Fatigue driving monitoring optical system and camera module applying same

Abstract

The embodiment of the invention discloses a fatigue driving monitoring optical system. The fatigue driving monitoring optical system sequentially comprises a first lens, a second lens, a third lens, afourth lens and a fifth 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 object plane side of the second lens is a convex surface, the image plane side of the second lens is a convex surface, and the focal power is positive; the object plane side of the third lens is a concave surface, the image plane side is a convex surface, and the focal power is negative; the object plane side of the fourth lens is a concave surface, the image planeside is a concave surface, and the focal power is negative; the image plane side of the fifth lens is a convex surface, the image plane side is a convex surface, and the focal power is positive. On the other hand, the embodiment of the invention further provides a camera module. The optical system and the camera module provided by the embodiment of the invention have the advantages of small size,light weight and low cost; meanwhile, the method has the advantages of small distortion, high resolving power, excellent temperature characteristics and the like.

Description

Technical field: [0001] The invention relates to an optical system and an applied camera module, in particular to a fatigue driving monitoring optical system and an applied camera module. Background technique: [0002] At present, the safe driving of automobiles, especially long-distance driving, and fatigue driving have caused major hidden dangers to life safety, so fatigue driving early warning systems have emerged as the times require. The fatigue driving warning system is based on the driver's physiological image response. It consists of two modules: ECU and optical system or camera module. It uses the driver's facial features, eye signals, head movement, etc. to infer the driver's fatigue state, and A device for alarming and taking corresponding measures. Fatigue recognition relies on the optical system or camera module to capture images, but due to the reflection of glasses and the complex light environment in the car, if the optical system or camera module forms imag...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problems of large number of lenses and large volume in existing fatigue driving monitoring optical systems or camera modules, the embodiments of the present invention provide a fatigue driving monitoring optical system on the one hand

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