8mm fixed focus machine vision lens

Abstract

The invention belongs to the technical field of machine vision camera lenses and particularly relates to a machine vision camera lens with an 8mm fixed focus. The machine vision camera lens comprises a first lens with a concave-convex structure, a second lens with a double-concave structure, a third lens with a concave-convex structure, a fourth lens with a double-convex structure, a fifth lens with a double-convex structure, a sixth lens with a double-concave structure, a seventh lens with a concave-convex structure and an eighth lens with a double-convex structure, wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens are sequentially arranged in a way that the central shafts are coaxial along the light-incident direction; due to the combination of the eight lenses, the pixel value of the camera lens with the 8mm focus can be up to 5 megapixels when the size of a corresponding chip is 2 / 3', so that the high-end product demand is met; and meanwhile, the clear aperture is adjustable within the range of F2.5-F16. The machine vision camera lens with the 8mm fixed focus is compact in structure, convenient to assemble and capable of reducing the production cost.

Description

technical field [0001] The invention belongs to the technical field of machine vision lenses, and in particular relates to an 8mm fixed-focus machine vision lens. 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 two types: 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 rapid development of the microelectronics industry, machine vision systems with high resolution and high processing speed have been born continuously, which puts forward new requirements for the matching o...

AI Technical Summary

Problems solved by technology

However, for the existing domestic machine vision lens with a focal length of 8mm, when the corresponding chip size is 2 / 3", the pixels cannot reach 5 million, which cannot meet the needs of high-end products.

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