Optical imaging system, image pick-up module, electronic device and automobile

Abstract

The invention discloses an optical imaging system, image pick-up module and electronic device. The optical imaging system includes a first lens group, a second lens group and a third lens group whichare distributed from an object side to an image side. The first lens group has negative refraction power and comprises at least one lens; a surface closest to the image side is concave at a position close to an optical axis. The second lens group has positive refraction power and comprises at least two lenses; the surface, closest to the image side, of the second lens group is a convex surface ata position close to the optical axis. The third lens group hasrefraction power and comprises at least three lenses; the surface, closest to the object side, of the third lens group is a concave surface at a position close to the optical axis; the surface, closest to the image side, of the third lens group is a convex surface at a position close to the optical axis. The optical imaging system satisfies the following conditional expression: SD2 / R2<1. The optical imaging system can maintain good optical performance while maintaining small size and light weight, and can well capture details of a photographed object.

Description

technical field [0001] The invention relates to the technical field of optical imaging, in particular to an optical imaging system, a camera module, an electronic device and an automobile. Background technique [0002] With the development of the vehicle industry, the technical requirements for vehicle lenses such as front view, automatic cruise control, driving recorder, and reversing images are getting higher and higher, especially the vehicle front view lens, which is installed in front of the vehicle to make driving Personnel can intuitively see the obstacles in front of the car. [0003] At present, in the existing vehicle-mounted front-view lens, in order to meet the requirement of clarity, a higher requirement is placed on the degree of curvature of the first lens (the lens closest to the object side), which will make the processing of the first lens difficult. Large, high cost, and the processed first lens is also prone to ghosting problems during use. Contents of...

AI Technical Summary

Problems solved by technology

[0003] At present, in the existing vehicle-mounted front-view lens, in order to meet the requirement of clarity, a higher requirement is placed on the degree of curvature of the first lens (the lens closest to the object side), which will make the processing of the first lens difficult. Large, high cost, and the processed first lens is also prone to ghosting problems during use

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