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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 45, Iss. 26 — Sep. 10, 2006
  • pp: 6694–6701

Development of a line-scan CCD-based fringe tracker for optical interferometry

Agustí Pintó and Ferran Laguarta  »View Author Affiliations


Applied Optics, Vol. 45, Issue 26, pp. 6694-6701 (2006)
http://dx.doi.org/10.1364/AO.45.006694


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Abstract

Traditional high-precision optical techniques, such as interferometry, are in ever-greater demand for noncontrolled environments. This is the case for the UPC-ZEBRA, a large-aperture interferometer that was built to measure vertical discontinuities (i.e., piston errors) in segmented mirrors. The large mechanical systems used to drive the interferometer to the different measurement positions generate perturbations that are highly incompatible with the expected piston measurements on the nanometer scale. We introduce a new system based on a line-scan CCD to track interference fringes. The error signal obtained from this fringe tracker has been used in a closed-loop control system to actively stabilize the interferometer. The perturbation has been attenuated by a factor of 1 / 200 .

© 2006 Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.3930) Instrumentation, measurement, and metrology : Metrological instrumentation

History
Original Manuscript: November 28, 2005
Revised Manuscript: March 8, 2006
Manuscript Accepted: April 5, 2006

Citation
Agustí Pintó and Ferran Laguarta, "Development of a line-scan CCD-based fringe tracker for optical interferometry," Appl. Opt. 45, 6694-6701 (2006)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-45-26-6694


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References

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