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19.2: Asymmetrical TIR Lens Design for Compact and Coplanar Automotive Daytime Running Lights
Author(s) -
Zhang JainHong,
Chen KuanYu,
Cheng YaoChien,
Wang Alex
Publication year - 2012
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/j.2168-0159.2012.tb05761.x
Subject(s) - lens (geology) , daytime , reflector (photography) , automotive industry , optics , engineering , physics , electrical engineering , light source , aerospace engineering , atmospheric sciences
An asymmetrical TIR lens design, which brings compact and coplanar advantages for automotive daytime running lights (DRLs), is presented. On the basis of fulfilling the regulation (UNECE Regulation No. 87) by a single oval TIR lens, the DRL module can be made compactly and of any coplanar arrangement, e.g., linear or round arrangements. Besides, the oval TIR lens design also has the advantages of depressed‐elliptical angular intensity distribution, which is 99% correlated to the regulation standard values, and high utilization efficiency of 59.4%. The values of the traditional reflector type DRLs are 90% and 46%, respectively.