Vehicle-mounted forward-looking optical system and camera module applying same

Abstract

The embodiment of the invention discloses a vehicle-mounted forward-looking optical system. The system sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, asixth lens and a seventh lens from an object plane to an image plane along an optical axis; the object plane side of the first lens is a convex surface, the image plane side is a concave surface, andthe focal power is negative; the second lens is a biconcave lens, and the focal power of the second lens is negative; the third lens and the fifth lens are biconvex lenses, and the focal power of thethird lens and the fifth lens is positive; the object plane sides of the fourth lens and the seventh lens are convex surfaces, and the focal power is positive; the object plane side of the sixth lensis a concave surface, and the focal power of the sixth lens is negative. On the other hand, the embodiment of the invention further provides a camera module. The optical system or the camera module ismainly composed of seven lenses. The number of the lenses is small, the structure is simple, the cost is low, and the overall appearance of the optical system or the camera module is moderate. Meanwhile, the optical system or the camera module has the optical performances of large aperture, high pixel, large aperture, good athermalization and the like, and is suitable for the field of vehicle-mounted lenses.

Description

Technical field: [0001] The invention relates to an optical system and a camera module for its application, in particular to a vehicle-mounted front-view optical system and a camera module for its application in the field of vehicles. Background technique: [0002] 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 field of view and higher resolution pixels. However, the existing optical systems or modules used...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the common problems of too many lenses and complex structures in the existing optical systems or modules used in the vehicle field, the embodiments of the present invention provide a vehicle-mounted front-view optical system on the one hand

Images