Liquid crystal based continuous phase retarder: from optically neutral to a quarter waveplate in 200 microseconds

Broughton, Benjamin J.; Clarke, Matthew J.; Betts, R.A.; Bricheno, T.; Coles, H. J.

doi:10.1117/12.593301

Cited by 9 publications

(1 citation statement)

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“…Liquid-crystal (LC) applications, including liquid-crystal displays (LCDs), optical waveplates, optical switches, LC lenses, and others, have been developed and become popular in recent decades. [1][2][3][4][5][6][7][8] Among them, LC lenses have received considerable attention owing to their favorable electrooptical property and the low operating voltage of LC materials. As a result, LC lenses based on Fresnel diffraction theory, [9][10][11][12][13][14][15] called LC Fresnel lenses, have been developed.…”

Section: Introductionmentioning

confidence: 99%

Polarization‐independent and electrically tunable liquid‐crystal Fresnel lenses based on photoalignment in dye‐doped liquid crystals

et al. 2010

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Abstract— This work demonstrates polarization‐independent and electrically tunable liquid‐crystal (LC) Fresnel lenses based on photoalignment in dye‐doped liquid crystals (DDLCs). The LC alignments in the adjacent odd and even zones of the LC Fresnel lens are orthogonally hybrid alignments. Those are generated by surface treatment of homeotropic and homogeneous alignment layers, and the dye‐adsorption layer onto the UV‐cured surface‐relief Fresnel zone plate. The maximum focusing efficiency (∼34.14%) of the fabricated LC Fresnel lens by applying a suitable AC voltage is close to the maximal theoretical focusing efficiency of a binary phase LC Fresnel lens (∼40.5%). Additionally, the focusing efficiency is polarization‐independent and electrically tunable.

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Section: Introductionmentioning

confidence: 99%

Polarization‐independent and electrically tunable liquid‐crystal Fresnel lenses based on photoalignment in dye‐doped liquid crystals

et al. 2010

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40.1: Invited Paper: Ultrafast High Optical Contrast Flexoelectric Displays for Video Frame Rates

Coles

Morris

Castles

et al. 2012

Symp Digest of Tech Papers

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We describe wide temperature range bimesogenic chiral nematic liquid crystals mixtures with high flexoelectro-optic coefficients (e/K), of the order of 2.0-4.0 CN -1 m -1 , with 50-100µs response times. Gray scale devices in both the ULH texture, with an optimum optical in plane switch of 45º at fields of <2Vμm -1 , and the USH mode, with a unique optically isotropic "field off" black state (~0.7 nits) and contrast ratios of ~5000:1, using "in plane" electric fields driving will be described. The new materials and devices give μs level to level switching and may be used in FSC video rate displays.

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Flexoelectro-optic Liquid Crystal Displays

Coles

Morris

2016

Handbook of Visual Display Technology

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Liquid crystal based continuous phase retarder: from optically neutral to a quarter waveplate in 200 microseconds

Cited by 9 publications

References 0 publications

Polarization‐independent and electrically tunable liquid‐crystal Fresnel lenses based on photoalignment in dye‐doped liquid crystals

Polarization‐independent and electrically tunable liquid‐crystal Fresnel lenses based on photoalignment in dye‐doped liquid crystals

40.1: Invited Paper: Ultrafast High Optical Contrast Flexoelectric Displays for Video Frame Rates

Flexoelectro-optic Liquid Crystal Displays

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