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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 13 — May. 1, 1998
  • pp: 2579–2588

Absolute figure measurements with a liquid-flat reference

Ian Powell and Emmanuelle Goulet  »View Author Affiliations


Applied Optics, Vol. 37, Issue 13, pp. 2579-2588 (1998)
http://dx.doi.org/10.1364/AO.37.002579


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Abstract

We describe a variation of the liquid-flat technique for determining the absolute flatness of a 240-mm-diameter optical surface to an accuracy better than 1/100λ in both its horizontal (three-point support) and vertical orientations. Using the appropriate mathematics to calculate the surface deformation of a disk due to gravity, we achieved verification of the method by comparing measurements carried out on a pair of optical flats and a liquid reference surface.

© 1998 Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(220.4840) Optical design and fabrication : Testing

History
Original Manuscript: May 12, 1997
Revised Manuscript: July 10, 1997
Published: May 1, 1998

Citation
Ian Powell and Emmanuelle Goulet, "Absolute figure measurements with a liquid-flat reference," Appl. Opt. 37, 2579-2588 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-13-2579

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