Abstract

A pico projection system with electrically tunable optical zoom ratio adopting two liquid crystal (LC) lenses is first demonstrated. The projected image of the system is not only continuously focused, but also zoomed simultaneously by adjusting the focal lengths of LC lenses electrically. The related optical principle is discussed and a liquid-crystal-on-silicon (LCOS)-based pico projection system was used to demonstrate the designed concept. This study opens a new window in realizing pico projectors with electrically tunable optical zooms.

© 2012 IEEE

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References

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2011

H. C. Lin, M. S. Chen, Y. H. Lin, "A review of electrically tunable focusing liquid crystal lenses," Trans. Elect. Electron. Mater. 12, 234-240 (2011).

Y. H. Lin, M. S. Chen, H. C. Lin, "An electrically tunable optical zoom system using two composite liquid crystal lenses with a large zoom ratio," Opt. Express 19, 4714-4721 (2011).

2010

H. C. Lin, Y. H. Lin, "An electrically tunable focusing pico- projector adopting a liquid crystal lens," J. Jpn. Appl. Phys. 49, (2010).

H. C. Lin, Y. H. Lin, "A fast response and large electrically tunable-focusing imaging system based on switching of two modes of a liquid crystal lens," Appl. Phys. Lett. 97, (2010).

2008

2007

M. Ye, B. Wang, M. Kawamura, S. Sato, "Fast switching between negative and positive power of liquid crystal lens," Electron. Lett. 43, 474-476 (2007).

2006

B. Wang, M. Ye, S. Sato, "Liquid crystal lens with focal length variable from negative to positive values," IEEE Photon. Technol. Lett. 18, 79-81 (2006).

2005

M. Ye, S. Sato, "New method of voltage application for improving response time of a liquid crystal lens," Mol. Cryst. Liq. Cryst. 433, 229-236 (2005).

Y. H. Fan, H. Ren, X. Liang, H. Wang, S. T. Wu, "Liquid crystal microlens arrays with switchable positive and negative focal lengths," J. Display Technol. 1, 151-156 (2005).

2004

Appl. Opt.

Appl. Phys. Lett.

H. C. Lin, Y. H. Lin, "A fast response and large electrically tunable-focusing imaging system based on switching of two modes of a liquid crystal lens," Appl. Phys. Lett. 97, (2010).

Electron. Lett.

M. Ye, B. Wang, M. Kawamura, S. Sato, "Fast switching between negative and positive power of liquid crystal lens," Electron. Lett. 43, 474-476 (2007).

IEEE Photon. Technol. Lett.

B. Wang, M. Ye, S. Sato, "Liquid crystal lens with focal length variable from negative to positive values," IEEE Photon. Technol. Lett. 18, 79-81 (2006).

J. Display Technol.

J. Jpn. Appl. Phys.

H. C. Lin, Y. H. Lin, "An electrically tunable focusing pico- projector adopting a liquid crystal lens," J. Jpn. Appl. Phys. 49, (2010).

Mol. Cryst. Liq. Cryst.

M. Ye, S. Sato, "New method of voltage application for improving response time of a liquid crystal lens," Mol. Cryst. Liq. Cryst. 433, 229-236 (2005).

Opt. Express

Trans. Elect. Electron. Mater.

H. C. Lin, M. S. Chen, Y. H. Lin, "A review of electrically tunable focusing liquid crystal lenses," Trans. Elect. Electron. Mater. 12, 234-240 (2011).

Other

D. Armitage, I. Underwood, S. T. Wu, Introduction to Microdisplays (Wiley, 2006).

E. H. Stupp, M. S. Brennesholtz, Projection Display (Wiley, 1999).

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