Optical imaging device for the spectral analysis of a scene

The optical imaging device comprises, for spectral analysis of a scene, on the one hand a mask (8) arranged in the intermediate image plane (PI), comprising a defined number of slots which each isolate a defined part of the image of the observed scene, the large dimension of the slots being parallel...

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Hauptverfasser: FONTANELLA, JEAN-CLAUDE, REMY, BERTRAND
Format: Patent
Sprache:eng ; fre ; ger
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Beschreibung
Zusammenfassung:The optical imaging device comprises, for spectral analysis of a scene, on the one hand a mask (8) arranged in the intermediate image plane (PI), comprising a defined number of slots which each isolate a defined part of the image of the observed scene, the large dimension of the slots being parallel to the lines of elementary detectors constituting the detector (11) and perpendicular to the axis (6) of rotation of the mirror (5) and comprises, on the other hand, a dispersive lens (9) arranged in the vicinity of the refocusing lenses (101, 102) and splitting a defined number of wavelengths coming from the mask (8), the dispersive lens (9) being designed to disperse each wavelength in a defined respective direction in order to cover the entire sensitive surface of the detector (11) when scanning the scene. The applications are, in particular, for spectral analysis of the thermal signature of a target and the detection of gas.