Optical system for signal light detection in a flow particle ana

Details Optical system for signal light detection in a flow particle ana Optical system for signal light detection in a flow particle ana

1988-11-15

1990-09-04

Willis, Davis L.

Optics: measuring and testing

By particle light scattering

With photocell detection

356339, G01N 2153

Patent

active

049539795

ABSTRACT:
An optical system for use in a flow particle detection apparatus is disclosed as having a light source for directing light onto flow partricles, a condenser lens for condensing signal light emitted from the flow particles, a photodetector for receiving signal light exiting from the condenser lens, an aperture provided between the condenser lens and the photodetector for removing undesired light, and a convergence-type collimating lens provided between the aperture and the photodetector, the aperture being disposed at a front focal position of the convergence-type collimating lens, and an exit pupil of the condenser lens and a photosensitive surface of the photodetector being located respectively at conjugate points of the convergence-type collimating lens.

REFERENCES:
patent: 4176960 (1979-12-01), Eckbreth et al.
patent: 4577964 (1986-03-01), Hansen, Jr.

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