1 September 1993 Theory and applications of a surface inspection technique using double-pass retroreflection
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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.
Rodger L. Reynolds, Rodger L. Reynolds, Frank Karpala, Frank Karpala, Donald A. Clarke, Donald A. Clarke, Omer L. Hageniers, Omer L. Hageniers, } "Theory and applications of a surface inspection technique using double-pass retroreflection," Optical Engineering 32(9), (1 September 1993). https://doi.org/10.1117/12.143938 . Submission:

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