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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 37, Iss. 19 — Oct. 1, 2012
  • pp: 3957–3959

Laser speckle imaging using a consumer-grade color camera

Owen Yang and Bernard Choi  »View Author Affiliations

Optics Letters, Vol. 37, Issue 19, pp. 3957-3959 (2012)

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Laser speckle imaging (LSI) is a noninvasive optical imaging technique able to provide wide-field two-dimensional maps of moving particles. Raw laser speckle images are typically taken with a scientific-grade monochrome camera. We demonstrate that a digital single-lens reflex (dSLR) camera with a Bayer filter is able to provide similar sensitivity despite taking information only from a specific pixel color. Here we demonstrate the effect of changing three primary dSLR exposure settings (i.e., aperture, exposure time/shutter speed, and gain/sensitivity (ISO)) on speckle contrast. In addition, we present data from an in vivo reactive hyperemia experiment that demonstrates the qualitative similarity in blood-flow dynamics visualized with a color dSLR and a scientific-grade monochrome camera.

© 2012 Optical Society of America

OCIS Codes
(120.3890) Instrumentation, measurement, and metrology : Medical optics instrumentation
(120.6150) Instrumentation, measurement, and metrology : Speckle imaging

ToC Category:
Spectral Imaging Sensors

Original Manuscript: June 28, 2012
Revised Manuscript: August 14, 2012
Manuscript Accepted: August 22, 2012
Published: September 18, 2012

Owen Yang and Bernard Choi, "Laser speckle imaging using a consumer-grade color camera," Opt. Lett. 37, 3957-3959 (2012)

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  1. A. F. Fercher and J. D. Briers, Opt. Commun. 37, 326 (1981). [CrossRef]
  2. D. A. Boas and A. K. Dunn, J. Biomed. Opt. 15, 011109 (2010). [CrossRef]
  3. S. J. Kirkpatrick, D. D. Duncan, R. K. Wang, and M. T. Hinds, J. Opt. Soc. Am. A 24, 3728 (2007). [CrossRef]
  4. O. Yang, D. Cuccia, and B. Choi, J. Biomed. Opt. 16, 016009 (2011). [CrossRef]
  5. W. J. Tom, A. Ponticorvo, and A. K. Dunn, IEEE Trans. Med. Imaging 27, 1728 (2008). [CrossRef]
  6. J. C. Ramirez-San-Juan, R. Ramos-Garcia, I. Guizar-Iturbide, G. Martinez-Niconoff, and B. Choi, Opt. Express 16, 3197 (2008). [CrossRef]
  7. J. Qiu, P. Li, W. Luo, J. Wang, H. Zhang, and Q. Luo, J. Biomed. Opt. 15, 016003 (2010). [CrossRef]
  8. A. K. Dunn, Ann. Biomed. Eng. 40, 367 (2012). [CrossRef]
  9. A. B. Parthasarathy, E. L. Weber, L. M. Richards, D. J. Fox, and A. K. Dunn, J. Biomed. Opt. 15, 066030 (2010). [CrossRef]
  10. Y. C. Huang, N. Tran, P. R. Shumaker, K. Kelly, E. V. Ross, J. S. Nelson, and B. Choi, Lasers Surg. Med. 41, 563(2009). [CrossRef]
  11. D. Coffin, “Decoding raw digital photos in Linux” (2012), http://www.cybercom.net/~dcoffin/dcraw/ .
  12. A. G. Frederick Ayers, Danny Kuo, A. J. Durkin, and D. Cuccia, Proc. SPIE 6870, 687007 (2008). [CrossRef]

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