Single-particle optical sensor with improved sensitivity and dyn

Details Single-particle optical sensor with improved sensitivity and dyn Single-particle optical sensor with improved sensitivity and dyn

1996-03-28

1998-11-10

Font, Frank G.

Optics: measuring and testing

For size of particles

By particle light scattering

356335, 356337, 356338, 356343, G01N 1502, G01N 2100

Patent

active

058352112

ABSTRACT:
An optical sensor for counting and sizing particles, including a light extinction (LE) signal representative of the particles, and a light scattering (LS) signal representative of the particles. The light scattering signal and the light extinction signal are combined to form a single composite signal. The single composite signal has a substantially similar output to the light extinction (LE) signal for particle sizes in an upper range of particle sizes typically measured by the light extinction sensor. The single composite signal has a substantially similar output to the light scattering (LS) signal for particle sizes in a lower range of particle sizes typically measured by the light scattering sensor. The single composite signal has an output representing the combined light extinction (LE) signal and light scattering (LS) signal for particle sizes in a middle range of particle sizes.

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