High numerical aperture light scattering instrument for detecting particles in fluid

摘要

A device (FIG. 2) that uses light to detect particles in fluid is disclosed. The device incorporates a lens and reflector on a flow cell to increase the numerical aperture of a subsequent light collection system without any increase in spherical aberration.

主权项

1. A device for optically detecting particles in fluid comprising:
a light collection system which maximizes the light intensity output scattered from a particle in fluid resulting in a monotonic relationship between scattered light intensity and particle size for spherical polystyrene particles with light sources having wavelengths in the range of 430 nm to 1500 nm suspended in fluids with optical indexes ranging between 1.3 and 1.5, said light collection system comprising: a light source; a flow cell; a reflector on said flow cell; a lens on said flow cell; and wherein glass is used as a medium for which light to travel.