An Electrically Tunable Focusing Pico-Projector Adopting a Liquid Crystal Lens

被引：51

作者：

Lin, Hung-Chun ^{[1
]}

Lin, Yi-Hsin ^{[1
]}

机构：

[1] Natl Chiao Tung Univ, Dept Photon, Hsinchu 30010, Taiwan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2010年 / 49卷 / 10期

关键词：

FOCAL LENGTH; MICROLENS ARRAY; VOLTAGE; SIZE;

D O I：

10.1143/JJAP.49.102502

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

An electrically tunable pico-projector adopting a liquid crystal (LC) lens as an active optical element is demonstrated. The focal length of this pico-projector is electrically tunable from 350 to 14 cm and the tunable range is even wider than that of a manually focused pico-projector. The response times of turn-on and turn-off are approximately 313 and 880 ms, respectively. In addition, the location of the projection lens can affect the electrically tunable range of the system. A small shift of the projection lens results in the large tunable focusing range of the pico-projector and a tunable focusing range is determined by the LC lens. The optical analysis is also discussed. This concept can even be applied to design other electrically auto focusing pico-projectors based on other optical elements such as liquid lenses and spatial light modulators. (C) 2010 The Japan Society of Applied Physics

引用

页码：1025021 / 1025025

页数：5

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