8-Megapixel 50 mm machine vision prime lens unit

Abstract

The invention provides an 8-megapixel 50 mm machine vision prime lens unit, comprising a lens and an optical device assembly arranged in the lens; the optical device assembly includes a first positive meniscus lens, a second positive meniscus lens, a first doublet lens composed of a third positive meniscus lens and a negative meniscus lens, a diaphragm, a second doublet lens composed of a double-concave lens and a first double-convex positive lens, and a second double-convex positive lens; the first positive meniscus lens, the second positive meniscus lens and the third positive meniscus lens are attached to one another at their centers, a distance between the meniscus negative lens and the diaphragm is 1.7 mm, a distance between the diaphragm and the double-concave lens is 2.45 mm, a distance between the center of the first double-convex positive lens and the center of the second double-convex positive lens is 1.7 mm, a distance between the diaphragm and the double-concave lens is 2.45 mm, and a distance between the center of the first double-convex positive lens and the center of the double-convex positive lens is 5.26 mm. Compared with the prior art, the 8-megapixel 50 mm machine vision prime lens unit has the advantages that the clear aperture is large, the aperture of a first side is greater than phi 30 mm, the definition is high, the definition is greater than 8 megapixels and distortion is small when a probe is 2 / 3 inch, and the 8-megapixel 50 mm machine vision prime lens unit is less than 0.1% in distortion, low in cost, good in tolerance processibility and high in yield.

Description

technical field [0001] The invention relates to a 50mm fixed-focus machine vision lens with 8 million pixels. Background technique [0002] Machine vision is the use of machines instead of human eyes for measurement and judgment. The machine vision system refers to converting the ingested target into an image signal through a machine vision product (that is, an image capture device, which is divided into CMOS and CCD), and sending it to a dedicated image processing system. The image system performs various calculations on these signals to extract the characteristics of the target, and then controls the on-site equipment actions according to the results of the discrimination. [0003] In recent years, with the introduction of Industry 4.0, the smart factories, smart production and smart logistics included in it all need machine "eyes". Therefore, various machine vision lenses (industrial lenses) came into being. At present, the focal lengths of most domestic industrial len...

AI Technical Summary

Problems solved by technology

[0004] The present invention improves the above problems, that is, the technical problem to be solved by the present invention is that existing small focal length lenses are difficult to process and assemble when the visual lens aperture is increased, and the image quality is poor and the cost is high

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