Infrared confocal in-vehicle monitoring optical system and camera module using same

Abstract

The embodiment of the invention discloses an infrared confocal in-vehicle monitoring optical system. The infrared confocal in-vehicle monitoring optical system sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth 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, and the focal power is negative; the object plane side of the second lens is a convex surface, and the focal power is positive; the image surface side of the thirdlens is a concave surface, and the focal power is negative; the fourth lens and the fifth lens are biconvex lenses, and the focal power of the fourth lens and the fifth lens is positive; the object plane side of the sixth lens is a concave surface, the image plane side is a convex surface, and the focal power is negative. On the other hand, the embodiment of the invention further provides a camera module. The optical system or the camera shooting module is mainly composed of six lenses, the number of the lenses is small, the structure is simple, and the cost is low; meanwhile, different lenses are mutually combined, the focal power is reasonably distributed, and the lens has the optical properties of infrared confocal property, high pixel, good thermal compensation 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 an applied camera module, in particular to an optical system and an applied camera module in the field of in-vehicle monitoring. 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. The demand for lenses used in the field of in-vehicle monitoring is also increasing. In order to meet the detailed identification of a wide field of view, the optical system or module needs to have a larger field of view and higher-definition pixels. However, the existing optical systems or modules used in the automotive field generally have defects such as too many lenses, complex structures, or too few pixels, making it difficult to meet the needs of the market. Invention content: [0003] In order to overcome the common problems of too many lenses and complex structures in existing optic...

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, an embodiment of the present invention provides an infrared confocal in-vehicle monitoring optical system

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