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Perspective distortion inspecting equipment and method of translucent panel

A technology of perspective deformation and detection device, which is applied in the direction of measurement device, optical device, material analysis by optical means, etc., can solve the problems of complex structure and long-term calculation of detection device.

Inactive Publication Date: 2007-10-10
NIPPON SHEET GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, there is a problem that it takes a long time to calculate the judgment, and the structure of the detection device for perspective deformation is relatively complicated.

Method used

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  • Perspective distortion inspecting equipment and method of translucent panel
  • Perspective distortion inspecting equipment and method of translucent panel
  • Perspective distortion inspecting equipment and method of translucent panel

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Embodiment Construction

[0027] best practice

[0028] Hereinafter, the perspective deformation detection device in the preferred embodiment of the present invention will be described.

[0029] FIG. 1 shows a perspective distortion detection device 1 for detecting perspective distortion of a translucent panel 2 . The translucent panel 2 is, for example, a curved glass panel such as a windshield of an automobile. The perspective deformation detection device 1 includes: an LED panel 3 as a display device, a CCD camera 4 as a photographing device, a placement table 5 , a computer 6 , an LED display control unit 7 , a positioning control unit 8 and an image processing device 9 . The glass panel 2 is arranged between the CCD camera 4 and the LED panel 3 . The CCD camera 4 directly photographs the LED 10 of the LED panel 3 , or indirectly photographs the LED 10 of the LED panel 3 through the glass panel.

[0030]FIG. 2 shows the glass panel 2 viewed from the driver's eye projection point P0 (see FIG. 1 )...

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PUM

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Abstract

Perspective distortion inspecting equipment (1) comprising an LED plate (3), a CCD camera (4), and a computer (6). The LED plate has a plurality of target marks (T) inclining at 45 DEG . Under a state where a panel (2) is arranged between the LED plate and the CCD camera, the computer lights the target marks one by one and the lighted target mark is photographed by the CCD camera. The computer calculates a perspective distortion (R) based on the distance between a virtual line (K) connecting the images on the LED at the opposite ends of each target mark and the image of the LED located in the middle of the target mark.

Description

technical field [0001] The invention relates to a perspective deformation detection device and a detection method of a translucent panel. Background technique [0002] Recently, translucent glass panels with complex curved shapes are installed on the windows of automobiles in order to meet demands such as improved aerodynamic characteristics. The driver of the car sees the scenery and objects outside the car through the glass panel. The scenery or objects seen through the curved part of the car panel will appear deformed according to the degree of curvature of the curved part. This distortion is called perspective distortion. If the perspective distortion exceeds the allowable value, it will cause discomfort to the driver. [0003] Therefore, before the glass panel is attached to the window of the automobile, the degree of curvature at each position on the glass panel, that is, the perspective distortion is quantitatively detected. In the conventional first detection met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/24G01N21/896
CPCG01N21/958G01B11/25G01N2021/9586G01N2201/0626
Inventor 松下嘉光
Owner NIPPON SHEET GLASS CO LTD