System and method for optically inspecting glass panes
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An optical inspection and glass plate technology, applied in the direction of material analysis, scientific instruments, measuring devices, etc. by optical means, can solve the problem of not being able to determine and display the optical characteristics and production quality of the plate, and other defect types or characteristics that are not suitable for glass plates, etc. problems, to improve inspection results, save costs, and save system components
Inactive Publication Date: 2009-01-14
ISRA VISION SYST AG
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However, imaging conditions that are optimal for identifying one defect type are often not suitable for determining other defect types or characteristics of the glass sheet
Therefore, it is currently not possible to determine and display the optical properties and production quality of the panels in a common system
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[0033] exist figure 1 The system 1 for the optical inspection of glass panes 2 shown in is arranged on a conveyor belt 3 designed as a conveyor, on which the glass panes 2 are held by suitable grippers 4 . The system 1 has a plurality of inspection modules 5, 6, 7 which are arranged on the conveyor belt 3 in such a way that when they pass the optical inspection system 1 on the conveyor belt 3 in the direction of the arrow P, they surround the glass to be inspected plate 2.
[0034] According to the invention, the first module 5 is a module with a grating illumination device and a transmission device in which the glass sheet 2 is inspected for optical defects in transmission to determine optical distortions / distortions. If the windshield of a motor vehicle is preferably inspected with this system 1 , the pane 2 is usually inspected in the direction of observation through which the driver of the vehicle looks when the pane 2 is installed. For windshields, this is approximately...
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Abstract
A system for the optical inspection of glass panels (2) is described, with a conveying device (3) for moving a glass panel (2), and with a first inspection module (5, 6, 7), which includes an illumination device and a camera for illuminating and photographing the glass panel (2), and with a first evaluation module (8, 9, 10, 11) for evaluating the photographs of the glass panel (2). In addition, a second inspection module (5, 6, 7) is provided, which includes an illumination device or a camera for illuminating the photograph of the glass panel (2), and it is connected with a second evaluation module (8, 9, 10, 11) for evaluating the photographs taken of the glass panel, the illumination systems and / or the cameras of the first inspection module (5, 6, 7) and the second inspection module (5, 6, 7) having different designs and / or being located in different places relative to the glass panel (2), which is moved past the inspection modules (5, 6, 7) via the conveying device. The present invention also relates to a method carried out using this system (1).
Description
technical field [0001] The present invention relates to a system and method for optical inspection of glass sheets. For this purpose, a transport device for moving the glass pane and an inspection module with an illumination device and a camera for illuminating and photographing the glass pane and connected to an evaluation module for analyzing the captured images of the glass pane are provided. . The invention is particularly suitable for inspecting curved or curved glass panes, for example installed in vehicles. Background technique [0002] In industrial processes in which glass sheets are applied, such as car windshields or other windows, the quality of the glass sheets has to be checked after production and before they are installed in the car body. Various methods and systems are known for this purpose, which are able, for example, to determine optical defects on large-area panes, to determine imaging properties of glass panes, to measure the thickness of panes or to...
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