SPHERICAL LENS OPTICS APPLIED TO RETRODIRECTIVE REFLECTION

THIS PAPER DESCRIBES SOME EXPEDIENT APPLICATIONS OF ELEMENTARY OPTICAL PRINCIPLES TO THE EVALUATION OF GLASS-BEAD REFLECTORIZING SYSTEMS FOR HIGHWAY SIGNS AND MARKERS. THE OPTICAL FUNCTION OF SPHERICAL LENSES IN ACHIEVING REFLEX REFLECTION IS ILLUSTRATED BOTH PHOTOGRAPHICALLY AND DIAGRAMMATICALLY. VARIOUS OPTICAL DESIGNS ARE DISCUSSED AND ANALYZED. BY SIMPLE GEOMETRIC OPTICS, THE EFFICIENCY OF THESE SYSTEMS IS CORRELATED WITH THE PRACTICAL PERFORMANCE CRITERIA FOR RETRODIRECTIVE REFLECTORIZATION. /AUTHOR/

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/hrbbulletin/56/56-005.pdf
• Supplemental Notes:
  • No 56, pp 66-77, 9 FIG, 4 REF 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
• Authors:
  • Havens, James H
  • Peed Jr, Allie C
• Publication Date: 1952

Media Info

• Monograph Title: Night visibility
• Serial:
  • Highway Research Board Bulletin
  • Issue Number: 56
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Glass; Lenses (Geology); Optics; Reflectorized materials; Road markings; Traffic signs
• Old TRIS Terms: Beading; Lenses (Excluding soils); Reflectorization; Traffic marking
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00216664
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Apr 28 1994 12:00AM