path, the first plastic lens comprising a first optical part and a first assembly part surrounding the first optical part, the first assembly part comprising an object side part close to the object side and an image side part close to the image side, a surface of the first glass lens close to the object side is a first optical surface, the first optical surface extends toward the side surface of the first glass lens, a surface of the first glass lens close to the image side is a second optical surface, and a second assembly part is connected between the first optical surface and the second optical surface; a bearing surface in surface contact with the first optical surface is provided on the image side part of the first plastic lens so that the first plastic lens is abutted and connected with the first glass lens, the lens module also comprises a metal spacer part, the metal spacer part comprises a first supporting end part close to the object side, the first supporting end part is matched and connected with the second assembly part to support the first glass lens, and a gap is provided between the first supporting end part and the image side part.

[0005] Preferably, the first optical surface is a curved surface convex toward the object side, the first optical portion includes a first object side optical surface close to the object side and a first image side optical surface close to the image side, the first image side optical surface is a curved surface concave toward the object side, and the image side portion protrudes from the first image side optical surface and is arranged corresponding to the edge of the first optical surface.

[0006] Preferably, the outer surface of the image side portion includes a first surface, a second surface, the supporting surface and a third surface which are connected in sequence, the second surface faces the metal spacer portion and is provided with a gap with the metal spacer portion, the first surface is located on one side of the second surface, and the supporting surface and the third surface are located on the other side of the second surface.

[0007] Preferably, the outer surface of the image side portion is a matte surface.

[0008] Preferably, a first step portion is provided on the second assembly portion, the first supporting end portion is arranged around the first glass lens, and a second step portion engaged with the first step portion is provided on the first supporting end portion to mount the first glass lens on the metal spacer portion.

[0009] Preferably, the first optical part and the first assembly part are integrally injection molded.

[0010] Preferably, the lens module also includes a lens barrel, a second glass lens, a second plastic lens, a third plastic lens, a fourth plastic lens and a fifth plastic lens, the second glass lens, the second plastic lens, the first plastic lens, the first glass lens, the third plastic lens, the fourth plastic lens and the fifth plastic lens are arranged in sequence along the optical path and are arranged in the lens barrel, the third plastic lens includes a second optical part and a third assembly part surrounding the second optical part, the metal spacer portion also includes a second supporting end portion close to the image side, and the second supporting end portion is pressed against the third assembly portion.

[0011] Preferably, the metal spacer portion is made of copper, and an outer surface of the metal spacer portion has a black oxide layer.

[0012] Preferably, a first light shielding sheet is provided between the second plastic lens and the first plastic lens, a second light shielding sheet is provided between the third plastic lens and the fourth plastic lens, and a third light shielding sheet is provided between the fourth plastic lens and the fifth plastic lens.

[0013] Compared with the prior art, the present invention directly sets an image side portion that abuts against the first optical surface of the first glass lens on the first plastic lens, so that the first plastic lens and the first glass lens are directly abutted and connected, without the need to additionally set a metal spacer between the first plastic lens and the first glass lens, which effectively reduces the complexity of the lens module installation and effectively improves the coaxiality and parallelism of the lens module, thereby improving the yield of the lens module and reducing maintenance costs. In addition, the first plastic lens and the first glass lens in the embodiment of the present invention are in surface contact, so that the abutment between the first plastic lens and the first glass lens is more firm and more stable. Moreover, a gap is provided between the first support end and the image side portion, which can effectively avoid interference during assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the lens module of an embodiment of the utility model.

[0015] Figure 2 for Figure 1 Enlarged view of point A in the middle. DETAILED DESCRIPTION

[0016] In order to explain the technical content, structural features and effects achieved by the present invention in detail, the following is a detailed description in conjunction with the implementation modes and the accompanying drawings.

