ASTM-E811 › Historical Revision Information
Standard Practice for Measuring Colorimetric Characteristics of Retroreflectors Under Nighttime Conditions
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Scope
1.1 This practice describes the instrumental determination of retroreflected chromaticity coordinates of retro- reflectors. It includes the techniques used in a photometric range to measure retroreflected (nighttime) chromaticity with either a telecolorimeter or telespectroradiometer.
1.2 This practice covers the general measurement procedures. Additional requirements for specific tests and specifications are described in Section 7.
1.3 The description of the geometry used in the nighttime colorimetry of retroreflectors is described in Practice E808 and the methods for calculation of chromaticity are contained in Test Method E308.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Keywords
chromaticity; retroreflector
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Document Number
ASTM-E811-81(1987)e1
Revision Level
1981 R87(E1) EDITION
Status
Superseded
Modification Type
Revision
Publication Date
April 24, 1981
Document Type
Practice
Page Count
6 pages
Committee Number
E12.10