A polarized liquid crystal lens with electrically switching mode and optically written mode

A polarized liquid crystal (LC) lens composed of a LC layers as a polarization switch and a liquid crystal and polymer composites lens (LCPC lens) is demonstrated with electrically switching (ES) mode and optically rewritten (ORW) mode. The lens power of LCPC lens is related to a polarization state of light modulated by the LC layer whose orientations are manipulated either electrically or optically. As a result, the LC lens is not only electrically switchable, but also optically rewritable. Each mode, ES mode or ORW mode, exhibits two discrete lens powers (-1.39 Diopter and +0.7 Diopter). The demonstrated aperture size is 10 mm. The detail optical mechanism is also discussed. The Modulation Transfer Function (so-called MTF) of the lens is measured as well. In addition, the image performance and the dispersion of the LC lens are investigated. Such a polarized LC lens could be a special switch in optical systems due to dual operation modes.

[1]  X Q Wang,et al.  Liquid crystal Fresnel zone lens based on single-side-patterned photoalignment layer. , 2014, Applied optics.

[2]  C W Fowler,et al.  Liquid crystal lens review , 1990, Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians.

[3]  Susumu Sato.  Liquid-Crystal Lens-Cells with Variable Focal Length , 1979 .

[4]  Shin-Tson Wu,et al.  Introduction to Adaptive Lenses: Wu/Introduction to Adaptive Lenses , 2012 .

[5]  Yi-Hsin Lin,et al.  A large bistable negative lens by integrating a polarization switch with a passively anisotropic focusing element. , 2014, Optics express.

[6]  Hung-Chang Jau,et al.  Highly efficient and polarization-independent Fresnel lens based on dye-doped liquid crystal. , 2007, Optics express.

[7]  Yi-Hsin Lin,et al.  An endoscopic system adopting a liquid crystal lens with an electrically tunable depth-of-field. , 2013, Optics express.

[8]  Yi-Hsin Lin,et al.  Electrically tunable-focusing and polarizer-free liquid crystal lenses for ophthalmic applications. , 2013, Optics express.

[9]  P. Yeh.  Optics of Liquid Crystal Displays , 2007, 2007 Conference on Lasers and Electro-Optics - Pacific Rim.

[10]  Ming-Shian Li,et al.  Polarization-dependent optical tuning of focal intensity of liquid crystal polymer microlens array , 2011 .

[11]  Yi-Hsin Lin,et al.  An electrically tunable optical zoom system using two composite liquid crystal lenses with a large zoom ratio. , 2011, Optics express.

[12]  Hoi-Sing Kwok,et al.  Switchable Fresnel lens based on micropatterned alignment. , 2013, Optics letters.

[13]  Yi-Hsin Lin,et al.  Polarizer-free and fast response microlens arrays using polymer-stabilized blue phase liquid crystals , 2010 .

[14]  San-Yi Huang,et al.  All-optical controlling of the focal intensity of a liquid crystal polymer microlens array. , 2011, Applied optics.

[15]  Nasser N Peyghambarian,et al.  High-efficiency switchable flat diffractive ophthalmic lens with three-layer electrode pattern and two-layer via structures , 2007 .

[16]  Shin-Tson Wu,et al.  Introduction to Adaptive Lenses , 2012 .

[17]  Yi-Hsin Lin,et al.  A Review of Electrically Tunable Focusing Liquid Crystal Lenses , 2011 .

[18]  Vladimir G. Chigrinov,et al.  A polarized bifocal switch based on liquid crystals operated electrically and optically , 2015 .