Apparatus for calibrating an optical instrument, and applications thereof
AssigneeCentre National D'Etudes Spatiales
InventorJean-Pierre Deshayes
Life of this patent
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Abstract
To calibrate a radiometric optical instrument by means of a light source, the focal plane of the optical instrument containing photoelectric detectors which convert image brightness into an electrical signal, the light source is disposed in the entrance pupil or in the aperture diaphragm of the instrument. The invention is particularly suitable for calibrating an optical instrument on board a satellite.
Claims7
Apparatus for calibrating a radiometric optical instrument of the kind including a focal plane, an entrance pupil and an aperture diaphragm, by means of a light source, said focal plane of the optical instrument containing photoelectric detectors which convert image brightness into an electrical signal, wherein said light source is disposed in the entrance pupil or in the aperture diaphragm of the instrument.
Dependencies are inferred from the claim text.