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Applied Optics

Applied Optics


  • Editor: Jospeh N. Mait
  • Vol. 48, Iss. 3 — Jan. 20, 2009
  • pp: 560–565

Distortion compensation in interferometric testing of mirrors

Brian M. Robinson and Patrick J. Reardon  »View Author Affiliations

Applied Optics, Vol. 48, Issue 3, pp. 560-565 (2009)

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We present a method to compensate for the imaging distortion encountered in interferometric testing of mirrors, which is introduced by interferometer optics as well as from geometric projection errors. Our method involves placing a mask, imprinted with a regular square grid, over the mirror and finding a transformation that relates the grid coordinates to coordinates in the base plane of the parent surface. This method can be used on finished mirrors since no fiducials have to be applied to the surfaces. A critical step in the process requires that the grid coordinates be projected onto the mirror base plane before the regression is performed. We apply the method successfully during a center-of-curvature null test of an F / 2 off-axis paraboloid.

© 2009 Optical Society of America

OCIS Codes
(080.2720) Geometric optics : Mathematical methods (general)
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.6650) Instrumentation, measurement, and metrology : Surface measurements, figure
(220.1250) Optical design and fabrication : Aspherics

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: July 28, 2008
Revised Manuscript: December 4, 2008
Manuscript Accepted: December 10, 2008
Published: January 15, 2009

Brian M. Robinson and Patrick J. Reardon, "Distortion compensation in interferometric testing of mirrors," Appl. Opt. 48, 560-565 (2009)

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