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 unsatisfactory imaging quality, restrictions on lens thinning, and limited light input

Inactive Publication Date: 2021-02-09
JIANGXI JINGCHAO OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most macro imaging lenses use small-area photosensitive chips and an aperture number exceeding 2.2. The shooting range is small and the amount of light entering is limited, resulting in unsatisfactory imaging quality. In order to obtain high image quality, the total length of the lens will be increased, which restricts the lens. Thinning

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

[0047] Please refer to Figure 1a and Figure 1b , the optical system of this embodiment includes in sequence from the object side to the image side along the optical axis direction:

[0048] The first lens L1 has a positive refractive power, the object side S1 near the optical axis area and the near circumference area of ​​the first lens L1 are both convex, and the image side S2 of the first lens L1 is concave near the optical axis area and the near circumference area;

[0049] The second lens L2 has a refractive power, the object side S3 near the optical axis area and the near circumference area of ​​the second lens L2 are both convex, and the image side S4 of the second lens L2 is concave near the optical axis area and the near circumference area;

[0050] The third lens L3 has a refractive power, the object side S5 of the third lens L3 is convex in the near optical axis area, and the near circumference area is concave, and the image side S6 of the third lens L3 is both con...

no. 2 example

[0068] Please refer to Figure 2a and Figure 2b , the optical system of this embodiment includes in sequence from the object side to the image side along the optical axis direction:

[0069] The first lens L1 has a positive refractive power, the object side S1 near the optical axis area and the near circumference area of ​​the first lens L1 are both convex, and the image side S2 of the first lens L1 is concave near the optical axis area and the near circumference area;

[0070] The second lens L2 has refractive power, the object side S3 near the optical axis area and the near circumference area of ​​the second lens L2 are both convex, the image side S4 of the second lens L2 is concave near the optical axis area, and the near circumference area is convex;

[0071] The third lens L3 has refractive power. The object side S5 of the third lens L3 is convex in the area near the optical axis, and the area near the circumference is concave. The image side S6 of the third lens L3 is ...

no. 3 example

[0085] Please refer to Figure 3a and Figure 3b , the optical system of this embodiment includes in sequence from the object side to the image side along the optical axis direction:

[0086] The first lens L1 has a positive refractive power, the object side S1 near the optical axis area and the near circumference area of ​​the first lens L1 are convex, and the image side S2 of the first lens L1 is concave near the optical axis area and the near circumference area;

[0087] The second lens L2 has a refractive power. The object side S3 of the second lens L2 has a convex surface near the optical axis area, and the near circumference area is concave. The image side S4 of the second lens L2 has a concave near optical axis area, and the near circumference area is uniform is convex;

[0088] The third lens L3 has a refractive power. The object side S5 of the third lens L3 is convex in the area near the optical axis, and the area near the circumference is concave. The image side S6...

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Abstract

The invention discloses an optical system, a lens module and electronic equipment. The optical system includes, in order from an object side to an image side along an optical axis direction, first tofifth lenses having refractive power, wherein the first and fourth lenses have positive refractive power, and the fifth lens has negative refractive power; object side surfaces of the first to fourthlenses and an image side surface paraxial region of the fourth lens are convex surfaces, and image side surface paraxial regions of the first to third lenses are concave surfaces; the object side surface and the image side surface of the fifth lens are aspheric surfaces, at least one of the object side surface and the image side surface of the fifth lens is provided with at least one inflection point, and the optical system satisfies the conditional expression: 0.2</=IMGH/OBJH</=0.8. By arranging the five-piece lens structure, the refractive power of the five optical lenses and the surface type of the paraxial region are reasonably configured, and the optical system meets the relational expression, so that the optical system has a wider imaging range and higher magnification, and is easy to miniaturize.

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] By reducing the shooting distance, the macro imaging lens allows tiny objects to form a magnified image on the image surface, highlighting the details that are difficult for the human eye to capture. This makes the macro imaging lens more and more important in multi-camera electronic devices. At present, most macro imaging lenses use small-area photosensitive chips and an aperture number exceeding 2.2. The shooting range is small and the amount of light entering is limited, resulting in unsatisfactory imaging quality. In order to obtain high image quality, the total length of the lens will be increased, which restricts the lens. Thin and light. Contents of the invention [0003] The object of the present invention is to provide an optical system, lens module and electro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/18G02B13/24
CPCG02B13/0045G02B13/18G02B13/24
Inventor 党绪文刘彬彬李明邹海荣
Owner JIANGXI JINGCHAO OPTICAL CO LTD
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