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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 47, Iss. 12 — Apr. 20, 2008
  • pp: 2053–2060

Multiple-wavelength digital holographic interferometry using tunable laser diodes

Atsushi Wada, Makoto Kato, and Yukihiro Ishii  »View Author Affiliations


Applied Optics, Vol. 47, Issue 12, pp. 2053-2060 (2008)
http://dx.doi.org/10.1364/AO.47.002053


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Abstract

Here we present multiple-wavelength digital holographic interferometry with a wide measurement range using laser diodes. Small wavelength differences can be easily realized by the wavelength tuning of laser diodes with injection current controls. A contour map of an object with a wide measurement range and a high sensitivity is demonstrated by combining a few contour maps with several measurement sensitivities. Synthetic wavelengths are calibrated using a known height difference. This alleviates the need to have high precise knowledge of the recording wavelengths. The synthetic wavelengths ranged from 3 mm for high measurement sensitivity to 4 cm for wide measurement range. An rms error of 35 μm for a 1 cm height measurement is shown. The measured profile of holographic interferometry agrees with a standard stylus instrument.

© 2008 Optical Society of America

OCIS Codes
(090.2880) Holography : Holographic interferometry
(120.2830) Instrumentation, measurement, and metrology : Height measurements
(120.2880) Instrumentation, measurement, and metrology : Holographic interferometry
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(140.2020) Lasers and laser optics : Diode lasers
(090.1995) Holography : Digital holography

ToC Category:
Holography

History
Original Manuscript: November 9, 2007
Revised Manuscript: March 17, 2008
Manuscript Accepted: March 18, 2008
Published: April 15, 2008

Citation
Atsushi Wada, Makoto Kato, and Yukihiro Ishii, "Multiple-wavelength digital holographic interferometry using tunable laser diodes," Appl. Opt. 47, 2053-2060 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-12-2053

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