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Search Publications by: Thomas C Larason (Fed)

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Displaying 76 - 100 of 105

Method of Measuring Shunt Resistance of Photodiodes

January 1, 2001
Author(s)
P R. Thompson, Thomas C. Larason
A method of measuring the shunt resistance of diodes, specifically photodiodes, is examined and the procedure of how the method is implemented using LabVIEW is detailed. Rudimentary comparison with other accepted methods in industry is done. The

Sources of Uncertainty in UV Radiation Measurements

January 1, 2001
Author(s)
Thomas C. Larason, Christopher L. Cromer
Increasing commercial, scientific, and technical applications involving ultraviolet (UV) radiation has led to the demand for improved understanding of the performance of instrumentaion used to measure this radiation. There has been an effort by

Improved Near-Infrared Spectral Responsivity Scale

September 1, 2000
Author(s)
Ping-Shine Shaw, Thomas C. Larason, R Gupta, Steven W. Brown, Keith R. Lykke
A cryogenic radiometer-based system was constructed at the National Institute of Standards and Technology (NIST) for absolute radiometric measurements to improve detector spectral responsivity scales in the wavelength range from 900 nm to 1800 nm. In

Optical Characterization of Diffuser-Input Standard Irradiance Meters

September 1, 1998
Author(s)
George P. Eppeldauer, M Racz, Thomas C. Larason
Standard quality irradiance meters have been developed at the National Institute of Standards and Technology (NIST) to realize detector based spectral irradiance scale. The design criteria and the optical and radiometric characterization of diffuser-input