F25mm high-resolution and low-distortion half-group mobile industrial lens and working method thereof

Abstract

The invention provides an F25mm high-resolution and low-distortion half-group mobile industrial lens and a working method thereof. The F25mm high-resolution and low-distortion half-group mobile industrial lens includes a lens barrel assembly and an optical system arranged in the lens barrel assembly. The optical system includes a front group of lenses, a diaphragm, a rear group of lenses, a compensation group of lenses and an imaging plane arranged in the direction from the incidence of light to the imaging plane. The front group of lenses is composed of a negative crescent lens A-1 and a first cemented group of lenses formed by closely connecting a negative crescent lens A-2 and a negative crescent lens A-3. The rear group of lenses is composed of a second cemented group of lenses formedby closely connecting a biconcave lens B-1 and a biconvex lens B-2, and a biconvex lens B-3. The compensation group of lenses is composed of a third cemented group of lenses formed by closely connecting a biconvex lens D-1 and a biconcave lens D-2. The eight lenses in the front group, the rear group and the upper part of the compensation group of the industrial lens are made of an optical glass material with high refractive index and low dispersion, so that the MTF of the lens can meet the relational expression 150lp / mm>0.3.

Description

technical field [0001] The invention relates to a f25mm high-resolution low-distortion semi-group mobile industrial lens and a working method thereof. Background technique [0002] With the development of science and technology, the application of industrial lenses is more extensive, and the requirements for them are becoming more and more stringent. At present, in the field of industrial lenses, there are common problems such as large optical distortion, unclear imaging, bulky lenses, and mechanical blockage. Inability to adapt to work at high or low temperatures, poor anti-vibration and drop effects, etc., have begun to fail to meet the existing market demand. Contents of the invention [0003] The present invention improves the above-mentioned problems, that is, the technical problem to be solved by the present invention is to enable the industrial lens to achieve clear imaging at a focal length of 25mm, simple operation, stable structure and strong controllability and ...

AI Technical Summary

Problems solved by technology

[0002] With the development of science and technology, the application of industrial lenses is more extensive, and the requirements for them are becoming more and more stringent. At present, in the field of industrial lenses, there are common problems such as large optical distortion, unclear imaging, bulky lenses, and mechanical blockage. Can't adapt to work at high or low temperature, poor anti-vibration, drop effects and other shortcomings, have begun to fail to meet the existing market demand

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