Title :
An electrically tunable LCOS pico projector with optical zoom
Author :
Chen, Ming-Syuan ; Lin, Hung-Chun ; Lin, Yi-Hsin
Author_Institution :
Dept. of Photonics, Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
An electrically tunable zooming LCOS pico projector using composite liquid crystal (LC) lenses is demonstrated. The composite LC lens consists of two built-in sub-lenses: one is an electrically tunable focusing lens controlled by a LC layer and the other is a fixed focused polymeric lens. The zoom ratio of the electrically tunable zooming pico projector can reach 2.5:1 when the screen distance at 20 cm. The tunable focusing ranges are 200 cm to ~10 cm and the response times is around 3.8 sec. The image performance of the electrically tunable focusing LCOS pico projector is also demonstrated.
Keywords :
lenses; liquid crystals; optical focusing; optical projectors; composite liquid crystal lenses; distance 200 cm to 10 cm; electrically tunable LCOS pico projector; electrically tunable focusing lens; fixed focused polymeric lens; optical zoom; Focusing; Lenses; Liquid crystal on silicon; Optical imaging; Optical polarization; Optical sensors; Polymers;
Conference_Titel :
Photonics Conference (PHO), 2011 IEEE
Conference_Location :
Arlington, VA
Print_ISBN :
978-1-4244-8940-4
DOI :
10.1109/PHO.2011.6110625
