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Optical Engineering

Theory and applications of a surface inspection technique using double-pass retroreflection
Author(s): Rodger L. Reynolds; Frank Karpala; Donald A. Clarke; Omer L. Hageniers
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Paper Abstract

A historic perspective to the development of the D SIGHT™ surface inspection technique from a laboratory curiosity to a mature technology is presented. A brief description of the experimental process that led to the discovery of the phenomenon is followed by a discussion of how the optical process functions and how varying the hardware configuration affects the system output. Illustrations of a wide variety of surfaces, imaged using double-pass retroreflection, are used to show its evolution from a purely optical, visual enhancement technique to a computer-based, image acquisition system, which, through digital image processing, enables a user to quantify, annotate, and record the quality of a given surface. Possible directions for future development are discussed briefly.

Paper Details

Date Published: 1 September 1993
PDF: 8 pages
Opt. Eng. 32(9) doi: 10.1117/12.143938
Published in: Optical Engineering Volume 32, Issue 9
Show Author Affiliations
Rodger L. Reynolds, Diffracto Ltd. (Canada)
Frank Karpala, Diffracto Limited (Canada)
Donald A. Clarke, Diffracto Limited (Canada)
Omer L. Hageniers, Diffracto Ltd. (Canada)

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