Ellipsoid-conic radiation collector and method

Details Ellipsoid-conic radiation collector and method Ellipsoid-conic radiation collector and method

1978-03-20

1980-02-19

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

With sample excitation

250461B, 350294, 356 39, 356301, 356336, 356338, G01J 330, G01N 2100

Patent

active

041892364

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.

REFERENCES:
patent: 1278026 (1918-09-01), Salto
patent: 2198014 (1940-04-01), Ott
patent: 3494693 (1970-02-01), Elmer
patent: 3946239 (1976-03-01), Salzman et al.

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