Translator Disclaimer
29 September 2005 Acousto-optic tunable filters for infrared imaging
Author Affiliations +
Sensing from space requires the development of hyperspectral imagers operating in the two atmospheric window regions (3-5 μm and 8-12 μm) in the infrared region. At the Army Research Laboratory we are developing hyperspectral imagers operating in these two regions based on using acousto-optic tunable filters (AOTFs). Research is going on in the growth of new acousto-optic materials-mercurous halides (Hg2Cl2 and Hg2Br2) and tellurium (Te) for development of AOTF cells. We have developed a hyperspectral imager using a tellurium dioxide (TeO2) AOTF with a liquid-nitrogen-cooled indium antimonide (InSb) 256×256 focal plane array (FPA) that covers 2-4.5 μm region and another imager using a thallium arsenic selenide (TAS) AOTF with liquid-nitrogen-cooled mercury cadmium telluride (HgCdTe) 256×256 FPA to cover 7.8-9.8 μm region. Each of these imagers has been integrated on a tripod-mountable platform with an appropriate optical train. Control of RF electronics, and image acquisition and storage operations are carried out under full computer-control with a user-friendly interface. We will discuss the progress in material development and present imaging results.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Neelam Gupta "Acousto-optic tunable filters for infrared imaging", Proc. SPIE 5953, Acousto-optics and Photoacoustics, 59530O (29 September 2005);


Multidomain smart sensors
Proceedings of SPIE (July 26 1999)
Helicopter-borne dual-band dual-FPA system
Proceedings of SPIE (October 10 2003)
Data collection with a dual-band infrared hyperspectral imager
Proceedings of SPIE (September 07 2005)

Back to Top