Introduction to the surface distortion measurement device for resin and film, "SurfTRiDY."
The distortion of the surface that was observed under the fluorescent light can be quantitatively measured as a pattern.
● It is possible to measure the minute surface distortions that were previously observed by holding them up to fluorescent lights, such as films, glass, plastics, and painted surfaces. ● Surface distortions that were traditionally assessed through sensory inspection are quantitatively displayed as inclination angle distribution, curvature distribution, or displacement amounts from a three-point gauge. ● High-sensitivity measurements (detecting changes in surface tilt of 1 mrad) are possible. ● Map display, CG display, and CSV file output are available.
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■Measurement Principle When observing the mirror image of stripes projected onto the surface of a reflective object on a screen, the stripes appear distorted according to the surface's deformation (zebra pattern observation). The amount of distortion is related to the gradient of the deformation shape (the slope of the surface). By determining the coordinates of corresponding points on the screen for every point on the object's surface, we quantify the amount of stripe distortion and measure the distortion pattern. ■Measurement Method Stripes with varying periods and a moving multi-slit pattern are sequentially projected onto the screen, and the mirror image reflected on the measurement target surface is observed using a TV camera. These images are analyzed using the SurfTRiDY method and converted into a pattern of slope (gradient). Furthermore, this is differentiated to obtain the curvature pattern.
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■Purpose Observation, recording, evaluation, and inspection of surface distortion on mirror or semi-mirror surfaces. <Examples of subjects> Press panels, painted panels, glass, plastic, films, etc. (Note) For surfaces that are dull, applying "oil" may enhance "mirror quality" and make measurement possible. ■Surface Distortion Pattern Measurement Examples Steel plate press panel Stainless steel fittings (with punch holes and dents; 30mm×100mm) Stainless steel plate (with distortion and scratches; 200mm×300mm) Concave mirror (50mmΦ×3 pieces; curvature radius = 3,000mm, ∞, 30,000mm) CD case (transparent plastic; 125mm×140mm)
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