Light scattering detector

Details Light scattering detector Light scattering detector

2005-04-12

2005-04-12

Rosenberger, Richard A. (Department: 2877)

Optics: measuring and testing

For size of particles

By particle light scattering

C356S343000, C356S246000

Reexamination Certificate

active

06879397

ABSTRACT:
An apparatus and method permits measuring of near-direct forward scattering functions in water to enable acceptable underwater imaging for detection, classification, and identification of objects, such as mines. A source of light mounted on a housing member receiving ambient water emits a beam of light along an axis to a scattering detector assembly mounted on the base member. The detector assembly has a central active region disposed in the axis to receive portions of the light beam emitted along the axis and a plurality of concentric active regions are located radially outwardly from the central active region and the axis to receive scattered portions of the light beam. The central and concentric active regions provide signals representative of the magnitudes of the axial and scattered portions of the light beam for determination of the scattering function of the ambient water.

REFERENCES:
patent: 4882478 (1989-11-01), Hayashi et al.
patent: 5185641 (1993-02-01), Igushi et al.
patent: 5936729 (1999-08-01), Igushi

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