Optics: measuring and testing – Refraction testing – Prism engaging specimen
Patent
1975-06-05
1976-06-01
Corbin, John K.
Optics: measuring and testing
Refraction testing
Prism engaging specimen
250574, G01N 2100
Patent
active
039604497
ABSTRACT:
Particle analyzing method and apparatus are provided for measuring the intensity of light scattered from a particle as a function of angle. Particles such as biological cells are contained in a stream for travel along a path which includes a scatter line along which the particles pass successively. A beam of collimated monochromatic radiation is directed onto the flow path, and detector means are provided having a radiation acceptance geometry whose projection intercepts the beam along the scatter line. The projected acceptance geometry includes an aperture image located adjacent the scatter line and having a dimension in the direction of travel of the particles which is substantially less than the length of the scatter line such that the angle of scatter radiation detectable by the detector means varies according to the position of the particle along the scatter line. The output from the detector provides a measure of the scatter light intensity versus angle characteristic of the particle.
REFERENCES:
patent: 3422667 (1969-01-01), Hrdina
patent: 3713743 (1973-01-01), Simms
patent: 3822095 (1974-07-01), Hirschfeld
patent: 3835315 (1974-09-01), Gravitt, Jr.
patent: 3869209 (1975-03-01), Sigrist
Carleton Joseph G.
Sweet Richard G.
Clark Conrad
Corbin John K.
De Witt Donovan J.
The Board of Trustees of Leland Stanford Junior University
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