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Proceedings Paper

Theory and practice of a fringe-counting thickness-uniformity test device for IR flats, domes, and conformal windows
Author(s): Daniel D. Barber; David J. Erickson
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Paper Abstract

A technique for combining Newton fringe interferometry with scanning methods to characterize unique optical elements is discussed. The approach uses a converging beam as a probe and observes the Newton fringe pattern formed by the interaction between the front and rear surface reflections of the optic under test. The result is a direct measurement of the optical thickness profile of the component. The technique is well suited to the characterization of windows, domes, conformal windows, and mild corrector plates.

Paper Details

Date Published: 15 December 1992
PDF: 12 pages
Proc. SPIE 1776, Interferometry: Surface Characterization and Testing, (15 December 1992); doi: 10.1117/12.139233
Show Author Affiliations
Daniel D. Barber, OCA Applied Optics, Inc. (United States)
David J. Erickson, OCA Applied Optics, Inc. (United States)

Published in SPIE Proceedings Vol. 1776:
Interferometry: Surface Characterization and Testing
Katherine Creath; John E. Greivenkamp, Editor(s)

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