A precise objective definition of low-beam visual cut-off is necessary, since a requirement for correct aiming of these beams is specified within all the existing regulations.
At present, aiming of low-beam headlamps is performed visually in Europe and USA (since 1997), using the cut-off line in the beam pattern. A good definition of a visual cut-off is required to allow uniformity in interpretations.
This report provides a survey of studies into low beam visual cut-off that have been carried out in Europe and North America. Based on these studies, a recommendation is made for the definition and measurement of the cut-off line of a low-beam headlamp by photometric means.
The publication is written in English, with a short summary in French and German. It consists of 19 pages with 6 figures.
The following members and advisors of TC 4-10 "Automobile Lighting Systems" took part in the preparation of this Technical Report:
Members:
- J.L. Banks, Great Britain
- J. Bergin, USA
- M.A.R. Bernhard, Switzerland
- J.Th. Bindels, The Netherlands
- L. de Brabander, Belgium
- M. Cejnek, Czech Republic
- G. Dorleans, France
- G.R. Draper, Great Britain
- A.J. Fisher, Australia
- G. Furlan, Italy
- K. Honda, Japan
- H.G. Hornig, Germany
- H. Löfgren, Sweden
- D. Moore, USA
- W. Pollack, Germany
- R. Rendu, France
- W.H.J. Sator, South Africa
- Chr. Schmidt, Germany
- H.J. Schmidt-Clausen, Germany
- N. Stepanov, Russian Federation
- G. Székács, Hungary
- F. Takata, Japan
- H. Westermann, Germany
- Tai-Ming Zhou, China
Advisors:
- Th. Althoff, Germany
- Rong An Liu, China
- V.D. Bhise, USA
- S. Holló, Hungary
- S. Ottó, Hungary
- B. Tansley, Canada
- J.G. White, Canada
- K. Yokoi, Japan
The final draft was prepared by:
- K. Manz, Germany
- A.C.M. de Visser, The Netherlands (chair from 2003)