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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 34, Iss. 12 — Jun. 15, 2009
  • pp: 1750–1752

Phase contrast coherence microscopy based on transverse scanning

Michael Pircher, Bernhard Baumann, Erich Götzinger, Harald Sattmann, and Christoph K. Hitzenberger  »View Author Affiliations


Optics Letters, Vol. 34, Issue 12, pp. 1750-1752 (2009)
http://dx.doi.org/10.1364/OL.34.001750


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Abstract

We present what we believe to be a novel approach to measuring optical path length differences with a precision of a few nanometers. The instrument is based on transverse scanning or en-face optical coherence tomography. Owing to the fast motion of the scanning beam over the sample, excellent phase stability in the transverse direction is achieved. Hence, phase changes caused by the varying optical path lengths within the sample arm occur with high frequency in the fast scanning direction. These changes are well separated from the rather slow phase changes introduced by jitter within the interferometer and can therefore be measured. The en-face imaging speed of the instrument is 40 fps ( 520 × 200   pixels ) . The measured precision of the method to detect small changes in optical path lengths was 3   nm .

© 2009 Optical Society of America

OCIS Codes
(110.4500) Imaging systems : Optical coherence tomography
(170.0180) Medical optics and biotechnology : Microscopy
(180.3170) Microscopy : Interference microscopy
(350.5030) Other areas of optics : Phase

ToC Category:
Imaging Systems

History
Original Manuscript: February 27, 2009
Revised Manuscript: April 14, 2009
Manuscript Accepted: April 30, 2009
Published: June 2, 2009

Virtual Issues
Vol. 4, Iss. 8 Virtual Journal for Biomedical Optics

Citation
Michael Pircher, Bernhard Baumann, Erich Götzinger, Harald Sattmann, and Christoph K. Hitzenberger, "Phase contrast coherence microscopy based on transverse scanning," Opt. Lett. 34, 1750-1752 (2009)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-34-12-1750


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