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You searched on: Author: howard yoon

Displaying records 111 to 120 of 125 records.
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111. A Comparison of ITS-90 and Detector-Based Scales Between NPL and NIST Using Metal-Carbon Eutectics
Published: Date unknown
Authors: Graham Machin, Charles E Gibson, D L Lowe, David W Allen, Howard W Yoon
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841844

112. AC-Mode SW-IR Radiation Thermometers for Measurement of Ambient Temperatures
Published: Date unknown
Authors: George P Eppeldauer, Howard W Yoon
Abstract: Recent improvements in the fabrication technology of short-wave infrared (SWIR) quantum detectors opened a new era in radiation thermometry. Ambient and higher temperatures can be measured with low uncertainties using thermoelectrically (TE) cooled e ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841068

113. Absolute Flux Calibrations of Stars
Published: Date unknown
Authors: Gerald T Fraser, Steven W Brown, Howard W Yoon, Bettye C Johnson, Keith R Lykke
Abstract: Absolute stellar photometry is based on 1970s terrestrial measurements of the star Vega referenced against the Cu fixed-point blackbody. Significant advances in absolute radiometry have been made in the last 30 years that offer the potential to impro ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841110

114. Determination of Radiance Temperatures Using Detectors Calibrated for Absolute Spectral Power Responsivity
Published: Date unknown
Authors: Howard W Yoon, Charles E Gibson
Abstract: Our current spectral radiance and irradiance scales are derived from the radiance temperature determination of a blackbody at the freezing point of gold (GPBB) at 1337.33 K. The standard lamps disseminated for spectral irradiance have spectral output ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841515

115. Non-Contact Temperature Measurements of Micro-Scale Phenomena
Published: Date unknown
Author: Howard W Yoon
Abstract: Imaging trying to make temprature measurements in a spatial region equal to the edge of a printer paper or within the diameter of a strand of hair. The accurate computer modeling of the machining process requires measurements of the thermodynamic tem ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841508

116. Performance Comparisons of InGaAs, Extended InGaAs and Short-Wave HgCdTe Detectors Between 1 [mu]m and 2.5 [mu]m
Published: Date unknown
Authors: Howard W Yoon, Matt Dopkiss, George P Eppeldauer
Abstract: In this study, three different detectors, regular InGaAs, short-wave infrared extended-InGaAs (exInGaAs) with the bandgap wavelength at 2.6 mm and short-wave HgCdTe (swMCT) with the bandgap wavelength at 2.8 mm are studied. The detectors have active ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841047

117. Portable LED-Illuminated Radiance Source
Published: Date unknown
Authors: David W Allen, G Dezsi, Howard W Yoon
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841811

118. SSE- and Noise-Optimized InGaAs Radiation Thermometer
Published: Date unknown
Authors: Howard W Yoon, Charles E Gibson, V B Khromchenko, George P Eppeldauer
Abstract: For the measurements of radiance temperatures in the range from 150 ?C to 1000 ?C, low uncertainties in the temperature measurements can be achieved by using near-infrared InGaAs radiation thermometers. We describe the design and construction of the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841126

119. Spectroradiometric Sources
Published: Date unknown
Authors: Howard W Yoon, Charles E Gibson
Abstract: rth climate modeling and global impacts of particles and gases in the atmosphere are some of the studies that benefit from the use of spectroradiometers calibrated for spectral irradiance. Spectral irradiance is the optical power incident per unit ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841555

120. Temperature Determination of the Ag-and Au-Freezing Points Using a Detector-Based Radiation Thermometer
Published: Date unknown
Authors: Howard W Yoon, David W Allen, Charles E Gibson, Maritoni Abatayo Litorja, Robert D. Saunders, Steven W Brown, George P Eppeldauer, Keith R Lykke
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841855



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