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Search Publications by: Maria E. Nadal (Fed)

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Displaying 26 - 50 of 150

Report of the Key Comparison CCPR-K5 Spectral Diffuse Reflectance

October 2, 2013
Author(s)
Yoshihiro Ohno, Maria E. Nadal, Kenneth L. Eckerle, E. A. Early
This is an official report from Consultative Committee of Photometry and Radiometry (CCPR) on the Key Comparison CCPR-K5 spectral diffuse reflectance, conducted in the framework of CIPM Mutual Recognition Arrangement (MRA). 13 national laboratories

Statistical Methods for Analyzing Color Differences

June 2, 2011
Author(s)
Maria E. Nadal, Carl C. Miller, Hugh Fairman
Multi-valued measurands, such as spectral reflectance or transmission, tristimulus values, are usually analyzed by reducing the data to a single-valued parameter, such as color difference. The variations of sets of color differences are non-normal

Reflectance Factor Measurement Complications Due to Near Infrared Fluorescence

September 1, 2010
Author(s)
Maria E. Nadal, Carl C. Miller, Clarence J. Zarobila
The researchers at the National Institute of Standards and Technology (NIST) have found that the widely used orange and red color tiles unexpectedly exhibit near infrared fluorescence. An analysis of the effect this fluorescence component has on the

NIST Goniospectrometer for Surface Color Measurements

July 7, 2008
Author(s)
Maria E. Nadal, Gael Obein
The goniospectrometer at the National Institute of Standards and Technology (NIST) can measure the spectral reflectance of colored samples over a wide range of illumination and viewing angles. This capability is important for the colorimetric

Reference 0 /45 Colorimeter

May 12, 2008
Author(s)
Maria E. Nadal
The Optical Technology Division at the National Institute of Standards and Technology (NIST) has developed a new instrument designed to measure the surface color of reflective, non-fluorescent samples at a geometry of 0 illumination angle and 45 viewing

0:45 Surface Color

January 1, 2008
Author(s)
Maria E. Nadal, E A. Early, Robert R. Bousquet
This document, SP250-71 (2007), NIST Measurements Services: 0:45 Surface Color, describes the instrumentation, standards, and techniques used to measure the surface color of reflective, non-fluorescent materials at a 0:45 geometry, that is an irradiance

Development of Surgical Lighting for Enhanced Color Contrast

May 14, 2007
Author(s)
Maritoni A. Litorja, Steven W. Brown, Maria E. Nadal, David W. Allen, Alexander Gorbach
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 surroundings

NIST Measurement Services: Specular Gloss

May 15, 2006
Author(s)
Maria E. Nadal, E A. Early, E A. Thompson
This document describes the instrumentation, standards, and measurement techniques used at the National Institute of Standards and Technology (NIST) to measure specular gloss. The organization of this document is as follow. Section 1 describes the

Specular Gloss

January 1, 2006
Author(s)
Maria E. Nadal, E A. Early, E A. Thompson

New NIST Reference Goniospectrometer

August 1, 2005
Author(s)
Gael Obein, Robert R. Bousquet, Maria E. Nadal
Coatings can be classified by either their appearance, such as glitter, or by their function, such as corrosion protection. However, pigments are currently being manufactured with new and unique appearance attributes that can not be characterized by