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Are Measurements for the Cut-Off Gradient of Head Lamps in Different Measurement Distances Possible?
Technical Paper
2000-01-0803
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SAE 2000 World Congress
Language:
English
Abstract
In combination with the discussion of a worldwide harmonized passing beam pattern of headlamps in Europe the question has been raised, at which distance between headlamp and photocell the cut-off, or rather the gradient, should be measured.
In principal for the measurement distance there are two positions under consideration:
- a10 m, because the aiming equipment is designed for a distance of the aiming screen at 10 m.
- b25 m, because in the relevant ECE-Regulations the required minimum distance for the photometric measurements is 25 m.
The determined gradients are different depending from the distance at which they are measured. This paper discusses the possibility to find a correlation between the measurement procedures carried out at different distances to get assessments of the same cut-off quality independent from the measurement distance.
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Authors
Topic
Citation
Manz, K., "Are Measurements for the Cut-Off Gradient of Head Lamps in Different Measurement Distances Possible?," SAE Technical Paper 2000-01-0803, 2000, https://doi.org/10.4271/2000-01-0803.Also In
References
- Federal Register 62 46 March 10 1997 10710 10730
- Lindae G. Improvements of Low-Beam Pattern by Use of Polyellipsoid Headlamps (PES) SAE Paper Number 85 0228 , Motor Vehicle Lighting, SAE PT 60 Society of Automotive Engineers 1996
- Lindae G. Optimum Size of Head lamps for the European Lower Beam SAE Paper Number 70 0390 , Motor Vehicle Lighting, SAE PT 60 Society of Automotive Engineers 1996
- Ernst Verbesserung der Lichtqualität von Kraftfahrzeugscheinwerfern ATZ 90 3 1988 143 153
- Kreysar D. Coon M.R.C. Wang B. Design of Reflector Optics for Visually Amiable Low beam Head lamps Paper Number 98002 Automotive Lighting Technology (SP-1323), SAE International Congress Detroit February 1999 7 11
- Pollack W. Position and Quality of the Cut-Off in the Luminous Intensity Distribution of Automobile Headlamps ATZ worldwide 24 28 ATZ 100 1 1998 58 64
- Schmidt-Clausen H. J. Methoden zur Bestimmung der Lage von Hell-Dunkel-Grenzen CIE - Congress 1979 Kyoto 1979
- CIE Technical Committee TC 4 - 10 Definition of the CUT-Off of Vehicle Headlights CIE Draft Publication 3 October 1992 Vienna 1993
- Schmidt-Clausen H.J. Bewertung der Hell-Dunkel-Grenze bezüglich ihrer Qualität und Linearität Proceedings of PAL Symposium, Progress in Automobile Lighting 26. - 27 September 1995 Darmstadt 1995
- Rendu R. Proposition d'une méthode objective pour la détermination de la position de la coupure d'un faisceau croisement Réalisation practique d'n appareillage 1986
- De Brabander L. Description of a determination methode of the cut-off in a low beam GRE Meeting 1986
- Zdunczyk Untersuchung zur Schärfe der Hell-Dunkel-Grenze Diplomarbeit, University Aachen September 1997
- Westermann H. Working Document of GTB-working party “Savety and Visual Performance” (SVP) “Cutoff-definition and sharpness in Regulation No “00””
- Sivak M. Flannagan M. Chandra D. Gellaty A. W. Visual Aiming of European and U.S. Low-Beam Headlamps Report N0. UMTRI-91-34 University of Michigan September 1991
- SAE “Harmonized Vehicle Headlamp Performance Requirements” SAE Standard J 1735
- CIE Methods of Characterizing Illuminance Meters and Luminance Meters CIE- Publication No. 69 Central Bureau of the CIE Vienna 1987
- NHTSA Final Summary Minutes Headlamp Regulatory Negotiation October 18 19 1995
- Press W. H. et all Numerical Reciepes in C Cambridge University Press Cambridge 1992