Optics: measuring and testing – Refraction testing – Prism engaging specimen
Patent
1976-09-24
1978-08-29
Engle, Samuel W.
Optics: measuring and testing
Refraction testing
Prism engaging specimen
250222PC, 356103, G01N 1502, G01D 2104, G01N 2100
Patent
active
041100433
ABSTRACT:
Apparatus for counting and classifying particles and including a laser for producing a laser beam, a flow nozzle for hydrodynamically focussing a stream of such particles and directing the focussed stream to intersect the laser beam, a focussing system causing the laser beam to have a diameter which, at the point of intersection with the particle stream, is no greater than the width of the particles, and a detector disposed to receive the laser radiation transmitted by the particles as they pass through the laser beam.
REFERENCES:
patent: 3661460 (1972-05-01), Elking
patent: 3662176 (1972-05-01), Kamentsky
patent: 3790760 (1974-02-01), Stiller
patent: 3871770 (1975-03-01), Behrens
patent: 3984307 (1976-10-01), Kamentsky
Engle Samuel W.
Gesellschaft fur Strahlen- und Umweltforschung mbH Munchen
Walsh Donald P.
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