NIST-BMDO Transfer Radiometer (BXR)

Published

April 1, 2000

Author(s)

Timothy M. Jung, Adriaan C. Carter, Steven R. Lorentz, Raju V. Datla

Abstract

An infrared transfer radiometer has been recently developed for the Low-Background Infrared Calibration (LBIR) facility at the National Institute of Standards and Technology (NIST) for the Ballistic Missile Defense Organization (BMDO) program. The BMDO Transfer Radiometer (BXR) is designed to measure the irradiance of a collimated source of infrared light having an angular divergence of less than 1 mrad. It is capable of measuring irradiance levels as low as 10^-15 W/cm² over the spectral range from 2 υm to 30 υm. The radiometer uses an arsenic doped silicon blocked impurity band (BIB) detector operated at temperatures below 12 K. Spectral resolution is provided by narrow bandpass interference filters and long-wavelength blocking filters. All the components of the radiometer, which include a mechanical shutter, an internal calibration source and detector, a long baffle section, a spatial filter, two filter wheels, and a two-axis detector stage are cooled with an active flow of liquid helium to maintain temperatures below 20 K. A cryogenic vacuum chamber has been built to house the radiometer and to provide mechanical tilt alignment to the source. The radiometer is easily transported to a user site along with its support equipment.

Proceedings Title

Infrared Detectors and Focal Plane Arrays, Conference | 6th | SPIE

Conference Dates

April 25-27, 2000

Conference Title

Proceedings of SPIE--the International Society for Optical Engineering

Pub Type

Conferences

Keywords

BIB detector, infrared, transfer radiometer

Citation

Jung, T. , Carter, A. , Lorentz, S. and Datla, R. (2000), NIST-BMDO Transfer Radiometer (BXR), Infrared Detectors and Focal Plane Arrays, Conference | 6th | SPIE (Accessed April 16, 2024)