High-resolution large-target surface machine vision lens

Abstract

The invention relates to the technical field of a lens, in particular to a high-resolution large-target surface machine vision lens. The high-resolution large-target surface machine vision lens sequentially comprises a focusing group and a fixing group in the light incident direction, wherein the focusing group sequentially comprises a first lens, a first balsaming lens group, a diaphragm, a second balsaming lens group and a sixth lens. The focal length of the high-resolution large-target surface machine vision lens and the focal length of the focusing group meets the following relationship that the absolute value of f(focusing) / f is greater than or equal to 0.9 but smaller than or equal to 1.3; the focal length of the high-resolution large-target surface machine vision lens and the combined focal length of the second balsaming lens group and the sixth lens meet the following relationship that the absolute value of f(U2+G6) / f is greater than or equal to 0.8 but smaller than or equal to 1.2. The high-resolution large-target surface machine vision lens has the characteristics of high resolving power, large target surface, small size, low distortion and the like; the work distance can support 0.2m to the infinity, and is applicable to the lens with the focal length being 35mm; the high-resolution large-target surface machine vision lens is very suitable for being used as a machine vision lens.

Description

technical field [0001] The invention relates to the field of lens technology, in particular to a machine vision lens with high resolution and large target surface. Background technique [0002] Machine vision lenses are widely used in manufacturing, quality inspection, logistics, medicine, scientific research and other fields. With the implementation of the Made in China 2025 strategy, industrial automation is developing rapidly, and machine vision lenses occupy an important position as the "eyes" of automated machines. [0003] Machine vision image acquisition equipment is divided into line array and area array according to the chip type. At present, area array cameras are widely used. Area array cameras are generally used to monitor and detect targets within a specific range at a fixed position. With the development of chip technology and the improvement of detection levels, higher requirements are put forward for machine vision lenses: small footprint, large target area,...

AI Technical Summary

Problems solved by technology

[0004] Traditional machine vision lenses generally support a target surface below 2 / 3” and a resolution below 5 megapixels, which can no longer meet the large needs of the industry. In addition, the whole group focusing method adopted by traditional lenses is difficult to meet a wide range of work Distance requirements, such as when the working distance is far from the best working position, the edge image quality drops significantly

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