OSA's Digital Library

Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 23, Iss. 5 — Mar. 1, 1998
  • pp: 319–321

Using dynamic low-coherence interferometry to image Brownian motion within highly scattering media

D. A. Boas, K. K. Bizheva, and A. M. Siegel  »View Author Affiliations


Optics Letters, Vol. 23, Issue 5, pp. 319-321 (1998)
http://dx.doi.org/10.1364/OL.23.000319


View Full Text Article

Acrobat PDF (299 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

Dynamic low-coherence interferometry was used to measure Brownian motion of submicrometer particles within highly scattering media. Strong rejection of multiply scattered light was obtained by combination of a coherence gate with a confocal microscope, thus allowing particle characterization methods generally reserved for optically dilute materials to be applied to optically concentrated suspensions. The Brownian diffusion coefficient of highly scattering media was determined with an accuracy better than 5%. Furthermore, we show that spatial variations in the Brownian diffusion coefficient can be imaged with an axial resolution determined by the coherence length of the light source (~30 μm) . The experiments also show broadening of the power spectrum as a function of depth into the sample, most likely as a result of detecting multiply scattered light.

© 1998 Optical Society of America

OCIS Codes
(030.1640) Coherence and statistical optics : Coherence
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(180.3170) Microscopy : Interference microscopy
(290.7050) Scattering : Turbid media

Citation
D. A. Boas, K. K. Bizheva, and A. M. Siegel, "Using dynamic low-coherence interferometry to image Brownian motion within highly scattering media," Opt. Lett. 23, 319-321 (1998)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-23-5-319


Sort:  Author  |  Year  |  Journal  |  Reset

References

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