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Author: howard yoon
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Displaying records 101 to 110 of 118 records.
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101. A 400 nm to 2500 nm Absolute Spectral Radiance Comparison Using Filter Radiometers
Published: 10/1/1998
Authors: Howard W Yoon, Bettye C Johnson, D Kelch, S F Biggar, P R Spyak
Abstract: An integrating sphere source developed by MTL Systems, Inc. was calibrated for them by a commercial standards laboratory traceable to the National Institute of Standards and Technology (NIST), resulting in values of spectral radiance in the 400 nm to ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841260

102. A 400 nm to 2500 nm Absolute Spectral Radiance Comparison using Filter Radiometers
Published: 1/1/1998
Authors: Howard W Yoon, Bettye C Johnson, D Kelch, S F Biggar, P R Spyak
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=104277

103. 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

104. 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

105. 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

106. 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

107. Flow Visualization of Heated CO2 Gas Using Thermal Imaging
Published: Date unknown
Authors: Howard W Yoon, Joseph Paul Rice, John G Gillen
Abstract: Walk-through portal detection systems are being developed to screen passengers for the presence of explosives in support of homeland security. These portals utilize a series of air-jets to remove the explosive particles for detection using ion mobil ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841020

108. 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

109. 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

110. 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



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