Development and Calibration of Pyroelectric Radiometer Standards at NIST

Published

April 21, 2006

Author(s)

George P. Eppeldauer, Jinan Zeng, Leonard M. Hanssen

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 ?m to 19 ?m range

Proceedings Title

SPIE Defense and Security Symposium | | Sensors, and Commands, Control, Communications, and Intelligence (C#!) Technologies for Homeland Security and Homeland Defense V | SPIE

Volume

6201

Conference Dates

April 17-21, 2006

Conference Title

Proceedings of SPIE--the International Society for Optical Engineering

Pub Type

Conferences

Keywords

detector calibration, infrared, pyroelectric radiometer, spectral responsivity, transfer standard

Citation

Eppeldauer, G. , Zeng, J. and Hanssen, L. (2006), Development and Calibration of Pyroelectric Radiometer Standards at NIST, SPIE Defense and Security Symposium | | Sensors, and Commands, Control, Communications, and Intelligence (C#!) Technologies for Homeland Security and Homeland Defense V | SPIE (Accessed December 12, 2024)