Ultra-wide field small distortion vehicle lens optical system

Abstract

The present invention relates to an ultra-wide field small distortion vehicle lens optical system. The optical system comprises a first lens L1 having negative power, a second lend L2 having negative power, a third lens L3 having negative power, a fourth lens having positive power, a fifth lens L5 having positive power and an infrared cutoff filter L6 which are arranged from an object to be shot to an image plane in order, and the object to be shot can realize clear imaging at the image plane through integrally moving the lens at different distances. The first lens, the fourth lens and the fifth lens are glass aspherical lenses, and others are glass lenses. The optical system is big in the angle of visual field and small in distortion and size, has no TV distortion, and has no temperature drift defocusing phenomenon in the temperature range from 20-85 DEG c.

Description

technical field [0001] The invention belongs to the technical field of digital display, and in particular relates to an ultra-wide-angle and small-distortion vehicle-mounted lens optical system Background technique [0002] In recent years, as people's demand for safe driving of locomotives has become stronger, vehicle-mounted rearview cameras have developed rapidly. However, the current rear-view lenses on the market face many problems: first, the general resolution is not high, basically 300,000 pixels, and it is difficult to see clearly; second, the field of view is not large enough, and most products have a very small horizontal field of view It is difficult to break through 120°; moreover, the distortion is large, and the image distortion is obvious. Some high-end products have not solved the distortion problem, so they have to add an expensive electronic algorithm processor to the system, and perform electronic distortion correction through software algorithms; there i...

AI Technical Summary

Problems solved by technology

However, the current rear-view lenses on the market face many problems: first, the general resolution is not high, basically 300,000 pixels, and it is difficult to see clearly; second, the field of view is not large enough, and most products have a very small horizontal field of view It is difficult to break through 120°; moreover, the distortion is large, and the image distortion is obvious. Some high-end products have not solved the distortion problem, so they have to add an expensive electronic algorithm processor to the system, and perform electronic distortion correction through software algorithms; there is poor reliability. , some products use a large number of plastic aspheric surfaces in order to reduce costs, and the thermal stability is poor, so it is difficult to ensure normal operation in extremely cold or extremely hot environments

[0003] With the development of Internet of Vehicles technology, the demand for real images is becoming more and more intense, which requires the rearview lens of the vehicle to have higher definition, larger angle, distortion-free picture and better thermal stability. At present, there is no optical The system can solve the above problems well

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