Instrument and method for spectroscopic analysis by reflectance

Details Instrument and method for spectroscopic analysis by reflectance Instrument and method for spectroscopic analysis by reflectance

1998-06-17

2000-10-24

Evans, F. L.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

25033911, 25033912, 2503412, 2503418, 356 73, 356342, 356440, 356328, G01N 2101, G01N 2125, G01N 2147

Patent

active

061371084

ABSTRACT:
A probe for a spectrometer has a slot for receiving a sample, an illuminating fiber optic bundle directing light to the sample in the slot, and first and second collecting fiber optic bundles transmitting light from the sample to the spectrometer, wherein the first collection fiber optic bundle is positioned to optimize the collection of transmitted light without scattering through the sample, and the second collection fiber optic bundle is positioned to optimize the collection of light diffusely reflected from the sample. In one embodiment, the first collection bundle is arranged in an annulus around the illuminating bundle, and the second collection bundle is arranged in an annulus around the first collection bundle. In a second embodiment, the second collection bundle is arranged in an annulus around the illuminating bundle, and the first collection bundle terminates in an interface with the sample located across the slot from the illuminating bundle and the second collection bundle.

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patent: 5311283 (1994-05-01), Heeschen
patent: 5418615 (1995-05-01), Doyle
patent: 5708273 (1998-01-01), VonBargen

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