Abstract

An efficient system for retroreflective grating generation and analysis has been constructed to measure the derivative and the contour of specular surfaces. In this system, a new optical configuration has been provided to generate and capture a grating image with a retroreflective screen. Tests show that the system can detect indents and outdents with a maximum depth of less than 10 μm. The method can be developed for automated industrial inspection and machine vision.

© 1998 Optical Society of America

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