Method of quatitatively determining one or more characteristics

Details Method of quatitatively determining one or more characteristics Method of quatitatively determining one or more characteristics

1996-08-23

1997-08-26

Tokar, Michael J.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

25033902, 128633, A61B 500

Patent

active

056613024

ABSTRACT:
Method of quantitatively determining one or more characteristics of a substance using near infrared spectroscopy. The method including irradiating a point of the substance with radiation at at least two distinct wavelengths, measuring the intensity of the radiation detected at two locations, determining the optical path lengths of the radiation between the irradiation point and the two detecting locations, and determining the effect of the divergence of the radiation reaching two locations. The relative coupling efficiencies of the two detectors are determined by the use of a second emission point equidistant from the two detectors. The characteristic being measured is then determined by the intensity of the radiation detected at the detecting locations with the result modified by accounting for the optical path lengths to the detecting locations, the detector coupling efficiencies and the effect of divergence of the radiation before reaching the detecting locations.

REFERENCES:
patent: 5285783 (1994-02-01), Secker
patent: 5379764 (1995-01-01), Barnes et al.
patent: 5517987 (1996-05-01), Tsuchiya
patent: 5529065 (1996-06-01), Tsuchiya

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