Patent ID: 6184517
Filing Date: 2001-02-06
Classification: G01N

Abstract:
A particle analyzer comprising:a cavity provided with a cell;a spectrum detector;means for introducing particles to be analyzed into said cell;means for applying a laser beam into said cavity to cause irradiation with said laser beam said particles within said cell to cause photo emission of said particles;fiber optic transmission means for gathering said photo emission over a wide range, and for concentrating and transmitting concurrently all of the gathered photo emission, said transmission means having one end thereof connected to said cavity and another end thereof connected to said spectrum detector and being a single line;blocking means connected directly to said one end of said transmission means and within said cavity for blocking from transmission by said transmission means wavelengths outside of said wavelengths of photo emission caused by said particles;grating means disposed within said spectrum detector for receiving all of the photo emission transmitted by said transmission means and for providing therefrom spectral lines thereof; andan array of a plurality of photo detectors parallely disposed within said spectrum detector, including at least three adjacent photo detectors, for detecting concurrently at least three adjacent ones of all of the spectral lines provided by said grating means thereby to identify a peak emission from the at least three adjacent photo detectors and thereby determine elemental components and sizes of said particles.