A light guide fully composed of reflective plate has been proposed for a planar illuminator with the light source located at the side edge. Using mirror reflection as the light guiding mechanism increases the light acceptance angle of the light guide, and the hollow structure allows increasing the source coupling area without inducing further weight. Accompanying with the optical films, for example, a diffuser, a prismatic film, and a reflective polarizer to spread light distribution, the uniformity of the prototype has shown the feasibility for a planar illuminator.
© 2008 Optical Society of America
Original Manuscript: October 1, 2007
Revised Manuscript: January 3, 2008
Manuscript Accepted: January 8, 2008
Published: February 20, 2008
Chung-Feng Chen, Hsiao-Ting Wang, and Cheng-Huan Chen, "High throughput reflective light guide for planar illuminator," Appl. Opt. 47, 784-791 (2008)