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Aspheric surface calibrator

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1364/AO.20.003367
AuthorSearch for: 1
Affiliation
  1. National Research Council of Canada
FormatText, Article
Abstract
A new type of aspheric surface calibrator has been developed at the National Research Council of Canada. It employs a nonmechanical contact technique for measuring rotationally symmetrical uncoated concave optical surfaces which depart from a sphere by as much as 0.5 mm with a precision of 0.3 μm. Using two precise air bearings for providing rotations about two mutually perpendicular axes, a focused laser beam is scanned across the surface under test. A fringe counting process measures the difference in sag between the surface shape and some reference sphere. Two surfaces, one spherical and the other ellipsoidal, were measured to illustrate the practicality of such an instrument.
Publication date
PublisherOSA Publishing
In
  • Applied Optics 20, no. 19: 3367–3377.
LanguageEnglish
Peer reviewedYes
NRC numberNRC-19465
NRC-INMS-3384
NPARC number8898984
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Record identifier17d115ca-d945-4c65-8258-a0cf88832812
Record created2009-04-22
Record modified2020-03-13
Date modified: