An optical imaging system for vehicle monitoring

Abstract

The invention discloses an optical imaging system for vehicle-mounted monitoring, which comprises a front lens group with positive refractive power, a diaphragm, a rear lens group with positive refractive power and an optical filter arranged in sequence from the object plane to the image plane. The front lens group is sequentially provided with a first lens with negative refractive power, a second lens with negative refractive power and a third lens with positive refractive power, and the rear lens group is sequentially provided with a fourth lens with positive refractive power , a fifth lens with negative refractive power and a sixth lens with positive refractive power, wherein the fourth lens and the fifth lens are combined into a cemented lens. Through the rational design of the lens structure, the present invention finally designs an optical lens for on-board monitoring with a total optical length shortened to less than 18.3mm, a back intercept of 4.8mm, a total field of view of 143°, and a resolution of 2 million pixels. Imaging system, the lens volume is smaller; the relative aperture is large, and the imaging quality is still good when shooting at night under low light, and the cost is effectively reduced.

Description

technical field [0001] The invention relates to an optical imaging system, in particular to an optical imaging system applied to driving recorders and vehicle monitoring. Background technique [0002] With the development of society, the requirements for safety and monitoring in various fields are getting higher and higher, especially in the field of transportation and vehicle monitoring. At present, the mainstream surveillance, camera, and vehicle-mounted lenses on the market are mainly of low resolution, and cannot work normally when the light is weak, especially at night. It is far from being able to meet the requirements of high-definition pictures and 24-hour normal work required by monitoring, camera, and vehicle requirements. With the development of the security industry and the maturity of monitoring technology, the demand and quality of the lens continue to increase. Moreover, at present, vehicle-mounted products are developing toward high image quality and miniat...

AI Technical Summary

Problems solved by technology

The existing vehicle-mounted lens cannot meet the high imaging quality requirements of the current driving recorder in terms of definition, while the same type of high-definition security lens is generally larger in size, longer in length, exceeding 20mm, and the field of view is not large enough, so it is not suitable for application in-vehicle system

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