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Optical system, lens module and electronic equipment

An optical system and lens technology, applied in optics, optical components, instruments, etc., can solve problems such as difficult to record vehicle edges, low image clarity, and low resolution

Inactive Publication Date: 2022-01-04
TIANJIN OFILM OPTO ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mainstream lenses on the market now have the problem of small angle of view. For example, it is difficult to record the edge of the vehicle while the vehicle is driving. Moreover, the resolution of similar lenses is low, and the overall clarity of the captured images is low.
That is, the existing lenses cannot meet the requirements of larger field of view and high definition at the same time

Method used

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  • Optical system, lens module and electronic equipment
  • Optical system, lens module and electronic equipment
  • Optical system, lens module and electronic equipment

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0042] Please refer to figure 1 and figure 2 , the optical system of this embodiment includes in sequence from the object side to the image side along the optical axis direction:

[0043] The first lens L1 has a negative refractive power. The object side S1 of the first lens L1 is convex at the near optical axis, and the image side S2 of the first lens L1 is concave at the near optical axis.

[0044] The second lens L2 has a negative refractive power. The object side S3 of the second lens L2 is convex at the near optical axis, and the image side S4 of the second lens L2 is concave at the near optical axis.

[0045] The third lens L3 has positive refractive power, and both the object side S5 and the image side S6 of the third lens L3 are convex at the near optical axis.

[0046] The fourth lens L4 has negative refractive power. The object side S7 of the fourth lens L4 is convex at the near optical axis, and the image side S8 of the fourth lens L4 is concave at the near optic...

no. 2 example

[0066] Please refer to image 3 and Figure 4 , the optical system of this embodiment includes in sequence from the object side to the image side along the optical axis direction:

[0067] The first lens L1 has a negative refractive power. The object side S1 of the first lens L1 is convex at the near optical axis, and the image side S2 of the first lens L1 is concave at the near optical axis.

[0068] The second lens L2 has a negative refractive power. The object side S3 of the second lens L2 is convex at the near optical axis, and the image side S4 of the second lens L2 is concave at the near optical axis.

[0069] The third lens L3 has positive refractive power, and both the object side S5 and the image side S6 of the third lens L3 are convex at the near optical axis.

[0070] The fourth lens L4 has negative refractive power. The object side S7 of the fourth lens L4 is convex at the near optical axis, and the image side S8 of the fourth lens L4 is concave at the near optic...

no. 3 example

[0082] Please refer to Figure 5 and Figure 6 , the optical system of this embodiment includes in sequence from the object side to the image side along the optical axis direction:

[0083] The first lens L1 has a negative refractive power. The object side S1 of the first lens L1 is convex at the near optical axis, and the image side S2 of the first lens L1 is concave at the near optical axis.

[0084] The second lens L2 has a negative refractive power. The object side S3 of the second lens L2 is convex at the near optical axis, and the image side S4 of the second lens L2 is concave at the near optical axis.

[0085] The third lens L3 has positive refractive power, and both the object side S5 and the image side S6 of the third lens L3 are convex at the near optical axis.

[0086] The fourth lens L4 has negative refractive power. The object side S7 of the fourth lens L4 is convex at the near optical axis, and the image side S8 of the fourth lens L4 is concave at the near opti...

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Abstract

The invention provides an optical system, a lens module and electronic equipment. The optical system sequentially comprises, from an object side to an image side along an optical axis, a first lens to a fifth lens, wherein the first lens, the second lens and the fourth lens have negative refractive power, the third lens and the fifth lens have positive refractive power, the object-side surfaces of the second lens to the fifth lens are convex in a paraxial region, the image-side surfaces of the second and fourth lenses are concave in a paraxial region, the image-side surfaces of the third and fifth lenses are convex in a paraxial region, and the optical system meets the relational expression that f1*f2 is more than 8 mm<2> and less than 11.5 mm<2>, wherein f1 is the effective focal length of the first lens, and f2 is the effective focal length of the second lens. According to the invention, by reasonably designing the surface types and the refractive power of the first lens to the fifth lens and making the optical system meet the relational expression, the optical system has high imaging resolution and enlarges the field angle range at the same time.

Description

technical field [0001] The invention belongs to the technical field of optical imaging, and in particular relates to an optical system, a lens module and electronic equipment. Background technique [0002] With the development of society, the requirements for safety and monitoring in various fields are getting higher and higher, especially in the field of transportation and vehicle monitoring. The current mainstream lenses on the market all have the problem of small angle of view. For example, it is difficult to record the edge of the vehicle while the vehicle is driving. Moreover, the resolution of similar lenses is low, and the overall clarity of the captured images is low. That is, the existing lenses cannot meet the requirements of a larger field of view and high definition at the same time. Contents of the invention [0003] The object of the present invention is to provide an optical system, a lens module and an electronic device, which can expand the field of view ...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/06G02B13/18
CPCG02B13/0045G02B13/06G02B13/18
Inventor 乐宇明兰宾利赵迪
Owner TIANJIN OFILM OPTO ELECTRONICS CO LTD
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