Abstract

Standard nonimaging components used to collect and integrate light in light-emitting-diode-based projector light engines such as tapered rods and compound parabolic concentrators are compared to optimized freeform shapes in terms of transmission efficiency and spatial uniformity. We show that the simultaneous optimization of the output surface and the profile shape yields transmission efficiency within the étendue limit up to 90% and spatial uniformity higher than 95%, even for compact sizes. The optimization process involves a manual study of the trends for different shapes and the use of an optimization algorithm to further improve the performance of the freeform lightpipe.

© 2008 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Method to improve spatial uniformity with lightpipes

Florian Fournier, William J. Cassarly, and Jannick P. Rolland
Opt. Lett. 33(11) 1165-1167 (2008)

High efficiency pocket-size projector with a compact projection lens and a light emitting diode-based light source system

Jui-Wen Pan, Sheng-Han Tu, Chih-Ming Wang, and Jenq-Yang Chang
Appl. Opt. 47(19) 3406-3414 (2008)

Integral freeform illumination lens design of LED based pico-projector

Shuang Zhao, Kai Wang, Fei Chen, Zong Qin, and Sheng Liu
Appl. Opt. 52(13) 2985-2993 (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 (15)

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

Equations (8)

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