title: Compact infrared cryogenic wafer-level camera: design and experimental validation.
abstract: We present a compact infrared cryogenic multichannel camera with a wide field of view equal to 120°. By merging the optics with the detector, the concept is compatible with both cryogenic constraints and wafer-level fabrication. The design strategy of such a camera is described, as well as its fabrication and integration process. Its characterization has been carried out in terms of the modulation transfer function and the noise equivalent temperature difference (NETD). The optical system is limited by the diffraction. By cooling the optics, we achieve a very low NETD equal to 15 mK compared with traditional infrared cameras. A postprocessing algorithm that aims at reconstructing a well-sampled image from the set of undersampled raw subimages produced by the camera is proposed and validated on experimental images.
authors.affiliation: ONERA, The French Aerospace Laboratory, Palaiseau, France. florence.de_la_barriere@onera.fr
authors.forename: Florence
authors.initials: F
authors.lastname: de la Barrière
authors.forename: Guillaume
authors.initials: G
authors.lastname: Druart
authors.forename: Nicolas
authors.initials: N
authors.lastname: Guérineau
authors.forename: Gilles
authors.initials: G
authors.lastname: Lasfargues
authors.forename: Manuel
authors.initials: M
authors.lastname: Fendler
authors.forename: Nicolas
authors.initials: N
authors.lastname: Lhermet
authors.forename: Jean
authors.initials: J
authors.lastname: Taboury