Theoretical analysis of speckle-moire based on the study of speckles polarization for multieffect simulated biotissue

Duo-Min He

doi:10.1117/12.205997

30 March 1995 Theoretical analysis of speckle-moire based on the study of speckles polarization for multieffect simulated biotissue

Duo-Min He

Author Affiliations +

Proceedings Volume 2390, Optical Biophysics; (1995) https://doi.org/10.1117/12.205997
Event: Photonics West '95, 1995, San Jose, CA, United States

Abstract

In general, when laser light is incident on biotissue, four interactions can happen: some light is reflected; some of the remaining transmitted light is scattered inside the tissue; some of the light is absorbed; finally, some may be transmitted all the way through the tissue. In the field of speckle metrology for biomedical science, speckle pattern forming by biotissues, such as human skin, sclera, etc., consists of the above first part as well as the second part. The multiple reflection and scattering (multi-effect) occurs, which may cause the polarization state of laser speckles to have some changes. Therefore, it is necessary to pay attention to the properties of polarized laser speckles in biomedical application. Unfortunately, relatively few experimental results are available in the literature since the `speckle' as a key word appeared in 1975. For basic work, we simply make several pieces of ground glasses coated with different thicknesses of white paint as simulated biotissues, i.e., diffusers having multi-effects. Based on the study of speckles polarization for multi-effects, we provided an experimental study of speckle-moire phenomenon previously. In this paper, we present a new concept of paired correlation speckle patterns, and explain the mechanism of moire-specklegram theoretically. Also, speckle-moire phenomenon are further investigated.

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Duo-Min He "Theoretical analysis of speckle-moire based on the study of speckles polarization for multieffect simulated biotissue", Proc. SPIE 2390, Optical Biophysics, (30 March 1995); https://doi.org/10.1117/12.205997

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KEYWORDS

Speckle

Speckle pattern

Polarization

Biomedical optics

Laser scattering

Laser tissue interaction

Biological research

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