IR presentations planned for defence expo
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Sofradir product story
Edited by the Engineeringtalk editorial team
Apr 6, 2007
Sofradir company executives will give two presentations on advances in infra-red detectors at the SPIE Defense and Security Symposium, April 9th - 13th, in Orlando, Florida, US.
Sofradir company executives will give two presentations on advances in infra-red detectors at the SPIE Defense and Security Symposium, April 9th - 13th, in Orlando, Florida, US.
Sofradir co-authored two technical papers that will be presented by members of the CEA/Leti-Minatec technology research centre.
Philippe Tribolet, VP RandD, Technologies and Products at Sofradir will chair the session on HgCdTe (mercury cadmium telluride or MCT).
"We are delighted that Sofradir has a strong presence at this year's SPIE", said Tribolet.
"It is an excellent illustration of the cutting-edge role played by Sofradir in the defence and security field".
Tribolet will open the session on HgCdTe.
The session will lead with a presentation on Advanced MCT Technologies in France, a technical paper he co-authored with Gerard Destefanis, Research Director and Program Manager at the CEA/Leti-Minatec.
The paper gives an overview of the progress of MCT infra-red detectors in France, which covers molecular beam epitaxy growth, bicolour and dual band focal planar arrays (FPA).
It also includes a new area of development concerning avalanche photodiodes, which improve IR detector performance without increasing noise.
Marianne Molina, RandD engineer at Sofradir, will give a presentation on IR detector Dewar and cooler assemblies for stringent environmental conditions.
Environmental conditions (thermal, vibrations and shocks) are key performance and reliability factors for designing IR detectors.
Molina describes how Sofradir has addressed these constraints by developing specific design concepts to make the IR detector more robust in stringent environmental conditions.
This paper describes these design concepts that involve both the IRFPA and the cryogenics parts, and gives details about the level of robustness that is achieved.
Electro-Optical Development Engineer Agnes Combette will present the results on The nonUniformity Correction (NUC) performance of infra-red 2D staring arrays" NUC is a key factor to ensure the best IR image quality at the camera level.
The co-authored paper entitled Sigma-delta column-wise A/D conversion for cooled ROIC deals with designing a digital IR focal plane array (IRFPA).
It puts forward a case for using sigma-delta converters as a promising solution for high-performance and medium size focal planar arrays despite their relatively high power consumption.
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