A retrosphere is a convenient element to use in interferometric optical tests, but can cause ambiguities in the interferogram due to Fresnel diffraction. This paper evaluates these effects and presents an alternative retroreflector design concept.
© 2010 OSA, SPIE
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(220.0220) Optical design and fabrication : Optical design and fabrication
(220.4840) Optical design and fabrication : Testing
J. M. Rodgers, "Considerations for Selecting a Retrosphere in Interferometric Optical Testing of Objectives," in International Optical Design Conference and Optical Fabrication and Testing , OSA Technical Digest (CD) (Optical Society of America, 2010), paper ITuD1.