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Publication Citation: Increased responsivity pyroelectric radiometer with dome input and temperature control

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Author(s): George P. Eppeldauer; Jinan Zeng; Leonard M. Hanssen;
Title: Increased responsivity pyroelectric radiometer with dome input and temperature control
Published: July 18, 2011
Abstract: Pyroelectric radiometers with noise-equivalent-power (NEP) close to 1 nW/Hz¿ have been developed to measure less than 1 microwatt radiant power levels at room temperature to 25 micrometer. The radiometers will be used as transfer standards for routine spectral responsivity calibrations in the infrared range at the output of a traditional monochromator. Dome input-optics are used with multiple beam reflections to increase absorptance and to minimize structures in the spectral responsivity function. The temperature of the pyroelectric detector is stabilized with a thermoelectric cooler/heater. Spectral power responsivity calibrations were performed with two different methods. A Fourier Transform Spectrometer using it‰s Infrared Reference Integrating Sphere System based method was validated with a continuously variable filter-monochromator based detector-comparison method using earlier developed pyroelectric radiometer standards. A responsivity uncertainty of 1.4 % (k=2) was obtained between 2 and 14 micrometers.
Conference: SPIE Defense, Security and Sensing
Proceedings: SPIE IR Sensors and Systems Conference
Volume: 8014
Pages: pp. 801419-1 - 801419-8
Location: Orlando, FL
Dates: April 25-29, 2011
Keywords: infrared; low-NEP; pyroelectric; reference detector; reflecting dome; spectral responsivity; temperature control; transfer standard
Research Areas: Optical Metrology, Physics