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Proceedings Paper

In Process Optical Measurement Of Micro Profile On Cold Rolled Steel Plates
Author(s): Klaus Weber
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Paper Abstract

A new sensor for measurement of micro profiles of fast running surfaces was developed, in which a fine Laser spot is created at the surface and the reflected light is received by photodiodes, arranged along an arc of 140 degrees perpendicular to the surface. These photodiodes are connected with resistors in the known manner of PSD's to realise an angle sensitive array to win the averaged angle of reflection of the asked surface-elements point by point. By calculating the local inclinations of these surface-elements and by integrating these values the micro profile is created, and by known calculations roughness parameters like Ra are determined. The distance of measuring points is 10 µm at a speed of the metal sheet up to 20 m/sec., thus the frequency of single measurements is 2 MHz. Results are shown and limitations are discussed.

Paper Details

Date Published: 10 March 1989
PDF: 6 pages
Proc. SPIE 1012, In-Process Optical Measurements, (10 March 1989); doi: 10.1117/12.949345
Show Author Affiliations
Klaus Weber, Erwin Sick GmbH (Germany)

Published in SPIE Proceedings Vol. 1012:
In-Process Optical Measurements
Kenneth H. Spring, Editor(s)

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