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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 14 — May. 10, 2014
  • pp: 3069–3074

Determination of the surface form error of a spherical mirror with phase shifting Sagnac interferometer

Sanjib Chatterjee and Y. Pavan Kumar  »View Author Affiliations


Applied Optics, Vol. 53, Issue 14, pp. 3069-3074 (2014)
http://dx.doi.org/10.1364/AO.53.003069


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Abstract

A polarization Sagnac interferometer (SI) is used to produce two laterally separated, identical, convergent emergent beams with linear orthogonal polarizations. The emergent p-polarized and s-polarized beams converge toward their respective focal points. The test and reference spherical mirrors are placed at confocal positions with respect to the s and p focal points so as to normally reflect back the test and reference beams through the SI that recombines the test and reference waves. Polarization phase shifting interferometry is applied to obtain the surface form error of the test surface with respect to the reference surface. A two-step measurement procedure eliminates the system aberrations. Results obtained for a concave spherical test surface with respect to a convex spherical reference surface are presented. The optical configuration is relatively less susceptible to external mechanical vibration.

© 2014 Optical Society of America

OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(160.2750) Materials : Glass and other amorphous materials

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: February 25, 2014
Manuscript Accepted: April 1, 2014
Published: May 8, 2014

Citation
Sanjib Chatterjee and Y. Pavan Kumar, "Determination of the surface form error of a spherical mirror with phase shifting Sagnac interferometer," Appl. Opt. 53, 3069-3074 (2014)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-53-14-3069

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