Paper
15 July 1994 Theoretically limited temperature sensitivity of thermal detectors with restricted spectral range
Igor I. Taubkin, Mikhail A. Trishenkov
Author Affiliations +
Abstract
Spectral characteristics of specific detectivity D*((lambda) m) and noise equivalent temperature difference NETD*((lambda) m) were calculated for background noise limited thermal detectors with restricted spectral range ((lambda) m - cut-off wavelength). In the actual spectral range ((lambda) m<15 micrometers ) thermal detectors are able to ensure the same values of D*((lambda) m) and NETD*((lambda) m) as for quantum detectors. NETD*((lambda) m) and D*((lambda) m) values are shown to be connected by `kT2-rule': NETD*((lambda) m) - (root)2kT2D*((lambda) m). It was accentuated that this rule may be applied to quantum photodetectors but with some definitions. The approximations were offered permitting to calculate values of D*((lambda) m) and NETD*((lambda) m) in all spectral ranges with the accuracy of not worse than 2%. It was shown that as D*((lambda) m) of an ideal thermal detector with a cold filter increases the cooling temperature necessary for achievement of theoretical limited values of D*((lambda) m) and NETD*((lambda) m) also increases. Such a behavior is opposite to that known for quantum photodetectors.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Igor I. Taubkin and Mikhail A. Trishenkov "Theoretically limited temperature sensitivity of thermal detectors with restricted spectral range", Proc. SPIE 2225, Infrared Detectors and Focal Plane Arrays III, (15 July 1994); https://doi.org/10.1117/12.179688
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KEYWORDS
Sensors

Photodetectors

Temperature metrology

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