@article{ref1,
title="Proposal for standard U.S. headlamp beam pattern for evaluation of retroreflection",
journal="Transportation research record",
year="1994",
author="Szczech, Theodore J. and Chrysler, Susan T.",
volume="1456",
number="",
pages="91-98",
abstract="Confusion arises among researchers and designers when different headlamp output data files are used to produce luminance profiles of retroreflective sheeting. It is proposed that a standard U.S. headlamp data file be established to reduce confusion and improve communication among researchers in the area of retroreflective materials. A composite 15th percentile headlamp data file for calculating luminance values for which 85% of sampled headlamps produce equal or greater luminance is offered. The calculation of luminance depends on headlamp performance and retroreflector characteristics. Use of this 15th percentile headlamp is justified by comparison of luminance values calculated for enclosed lens sheeting for various headlamp data files. This reference headlamp is intended as a standard for retroreflective material research. It is not intended to be a design target for the development or testing of new headlamps. The headlamp data file is available on request.    Record URL:   http://onlinepubs.trb.org/Onlinepubs/trr/1994/1456/1456-011.pdf<p /> <p>Language: en</p>",
language="en",
issn="0361-1981",
doi="",
url="http://dx.doi.org/"
}