Modulation transfer function measurements on a MWIR T2SL focal plane array in IDDCA configuration
| Autor: | Jérôme Primot, J. Jaeck, Linda Höglund, Eric Costard, I. Ribet-Mohamed, Sylvie Bernhardt, Jean Nghiem, Sophie Derelle, Philippe Christol, Edouard Huard |
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| Přispěvatelé: | DOTA, ONERA, Université Paris Saclay (COmUE) [Palaiseau], ONERA-Université Paris Saclay (COmUE), Electrum 236 (IRnova AB), Institut d’Electronique et des Systèmes (IES), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Composants à Nanostructure pour le moyen infrarouge (NANOMIR), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Photodetector
02 engineering and technology Grating 01 natural sciences VIBRATIONS Optics Optical transfer function 0103 physical sciences Talbot effect [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics DETECTEUR INFRAROUGE 010302 applied physics Physics Spatial filter business.industry Detector CSIG MWIR FPA 021001 nanoscience & nanotechnology IDDCA [SPI.TRON]Engineering Sciences [physics]/Electronics Cardinal point MTF FTM T2SL Spatial frequency 0210 nano-technology business |
| Zdroj: | Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXIX Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXIX, Apr 2018, Orlando, United States. ⟨10.1117/12.2304793⟩ |
| Popis: | International audience; Type-II InAs/GaSb superlattice (T2SL) has recently matured into a commercially available technology addressing both MWIR and LWIR spectral domains. As the prerequisites such as Quantum Efficiency (QE) and dark current were met, more advanced figures of merits related to the ElectroOptic (EO) system as a whole can now be studied in order to position this technology. In this paper, we focus on modulation transfer function (MTF) measurements. Knowing the MTF of a detector is indeed of primary importance for the EO system designers, since spatial filtering affects the system range. We realized MTF measurements on a 320x256 MWIR T2SL FPA provided by IRnova, using a Continuously Self Imaging Grating (CSIG). The advantage of this experimental configuration is that no high performance projection optics is required. Indeed, the CSIG exploits the self-imaging property (known as Talbot effect) to project a pattern with known spatial frequencies on the photodetector. Such MTF measurements have never been done in Integrated Detector Dewar Cooler Assembly (IDDCA) configuration, so we had to study the effect of the vibrations induced by the cryocooler. Vibrations indeed affect the MTF measurement in the same way electrical diffusion would do. Using three accelerometers we optimized our experimental setup and extracted MTF measurements with reduced vibrations. The pixel size is 26μm for a pitch of 30 μm. |
| Databáze: | OpenAIRE |
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