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18 May 2011 Increased responsivity pyroelectric radiometer with dome input and temperature control
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Pyroelectric radiometers with noise-equivalent-power (NEP) close to 1 nW/Hz1/2 have been developed to measure less than 1 μW radiant power levels at room temperature to 25 μm. 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 inputoptics 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 filtermonochromator based detector-comparison method using earlier developed pyroelectric radiometer standards. A responsivity uncertainty of 1.4 % (k=2) was obtained between 2 μm and 14 μm.
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George P. Eppeldauer, Jinan Zeng, and Leonard M. Hanssen "Increased responsivity pyroelectric radiometer with dome input and temperature control", Proc. SPIE 8014, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXII, 801419 (18 May 2011);

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