Development and calibration of pyroelectric radiometer standards at NIST

G. P. Eppeldauer; J. Zeng; L. M. Hanssen

doi:10.1117/12.665997

10 May 2006 Development and calibration of pyroelectric radiometer standards at NIST

G. P. Eppeldauer, J. Zeng, L. M. Hanssen

Proceedings Volume 6201, Sensors, and Command, Control, Communications, and Intelligence (C3I) Technologies for Homeland Security and Homeland Defense V; 620119 (2006) https://doi.org/10.1117/12.665997
Event: Defense and Security Symposium, 2006, Orlando (Kissimmee), Florida, United States

Abstract

The reference spectral power responsivity scale of NIST is being extended from the silicon range to the infrared (IR) using pyroelectric radiometers. Two transfer standard pyroelectric radiometers have been developed at NIST. The main design consideration was to obtain only a minimal increase in the measurement uncertainty during the responsivity scale extension. Domain engineered LiNbO₃ and regular LiTaO₃ pyroelectric detectors were used in the two radiometers. Both detectors are gold-black coated and temperature controlled. Reflecting domes are attached to the radiometer inputs to decrease the reflectance loss and to improve the spatial uniformity of responsivity in the infrared. Four commercial pyroelectric detectors have been added to the group and used as working standards. The relative spectral responsivity of all pyroelectric detectors was determined from spectral reflectance measurements. The radiant power responsivity tie points were derived from Si trap and single element detectors traceable to the NIST reference responsivity scale. The pyroelectric radiometers have been characterized for frequency and temperature dependent responsivity, noise, spatial non-uniformity of responsivity, angular responsivity, and linearity. The expanded (relative) uncertainty of the spectral power responsivity calibrations ranged between 0.5 % and 1.2 % (k=2) within the 1 μm to 19 μm range.

Citation Download Citation

G. P. Eppeldauer, J. Zeng, and L. M. Hanssen "Development and calibration of pyroelectric radiometer standards at NIST", Proc. SPIE 6201, Sensors, and Command, Control, Communications, and Intelligence (C3I) Technologies for Homeland Security and Homeland Defense V, 620119 (10 May 2006); https://doi.org/10.1117/12.665997

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