[0017] like Figure 1 to Figure 2 As shown, the embodiment of the utility model provides a lens module, including a first plastic lens 1 and a first glass lens 2 arranged in sequence along an optical path, the first plastic lens 1 includes a first optical portion 11 and a first assembly portion 12 surrounding the first optical portion 11, the first assembly portion 12 includes an object side portion 121 close to the object side and an image side portion 122 close to the image side, a surface of the first glass lens 2 close to the object side is a first optical surface 21, the first optical surface 21 extends to the side of the first glass lens 2, and a surface of the first glass lens 2 close to the image side is a second optical surface 22, a second assembly portion 23 is connected between the first optical surface 21 and the second optical surface 22; a bearing surface 1223 in contact with the first optical surface 21 is provided on the image side portion 122 of the first plastic lens 1 so that the first plastic lens 1 is abutted and connected with the first glass lens 2, and the lens module also includes a metal spacer portion 8, the metal spacer portion 8 includes a first supporting end portion 81 close to the object side, the first supporting end portion 81 is matched and connected with the second assembly portion 23 to support the first glass lens 2, and a gap 201 is provided between the first supporting end portion 81 and the image side portion 122. Specifically, the material of the first glass lens 2 is glass, the material of the first plastic lens 1 is plastic, and the first optical portion 11, the first optical surface 21 and the second optical surface 22 are all parts of the lens module for light transmission.

[0018] The embodiment of the utility model directly sets the image side portion 122 that abuts against the first optical surface 21 of the first glass lens 2 on the first plastic lens 1, so that the first plastic lens 1 and the first glass lens 2 are directly abutted and connected, without the need to additionally set a metal spacer between the first plastic lens 1 and the first glass lens 2, which effectively reduces the complexity of the lens module installation and effectively improves the coaxiality and parallelism of the lens module. The precision, thereby improving the yield of the lens module and reducing the cost of maintenance. In addition, the first plastic lens 1 and the first glass lens 2 in the embodiment of the utility model are in surface contact, so that the abutment between the first plastic lens 1 and the first glass lens 2 is more firm and more stable. Moreover, a gap 201 is provided between the first support end 81 and the image side portion 122, which can effectively avoid interference during assembly.

[0019] In the embodiment of the utility model, the first optical surface 21 is a curved surface convex toward the object side, the first optical portion 11 includes a first object side optical surface 111 close to the object side and a first image side optical surface 112 close to the image side, the first image side optical surface 112 is a curved surface concave toward the object side, and the image side portion 122 protrudes from the first image side optical surface 112 and is arranged corresponding to the edge of the first optical surface 21. Specifically, the size of the first optical surface 21 is larger than that of the first image side optical surface 112. The outer surface of the image side portion 122 includes a first surface 1221, a second surface 1222, a supporting surface 1223 and a third surface 1224 which are connected in sequence. The second surface 1222 faces the metal spacer portion 8 and has a gap 201 between the second surface 1222 and the metal spacer portion 8. The first surface 1221 is located on one side of the second surface 1222, the supporting surface 1223 and the third surface 1224 are located on the other side of the second surface 1222, and the supporting surface 1223 fits the edge of the first optical surface 21, which can not only ensure the fit between the first plastic lens 1 and the first glass lens 2, but also ensure that it does not affect the light path entering the first glass lens 2. The design is ingenious.

[0020] In the embodiment of the present invention, the outer surface of the image side portion 122 is a matte surface. Specifically, the first surface 1221, the second surface 1222, the supporting surface 1223 and the third surface 1224 are all sandblasted to form a matte surface to avoid stray light.

[0021] In the embodiment of the utility model, the second assembly portion 23 is provided with a first step portion 231, the first support end portion 81 is arranged around the first glass lens 2, and the first support end portion 81 is provided with a second step portion 811 engaged with the first step portion 231 to install the first glass lens 2 on the metal spacer portion 8. Specifically, the first glass lens 2 is installed on the metal spacer portion 8 through the first step portion 231 and the second step portion 811, which is convenient for installation.

[0022] In the embodiment of the utility model, the first optical part 11 and the first assembly part 12 are integrally injection molded. Specifically, since the first assembly part 12 is injection molded, the bearing surface 1223 is also injection molded. Injection molding has higher precision and better stability than the arc surface machined by metal spacers, and the first plastic lens 1 and the first glass lens 2 fit better.

