Abstract

To eliminate the rainbow phenomenon of white LED sources caused by optical dispersion in a motorcar’s headlamp with a thick lens, we propose an LED high-beam headlamp based on free-form microlenses. The free-form microlenses include total reflection surfaces, which collimate the beams emitting from the LED source, and microlens structures, which redistribute the collimated beams to the target plane. We optimize the map relationship between the LED source and the illumination plane according to ECE regulation R112. Simulation and experiment results show that our proposed free-form microlenses could efficiently distribute light radiated from the LED source. All illumination on the test points and zones could reach ECE regulation R112. There is little dispersion in the light pattern in the target plane.

© 2014 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Design of a newly projected light-emitting diode low-beam headlamp based on microlenses

Hong Wang, Xiang Wang, Yang Li, and Peng Ge
Appl. Opt. 54(7) 1794-1801 (2015)

Modular design of the LED vehicle projector headlamp system

Chi-Chang Hsieh, Yan-Huei Li, and Chih-Ching Hung
Appl. Opt. 52(21) 5221-5229 (2013)

High-energy-efficiency optical system for an LED-based headlamp architecture

Aiming Ge, Wei Wang, Zhengqing Du, Peng Qiu, Junwei Wang, and Jinlin Cai
Appl. Opt. 52(34) 8318-8323 (2013)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (13)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (9)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription