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30 June 1998 Coherent light-beating scattering (CLBS) as a new interference technique for size and velocity control
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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 detection is to observe beating in optical signal consists of two components: scattered coherent vector waves with variable states of their vectors of polarization (coherent light beating scattering-CLBS). 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 givers fluctuation of intensity available to next spectral analysis of electrical signal. By CLBS, in contrast, a single particle is to form two vectorial scattered coherent components to beat on photodetector that joints beating and scattering as the basis of a new active control of a distribution of particles with possibility of simultaneous k-spectroscopy of sizes and w-spectroscopy of velocities. The preliminary experimental results on control of several types of plankton and sperm are discussed in scope of using CLBS as a new optical standard to measure of bioactivity.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Anatoly T. Sukhodolsky and P. A. Sukhodolsky "Coherent light-beating scattering (CLBS) as a new interference technique for size and velocity control", Proc. SPIE 3478, Laser Interferometry IX: Techniques and Analysis, (30 June 1998);

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