Surround-view wide-angle athermal lens and automobile panoramic view system

Abstract

The invention provides a surround-view wide-angle athermal lens; the surround-view wide-angle athermal lens is high in resolving power, small in optical distortion and capable of reducing the size ofthe lens, the comprehensive performance of the lens is improved, and the cost is saved; the athermal lens comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens, which aresequentially arranged from an object space to an image space; the first lens is provided with negative focal power, the object surface side of the first lens is a convex surface, and the image surface side of the first lens is a concave surface; the second lens is provided with negative focal power, the object surface side of the second lens is a convex surface, and the image surface side of thesecond lens is a concave surface; the third lens is provided with positive focal power, the object surface side of the third lens is a convex surface, and the image surface side of the third lens is aconvex surface; the fourth lens is provided with negative focal power, the object surface side of the fourth lens is a convex surface, and the image surface side of the third lens is a concave surface; the fifth lens is provided with positive focal power, the object surface side of the fifth lens is a convex surface, and the image surface side of the third lens is a convex surface, wherein the fourth lens and the fifth lens are in optical cementation; and meanwhile, the invention further provides an automobile panoramic view system comprising the surround-view wide-angle athermal lens.

Description

technical field [0001] The invention relates to the technical field of optical lenses, in particular to a surround-view wide-angle athermalization lens and an automobile panoramic surround-view system. Background technique [0002] With the rapid development of image and computer vision technology, more and more technologies are applied to the field of automotive electronics. The traditional image-based reversing camera system only installs a camera at the rear of the car, which can only cover a limited area around the rear of the car. The blind spots around the vehicle and the front of the vehicle undoubtedly increase the hidden dangers of safe driving, and collisions and scratches are prone to occur in narrow and congested urban areas and parking lots. In order to expand the driver's field of vision, it is necessary to be able to perceive the 360° all-round environment, which requires the mutual cooperation of multiple visual sensors and then through video synthesis proces...

AI Technical Summary

Problems solved by technology

[0004] At present, the main ordinary wide-angle lenses in the camera lens market generally adopt an all-glass structure with excessive distortion, or only the first glass lens and the rest are all made of plastic materials, and the temperature compensation performance is not good, which cannot meet the high-end automotive market applications.

There are many defects in the existing surround view lenses on the market, such as insufficient field of view, excessive distortion, high production cost, poor imaging quality, poor temperature compensation characteristics, complex structure, etc., which make it difficult to meet user needs

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