Title: Ellipsoid-conic radiation collector and method

Abstract: Disclosed is a radiation collector apparatus and method primarily for counting and analyzing a flow of dilute particulate material, such as blood cells, sperm cells and the like, through the use of light detection. The radiation collector apparatus comprises a reflector chamber having an ellipsoidal reflector surface with a pair of elipsoidal foci defining a first focus, f.sub.11, and second focus, f.sub.12, and a second reflector surface with a primary focus, f.sub.21, positioned at the same point as focus f.sub.12, and a secondary focus, f.sub.22. The second reflector surface has the configuration of one of the conic sections of revolution. In operation the radiation collector apparatus is provided with an intensifed beam of light and a stream of particulate material aligned to intersect the intensifed beam of light at focus f.sub.11. Detectable light signals, after two reflections, are received in a focused beam by a photosensitive detector.

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Other info:

Inventors: Hogg, Walter R. (South Miami, FL, US)
Brunsting, Albert (Miramar, FL, US)

Application Number: 888560
Filing Date: 1978-03-20
Publication_date: 1980-02-19
Assignee: Coulter Electronics, Inc. (Hialeah, FL)
Primary Class(es): 356/317 250/461.2, 356/39, 356/301, 356/336, 356/338, 359/859
Other Classes:
US Patent Ref:

1278026	Sep, 1918	Salto	362/303.
2198014	Apr, 1940	Ott	350/294.
3494693	Feb, 1970	Elmer	353/55.
3946239	Mar, 1976	Salzman et al.	356/39.

Other Refs:
Primary Examiner: McGraw, Vincent P.
Assistant Examiner:
Attorney: Newton; William A.