An electrically tunable depth-of-field endoscope using a liquid crystal lens as an active focusing element

被引：1
作者：
Chen, Hung-Shan [1 ]
Chen, Ming-Syuan [1 ]
Lin, Yi-Hsin [1 ]
机构：
[1] Natl Chiao Tung Univ, Dept Photon, Hsinchu 30010, Taiwan
来源：
LIQUID CRYSTALS XVII | 2013年 / 8828卷
关键词：
Liquid Crystal Lens; Endoscope; Depth of field; DOF;
D O I：
10.1117/12.2025379
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
An electrically tunable depth-of-field (DOF) endoscope using a liquid crystal lens (LC lens) as an active focusing element is demonstrated. The optical mechanism of the electrically-tunable DOF endoscope adopting a two-mode switching LC lens is introduced. The two-mode switching LC lens provides not only a positive lens power but also a negative lens power. Therefore, we could extend the range of DOF originally from 27 mm similar to 55 mm to 12.4 mm similar to 76.4 mm by using the two-mode switching LC lens as an active focusing element. The detail derivations of the optical mechanism of the endoscopic system adopting a LC lens are invistgated. The more detail experimental results are demonstrated. We believe this study can provide a more detail understanding of an endoscopic system adopting a tunable focusing lens.
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页数：11
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