Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1995-11-03
1998-02-24
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
356335, G01N 2100
Patent
active
057214336
ABSTRACT:
An apparatus for analyzing particle images includes a sheath flow cell for transforming a particle suspension flow into a flat flow surrounded by a sheath liquid, a light source for irradiating particles in the transformed particle suspension flow, a video camera for capturing particle images of irradiated particles, an image analyzer for analyzing the captured particle images, and a display device. The image analyzer including a calculator for measuring a projected area and perimeter of each captured particle image to calculate a particle diameter and circularity of each particle, a graph making device for making a histogram based on the particle diameter and for making a scattergram based on two parameters corresponding to the particle diameter and the circularity to allow the display device to display the histogram and the scattergram, a memory for storing each of the captured particle images, and a particle image recalling device for allowing the display device to collectively display the particle images stored by the memory.
REFERENCES:
patent: 5159403 (1992-10-01), Kosaka
patent: 5166537 (1992-11-01), Horiuchi et al.
patent: 5426499 (1995-06-01), Kosaka et al.
Pyo Kevin
TOA Medical Electronics Co., Ltd.
Westin Edward P.
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