Optics: measuring and testing – For size of particles – By particle light scattering
Patent
1985-05-30
1989-01-31
Rosenberger, Richard A.
Optics: measuring and testing
For size of particles
By particle light scattering
356343, G01B 1108, G01N 1502
Patent
active
048012050
ABSTRACT:
A particle size measuring apparatus irradiates a number of particles to be measured with a laser beam, measures a light intensity pattern scattered by the particles to be measured, and calculates a relative particle size distribution of the particles to be measured from the measured value obtained. The apparatus has a laser unit, a collimator lens for collimating a laser beam from the laser unit into a parallel laser beam and irradiating the particles to be measured with the parallel laser beam, an optical shield, interposed between the collimator lens and the particles to be measured, for shielding scattered light by the collimator lens and allowing passage of only parallel components of the laser beam, a detecting section consisting of a plurality of optical fibers arranged at an equal distance from a measurement region and at predetermined scattering angles and photodetectors connected thereto, and an arithmetic operating circuit for calculating a relative particle size distribution of the particles to be measured from the scattered light intensity pattern detected by the detecting section.
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AIAA Paper No. 76-69, A Laser Diagnostic Technique for the Measurement of Droplet and Particle Size Distribution, Swithenbank et al., 1976.
The 1st International Conference on Liquid Atomization and Spray Systems (Tokyo, Japan), a Light Scattering Technique For Determining Droplet Size Distributions in Two-Phase LIquid-Dominated Nozzle Jets, Alger et al., 1978.
Kabushiki Kaisha Toshiba
Rosenberger Richard A.
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