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Optical system, camera module and electronic equipment

A technology of optical system and optical axis, applied in the direction of optics, optical components, instruments, etc.

Pending Publication Date: 2021-10-19
JIANGXI JINGCHAO OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on this, it is necessary to provide an optical system, a camera module and an electronic device for how to better realize a large viewing angle.

Method used

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

Examples

Experimental program
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Effect test

no. 1 example

[0097] refer to figure 1 , in the first embodiment, the optical system 10 sequentially includes a first lens L1 with negative refractive power, a second lens L2 with positive refractive power, an aperture stop STO, and a first lens L2 with positive refractive power from the object side to the image side. Three lenses L3, a fourth lens L4 with negative refractive power, and a fifth lens L5 with positive refractive power. The surface shape of each lens surface in the optical system 10 is as follows:

[0098] The object side S1 of the first lens L1 is convex at the near optical axis, and the image side S2 is concave at the near optical axis; the object side S1 is convex at the circumference, and the image side S2 is convex at the circumference.

[0099] The object side S3 of the second lens L2 is convex at the near optical axis, and the image side S4 is concave at the near optical axis; the object side S3 is concave at the circumference, and the image side S4 is concave at the c...

no. 2 example

[0138] refer to Figure 4 , in the second embodiment, the optical system 10 sequentially includes a first lens L1 with negative refractive power, a second lens L2 with positive refractive power, an aperture stop STO, and a first lens L1 with positive refractive power from the object side to the image side. Three lenses L3, a fourth lens L4 with negative refractive power, and a fifth lens L5 with positive refractive power. The surface shape of each lens surface in the optical system 10 is as follows:

[0139] The object side S1 of the first lens L1 is convex at the near optical axis, and the image side S2 is concave at the near optical axis; the object side S1 is convex at the circumference, and the image side S2 is concave at the circumference.

[0140] The object side S3 of the second lens L2 is convex at the near optical axis, and the image side S4 is concave at the near optical axis; the object side S3 is concave at the circumference, and the image side S4 is concave at th...

no. 3 example

[0157] refer to Figure 7 , in the third embodiment, the optical system 10 sequentially includes a first lens L1 with negative refractive power, a second lens L2 with positive refractive power, an aperture stop STO, and a first lens L1 with positive refractive power from the object side to the image side. Three lenses L3, a fourth lens L4 with negative refractive power, and a fifth lens L5 with positive refractive power. The surface shape of each lens surface in the optical system 10 is as follows:

[0158] The object side S1 of the first lens L1 is convex at the near optical axis, and the image side S2 is concave at the near optical axis; the object side S1 is convex at the circumference, and the image side S2 is concave at the circumference.

[0159] The object side S3 of the second lens L2 is convex at the near optical axis, and the image side S4 is concave at the near optical axis; the object side S3 is concave at the circumference, and the image side S4 is concave at the...

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Abstract

The invention relates to an optical system, a camera module and electronic equipment. The optical system includes, in order from an object side to an image side along an optical axis: a first lens element with negative refractive power having an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof; a second lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof; a third lens element with positive refractive power having an object-side surface being convex in a paraxial region thereof and an image-side surface being convex in a paraxial region thereof; a fourth lens element with negative refractive power having a concave image-side surface in a paraxial region thereof, and a fifth lens element with positive refractive power, the image-side surface thereof being concave in a paraxial region thereof, both the object-side surface and the image-side surface thereof being aspheric, and at least one of the object-side surface and the image-side surface thereof having a non-rotationally symmetric surface; and the optical system satisfies the conditional expression that tan (semiFOV) / sag 11 is greater than 3.0 mm <-1 > and less than 4.5 mm <-1 >. The design is beneficial to effectively increasing the field angle of the optical system.

Description

technical field [0001] The invention relates to the technical field of photography and imaging, in particular to an optical system, a camera module and electronic equipment. Background technique [0002] Nowadays, wide-angle lenses are widely used in the smartphone industry, and they are an important module that realizes an indispensable shooting mode for mobile phones. A wide-angle lens has the characteristics of a larger field of view and a larger range of scenes that can be captured. It also has the characteristics of a sense of depth in the picture space and a long depth of field. However, the aspheric lenses used in most wide-angle camera lenses at present will inevitably cause large distortion when realizing wide-angle shooting, especially the outer peripheral field of view, which is most affected by distortion. Excessive peripheral field of view distortion will lead to increased off-axis aberration, obvious image distortion, and reduced user experience. In addition, ...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/06
CPCG02B13/0015G02B13/0045G02B13/06G03B30/00
Inventor 华露杨健李明
Owner JIANGXI JINGCHAO OPTICAL CO LTD
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