Optical system mirror group, imaging device and electronic device

Abstract

The invention provides an optical system lens set, an image capturing apparatus and an electronic apparatus. The optical system lens set sequentially comprises, from the object side to the image side, a first lens with negative diopter, of which the part of the image side close to the optical axis is a recessed surface, a second lens with positive diopter, a third lens, of which the part of the object side surface close to the optical axis is a recessed surface, and a fourth lens, of which the part of the object side surface close to the optical axis is a convex surface, the part of the image side surface close to the optical axis is a recessed surface, and the part of the image side surface away from the optical axis is a convex surface. The optical system lens set has four lenses in total. The retrofocus structure of the first lens with negative diopter allows light with large visual angle to enter into the system. The second lens with positive diopter can provide the system with sufficient gathering capability, effectively control system space and prevent the total length of lens from being too long. The third lens corrects aberrations, and the fourth lens corrects curvature of the image field. In this way, micromation of large visual angle is achieved.

Description

technical field [0001] The invention relates to an optical system mirror group and an image-taking device, in particular to an optical system mirror group and an image-taking device applicable to electronic devices. Background technique [0002] With the thinning and diversification of electronic products, the application of photography modules is becoming more and more extensive. The application range can include: various smart electronic products, driving lenses, security monitoring, 3D depth sensing devices (such as TOF cameras (Time -of-Flight Camera)), human-computer interaction platform, etc., in order to cope with its development, the lens specifications of the camera module have become more stringent, and wide viewing angles and miniaturization have become the current market trend. [0003] However, in order to obtain a wide range of images, traditional wide-angle lenses often require huge lenses to receive light, and it is difficult to reduce the size of the product...

AI Technical Summary

Problems solved by technology

[0003] However, in order to obtain a wide range of images, traditional wide-angle lenses often require huge lenses to receive light, and it is difficult to reduce the size of the product. This makes it difficult for traditional wide-angle lenses to meet the large viewing angle and short overall length at the same time, or the quality cannot meet the specifications due to too strong stray light. Therefore, the traditional design can no longer meet the specifications and needs of the future market.

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