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Optics Letters

Optics Letters


  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 9 — May. 1, 2007
  • pp: 1063–1065

Determining parent radius and conic of an off-axis segment interferometrically with a spherical reference wave

Ying Pi and Patrick J. Reardon  »View Author Affiliations

Optics Letters, Vol. 32, Issue 9, pp. 1063-1065 (2007)

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A simple interferometric method is presented for determining the parent radius of curvature (ROC) and conic constant (CC) of a conic surface. This method compares the test surface with a spherical reference wavefront having a ROC equal to the local sagittal, medial, or tangential ROC. The measured wavefront aberrations, particularly the astigmatism and coma, and local radii are used to determine the parent ROC and CC. This method does not require null optics or knowledge of the surface coordinate where the measurement is made.

© 2007 Optical Society of America

OCIS Codes
(080.1010) Geometric optics : Aberrations (global)
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.3940) Instrumentation, measurement, and metrology : Metrology
(120.6650) Instrumentation, measurement, and metrology : Surface measurements, figure
(220.4840) Optical design and fabrication : Testing

ToC Category:
Geometrical optics

Original Manuscript: October 2, 2006
Revised Manuscript: February 1, 2007
Manuscript Accepted: February 3, 2007
Published: April 3, 2007

Ying Pi and Patrick J. Reardon, "Determining parent radius and conic of an off-axis segment interferometrically with a spherical reference wave," Opt. Lett. 32, 1063-1065 (2007)

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