Spatial Noise Reduction by Optical Filters in Mercury Cadmium Telluride Hybrid Focal Plane Arrays

  • Vishnu Gopal Solid state Physics Laboratory, Delhi
  • S.K. Singh Solid state Physics Laboratory, Delhi
DOI: https://doi.org/10.14429/dsj.51.2207
Keywords: Optical filters, spatial noise, temporal noise, NETD performance, HgCdTe FPAs, MWIR anays, LWIR arrays

Abstract

This paper discusses the role of optical filters in the reduction of spatial noise in Hgl-xCdxTe hybrid focal plane arrays (FPAs). It is shown that optical filters of appropriate cut-off wavelength can cause considerable reduction in the spatial noise of both mid-wavelength infrared (MWIR) and long-wavelength infrared (LWIR) arrays. These filters can result in considerable improvement in the NETD performance of a MWIR HgCdTe FPA, whereas in LWJR FPAs, these can also be used to trade-off the requirement of composition uniformity of the HgCdTe substrate, depending upon the relative magnitude of temporal and spatial noise components
Published
2002-01-01
How to Cite
Gopal, V., & Singh, S. (2002). Spatial Noise Reduction by Optical Filters in Mercury Cadmium Telluride Hybrid Focal Plane Arrays. Defence Science Journal, 51(1), 75-82. https://doi.org/10.14429/dsj.51.2207
Issue
Vol 51 No 1: IR Materials and Detectors for Thermal Imaging
Section
Special Issue Papers
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