SENSOR SYSTEM

The invention provides a sensor system (800) for generating a sensor signal (Sout) corresponding to a filtered image of a scene. The system (800) incorporates a multielement array (526) and associated processing circuits for providing element signals in response to images projected onto it and a pro...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	LEES, DAVID, JOHN, MARSHALL, GILLIAN, F, COLLINS, STEVEN, BALLINGALL, RONALD, A
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	COLORIMETRY DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY FREQUENCY-CHANGING MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT MEASURING NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION RADIATION PYROMETRY TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF TESTING
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Beschreibung
Zusammenfassung:	The invention provides a sensor system (800) for generating a sensor signal (Sout) corresponding to a filtered image of a scene. The system (800) incorporates a multielement array (526) and associated processing circuits for providing element signals in response to images projected onto it and a projecting lens assembly (502) for projecting images onto the array (526). The lens assembly (502) projects differently blurred images of the scene onto the array (526) for generating a measurement signal during a measurement phase and a local spatial average correction signal during a calibration phase. A light-diffusing shutter (522) is used for generating the differently blurred images. The system (800) substracts the measurement and correction signals of each element from one another to provide a difference signal and uses this signal to generate the sensor signal (Sout) during the measurement phase. The calibration phase is repeated on change of array temperature or incident radiation intensity, thereby reducing fixed pattern noise in the sensor signal (Sout) despite environmental change, and interrupting the measurement phase only infrequently.