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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 33, Iss. 24 — Dec. 15, 2008
  • pp: 2973–2975

Interferometer for precise and flexible asphere testing

Eugenio Garbusi, Christof Pruss, and Wolfgang Osten  »View Author Affiliations


Optics Letters, Vol. 33, Issue 24, pp. 2973-2975 (2008)
http://dx.doi.org/10.1364/OL.33.002973


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Abstract

A novel non-null interferometer for the precise measurement of aspheric surfaces is presented. In contrast to a classical interferometer, where only one test wavefront is used, the proposed system makes use of multiple test beams propagating under different angles through the interferometer. This allows the measurement of aspheric surfaces in a very short time, even for strong aspheres with deviations from the best-fit sphere of up to 900 μ m . The non-null test configuration implies that any additional aberrations introduced by the interferometer have to be well characterized to precisely measure the asphere. Experimental measurements of a calibrated non-null interferometer on an aspheric element with 900 μ m SAG deviation are presented.

© 2008 Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.4630) Instrumentation, measurement, and metrology : Optical inspection
(220.1250) Optical design and fabrication : Aspherics

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: September 3, 2008
Revised Manuscript: October 29, 2008
Manuscript Accepted: November 3, 2008
Published: December 9, 2008

Citation
Eugenio Garbusi, Christof Pruss, and Wolfgang Osten, "Interferometer for precise and flexible asphere testing," Opt. Lett. 33, 2973-2975 (2008)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-33-24-2973

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