IMPROVING THE STABILITY OF HEADLAMP AIM-USER GUIDELINES FINAL REPORT

HEADLAMP AIM INSPECTION AND ADJUSTMENT PROCEDURES ARE DISCUSSED. TWO MISALIGNMENT CONDITIONS, DOGTRACK AND FORE-AND-AFT HEADLAMP LOCATION ERRORS, CAUSE THE LONGITUDINAL AND TRANSVERSE AXLES OF THE VEHICLE AND HEADLIGHT SUPPORTING STRUCTURE NOT TO MATCH THE DIRECTION IN WHICH THE VEHICLE MOVES ON THE ROAD. HEADLAMP AIMING IS ACCOMPLISHED WITH ANY ONE OF FOUR BASIC TYPES OF AIMING DEVICES; VISUALLY, BY PROJECTING THE BEAMS AGAINST A SCREEN; VIEWING IT IN MINIATURE IN AN OPTICAL VIEWER; PHOTOMETRICALLY; OR BY DETERMINING THE MECHANICAL AXES OF THE LAMP. OTHER INSPECTION AND ADJUSTMENT PRACTICES WHICH SHOULD BE FOLLOWED ARE: LUBRICATION OF HEADLAMP MOUNTING AND ADJUSTING SCREWS; AIMING OF HEADLAMP SUPPORT AND AIM ADJUSTMENT; CAREFUL USE OF AIMING INSTRUMENTS. /HSL/

• Corporate Authors:

  Southwest Research Institute

  6220 Culebra Road, P.O. Drawer 28510
  San Antonio, TX  United States  78228-0510
• Authors:
  • Hemion, R H
  • Hull, R W
  • Cadena, D G
• Publication Date: 1972

Media Info

• Features: References;
• Pagination: 15 p.

Subject/Index Terms

• TRT Terms: Alignment; Headlamps; Inspection; Night visibility
• Subject Areas: Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00222159
• Record Type: Publication
• Source Agency: Highway Safety Literature
• Files: TRIS
• Created Date: Aug 5 1973 12:00AM