THE 'RAINBOW' METHOD FOR THE MEASUREMENT OF THE REFRACTIVE INDEX OF GLASS BEADS

A new method is discussed for measuring the refractive index of glass beads used to increase the retro-reflectivity of highway signs and traffic markings. The method, based on the same principle as the formation of the meteorological rainbow, is generally more accurate than conventional liquid immersion methods such as the Becke line method and is much faster to carry out. /Author/TRRL/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00410683
• Corporate Authors:

  Printerhall Limited

  29 Newmart Street
  London W1P 3PE,   England 
• Authors:
  • Smith, G
• Publication Date: 1977-10

Language

• English

Media Info

• Features: Figures; References;
• Pagination: p. 480-485
• Serial:
  • Traffic Engineering & Control
  • Volume: 18
  • Issue Number: 10
  • Publisher: Hemming Group, Limited
  • ISSN: 0041-0683
  • Serial URL: http://www.tecmagazine.com/

Subject/Index Terms

• TRT Terms: Electromagnetic spectrum; Glass beads; Mathematical models; Measurement; Methodology; Refraction; Refractivity; Retroreflectors; Road markings; Traffic signs
• Old TRIS Terms: Traffic marking
• ITRD Terms: 4548: Glass shot; 6473: Mathematical model; 6136: Measurement; 9102: Method; 6788: Refraction; 6776: Spectrum; 553: Traffic sign
• Subject Areas: Geotechnology; Highways; Materials; Operations and Traffic Management; I73: Traffic Control;

Filing Info

• Accession Number: 00170311
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Analytic
• Files: ITRD, TRIS, ATRI
• Created Date: Jun 28 1978 12:00AM