Temporal coherence properties of laser modules used in headlamps determined by a Michelson interferometer-Reference-Cited by-同舟云学术

Temporal coherence properties of laser modules used in headlamps determined by a Michelson interferometer

Published:2020-11-23 Issue:6 Volume:9 Page:375-383
ISSN:2192-8584
Container-title:Advanced Optical Technologies
language:en
Short-container-title:

Author:

Popp Valerie¹,Ansorg Philipp²,Fleck Burkhard³,Neumann Cornelius⁴

Affiliation:

1. Entwicklung Innovationen Licht/Sicht , AUDI AG , Ingolstadt , Germany

2. Entwicklung Funktionen Licht , AUDI AG , Ingolstadt , Germany

3. SciTec – Präzision-Optik-Materialien, Ernst-Abbe-Hochschule Jena , Jena , Germany

4. Lichttechnisches Institut, Karlsruher Institut für Technologie , Karlsruhe , Germany

Abstract

Abstract In this work, an investigation of the temporal coherence properties of radiation which is emitted by laser modules integrated in headlamps is presented. The motivation for these measurements was difficulties concerning the field of classification for laser products which function as conventional headlamps. Based on an experimental setup including a Michelson interferometer, a goniophotometer and a spectrometer, coherence lengths of 92.5 and 147.0 μm are obtained for two different laser modules. The results show that the temporal coherence of the examined radiation is appreciably higher than the temporal coherence of conventionally produced white light. Therefore, at this point in time, laser modules used in headlamps cannot be considered as customary white light sources.

Publisher

Walter de Gruyter GmbH

Subject

Instrumentation,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials

Reference19 articles.

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2. C. Gut, V. Krstajic, and S. Berlitz, “Laserscheinwerfer: Vom Motorsport zur Serie,” Elektronik Automotive, no. 10, pp. 44–48, 2014.

3. K. Schulmeister and J. Daem, “Classification of laser illuminated light sources under IEC 60825-1 Edition 3,” in Proceeding of the International Laser Safety Conference. March 20-23, 2017 Atlanta, GA USA, Laser Institute of America, Ed., 2017, pp. 174–180.

4. DIN Deutsches Institut für Normung e. V. and VDE Verband der Elektrotechnik Elektronik Informationstechnik e. V. DIN EN 62471, Photobiologische Sicherheit von Lampen und Lampensystemen .

5. IEC International Electrotechnical Commission. IEC 60825-1 Edition 3.0, Safety of laser products – Part 1: Equipment classification and requirements .

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