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Image mapping radiometer with a band-to-band registration device
Image mapping radiometer with a band-to-band registration device
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机译:具有频带对位记录装置的图像映射辐射计
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摘要
An image mapping radiometer mounted on a craft flying an orbit above an object zone. The radiometer includes main optics having in the visible field thereof a unit object zone defined by the swath width over the object zone and a distance in the direction of orbit, and a plurality of linear photoelectic detectors each being assigned to one of a plurality of observation spectral bands and located in the focal plane of the main optics, thereby sequentially imaging the unit object zone. A correcting section has correction optics for projecting a correction pattern onto the photoelectric detectors so as to correct the band-to- band registration, i.e., the positional deviation between the elements of the detectors. A movable mirror is provided for selecting either of the main optics and correction optics. When the correction pattern is projected, a lattice pattern having a pitch different from the element pitch is generated on the light-sensitive surfaces of the detectors. The correction is effected by calculating the output signal levels of the detectors associated with the projected image on the basis of a vernier principle.
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