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Optical system, lens module and electronic equipment

An optical system and lens technology, applied in the direction of optics, optical components, instruments, etc., can solve the problem of controlling the axial thickness of the lens group within a suitable range

Pending Publication Date: 2020-05-12
JIANGXI JINGCHAO OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the past seven-piece optical system, due to the large number of lenses, it was difficult to control the axial thickness of the lens group within an appropriate range

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

[0061] Please refer to Figure 1a with Figure 1b , the optical system of this embodiment, from the object side to the image side along the optical axis direction includes:

[0062] The first lens L1 has positive refractive power, and the object side S1 of the near optical axis area and the near circumference area of ​​the first lens L1 is convex; the image side S2 of the near optical axis area of ​​the first lens L1 is concave, and the image side S2 of the near circumference area of ​​the first lens L1 is concave. S2 is convex;

[0063] The second lens L2 has a negative refractive power, the object side S3 of the near optical axis area and the near circumference area of ​​the second lens L2 is a convex surface, and the image side S4 of the near optical axis area and the near circumference area of ​​the second lens L2 is a concave surface;

[0064] The third lens L3 has a positive refractive power, the object side S5 of the near optical axis region of the third lens L3 is a c...

no. 2 example

[0084] Please refer to Figure 2a with Figure 2b , the optical system of this embodiment, from the object side to the image side along the optical axis direction includes:

[0085] The first lens L1 has positive refractive power, and the object side S1 of the near optical axis area and the near circumference area of ​​the first lens L1 is convex; the image side S2 of the near optical axis area of ​​the first lens L1 is concave, and the image side S2 of the near circumference area of ​​the first lens L1 is concave. S2 is convex;

[0086] The second lens L2 has a negative refractive power, the object side S3 of the near optical axis area and the near circumference area of ​​the second lens L2 is a convex surface, and the image side S4 of the near optical axis area and the near circumference area of ​​the second lens L2 is a concave surface;

[0087] The third lens L3 has a positive refractive power, and the object side surface S5 of the third lens L3 near the optical axis are...

no. 3 example

[0103] Please refer to Figure 3a with Figure 3b, the optical system of this embodiment, from the object side to the image side along the optical axis direction includes:

[0104] The first lens L1 has positive refractive power, and the object side S1 of the near optical axis area and the near circumference area of ​​the first lens L1 is convex; the image side S2 of the near optical axis area of ​​the first lens L1 is concave, and the image side S2 of the near circumference area of ​​the first lens L1 is concave. S2 is convex;

[0105] The second lens L2 has a negative refractive power, the object side S3 of the near optical axis area and the near circumference area of ​​the second lens L2 is a convex surface, and the image side S4 of the near optical axis area and the near circumference area of ​​the second lens L2 is a concave surface;

[0106] The third lens L3 has a positive refractive power, the object side S5 of the near optical axis region of the third lens L3 is a c...

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Abstract

The invention provides an optical system, a lens module and electronic equipment. The optical system sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens that are arranged from the object side to the image side along the optical axis direction. The first lens has the positive refraction power; the object side of the first lens is a convex surface; and the image side close to the optical axis areas is a concave surface. The third lens has the positive refraction power; the object side of the third lens is a convex surface. The object side surface and the image side surface, close to the circumferential area, of the fifth lens are convex surfaces; the seventh lens has the negative refractive power, the object side, close to the optical axis area, of the seventh lens is a convex surface and the image side, close to the optical axis area, of the seventh lens is a concave surface; and at least one surface in the object side and the image side of the fifth lens and the seventh lens is provide with at least one inflection point. Therefore, distortion, astigmatism and spherical aberration generated by the front lensgroup are balanced, and improvement of resolution is facilitated; and meanwhile, multiple inflection points are arranged, so that the bending degree of the lens is reduced, the axial thickness of thelens is reduced, and the size is reduced.

Description

technical field [0001] The invention belongs to the field of optical imaging, and in particular relates to an optical system, a lens module with the optical system and electronic equipment. Background technique [0002] With the development of science and technology and the popularity of smart phones and smart electronic devices, devices with diverse camera functions are widely favored by people. The optical system is the main core component of a device with diverse camera functions. The resolution of the optical system directly affects the shooting effect of the device, and the size of the optical system determines the size of the device. [0003] In the past seven-element optical system, due to the large number of lenses, it was difficult to control the axial thickness of the lens group within an appropriate range. Therefore, under the premise of ensuring the high resolution of the seven-chip optical system, reducing the axial thickness of the optical system has become th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/18
CPCG02B13/0015G02B13/0045
Inventor 党绪文刘彬彬李明邹海荣
Owner JIANGXI JINGCHAO OPTICAL CO LTD