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Proceedings Paper

Detecting and characterizing small voids in mostly diffuse materials
Author(s): Norman Wittels; Tahar El-Korchi; Yinhong Li; Michael A. Gennert
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Paper Abstract

The design of a high-speed range camera capable of providing on-the-fly range map assessment of printed circuit boards is described. The system uses an HeNe laser and time- space coding to achieve 180,000 range measurements per second. System spatial resolution is 0.001 X 0.001 in., and the range resolution is 0.00066 in., with a working depth of range of 3/8 in. We discuss the electro-optic design and present results from various imaging experiments using the instrument.

Paper Details

Date Published: 6 January 1994
PDF: 9 pages
Proc. SPIE 2348, Imaging and Illumination for Metrology and Inspection, (6 January 1994); doi: 10.1117/12.198832
Show Author Affiliations
Norman Wittels, Worcester Polytechnic Institute (United States)
Tahar El-Korchi, Worcester Polytechnic Institute (United States)
Yinhong Li, Worcester Polytechnic Institute (United States)
Michael A. Gennert, Worcester Polytechnic Institute (United States)

Published in SPIE Proceedings Vol. 2348:
Imaging and Illumination for Metrology and Inspection
Donald J. Svetkoff, Editor(s)

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