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Displaying 76 - 100 of 147

Calibration and Characterization of Trap Detector Filter Radiometers

November 1, 2003
Author(s)
David W. Allen, George P. Eppeldauer, Steven W. Brown, E A. Early, Bettye C. Johnson, Keith R. Lykke
We describe the development of a mechanically simple, radiometrically stable transfer radiometer designed for both radiance and irradiance measurements. The filter radiometer consists of a six-element Si trap detector, a temperature stabilized filter wheel

Design and Characterization of a Photometer/Colorimeter Standard

August 1, 2003
Author(s)
J Racz, George P. Eppeldauer
A photometer/tristimulus colorimeter has been developed at the National Institute of Standards and TEchnology (NIST) to realize a color scale. A novel construction was developed to implement the spectral responsivity based scale with small uncertainty. The

Gold-Black Coatings for Freestanding Pyroelectric Detectors

May 23, 2003
Author(s)
John H. Lehman, Evangelos Theocharous, George P. Eppeldauer, Chris Pannell
We describe the process of depositing gold-black on thin, freestanding pyroelectric detector substrates and compare this with previous work documented in the literature. We have evaluated gold-black coatings on thin, freestanding pyroelectric detector

System-Level Calibration of a Transfer Radiometer Used to Validate EOS Radiance Scales

January 1, 2003
Author(s)
Bettye C. Johnson, Steven W. Brown, George P. Eppeldauer, Keith R. Lykke
A number of transfer radiometers have been developed by the National Institute of Standards and Technology (NIST) with the support and funding of the National Aeronautics and Space Administration's (NASA's) satellite sensor calibration programs. The

Spectral Responsivity Determination of a Transfer-Standard Pyroelectric Radiometer

December 1, 2002
Author(s)
George P. Eppeldauer, J Racz, Leonard M. Hanssen
A NIST-Developed pryoelectric radiometer was characterized and calibrated to extend the NIST high accuracy spectral responsively scale from the visible range to the ultraviolet (UV) and infrared (IR). The transmission of the gold-black coated LiNbO 3

Development of a Tunable LED-Based Colorimetric Source

August 1, 2002
Author(s)
Steven W. Brown, C Santana, George P. Eppeldauer
A novel, spectrally tunable light-source utilizing light emitting diodes (LED's) for radiometric, photometric, and colorimetric applications is described. The tunable source can simulate standard sources and can be used as a transfer sources and can be

A Reference Tristimulus Colorimeter

June 25, 2001
Author(s)
George P. Eppeldauer
The accuracy of tristimulus colorimeters can be increased by using detector standards instead of traditional lamp standards for calibration. After high accuracy absolute spectral response determination of the color channels, spectral and amplitude