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You searched on: Author: david allen

Displaying records 31 to 40 of 67 records.
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31. Holmium Oxide Glass Wavelengths Standards
Series: Journal of Research (NIST JRES)
Published: 1/1/2008
Author: David W Allen
Abstract: Holmium oxide glass has been used as a wavelength standard for over four decades. These standards have shown very little variation from batch to batch and from one manufacturer to another. NIST has certified and recertified holmium oxide glass samp ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841100

32. Dynamically Programmable Digital Tissue Phantoms
Published: 12/31/2007
Authors: Steven W Brown, Joseph Paul Rice, David W Allen, Maritoni Abatayo Litorja, Karel Zuzak, Edward Livingston
Abstract: As optical imaging modalities gain acceptance for medical diagnostics and become common in clinical applications, standardized protocols to quantitatively assess optical sensor performance are required to ensure commonality in measurements and to val ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905502

33. Evaluation of a Portable Hyperspectral Imager for Medical Imaging Applications
Published: 10/2/2007
Authors: David W Allen, Maritoni Abatayo Litorja, Steven W Brown, Joseph Paul Rice, Yuqin Zong
Abstract: Portable hyperspectral imagers are becoming commonly available as a commercial product. A liquid crystal tunable filter based CCD imager was evaluated and characterized for spectral stray light using a tunable laser facility. The hyperspectral imag ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841115

34. Thermodynamic-Temperature Determinations of the Ag and Au Freezing Temperatures Using a Detector-Based Radiation Thermometer
Published: 5/20/2007
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
Abstract: We describe the development of a radiation thermometer calibrated for spectral radiance responsivity using cryogenic, electrical-substitution radiometry to determine the thermodynamic temperatures of the Ag- and Au-freezing temperatures. The absolut ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=840978

35. Development of Surgical Lighting for Enhanced Color Contrast
Published: 5/14/2007
Authors: Maritoni Abatayo Litorja, Steven W Brown, Maria E Nadal, David W Allen, Alexander Gorbach
Abstract: The National Institute of Standards and Technology and the National Institutes of Health have started a collaborative study on the development of lighting that will provide enhanced, specific to various tissues, contrast with respect to its surroundi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841075

36. Methods to Reduce the Size-of-Source Effect in Radiation Thermometers
Published: 4/1/2005
Authors: Howard W Yoon, David W Allen, Robert D. Saunders
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841848

37. Methods to reduce the size-of-source effect in radiometers
Published: 1/1/2005
Authors: David W Allen, Robert D. Saunders, Howard W Yoon
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=100951

38. A comparison of ITS-90 and a detector-based scale between NPL and NIST using metal-carbon eutectics
Published: 1/1/2004
Authors: David W Allen, Charles E Gibson, D L Lowe, Graham Machin, Howard W Yoon
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=104298

39. Comparison of the NIST radiance temperature scale with the detector-based radiance temperature scale from 1200 K to 2800 K
Published: 1/1/2004
Authors: David W Allen, George P Eppeldauer, Charles E Gibson, Howard W Yoon
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=104294

40. Methods to reduce the size-of-source effect in radiation thermometers
Published: 1/1/2004
Authors: David W Allen, Robert D. Saunders, Howard W Yoon
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=104296



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