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Title: AN INSTRUMENT FOR PRECISION PHOTOMETRY OF REFLEX REFLECTIVE MATERIALS
Accession Number: 00220225
Record Type: Component
Abstract: A PHOTOMETER HAS BEEN DEVELOPED WHICH IS THE FIRST PORTABLE TESTING INSTRUMENT WHOSE MEASUREMENTS CORRELATE COMPLETELY WITH FULL-SCALE LABORATORY DATA AND ACTUAL HIGHWAY CONDITIONS. IT PROVIDES ACCURATE MEASUREMENT OF PERFORMANCES AT DISCRETE VIEWING ANGLES THROUGHOUT THE RANGE OF MODERN REFLECTOR USAGE. THE BASIC COMPONENTS OF THE PHOTOMETER ARE (1) A LIGHT SOURCE TO ILLUMINATE THE REFLECTOR, (2) A PHOTOELECTRIC RECEIVER TO MEASURE THE INTENSITY OF THE REFLECTED BEAM AT DISCRETE OBSERVATION ANGLES AND CONVERTS THESE MEASUREMENTS TO SPECIFIC INTENSITY VALUES WHICH ARE INDICATED ON A GALVANOMETER, AND (3) A GONIOMETER ON WHICH THE TEST REFLECTOR IS MOUNTED.
Supplemental Notes: No 298, pp 74-76. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
Monograph Title: Monograph Accession #: 01410681
Authors: Nagel, R ITroccoli, A MPagination: 3p
Publication Date: 1961
Serial: Conference:
40th Annual Meeting of the Highway Research Board
Location:
Washington DC, United States Media Type: Digital/other
Old TRIS Terms: Subject Areas: Highways; Safety and Human Factors
Files: TRIS, TRB
Created Date: Aug 12 1994 12:00AM
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