75 mm fixed-focus machine vision lens

A machine vision and lens technology, applied in the direction of instruments, installation, optics, etc., can solve the problems of large optical distortion, low pixel, and inability to meet the needs of high-end products, and achieve the effect of meeting the needs of high-end products and low distortion

Active Publication Date: 2018-02-27
GUANGDONG AOPUTE TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the domestic machine vision lens with a focal length of 75mm, when the camera chip size is 2 / 3", the pixels are relatively low and the optical distortion is large, which cannot meet the needs of high-end products.

Method used

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  • 75 mm fixed-focus machine vision lens
  • 75 mm fixed-focus machine vision lens
  • 75 mm fixed-focus machine vision lens

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Embodiment Construction

[0020] Certain terms are used, for example, in the description and claims to refer to particular components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. As mentioned throughout the specification and claims, "comprising" is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

[0021] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", horizontal" etc. are based on th...

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Abstract

The invention relates to the technical field of machine vision lenses, in particular to a 75 mm fixed-focus machine vision lens. The 75 mm fixed-focus machine vision lens includes a mechanical systemand an optical system which is installed inside the mechanical system; the optical system includes a first lens G1 to an eighth lens G8 in sequence from an object side to an image side, the focal length of the optical system is f, and f, the focal length f1 of the first lens and the focal length f2 of the second lens meet the relation shown in the description; f, the focal length f3 of the third lens and the focal length f4 of the fourth lens meet the relation shown in the description; the focal lens of a balsaming lens B1 is fB1, and fB1 and the focal length f of the optical system meet the relation shown in the description. Through the arrangement of the first lens G1 to the eighth lens G8, the range condition of the focal lengths of the lenses achieves the purpose that when the focal length is 75 mm and the size of a corresponding chip is 2 / 3, the pixel value of the 75 mm fixed-focus machine vision lens can reach 5-megapixel, the distortion rate is smaller than 0.02%, the requirements of high-end products are met, and at the same time, the clear aperture of the 75 mm fixed-focus machine vision lens can also be flexibly adjusted.

Description

technical field [0001] The invention relates to the technical field of machine vision lenses, in particular to a 75mm fixed-focus machine vision lens. Background technique [0002] Machine vision is a system that uses machines instead of human eyes for measurement and judgment. Mainly through the visual device (ie industrial camera and optical lens), the ingested target is converted into an image signal and sent to the signal processing system. The signal processing system converts the pixel distribution, brightness, color and other information in the image into a digital signal; then the image The processing software performs various operations on these digital signals to extract the characteristics of the target, and then makes measurement and judgment on the ingested target according to the characteristics. [0003] In recent years, with the rapid development of the microelectronics industry, machine vision systems with high resolution and high processing speed have been...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B7/02G02B7/10
CPCG02B7/026G02B7/10G02B13/00
Inventor 卢盛林
Owner GUANGDONG AOPUTE TECH CO LTD
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