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Displaying records 31 to 40 of 125 records.
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31. Development of in-situ calibration method for current-to-voltage converters for high-accuracy SI-traceable low-DC-current measurements
Published: 9/20/2013
Authors: George P Eppeldauer, Howard W Yoon, Dean G Jarrett, Thomas C Larason
Abstract: For photocurrent measurements with low uncertainties, wide-dynamic range reference current-to-voltage converters and a new converter calibration method have been developed at the National Institute of Standards and Technology (NIST). The high feedba ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914149

32. Dispersive Methods
Published: 7/1/2014
Authors: Arnold A. Gaertner, Howard W Yoon, Thomas Avery Germer
Abstract: Chapter 3 will discuss dispersive means of obtaining spectral resolution in spectrophotometry. These methods are used to spatially disperse or separate the various wavelengths of optical electromagnetic radiation to enable analysis of material proper ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915685

33. EMPS: Radiation Thermometer Designs
Published: 7/1/2010
Authors: Howard W Yoon, George P Eppeldauer
Abstract: Since the publication of the ,Theory and Practice of Radiation ThermometryŠ in 1988, the designs of radiation thermometers have undergone drastic changes. With the exception of few industries, the disappearing filament pyrometers are not commonly us ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902367

34. Establishment and application of the 0/45 reflectance factor scale over the shortwave infrared
Published: 4/1/2015
Authors: Catherine C Cooksey, David W Allen, Benjamin K Tsai, Howard W Yoon
Abstract: This paper describes the establishment and application of the 0/45 reflectance factor scale in the shortwave infrared (SWIR) from 1100 nm to 2500 nm. Design, characterization, and the demonstration of a 4-stage, extended indium-gallium-arsenide radi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=917390

35. Evaluation of Thermal Imaging Cameras
Published: 10/1/2008
Authors: Francine K. Amon, Andrew J. Lock, Nelson P Bryner, Joseph Paul Rice, Howard W Yoon
Abstract: Four thermal infrared cameras that were provided by Bureau of Industry and Security (BIS) to NIST were each evaluated by the NIST Optical Technology Division (OTD) for three metrics: Noise-equivalent Temperature Difference (NETD), Minimum Detectable ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900887

36. Extension of the NIST spectral power-responsivity calibration service to 2500 nm
Published: 3/2/2012
Authors: George P Eppeldauer, Howard W Yoon, Jinan Zeng, Thomas C Larason, Jeanne M Houston, Vladimir Khromchenko
Abstract: The National Institute of Standards and Technology (NIST) is working to extend the upper wavelength limit of the spectral power-responsivity calibration service from 1800 nm to 2500 nm. This extension is based on extended-InGaAs (EIGA) transfer- and ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910010

37. Extension of the NIST spectral responsivity scale to the infrared using improved-NEP pyroelectric detectors
Published: 6/2/2009
Authors: George P Eppeldauer, Jinan Zeng, Howard W Yoon, Boris Wilthan, Thomas C Larason, Leonard M Hanssen
Abstract: Routine NIST spectral responsivity calibrations are needed for the infrared range. Low NEP pyroelectric radiometers have been developed for traditional monochromator applications to extend the responsivity scale to the infrared. After NEP tests, the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900961

38. FASCAL 2: A New NIST Facility for the Calibration of the Spectral Irradiance of Sources
Published: 2/1/2003
Authors: Howard W Yoon, J E Proctor, Charles E Gibson
Abstract: The Facility for Automated Spectroradiometric Calibrations (FASCAL) is the primary facility for spectral irradiance and spectral radiance calibrations at NIST and has been in continous use since the early 1970's. Due to the increasing demands for sp ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841660

39. FASCAL 2: A New NIST Facility for the Spectral Irradiance Calibrations of Sources
Published: 1/1/2003
Authors: Howard W Yoon, J E Proctor, Charles E Gibson
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=104270

40. Fast and Reliable Spectral Response Measurements of PV Cells Using Light Emitting Diodes
Published: 1/1/2014
Authors: Behrang H Hamadani, John F Roller, Brian P Dougherty, Howard W Yoon
Abstract: We present a measurement system for absolute differential spectral responsivity of solar cells based on high-powered LED arrays coupled to an optical light guide capable of large area illumination. Two different measurement techniques were developed ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913952



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