Paul Jougla, Alice Robert, Jérémie Lochard, Joel Boyadjian, Vincent Costes, Laurie Pistre, Matthieu Castelnau, Damien Rodat, Christian Imbert, Camille Desjardins
This presented study is initiated in the frame of CNES advanced studies. It aims at providing a better understanding of driving parameters for this type of instruments, and exploring suitable, very compact hyperspectral instruments based on grating spectrometers. First a scalar model for multiblazed gratings is developed, and confronted with more detailed diffraction models. The spectral band is in the range of 400-2500 nm, with a spectral resolution of about 10 nm width. The Ground Sampling Distance (GSD) shall be between 10 and 15m, the Field of View (FOV) shall be larger than 8km, the orbit Height is 550km. Three types of instruments are proposed, a common spectrometer with a unique detector, a common spectrometer working in diffraction order 1 for the SWIR, and 2 for the VIS spectral band, and 2 spectrometers within field separa tion. For each instrument the grating blazed profile is optimized, the key instruments parameters computed, and an optical configuration is proposed. The study shows compactness optimization with these three instrument concepts, thanks to an entrance pupil diameter reduction along with better grating diffraction efficiency
A laser system made of two beams of 10 PW each has been designed and is currently built for ELI-NP research infrastructure. Design is presented as well as preliminary results up to the 1PW level amplifier.
Since 2005, The THALES Group is successfully manufacturing TV/4 format QWIP sensitive arrays in high rate production through THALES Research and Technology.
Sofradir has entered a full production of its VEGA-LW-RM4 IDDCA using a 25μm pitch, 384x288 QWIP Array which is the core of the very compact QWIP thermal imager CATHERINE-XP.
Serial production of CATHERINE-XP has now started in THALES Optronique in order to meet the delivery schedule of the various programs for which it has been selected. A review of the QWIP Production status, CATHERINE-XP achievements and current programs are presented.
As THALES Optronique has based its today strategy on very compact TI in order to address the largest panel of platforms and applications, THALES Optronique is working in cooperation with Sofradir and TRT on the evolutions of the product to take advantage of the new capabilities offered by QWIP technology like bi-spectral or polarimetric. The achievements of these developments are also presented
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