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High-resolution low-distortion line scanning lens

A high-resolution, line-scan technology, applied to optical components, optics, instruments, etc., to achieve the effect of flexible adjustment of the clear aperture

Pending Publication Date: 2021-05-11
GUANGDONG AOPUTE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing domestic line scan lenses always have different degrees of deficiencies in terms of resolution and distortion.

Method used

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  • High-resolution low-distortion line scanning lens
  • High-resolution low-distortion line scanning lens
  • High-resolution low-distortion line scanning lens

Examples

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Embodiment Construction

[0022] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0023] In the description of this application, unless otherwise clearly specified and limited, the terms "first", "second", and "third" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance; terms "Multiple" refers to two or more; unless otherwise specified or stated, the terms "connected" and "fixed" should be interpreted in a broad sense, for example, "connected" can be fixed or detachable Connected, or integrally connected, or electrically connected; "connected" can be directly connected or indirectly connec...

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PUM

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Abstract

The invention discloses a high-resolution low-distortion line scanning lens, which comprises an optical system, and is characterized in that the optical system is provided with a front group S1 with positive focal power, a diaphragm, a middle group S2 with positive focal power and a rear group S3 with negative focal power in sequence from an object space to an image space, wherein the focal length f of the optical system, the focal length fS1 of the front group, the focal length fS2 of the middle group and the focal length fS3 of the rear group respectively meet the relational expressions: |fS1 / f| is more than 4.40 and less than 5.00, |fS2 / f| is more than 0.75 and less than 1.10, and |fS3 / f| is more than 1.50 and less tan 1.95. By means of the structure, the optical system of the linear scanning lens with the focal length being 60 mm is achieved, the image space F number is 5.1, the resolution ratio of the maximum imaging face can reach 150 lp / mm, namely when a corresponding maximum imaging chip is adopted, the pixel can reach 18 K pixel, and the maximum optical distortion of the full view field is lower than 0.18%; and a whole group focusing mode is adopted, so that the clear aperture can be flexibly adjusted.

Description

technical field [0001] The invention belongs to the technical field of machine vision lenses, and in particular relates to a high-resolution and low-distortion line-scanning lens. Background technique [0002] In the wave of industrial automation, machine vision systems are widely used in all walks of life. In electronics manufacturing, liquid crystal screen defect detection, printing detection, non-woven fabric detection, mobile phone touch screen smooth surface scratches, crack detection and other applications, the detection accuracy of machine vision systems is getting higher and higher, which means that its core components line scanning The resolution of the lens should be improved as much as possible; at the same time, in some applications such as dimension measurement, pin positioning, tray positioning, and circuit substrate positioning, the distortion of the line scan lens is required to be as small as possible. However, the existing domestic line scan lenses always ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00
CPCG02B13/00
Inventor 曾振煌林佳敏卢盛林
Owner GUANGDONG AOPUTE TECH CO LTD
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