OSA's Digital Library

Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 43, Iss. 24 — Aug. 20, 2004
  • pp: 4643–4651

Lenticular Array for Spatial Filtering Velocimetry of Laser Speckles from Solid Surfaces

Michael L. Jakobsen and Steen G. Hanson  »View Author Affiliations


Applied Optics, Vol. 43, Issue 24, pp. 4643-4651 (2004)
http://dx.doi.org/10.1364/AO.43.004643


View Full Text Article

Acrobat PDF (321 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

We present a low-cost optical design for the detection of speckle translation, which can provide measures of in-plane translation or the rotation of a solid structure. A nonspecular target surface is illuminated with coherent light. The scattered light is propagated through an optical arrangement that has been particularly designed for the type of mechanical measurand for which the sensor is intended. The dynamics of the speckle field that arise from the target surface are projected onto a lenticular array, constituting a narrow spatial bandpass filter for the speckle spectrum. The filter provides access to the full phase information of the temporal quasi-sinusoidal intensity output; thus differential arrangements of photodetectors can provide suppression of low-frequency oscillations and higher harmonics, and the direction of the speckle translation can be determined. The spatial filter of the sensor is characterized, and the precision of the sensor when it is integrated with an electronic zero-crossing-detection processor is investigated. The best measurement accuracy obtained at constant velocity is 1% at 1.6-mm translation; the relative standard deviation decreases with the square root of the distance traveled.

© 2004 Optical Society of America

OCIS Codes
(070.6110) Fourier optics and signal processing : Spatial filtering
(120.7250) Instrumentation, measurement, and metrology : Velocimetry
(350.3950) Other areas of optics : Micro-optics

Citation
Michael L. Jakobsen and Steen G. Hanson, "Lenticular Array for Spatial Filtering Velocimetry of Laser Speckles from Solid Surfaces," Appl. Opt. 43, 4643-4651 (2004)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-43-24-4643


Sort:  Author  |  Year  |  Journal  |  Reset

References

  1. T. Asakura and N. Takai, “Dynamic laser speckles and their application to velocity measurements of a diffuse object,” Appl. Phys. 25, 179–194 (1981).
  2. Y. Aizu and T. Asakura, “Principle and development of spatial filter velocimetry,” Appl. Phys. B 43, 209–224 (1987).
  3. B. E. A. Saleh, “Speckle correlation measurement of the velocity of a small rotating rough surface,” Appl. Opt. 14, 2344–2346 (1975).
  4. B. Rose, H. Imam, S. G. Hanson, H. T. Yura, and R. S. Hansen, “Laser-speckle angular-displacement sensor: theoretical and experimental study,” Appl. Opt. 37, 2119–2129 (1998).
  5. J. T. Ator, “Image velocity sensing by optical correlation,” Appl. Opt. 5, 1325–1331 (1966).
  6. T. Ushizaka and T. Asakura, “Measurements of flow velocity in a microscopic region using a transmission grating,” Appl. Opt. 22, 1870–1874 (1983).
  7. Y. Aizu, T. Ushizaka, and T. Asakura, “Measurements of the flow velocity in a microscopic region using a transmission grating: elimination of directional ambiguity,” Appl. Opt. 24, 636–640 (1985).
  8. T. Ushizaka, Y. Aizu, and T. Asakura, “Measurements of velocity using a lenticular grating,” Appl. Phys. B 39, 97–106 (1986).
  9. U. Schnell, J. Piot, and R. Dändliker, “Detection of movement with laser speckle patterns: statistical properties,” J. Opt. Soc. Am. A 15, 207–216 (1998).
  10. H. T. Yura, B. Rose, and S. G. Hanson, “Dynamic laser speckle in complex ABCD optical systems,” J. Opt. Soc. Am. A 15, 1160–1166 (1998).
  11. H. T. Yura and S. G. Hanson, “Optical beam propagation through complex optical systems,” J. Opt. Soc. Am. A 4, 1931–1948 (1987).
  12. J. W. Goodman, “Statistical properties of laser speckle patterns,” in Laser Speckle and Related Phenomena, J. C. Dainty, ed. (Springer-Verlag, Berlin, 1984), pp. 9–75.
  13. J. W. Goodman, Introduction to Fourier Optics (McGraw-Hill, New York, 1968), pp. 4–29.

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.


« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited