Journal
INFRARED PHYSICS & TECHNOLOGY
Volume 52, Issue 6, Pages 408-411Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.infrared.2009.08.001
Keywords
Infrared focal plane array; IRFPA; Residual nonuniformity; RNU; Space-based surveillance; Superlattice material
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The performance of infrared focal plane arrays (IRFPAs) is usually described by a set of figures of merit and operating parameters. They include FPA format, pixel pitch, operating temperature, cut-on and cutoff wavelengths, median detectivity. uniformity, and integration time. This article examines the promise of superlattice infrared materials and how the improved FPA figure of merit affects sensor system performance as measured by range, update rate, size, power, and cost. A simple analysis shows that for space-based surveillance, the system cost, as measured by the number of hosting satellites, may be decreased substantially by using detector arrays with large array size and longer detection range. It also shows that to make long-wavelength superlattice IRFPAs useful for future space applications, the residual nonuniformity must be improved. (C) 2009 Elsevier B.V. All rights reserved.
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