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Method for measuring mechanical stress in optically transparent materials such as glass or plastic film by taking image of the intensity components using video camera and evaluating image and change in intensity components
Method for measuring mechanical stress in optically transparent materials such as glass or plastic film by taking image of the intensity components using video camera and evaluating image and change in intensity components
Polarizing directions of analyzers (3,4) are arranged vertically to each other. An image of intensity component of the respective polarization component determined by the analyzers (3,4) is imaged on a diffuser (5). A video camera (6) takes an image of the intensity components and the image is evaluated and a change in the intensity components follows a measure for a stress in the material (7). An Independent claim is included for: (a) a device implementing the method of measuring mechanical stress
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