Innovative coupler design based on a tapered light pipe with lens

• 作 者: 黄忠傽 赵世民 周俊翰 林家民 张政民 张凯全 王忠蔚
• 机 构: Department of Electronic Engineering,National Taiwan University of Science and Technology,Graduate I
• 出 处: Chinese Optics Letters
• 发表日期: 2013年12期
• 关键词: coupler viewing illumination letter combine reaches pipe interior toward innovat

Natural light illumination system(NLIS)generates increasing research interest because of the recent trend toward green energy.Various crucial optical components used in a NLIS are analyzed,designed,and fabricated to obtain high ef f iciency.A large amount of light is loss because of the large viewing angle during light transmission.A tapered light pipe(TLP)is used to collimate light viewing angles.In this letter,we combine a TLP and a traditional lens as a new coupler based on Etendue theory.The original ef f iciency is only 17.54%,but the ef f iciency reaches more than 70%when the new coupler is applied.

Natural light illumination system (NLIS) generates increasing research interest because of the recent trend toward green energy .Various crucial optical components used in a NLIS are analyzed, designed, and fabricated to obtain high ef f iciency. A large amount of light is loss because of the large viewing angle during light transmission. A tapered light pipe (TLP) is used to collimate light viewing angles. In this letter, we combine a TLP and a traditional lens as a new coupler based on Etendue theory. The original ef ficiency is only only 17.54%, but the ef f iciency reaches more than 70% when the new coupler is applied.