Dependence of the anisotropic absorption coefficient on the thickness of molecularly oriented organic dye films

Bobrov, Yu. A.

doi:10.1364/jot.66.000547

Cited by 5 publications

(2 citation statements)

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“…The difference between ordinary and extraordinary directions in refraction coefficients can be up to 0.8 in the visible spectrum region. 13,14 TCF polarizers are extraordinarytype polarizers, creating less off-axis light leakage. This determines their enhanced viewing-angle characteristics in comparison to traditional polarizers.…”

Section: Introductionmentioning

confidence: 99%

Environmental and optical testing of Thin Crystal Film™ polarizers

Bobrov¹,

Blinov²,

Ignatov³

et al. 2003

J Soc Info Display

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Abstract— We have developed an advanced polarizing nanomaterial that provides new technical and economical advantages over traditional iodine film polarizers for LCD designers and manufacturers. Thin Crystal Film (TCF)™ polarizer material is based on modified organic dichroic dyes and can be simply coated as a thin molecular oriented film (less than 1 μm) directly onto a plastic or glass substrate. This crystalline material exhibits enhanced viewing‐angle characteristics, high thermal stability, and lightfastness. Replacement of conventional polarizers by the new TCF polarizer allows decreasing thickness of LCD designs by 20–75%, improving LCD durability and reliability, all while significantly reducing cost. This paper presents TCF polarizer products for LCD applications. We report the results of TCF optical and environmental testing. Ultraviolet‐light photostability of TCF is also studied.

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Section: Introductionmentioning

confidence: 99%

Environmental and optical testing of Thin Crystal Film™ polarizers

Bobrov¹,

Blinov²,

Ignatov³

et al. 2003

J Soc Info Display

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“…This technique allows producing oriented Thin Crystalline Films exhibiting high anisotropy of refraction and absorption indices [6,7]. The growth of anisotropic crystal nano-films on non-crystalline substrates is unique and powerful tool for material engineering of optical devices.…”

Section: Introductionmentioning

confidence: 99%

Thin crystal film polarizers and retarders

Ignatov¹,

Lazarev²,

Назаров³

et al. 2002

SPIE Proceedings

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We developed a new technology for thin crystal film (TCF) manufacturing based on water-soluble salts of aromatic polycyclic compounds. TCF is produced by coating and subsequent drying of an aqueous solution on plastic or glass surface into molecularly oriented 100-1000 nm thick crystal nano-film. First industrial application of nano-films is TCF polarizer for liquid crystal displays (LCD). TCF polarizers are made from modified organic dyes with relatively narrow spectral absorption band. Mixing various dyes allows covering broad spectral region. Blending provides variety of combinations of background and character colors that are necessary for applications. TCF made from dichroic dyes are highly anisotropic, biaxial extraordinary polarizers. Birefringence of TCF made from some materials reaches 1.0. Several highly birefringent TCFs show specific retardation characteristics. For example, 300 nm thick TCF based on dichroic dye with narrow absorption band at 450 nm and transparent in the long-wave region, has maximum birefringence of 0.85 in the wavelength region of 500-800 nm. TCF are available for industrial application in LCD as external, internal polarizers and retarders.

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