MEASURING APPARATUS USING OPTICAL INTERFERENCE TECHNIQUES

Apparatus for measuring or detecting changes in a variety of physical or chemical parameters comprises an interferometer having a transmission frequency variable over a range of frequencies as a function of changes in the parameter. The transmission frequency is measured by beating with a coherent r...

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Bibliographische Detailangaben
Hauptverfasser:	BRADLEY, DANIEL JOSEPH, MURRAY, ROBERT THOMAS
Format:	Patent
Sprache:	eng
Schlagworte:	ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS 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 MEASURING ANGLES MEASURING AREAS MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR PHYSICS RADIATION PYROMETRY SIGNALLING TARIFF METERING APPARATUS TESTING TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILARSIGNALS
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Beschreibung
Zusammenfassung:	Apparatus for measuring or detecting changes in a variety of physical or chemical parameters comprises an interferometer having a transmission frequency variable over a range of frequencies as a function of changes in the parameter. The transmission frequency is measured by beating with a coherent reference frequency.