[0023] In the embodiment of the utility model, the lens module further comprises a lens barrel 10, a second glass lens 3, a second plastic lens 4, a third plastic lens 5, a fourth plastic lens 6 and a fifth plastic lens 7. The second glass lens 3, the second plastic lens 4, the first plastic lens 1, the first glass lens 2, the third plastic lens 5, the fourth plastic lens 6 and the fifth plastic lens 7 are sequentially arranged along the optical path and arranged in the lens barrel 10. The third plastic lens 5 comprises a second optical portion 51 and a third assembly portion 52 surrounding the second optical portion 51. The metal spacer portion 8 further comprises a second supporting end portion 82 close to the image side, and the second supporting end portion 82 is pressed against the third assembly portion 52. Specifically, a first light shielding sheet 91 is arranged between the second plastic lens 4 and the first plastic lens 1, a second light shielding sheet 92 is arranged between the third plastic lens 5 and the fourth plastic lens 6, and a third light shielding sheet 93 is arranged between the fourth plastic lens 6 and the fifth plastic lens 7. Specifically, the first light shielding sheet 91, the second light shielding sheet 92 and the third light shielding sheet 93 can be light shielding Mylar.

[0024] In the embodiment of the present invention, the metal spacer portion 8 is made of copper, and the outer surface of the metal spacer portion 8 has a black oxide layer to reduce the influence of stray light.

[0025] The above disclosure is only a preferred example of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.

Claims

1. A lens module, characterized in that: The invention comprises a first plastic lens and a first glass lens which are sequentially arranged along an optical path, wherein the first plastic lens comprises a first optical portion and a first assembly portion surrounding the first optical portion, wherein the first assembly portion comprises an object side portion close to an object side and an image side portion close to an image side, wherein a surface of the first glass lens close to the object side is a first optical surface, the first optical surface extends toward a side surface of the first glass lens, a surface of the first glass lens close to the image side is a second optical surface, and a second assembly portion is connected between the first optical surface and the second optical surface; The image side portion of the first plastic lens is provided with a bearing surface in contact with the first optical surface so that the first plastic lens is abutted and connected with the first glass lens. The lens module also includes a metal spacer portion, and the metal spacer portion includes a first supporting end portion close to the object side. The first supporting end portion is cooperatively connected with the second assembly portion to support the first glass lens, and a gap is provided between the first supporting end portion and the image side portion.

2. The lens module according to claim 1, characterized in that: The first optical surface is a curved surface convex toward the object side, the first optical portion includes a first object side optical surface close to the object side and a first image side optical surface close to the image side, the first image side optical surface is a curved surface concave toward the object side, and the image side portion protrudes from the first image side optical surface and is arranged corresponding to the edge of the first optical surface.

3. The lens module according to claim 2, characterized in that: The outer surface of the image side portion includes a first surface, a second surface, the supporting surface and a third surface connected in sequence, the second surface faces the metal spacer portion and is arranged with a gap with the metal spacer portion, the first surface is located on one side of the second surface, and the supporting surface and the third surface are located on the other side of the second surface.

4. The lens module according to claim 2, characterized in that: The outer surface of the image side portion is a matte surface.

5. The lens module according to claim 1, characterized in that: The second assembly portion is provided with a first step portion, the first supporting end portion is arranged around the first glass lens, and the first supporting end portion is provided with a second step portion engaged with the first step portion so as to install the first glass lens on the metal spacer portion.

6. The lens module according to claim 1, characterized in that: The first optical part and the first assembly part are integrally injection-molded.

7. The lens module according to claim 1, characterized in that: The lens module also includes a lens barrel, a second glass lens, a second plastic lens, a third plastic lens, a fourth plastic lens and a fifth plastic lens. The second glass lens, the second plastic lens, the first plastic lens, the first glass lens, the third plastic lens, the fourth plastic lens and the fifth plastic lens are arranged in sequence along the optical path and are arranged in the lens barrel. The third plastic lens includes a second optical part and a third assembly part surrounding the second optical part. The metal spacer part also includes a second supporting end portion close to the image side, and the second supporting end portion is pressed against the third assembly part.

8. The lens module according to claim 7, characterized in that: The material of the metal spacer is copper, and the outer surface of the metal spacer has an oxidized black layer.

9. The lens module according to claim 7, characterized in that: A first light shielding sheet is disposed between the second plastic lens and the first plastic lens, a second light shielding sheet is disposed between the third plastic lens and the fourth plastic lens, and a third light shielding sheet is disposed between the fourth plastic lens and the fifth plastic lens.

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