Fixed-focus machine vision lens having high resolution ratio and wide working distance

Abstract

The invention discloses a fixed-focus machine vision lens having high resolution ratio and wide working distance. The fixed-focus machine vision lens having high resolution ratio and wide working distance comprises a first lens G1, a second lens G2, a third lens G3, a fourth lens G4, a fifth lens G5, a sixth lens G6, a seventh lens G7 and an eighth lens G8, which are sequentially arranged from anobject space to an image space; the second lens G2 and the third lens G3 are cemented, so that a first cemented lens U1 is formed; the fourth lens G4 and the fifth lens G5 are cemented, so that a second cemented lens U2 is formed; the seventh lens G7 and the eighth lens G8 are cemented, so that a third cemented lens U3 is formed; the focal lengths of an optical system, the first cemented lens U1,the second cemented lens U2 and the third cemented lens U3 are f, fU1, fU2 and fU3 respectively; and all respectively satisfy a relational expression as shown in the specification. The fixed-focus machine vision lens having high resolution ratio and wide working distance disclosed by the invention has the characteristics of being high in resolution ratio, wide in working distance and low in distortion.

Description

technical field [0001] The invention belongs to the technical field of machine vision lenses, in particular to a fixed-focus machine vision lens with high resolution and wide working distance. Background technique [0002] The function of the machine vision system is to use the machine to measure, judge and detect defects on the target parts, so as to reduce or eliminate the misjudgment during human operation, and improve the measurement accuracy and stability. Its core principle is to collect the light signal to the camera through the machine vision lens, and then the camera converts the light signal into an electrical signal and transmits it to the image processing system. The result to control the equipment action on site. [0003] On the one hand, in the context of industrial automation, the demand for machine vision is increasing day by day, especially in many industries such as electronics manufacturing, food packaging, and precision measurement, the requirements for ...

AI Technical Summary

Problems solved by technology

However, the existing domestic fixed-focus machine vision lenses generally have shortcomings such as low resolution and single working distance, so the research and development of high-resolution and wide working distance fixed-focus machine vision lenses is more urgent

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