High-resolution prime lens

Abstract

The invention relates to the technical field of machine vision lenses, in particular to a high-resolution prime lens comprising a mechanical system and an optical system mounted inside the mechanicalsystem. The optical system includes a first lens G1 having the negative focal power and the meniscus structure, a second lens G2 having the positive focal power and meniscus structure, a third lens G3having the negative focal power and meniscus structure, a fourth lens G4 having the negative focal power and double-concave structure, a fifth lens G5 having the positive focal power and a biconvex structure, and a sixth lens G6 having the negative focal power and meniscus structure, wherein the lenses are arranged successively from the object space and the image space. Therefore, the optical system of the prime machine vision lens with the focal length of 8mm is realized; the image F number is 2.8; the maximum imaging surface is phi9mm; the resolution is high; the highest resolution reachesup to 230lp / mm; and the lens can match the small pixel chip having the length of 2.2 microns and the clear aperture can be adjusted flexibly.

Description

technical field [0001] The invention belongs to the technical field of machine vision lenses, and in particular relates to a high-resolution fixed-focus lens. Background technique [0002] In the wave of industrial automation, machine vision systems are widely used in all walks of life, and in electronics manufacturing, liquid crystal screen defect detection, food packaging, color sorting and other applications, the requirements for imaging resolution are getting higher and higher. In addition, with the continuous advancement of chip technology, the pixel size is getting smaller and smaller, which requires the matching lens resolution to be further improved. However, the resolution of the existing fixed-focus machine vision lenses in China is generally not high enough, and the performance of the camera cannot be fully utilized when matched with the imaging chip of the small pixel. The specific shortcomings include: large optical distortion, low resolution, bulky lens or rem...

AI Technical Summary

Problems solved by technology

However, the resolution of the existing fixed-focus machine vision lenses in China is generally not high enough, and the performance of the camera cannot be fully utilized when matched with the imaging chip of the small pixel.

The specific shortcomings include: large optical distortion, low resolution, bulky lens or remote working distance, etc. Therefore, the research and development of lenses with higher optical performance is more urgent

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