Optical zoom system, camera module and electronic equipment

A technology of optical zoom and lens group, applied in optics, optical components, instruments, etc.
CN112684599APending Publication Date: 2021-04-20JIANGXI JINGCHAO OPTICAL CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
JIANGXI JINGCHAO OPTICAL CO LTD
Publication Date
2021-04-20

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Abstract

The invention relates to an optical zoom system, a camera module and electronic equipment. The optical zoom system includes: a first lens group having negative refractive power and including a first lens and a second lens; a second lens group having positive refractive power and including a third lens, a fourth lens, and a fifth lens; and a third lens group having negative refractive power and including a sixth lens and a seventh lens. In the zooming process from the short-focus end to the long-focus end, the distance between the first lens group and the second lens group is reduced, and the distance between the third lens group and the imaging surface is increased; the system satisfies the following relationship: 0.2 < (R5-R6) / R8 < 3; and R5 is the curvature radius of the object side surface of the third lens at the optical axis, R6 is the curvature radius of the image side surface of the third lens at the optical axis, and R8 is the curvature radius of the image side surface of the fourth lens at the optical axis. The optical zoom system satisfying the above relationship is beneficial for enabling the aberration component between the lens groups to reach a balanced state, thereby being beneficial for improving the imaging quality.
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Description

technical field

[0001] The invention relates to the technical field of photography and imaging, in particular to an optical zoom system, a camera module and electronic equipment. Background technique

[0002] With the development of camera technology, the camera module has gradually developed from a fixed-focus system with relatively limited camera conditions to a zoom system that can switch between different camera conditions. The zoom design can make the system change correspondingly in parameters such as focal length, field of view, aperture number, etc., so that it can have the function of switching between the long-focus end and the short-focus end, and then can adapt to certain imaging quality while ensuring certain imaging quality. Different camera requirements such as object distance, depth of field, shooting range, etc.

[0003] But generally, with the relative movement between some lenses in the zoom system, the aberrations generated by the lens or the lens group ...

Claims

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