ASTM-E811:1995 Edition

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E811-95 Standard Practice for Measuring Colorimetric Characteristics of Retroreflectors Under Nighttime Conditions

Published By	Publication Date	Number of Pages
ASTM	1995	6

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Description

ASTM E811-95

Historical Standard: Standard Practice for Measuring Colorimetric Characteristics of Retroreflectors Under Nighttime Conditions

ASTM E811

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

ICS Code

ICS Number Code n/a

DOI: 10.1520/E0811-95

Additional information

Standard Title	E811-95 Standard Practice for Measuring Colorimetric Characteristics of Retroreflectors Under Nighttime Conditions
Published Code	ASTM
Publication Date	1995
Pages Count	6