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Proceedings Paper

Characterizing Birefringent Crystal Wafers With A Scanning Laser Microscope
Author(s): W. E. Wolf
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Paper Abstract

A near-real-time scanning laser microscope has been developed to assist in the characterization of crystal wafers used to produce integrated optical devices. This instrument is employed in an experimental program to correlate crystal anomalies with integrated device performance. A combination of polarization and masking techniques is used to generate images of higher contrast ratio and larger useful field of view than obtainable with conventional microscopy techniques. The raster-scanning beam design allows rapid image formation, which speeds the inspection operation. The addition of confocal optics increases the flexibility of the instrument and expands the useful applications to include biological and integrated structure characterization problems. Automation techniques are used to minimize the time required to inspect a given sample. A computer system prepares summarizing data displays that contain the key parameters describing the sample.

Paper Details

Date Published: 21 March 1989
PDF: 9 pages
Proc. SPIE 1004, Automated Inspection and High-Speed Vision Architectures II, (21 March 1989); doi: 10.1117/12.948985
Show Author Affiliations
W. E. Wolf, E. I. du Pont de Nemours & Co. (Inc.) (United States)

Published in SPIE Proceedings Vol. 1004:
Automated Inspection and High-Speed Vision Architectures II
Michael J. W. Chen, Editor(s)

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