Small fisheye lens with high resolution and application thereof

Abstract

The invention provides a small fisheye lens with high resolution and application thereof. A first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens, a filter disc and an image plane IMA are sequentially arranged in the incident direction of an optical axis; the first lens has negative focal power, the object side surface is a convex surface, and the image side surface is a concave surface; the second lens has negative focal power, the object side surface of the second lens is a convex surface, and the image side surface is a concave surface; the third lens has positive focal power, the object side surface of the third lens is a convex surface, and the image side surface is a convex surface or a concave surface; the fourth lens has positive focal power, the object side surface of the fourth lens is a convex surface, and the image side surface is a convex surface or a concave surface; the fifth lens has negative focal power, the object side surface of the fifth lens is a concave surface, and the image side surface is a concave surface or a convex surface; the sixth lens has positive focal power, the object side surface of the sixth lens is a convex surface, and the image side surface is a convex surface; the structure is simple, miniaturization of the lens module is facilitated, the cost is low, the lens has high resolution and clear imaging, and meanwhile the lens has high relative illumination and better image illumination uniformity.

Description

technical field [0001] The invention relates to the technical field of optical imaging, in particular to a small fisheye lens with high resolution and its application. Background technique [0002] In recent years, with the development of in-vehicle technology, the technical requirements for front-view camera devices, surround-view camera devices, automatic cruise devices, and in-vehicle cameras are getting higher and higher. Among them, the surround-view vehicle lens is an important part of the advanced driver assistance system. The driver can intuitively see the obstacles around the car through the surround-view vehicle lens to avoid driving accidents. [0003] However, the image captured by the traditional surround-view camera lens has low resolution, large volume, high cost, and cannot achieve high-definition imaging at the same time as shooting in a wide angle range, which cannot enable the driving assistance system to accurately judge the environmental information arou...

AI Technical Summary

Problems solved by technology

[0003] However, the resolution of the image captured by the traditional surround-view camera lens is low, the volume is large, the cost is high, and it is impossible to achieve high-definition imaging while shooting in a wide range of angles, and it is impossible for the driving assistance system to accurately judge the environmental information around the vehicle in real time. Make timely warning or avoidance, there is a driving risk

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