Large-aperture optical system and camera shooting module applying same

Abstract

The embodiment of the invention discloses a large-aperture optical system. The large-aperture optical system sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens along the optical axis from the object surface to the image surface; the object surface side of the first lens is a convex surface, the image surface side of the first lens is a concave surface, and the focal power of the first lens is negative; the object surface side of the second lens is a convex surface, the image surface side of the second lens is a concave surface, and the focal power of the second lens is negative; the object surface side of the third lens is a concave surface, the image surface side of the third lens is a convex surface, and the focal power of the third lens is positive; the fourth lens is a biconvex lens, and the focal power of the fourth lens is positive; the focal power of the fifth lens is negative; and the sixth lens is a biconvex lens, andthe focal power of the sixth lens is positive. On the other hand, the embodiment of the invention further provides a camera shooting module. The large-aperture optical system is mainly composed of the six lenses, the number of lenses is small, the structure is simple, and the cost is low; and the different lenses are mutually combined, the focal power is reasonably distributed, optical performance such as the large aperture, high pixel, low distortion and good athermalization is achieved, and the large-aperture optical system and the camera shooting module are suitable for the vehicle-mountedfield.

Description

[0001] Technical field: [0002] The invention relates to an optical system and a camera module for its application, in particular to a large aperture optical system and a camera module for its application in the vehicle field. [0003] Background technique: [0004] With the application and popularization of automotive safety driving systems, optical systems or modules in the automotive field have also been widely used. There are also more and more demands for application lenses used in front vehicle collision warning, track deviation warning, pedestrian recognition warning and so on. This type of optical system or module is required to be able to adapt to clear images in daytime and low-light environments, so the lens needs to consider a large aperture; at the same time, in order to meet the details of the wide field of view, the optical system or module needs to have a larger angle of view. However, the existing optical systems or modules used in the vehicle field generall...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the common problems of too many lenses and complicated structures in the existing optical systems or modules used in the vehicle field, the embodiments of the present invention provide a large-aperture optical system on the one hand

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