Zero-distortion optical lens

Abstract

The invention provides a zero-distortion optical lens which comprises a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a diaphragm, a sixth lens L6, a seventh lens L7, an optical filter and protective glass which are sequentially arranged from left to right along a light incident light path, the first lens L1 is a positive meniscus lens, the second lens L2 is a negative meniscus lens, and the third lens L3 is a negative meniscus lens. The third lens L3 is a meniscus positive lens, the fourth lens L4 is a biconcave negative lens, the fifth lens L5 is a meniscus positive lens, the sixth lens L6 is a meniscus negative lens, and the seventh lens L7 is a biconvex positive lens. The optical lens is more stable in optical performance, simpler in structure, lower in tolerance sensitivity, easy to assemble, lower in cost and more suitable for large-scale high-yield production.

Description

technical field [0001] The invention relates to a zero-distortion optical lens. Background technique [0002] The industrial lens is the core of the machine vision system. It is an optical system that replaces the human eye for optical measurement by capturing the target position, appearance and other characteristics, thereby laying the foundation for subsequent image recognition and other operations. However, the existing industrial lenses are usually difficult to meet the requirements of high resolution and low distortion at the same time, which severely limits the machine's perception and detection of the surrounding environment and targets. Therefore, the current market urgently needs an optical lens with high image quality and low distortion to break through the bottleneck of research and development and application of current machine vision systems. Contents of the invention [0003] The present invention improves the above problems, that is, the technical problem t...

AI Technical Summary

Problems solved by technology

However, the existing industrial lenses are usually difficult to meet the requirements of high pixel and low distortion at the same time, which seriously limits the machine's perception and detection of the surrounding environment and targets

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