IMAGING MACHINE WITH SEVERAL DETECTOR ARRAYS ARRANGED IN A FOCAL PLANE

摘要

An imaging device intended to be placed on board a satellite or an aircraft comprises at least two detector arrays that are arranged in the same focal plane. Each detector array itself comprises a unidirectional detector and at least one additional detector, produced on one same single-piece substrate dedicated to said detector array. The arrangement of the detectors in the focal plane is then carried out in a modular fashion, by positioning the respective substrates of the detector arrays. Several arrangements are proposed that are compatible with the unidirectional and bidirectional push-broom scanning modes.

主权项

1. An imaging device to be placed on board a satellite or an aircraft, comprising:
an imaging optics, suitable for forming an image in a focal plane; at least two luminous flux detector arrays, each separately comprising:
a main detector of the unidirectional type with several parallel rows of first photosensitive elements that are juxtaposed in a row direction, said rows being offset in a column direction perpendicular to the row direction and all extending over the same first length in said row direction, said main detector having a unidirectional row transfer direction parallel to the column direction; andat least one additional detector, each comprising at least one row of second photosensitive elements that are juxtaposed parallel to the row direction, each additional detector being suitable for capturing images in motion in the focal plane parallel to the column direction; for each main detector, a first filter arranged for spectral filtering of the luminous flux reaching the first photosensitive elements of said main detector, with a first spectral transmission window; and for each additional detector, a second filter arranged for spectral filtering of the luminous flux reaching the second photosensitive elements of said additional detector, with a second spectral transmission window different from the first spectral transmission window for the same detector array,in which, for each detector array separately from the other detector array, the main detector and each additional detector are produced on one same single-piece substrate dedicated to said detector array, with the row of second photosensitive elements extending in the row direction over a second length comprised between 0.9 and 1.1 times the first length, and being offset with respect to the rows of the main detector parallel to the column direction,the respective substrates of the two detector arrays both being arranged in the same focal plane of the imaging optics, and oriented so that the respective column directions of said detector arrays are parallel to each other.