Apparatus and method for analysis of a sample medium in a gap be

Details Apparatus and method for analysis of a sample medium in a gap be Apparatus and method for analysis of a sample medium in a gap be

1991-03-25

1992-06-09

Anderson, Bruce C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356339, G01N 2186, G01N 2100

Patent

active

051209799

ABSTRACT:
An apparatus or method identifies and quantifies components of a sample medium filling a gap of an assembly of a transparent tube and a cylindrical float located substantially coaxially with the tube. This identification or quantification is made based on the high angle scatter and/or fluorescence of the medium. A polarized monochromatic or biochromatic light beam of the wavelength for which the tube is transparent projects through an optical focusing and/or scanning system to illuminate a section of the gap with a line of light positioned parallel to the longitudinal axis of the tube but displaced laterally therefrom. Means position and rotate the tube about its longitudinal axis producing a complete circumferential illumination of the sample medium sections in the gap. Light filtering and detecting means normal to the illumination axis detects high angle light scattering properties and/or fluorescence properties from the sample medium. Signal processing means analyzes the output from the detecting means to identify and quantify the sample medium.

REFERENCES:
patent: 3901602 (1975-08-01), Gravatt
patent: 4265538 (1981-05-01), Wertheimer
patent: 4567373 (1986-01-01), O'Meara et al.
patent: 4676641 (1987-06-01), Bott
patent: 4771181 (1988-09-01), Hayashi
patent: 4859861 (1989-08-01), Mersch
patent: 4920275 (1990-04-01), Itoh
patent: 4990795 (1991-02-01), Suzuki et al.
patent: 5008556 (1991-04-01), Mersch

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