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Optical Engineering

Optical Inspection Of Manufactured Glass Using Adaptive Fourier Filtering
Author(s): R. Cormack; K. M. Johnson; Lin Zhang; W. Thomas Cathey
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Paper Abstract

Most of the defects present in manufactured glass are caused by rare explosions of hot jars and bottles on the assembly line. These explosions create particles of flying glass that may stick to the inside bottoms of other jars on the line. In this paper we present experimental results of a prototype optoelectronic inspection system that detects submillimeter stuck-glass defects. In the system described, we use a two-dimensional spatial light modulator to create in real time a unique mask for each glass jar inspected. This allows us to compensate for variations in acceptable features on the bottoms of the jars such as mold marks and lettering while detecting the presence of unacceptable features such as stuck-glass defects.

Paper Details

Date Published: 1 May 1988
PDF: 7 pages
Opt. Eng. 27(5) doi: 10.1117/12.7976684
Published in: Optical Engineering Volume 27, Issue 5
Show Author Affiliations
R. Cormack, University of Colorado at Boulder (United States)
K. M. Johnson, University of Colorado at Boulder (United States)
Lin Zhang, University of Colorado at Boulder (United States)
W. Thomas Cathey, University of Colorado at Boulder (United States)


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