Tunable liquid lens with reduced aberration

Details Tunable liquid lens with reduced aberration Tunable liquid lens with reduced aberration

2009-02-25

2011-12-06

Ullah, Akm (Department: 2874)

Liquid crystal cells, elements and systems

Liquid crystal optical element

Liquid crystal lenses other than for eyewear

C348S349000, C396S089000

Reexamination Certificate

active

08072574

ABSTRACT:
A tunable optical imaging system uses a fixed lens and a tunable liquid crystal lens that is operated only outside of an operational range of high aberration. A voltage range applied to change the optical power of the liquid crystal lens is limited to a continuous tunable range of low aberration. The relative positioning between the lens and a corresponding photodetector, and the relative lens powers of a fixed lens and the tunable lens, may be selected to compensate for any optical power offsets resulting from the limitation of the voltage range of the tunable lens. The lens may be operated in either positive tunability or negative tunability mode.

REFERENCES:
patent: 4190330 (1980-02-01), Berreman
patent: 6859333 (2005-02-01), Ren et al.
patent: 6864951 (2005-03-01), Ren et al.
patent: 7218375 (2007-05-01), Galstian et al.
patent: 7394498 (2008-07-01), Takaoka
patent: 7724347 (2010-05-01), Tseng et al.
patent: 7859640 (2010-12-01), Galstian et al.

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