Light scattering type particle detector
AssigneeRion Co., Ltd.
InventorKazuo Ichijo
Life of this patent
Estimating the term…
Abstract
A light scattering type particle detector in which the S/N ratio is improved includes a particle detecting region D which is formed by irradiating laser light La on sample fluid and a light receiving array 5 which receives scattering light Ls due to particles which pass through the particle detecting region. The light receiving array 5 is formed to be circular by arranging a plurality of photoelectric converters Pd1-Pdn in a plane alignment. The particle detector also includes an adder 6 which adds the output from the plurality of the photoelectric converters Pd1-Pdn.
Claims24
A light scattering type particle detector for detecting particles comprising:
- a particle detecting region formed by irradiating a light beam on fluid sample;
- and
- a light receiving means fort receiving light scattered by particles which pass through said particle detecting region,
- wherein said light receiving means is comprised of a condenser means, a plurality of photoelectric converters, and an add processing means provided for conducting an add processing of the output from said plurality photoelectric converters, and
- wherein said light scattered by particles is collimated with said condenser means.
A light scattering type particle detector comprising;
- a particle detecting region which a light beam is irradiated on a fluid sample;
- a plurality of photoelectric converters which receive light scattered by particles passing through said particle detecting region and output corresponding signals;
- an adder which add processes said output signals of substantially all of said photoelectric converters;
- and
- a collimating device which collimates said light scattered by particles passing through said particle detecting region before the scattered light is received by said plurality of photoelectric converters.
A light scattering type particle detector for detecting particles comprising:
- a particle detecting region formed by irradiating a light beam on fluid sample;
- and
- a light receiving means for receiving light scattered by particles which pass through said particle detecting region,
- wherein said light receiving means is comprised of a plurality of photoelectric converters, and an add processing means for conducting an add processing of the output from said plurality photoelectric converters, and
- said add processing means add processes said output signals of said photoelectric converters such that a signal-to-noise ratio is improved without influence of gaps existing between adjacent ones of said photoelectric converters.
Dependencies are inferred from the claim text.