Light scattering analysis and measurement

Optics: measuring and testing – By particle light scattering – With photocell detection

Reexamination Certificate

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C356S342000

Reexamination Certificate

active

11070270

ABSTRACT:
A light scattering apparatus capable of measuring light scattering of opaque samples. In the apparatus, control section190controls an optical path length required for laser light output from laser light source210to being incident on a sample and then outgoing as scattered light to approximate by zero. Detector330detects outgoing scattered light to output as a photon pulse. Pulse interval measurer350measures a time interval of the photon pulse output from detector330. An operator in computer360calculates an n-order correlation function (n1) using the time interval of the photon pulse measured in pulse interval measurer350.

REFERENCES:
patent: 5752519 (1998-05-01), Benaron et al.
Furukawa, H., et al., “Swelling-induced Modulation of Static and Dynamic Fluctuations in Polyacrylamide Gels observed by Scanning Microscopic Light Scattering”,Physical Review E, pp. 031406-1-031406-14, (2003).
Furukawa, H., et al., “Characterization of Fine Network Structure in Polymar Gels with Scanning Microscope Light Scattering”,Japanese Journal of Polymer Science and Technology, vol. 59, No. 10, pp. 578-589, (Oct. 2002).
Furukawa, H., et al., “Dynamic Light Scattering from Static and Dynamic Fluctuations in Inhomogeneous Media”,Journal of the Physical Science of Japan, vol. 71, No. 12, pp. 2873-2880, (2002).
Aberle, L.B., et al., “Effective suppression of multiply scattered light in static and dynamic light scattering”,Applied Optics, vol. 37, No. 27, pp. 6511-6524, (Sep. 1998).
Otsuka Electronics Co. Ltd., “Fiber-optics particle analyzer FPAR-1000”, www.photal.co.jp/product/fpar—0.html, and English version searched on www.photal.co.jp/english/product/fpar.html, (Aug. 24, 2006).
Weitz, D.A., et al., “Diffusing-wave spectroscopy”,W Brown ed., Oxford Science Pub., Ch. 16, pp. 652-720, (1993).

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