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ASTM E808-23

Current Revision

Standard Practice for Describing Retroreflection

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1.1 This practice covers terminology, alternative geometrical coordinate systems, and procedures for designating angles in descriptions of retroreflectors, specifications for retroreflector performance, and measurements of retroreflection.

1.2 Terminology defined herein includes terms germane to other ASTM documents on retroreflection.

1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


4.1 This practice applies to any measurement of reflectance in which the angle at the sample between the direction of the incident radiation and the direction of viewing is less than approximately 10°, and the reflected radiation is concentrated in a direction opposite to the direction of incidence.

4.2 The CIE (goniometer) system described in 6.1.1 was developed by the Subcommittee on Retroreflection of Committee 2.3 on Materials of the International Commission on Illumination (Commission International de l'Eclairage, CIE). It is intended to provide a common basis for the measurement of retroreflection, which should be used worldwide.

4.3 This practice provides alternative geometric coordinate systems useful for visualizing relationships between various angles in actual use.

SDO ASTM: ASTM International
Document Number E808
Publication Date Dec. 1, 2023
Language en - English
Page Count 10
Revision Level 23
Supercedes
Committee E12.10
Publish Date Document Id Type View
Dec. 1, 2023 E0808-23 Revision
Dec. 10, 2001 E0808-99A Revision
Dec. 10, 2001 E0808-01 Revision
Jan. 1, 2016 E0808-01R16 Reaffirmation
Feb. 1, 2009 E0808-01R09 Reaffirmation