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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 25 — Sep. 1, 2010
  • pp: 4746–4750

Improved technique for measuring full-field absolute phases in a common-path heterodyne interferometer

Yen-Liang Chen and Der-Chin Su  »View Author Affiliations


Applied Optics, Vol. 49, Issue 25, pp. 4746-4750 (2010)
http://dx.doi.org/10.1364/AO.49.004746


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Abstract

When an asymmetric triangle voltage signal is applied to drive an electro-optic modulator, interference signals with two groups of periodic sinusoidal segments with different frequencies are obtained. An improved method is proposed to fit these two groups of segments, and their associated phases can be determined. The absolute phase can be obtained by subtracting the initial phase from the phases of these two groups. This technique is applied to all pixels, and the full-field absolute phase measurements can be achieved. The validity of this method is demonstrated.

© 2010 Optical Society of America

OCIS Codes
(040.2840) Detectors : Heterodyne
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(230.2090) Optical devices : Electro-optical devices

ToC Category:
Optical Devices

History
Original Manuscript: May 3, 2010
Manuscript Accepted: August 2, 2010
Published: August 30, 2010

Citation
Yen-Liang Chen and Der-Chin Su, "Improved technique for measuring full-field absolute phases in a common-path heterodyne interferometer," Appl. Opt. 49, 4746-4750 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-25-4746

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