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Proceedings Paper

Coherent light beating scattering (CLBS) for size and velocity control
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Paper Abstract

An introduction into the elements of diffraction theory of coherent scattering of vector waves for size and velocity measurements is proposed to discuss. In traditional approach, a square-law detector is to observe beating in optical signal consists of two components: scattered and not-scattered scalar waves. The basis of proposed metrology is beating of two scattered coherent vector waves with variable states of their vectors of polarization (Coherent Light Beating Scattering (CLBS)) on a photodetector. Vectorial optical signal of CLBS is considered in framework of Fraunhofer diffraction of two plane vector waves by a single particle in case of periodical modulation of vector of polarization described as Jones vector. The formalism of Jones matrix is proposed to describe CLBS by a distribution of particles to control their sizes and velocities. A portable CLBS-spectrometer for size and motility application in biology is described. In traditional spectroscopy of optical beating, a particle alone provides with one scattered component of scalar wave to mix with a narrow-band reference wave on a square-law photodetector. As a result, a community of particles in motion gives fluctuation of intensity available for next spectral analysis of electrical signal. On the contrast, by CLBS, a single particle is to form two vectorial scattered coherent components to beat on a photodetector that joints beating and scattering as the basis for the new active control of a distribution of particles with the principal possibility of simultaneous k- spectroscopy of sizes and (omega) -spectroscopy of velocities. The CLBS-spectrum of alive Dunaliella is presented as a first example to develop a new optical standard to measure bioactivity.

Paper Details

Date Published: 4 March 1999
PDF: 10 pages
Proc. SPIE 3726, Saratov Fall Meeting '98: Light Scattering Technologies for Mechanics, Biomedicine, and Material Science, (4 March 1999); doi: 10.1117/12.341430
Show Author Affiliations
Anatoly T. Sukhodolsky, General Physics Institute (Russia)

Published in SPIE Proceedings Vol. 3726:
Saratov Fall Meeting '98: Light Scattering Technologies for Mechanics, Biomedicine, and Material Science
Valery V. Tuchin; Vladimir P. Ryabukho; Dmitry A. Zimnyakov, Editor(s)

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