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Proceedings Paper

Design and Operation of a Real Time Interferometer Working at 3.8 µm
Author(s): K. Prettyjohns; S. DeVore; E. Dereniak; J. Wyant
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Paper Abstract

A digital heterodyne interferometer has been designed and constructed to operate at a wavelength of 3.8 μm. The instrument is intended for use in measuring wavefront figure error due to thickness variations in dielectric coatings applied to infrared optics. A 32 x 64 element PtSi infrared CCD detector array is used together with digital processing and graphics display on a desktop microcomputer. Preliminary results have shown a wavefront measurement repeatability of less than λ/50.

Paper Details

Date Published: 15 November 1983
PDF: 6 pages
Proc. SPIE 0429, Precision Surface Metrology, (15 November 1983); doi: 10.1117/12.936352
Show Author Affiliations
K. Prettyjohns, University of Arizona (United States)
S. DeVore, University of Arizona (United States)
E. Dereniak, University of Arizona (United States)
J. Wyant, University of Arizona (United States)

Published in SPIE Proceedings Vol. 0429:
Precision Surface Metrology
James C. Wyant, Editor(s)

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