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Method for detecting bending degree of bent plate

A detection method and bending technology, applied in the field of optical detection, can solve the problems of high personnel requirements, high detection cost, large detection error, etc., and achieve high precision and high efficiency

Inactive Publication Date: 2016-06-29
SICHUAN CCO DISPLAY TECH
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

[0002] Curved screens have gradually replaced the previous flat screens, but the curved surface of the accompanying protective glass has been tested by 3D measuring instruments, flat plates and feeler gauges, etc., which have very low detection efficiency, large inspection errors, and high personnel requirements. There are many shortcomings such as high detection cost and inability to realize online detection

Method used

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Embodiment Construction

[0015] The present invention will be further elaborated below in conjunction with specific examples.

[0016] The detection method of the bending degree of the curved flat plate of the present invention comprises the following steps: the first step is to fix the curved flat plate; the second step is to irradiate one side of the curved flat plate with laser light and calculate the refractive index; the third step is to irradiate the curved flat plate again with the laser On one side of the flat plate, detect the degree of convergence and diffusion of the laser after passing through the flat plate on the other side of the curved flat plate; in the fourth step, calculate the degree of curvature and the direction of protrusion of the curved flat plate; in the fifth step, repeat the third to fourth steps for at least Once, you end up with a whole-block curvature result for the curved plate. The calculation formula of the fourth step is sinθi / sinθt=n21, wherein θi is the angle of in...

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Abstract

The invention discloses a method for detecting the curvature of a curved flat plate, comprising the following steps: the first step is to fix the curved flat plate; the second step is to irradiate one side of the curved flat plate with a laser and calculate the refractive index; the third step is to use a laser to Irradiate one side of the curved plate again, and detect the degree of convergence and diffusion of the laser after passing through the plate on the other side of the curved plate; the fourth step is to calculate the curvature of the curved plate and the direction of protrusion; the fifth step is to repeat the third step to the first At least once in four steps, the result of the whole piece of curvature of the curved plate is finally obtained. The invention adapts to the requirement of flatness inspection of related transparent flat plates including on-line inspection and the like with high precision and high efficiency.

Description

technical field [0001] The invention relates to the field of optical detection, in particular to a method for detecting the curvature of a curved flat plate. Background technique [0002] Curved screens have gradually replaced the previous flat screens, but the curved surface of the accompanying protective glass has been tested by 3D measuring instruments, flat plates and feeler gauges, etc., which have very low detection efficiency, large inspection errors, and high personnel requirements. There are many shortcomings such as high detection cost and inability to realize online detection. . Contents of the invention [0003] The present invention solves the above problems and provides a method for quickly detecting the curvature of a curved flat plate by irradiating laser light and then calculating the refraction angle. [0004] The detection method of the curvature of the curved flat plate of the present invention comprises the following steps: [0005] The first step i...

Claims

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Application Information

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IPC IPC(8): G01B11/24G01B11/30
Inventor 不公告发明人
Owner SICHUAN CCO DISPLAY TECH
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