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A super-pixel QWIP focal plane array for imaging multiple waveband temperature sensor

Authors
Journal
Infrared Physics & Technology
1350-4495
Publisher
Elsevier
Publication Date
Volume
52
Issue
6
Identifiers
DOI: 10.1016/j.infrared.2009.05.010
Keywords
  • Infrared
  • Infrared Fpa
  • Qwip
Disciplines
  • Computer Science
  • Physics

Abstract

Abstract The multi-waveband temperature sensor (MWTS) array, in which each super-pixel (2 × 2 pixel cell) operates at four distinct thermal infrared (IR) wavebands is being developed. Using this high spatial resolution, four-band thermal IR band detector array, accurate temperature measurements on the surface of an object can be made without prior knowledge of its exact emissivity. This multi-band detector involves intersubband transition in III–V semiconductor-based quantum layered structures. Each detector stack absorbs photons within the specified wavelength band while allowing the transmission of photons in other spectral bands, thus efficiently permitting multi-band detection. This produces multiple, spectrally resolved images of the scene that are recorded simultaneously in a single snapshot on the FPA. From the multispectral images and calibration information about the system, computational algorithms are used to evaluate the temperature on the surface of a target.

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