PROGRAMMABLE STANDARD FOR USE IN AN APPARATUS AND PROCESS FOR THE NONINVASIVE MEASUREMENT OF OPTICALLY ABSORBING COMPOUNDS

The present invention provides a programmable filter for use as a standard in correlation spectrometers. Also provided is the use of the programmable standard in a process for determining the concentration of an optically absorbing compound. Also provided is a method and apparatus for noninvasively...

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Bibliographische Detailangaben
Hauptverfasser:	LINDBERG, JOHN M, HEINZ, ROBERT E
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	COLORIMETRY INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT MEASURING PHYSICS RADIATION PYROMETRY TESTING
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Beschreibung
Zusammenfassung:	The present invention provides a programmable filter for use as a standard in correlation spectrometers. Also provided is the use of the programmable standard in a process for determining the concentration of an optically absorbing compound. Also provided is a method and apparatus for noninvasively determining the concentration of an optically absorbing biological sample which incorporates the programmable standard of the invention. In one embodiment the programmable standard (20) contains a dispersive element (106a) and a transmissive spatial light modulator (108). Because the position of each light beam correlates to its wavelength, spatial filter (108) controllably and selectively attenuates desired wavelengths of the input beam.