LWIR is also of special interest to NASA for planetary observation missions. The LWIR wavelength region is an ideal wavelength to look back at the earth from space and accurately map minute variations in the surface and/or atmospheric temperatures. It is even possible to use simultaneous measurements from two different LWIR wavelengths (a two-color camera) to help isolate the surface temperature from that of the atmosphere. This same LWIR technology can also be readily applied for observation of other planets.
IR imaging sensors also find their use in commercial applications such as deep-space astronomy, commercial satellite imaging, geophysics, geology, remote environmental (pollution) IR sensing, law enforcement, search and rescue, firefighting and emergency response. For its part, the Optoelectronics Industry Development Association estimates that the current infrared imaging market for military and law enforcement applications is about US$3 billion. The development of high performance LWIR imagers with higher operating temperature has the potential to significantly reduce the operational cost of these sensors and thus potentially open up new lower cost commercial applications.
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