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Proceedings Paper

Considerations for selecting a retrosphere in interferometric optical testing of objectives
Author(s): J. Michael Rodgers
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Paper Abstract

A retrosphere (either a convex ball or a concave mirror) is a convenient element to use in the interferometric optical test of an objective. However, under some conditions the retrosphere can cause ambiguities in the interferogram due to the effects of Fresnel diffraction. This paper provides diffracted beam propagation analysis and results showing the magnitude of these effects for a range of system f- numbers and retrosphere radii. The paper also presents an alternative retroreflector design concept that avoids the ambiguities.

Paper Details

Date Published: 9 September 2010
PDF: 13 pages
Proc. SPIE 7652, International Optical Design Conference 2010, 765216 (9 September 2010); doi: 10.1117/12.868876
Show Author Affiliations
J. Michael Rodgers, Optical Research Associates (United States)


Published in SPIE Proceedings Vol. 7652:
International Optical Design Conference 2010
Julie Bentley; Anurag Gupta; Richard N. Youngworth, Editor(s)

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