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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 6, Iss. 1 — Jan. 3, 2011

Expansion of the dynamic range of statistical interferometry and its application to extremely short- to long-term plant growth monitoring

Koichi Kobayashi and Hirofumi Kadono  »View Author Affiliations


Applied Optics, Vol. 49, Issue 32, pp. 6333-6339 (2010)
http://dx.doi.org/10.1364/AO.49.006333


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Abstract

In this study, we propose a method to expand the dynamic range of expansion or strain measurement using statistical interferometry. Statistical interferometry is a very accurate interferometric technique that is applicable to practical rough surface objects [ Opt. Lett. 16, 883 (1991); J. Opt. Soc. Am. A 18, 1267 (2001)]. It is based on the statistical stability of a fully developed speckle field and was successfully applied to measure the growth of plants in our previous study [ Environ. Exp. Bot. 64, 314 (2008); J. For. Res. 12, 393 (2007)]. However, the measurable range of the expansion of the object was restricted to less than one wavelength of the light used. Improvement of the dynamic range is confirmed experimentally in this work by introducing a large expansion up to 300 μm while keeping the precision of measurement high. Next, the improved system is applied to monitor plant growth from the subnanometric scale to several hundreds of micrometers under some environmental conditions. These features of the method make it especially worthwhile in botanical and agricultural studies.

© 2010 Optical Society of America

OCIS Codes
(030.6140) Coherence and statistical optics : Speckle
(030.6600) Coherence and statistical optics : Statistical optics
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.5050) Instrumentation, measurement, and metrology : Phase measurement

ToC Category:
Coherence and Statistical Optics

History
Original Manuscript: February 4, 2010
Revised Manuscript: June 13, 2010
Manuscript Accepted: September 19, 2010
Published: November 9, 2010

Virtual Issues
Vol. 6, Iss. 1 Virtual Journal for Biomedical Optics

Citation
Koichi Kobayashi and Hirofumi Kadono, "Expansion of the dynamic range of statistical interferometry and its application to extremely short- to long-term plant growth monitoring," Appl. Opt. 49, 6333-6339 (2010)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ao-49-32-6333

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