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Search Publications by: C Cameron Miller (Fed)

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Displaying 101 - 125 of 142

Absolute Alignment of the Reference Retroreflectometer at NIST

June 1, 2003
Author(s)
Carl C. Miller
The National Cooperative Highway Research Program (NCHRP Project 05-16) awarded The National Institute of Standards and Technology (NIST) a contract to develop a dedicated reference instrument for measuring retroreflective materials, and a calibration

Luminous Intensity of LEDs at NIST

October 1, 2001
Author(s)
Carl C. Miller, Yoshihiro Ohno
Calibration facilities and procedures for measurement of Averaged LED intensity using the detector-based method have been developed at the National Institute of Standards and Technology (NIST). The scale has been established on two standard photometers

Total Luminous Flux Calibrations of LEDs at NIST

August 1, 2001
Author(s)
Carl C. Miller, Yoshihiro Ohno
The total luminous flux (lumen) is one of the most important characteristics of Light Emitting Diodes (LEDs), and is commonly measured using integrating sphere photometers. Large variations of measurement results are reported among different manufacturers

Luminous Intensity Calibrations and Colorimetry of LEDs at NIST

July 1, 2001
Author(s)
Carl C. Miller, Yoshihiro Ohno
Light Emitting Diodes (LEDs) are unique light sources differing greatly from traditional lamps in terms of physical size, flux level, spectrum and spatial distribution. The transfer of photometric scales from luminous intensity standard lamps to LEDs is

Luminous Flux Calibrations of LEDs at NIST

May 1, 2001
Author(s)
Carl C. Miller, Yoshihiro Ohno
The total luminous flux (lumen) is one of the most important characteristics of Light Emitting Diodes (LEDs), and is commonly measured using integrating sphere photometers. Large variations of measurement results are reported among different manufacturers