8-Megapixel 50 mm machine vision prime lens unit
A machine vision and lens technology, applied in instruments, optical components, optics, etc., can solve the problems of poor image quality, high cost, difficult processing and assembly, etc., and achieve the effect of high yield, low cost, and good tolerance manufacturability.
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[0017] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.
[0018] like Figures 1 to 2 As shown, an 8-megapixel 50mm fixed-focus machine vision lens includes a lens and an optical device group arranged in the lens. Two positive crescent lenses 20 , a first cemented lens composed of a third positive crescent lens 30 and a negative meniscus lens 40 , a diaphragm 50 , a second cemented lens composed of a biconcave lens 60 and a first biconvex positive lens 70 , the second biconvex positive lens 80, the first positive crescent lens 10, the second positive crescent lens 20, the third positive crescent lens 30 are in close contact with each other at the centers and the distance between the edges of the negative meniscus lens 40 and the diaphragm 50 is 1.7 mm, the distance between the diaphragm 50 and the edge of the biconcave lens 60 is 2.45mm, and the center distance between the first biconvex posi...
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