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Dirty Headlamps – Efficiency of Headlamp Cleaning Devices and the Impact on Stray Light: Method and first results

Schiller, Christoph and Kosmas, Kyriakos and Kobbert, Jonas and Khanh, Tran Quoc
Khanh, Tran Quoc (ed.) :

Dirty Headlamps – Efficiency of Headlamp Cleaning Devices and the Impact on Stray Light: Method and first results.
In: International Symposium on Automotive Lighting (ISAL), 25.-27.09.2017, Darmstadt. In: Darmstädter Lichttechnik , 17 . München
[Conference or Workshop Item] , (2017)

Abstract

This paper presents selected results of a field study realized in February 2017 to test the effect of dirt on the headlamps on stray light as well as the necessity of headlamp cleaning devices (HCD). The results show that with an increasing amount of dirt on the surface of a headlamp the amount of light available below the cut-off (vison of the driver) is reduced in a distinct way. Therefore, the light level in the region above the cut-off is increased due to the scattering of light from below the cut-off. This effect is especially true for the region around the HV-point. It can be shown that the activation of a HCD reduces the amount of dirt on the headlamp surface especially for higher degrees of soiling.

Item Type: Conference or Workshop Item
Erschienen: 2017
Editors: Khanh, Tran Quoc
Creators: Schiller, Christoph and Kosmas, Kyriakos and Kobbert, Jonas and Khanh, Tran Quoc
Title: Dirty Headlamps – Efficiency of Headlamp Cleaning Devices and the Impact on Stray Light: Method and first results
Language: German
Abstract:

This paper presents selected results of a field study realized in February 2017 to test the effect of dirt on the headlamps on stray light as well as the necessity of headlamp cleaning devices (HCD). The results show that with an increasing amount of dirt on the surface of a headlamp the amount of light available below the cut-off (vison of the driver) is reduced in a distinct way. Therefore, the light level in the region above the cut-off is increased due to the scattering of light from below the cut-off. This effect is especially true for the region around the HV-point. It can be shown that the activation of a HCD reduces the amount of dirt on the headlamp surface especially for higher degrees of soiling.

Title of Book: Proceedings of the 12th International Symposium on Automotive Lighting (ISAL), ISBN 978-3-8316-4671-5
Series Name: Darmstädter Lichttechnik
Volume: 17
Place of Publication: München
Uncontrolled Keywords: Glare Free High Beam, Headlamp cleaning Device (HCD), Stray Light
Divisions: 18 Department of Electrical Engineering and Information Technology
18 Department of Electrical Engineering and Information Technology > Institute for Electromechanical Design
18 Department of Electrical Engineering and Information Technology > Institute for Electromechanical Design > Light Technology
Event Title: International Symposium on Automotive Lighting (ISAL)
Event Location: Darmstadt
Event Dates: 25.-27.09.2017
Date Deposited: 08 Feb 2018 13:45
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