Small day and night dual-purpose vehicle-mounted optical system and working method thereof

Abstract

The invention relates to a small day-night dual-purpose vehicle-mounted optical system and a working method thereof. The small day-night dual-purpose vehicle-mounted optical system comprises a front group of lenses, a diaphragm, a rear group of lenses and an optical filter which are sequentially arranged in the incident direction of light from left to right, and the front group of lenses comprisesa plano-concave negative lens and a plano-convex positive lens; the rear group lens comprises a meniscus positive lens and a gluing group formed by tightly connecting a biconvex positive lens and a meniscus negative lens; the invention further relates to a working method of the small day and night dual-purpose vehicle-mounted optical system. The optical system has the advantages of large light flux, high-definition image quality, small and compact structure and the like, can keep clear image imaging in a temperature range of-40 DEG C to + 85 DEG C, has a day and night dual-purpose function, can realize clear imaging in visible light and near infrared light at the same time, and can be used for in-vehicle face monitoring, face recognition and gesture recognition.

Description

technical field [0001] The invention relates to a small day and night vehicle-mounted optical system and its working method. Background technique [0002] With the development of the smart car industry, in-vehicle scene monitoring is becoming more and more important. Its content includes face monitoring, face recognition, gesture recognition, etc., and the corresponding requirements for in-vehicle lenses are getting higher and higher. The light environment in the car is quite different in the morning and evening, and the use of ordinary car lenses will lead to differences in imaging quality at different times, which cannot meet the requirements of stable imaging for scene monitoring. It is difficult to design the lens solution for day and night use. At present, the small lens solutions for in-vehicle monitoring on the market generally use aspheric plastic lenses, many of which do not have day and night confocal performance; and plastic lenses have a large expansion coefficie...

AI Technical Summary

Problems solved by technology

[0003] The present invention improves the above-mentioned problems, that is, the technical problem to be solved by the present invention is that ordinary vehicle-mounted lenses will cause differences in imaging quality at different time periods, which cannot meet the requirements of scene monitoring and stable imaging

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