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Ferroelectric liquid crystal display cell Ferroelectric liquid crystal display cell has two flat transparent plates arranged in parallel one above the other, on one side of which there are polaroids and on the other - transparent current-conducting coatings which are connected to an alternating-sign voltage source, on the surface of which a direction is selected for providing uniform orientation of liquid crystal molecules, a ferroelectric liquid crystal situated in the space between the transparent current-conducting coatings of the plates and which varies its optical anisotropy under the effect of an electric field. The crystal is non-helicoidal, and the values of rotational viscosity, spontaneous polarisation and modulus of elasticity, which determines deformation along smectic layers, are in a ratio to each other which provides periodic spatial deformations along the smectic layers and a characteristic relationship between birefringence of the display cell and alternating frequency of the electric field. |
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Polarising film is a film of iodised polyvinyl alcohol with a mixture of carbon nanotubes and carbon nanofibres deposited on two sides by laser deposition using p-polarised radiation of a CO2 laser at wavelength 10.6 mcm, as well as orientation the deposited nanostructures in an electric field with strength of 50-200 V/m. |
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Liquid crystal space-time light modulator is proposed, representing a multilayer electro-optical structure comprising a film of a nematic liquid crystal (NLC) sensitised with a photosensitive complex with a charge transfer on the basis of the system: polyimide-quantum points of the row CdSe(ZnS), CdS/ZnS, InP/ZnS. To align LC molecules, an aligning coating is used on the basis of non-photosensitive polyimide films. When this device is functioning, it is proposed to use a permanent or a pulse lighting and a pulse supply voltage. |
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Proposed cell comprises two flat translucent plates arranged in parallel one above the other. Polaroids are applied on one side of said plates and translucent current conducting coats connected to alternating voltage source are applied on their opposite side. Cell comprises also ferroelectric liquid crystal (FLC) arranged between said coats of plates to vary its optical anisotropy at electric field effects. FLC layer thickness - d, helicoid pitch- p0 and boundary conditions defined by factor Wq are selected subject to the following conditions: Kφq0 2 ~Wq/d, where Kφ is modulus defining FLC deformation along azimuthal angle φ; q0 is deformation wave vector; Wq is square factor of power of FLC-to-adjoining surface adhesion. |
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Multistable electrooptic element with polarisers Element has two parallel transparent plates with transparent electrodes on inner sides between which there is a film of a capsular polymer of cholesteric liquid crystal, and the cholesteric liquid crystal used is a mixture of an ionic surfactant and a cholesteric liquid crystal with arbitrary value of dielectric anisotropy. On the outer sides of the transparent plates there are crossed polarisers. |
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Polarising iodic-polyvinyl film for laser, television, display and medical equipment, for construction of spatial time light modulators, display pixels, limit stops, laser radiation switches, eye protection means for welders, pilots of aircrafts. It contains iodinated polyvinyl alcohol, with low content of acetate groups, as polarisation base; at that, both film surfaces are nanostructured with single-wall carbon nanotubes by their laser application to film surfaces by means of CO2 laser and orientation in electric field with intensity of 50-200 V/m. |
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Proposed device is a multilayered electro-optical structure, consisting of a film of a nematic liquid crystal, sensitised by a light-sensitive charge-transfer complex which is based on a system consisting of light-sensitive pyridine structure and fullerene. For orientation of the molecules of the liquid crystal, an orienting coating based on carbon nanotubes is used. |
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Liquid crystal spatial light modulator (versions) Present invention pertains to measurement techniques. The liquid crystalline substance used in the modulator, which fills the space between current conducting coatings, is a smectic C*-type composition with ferroelectric properties, capable of forming in its layer, spatially inhomogeneous structures, with high speed modulating phase of the transmitted light, under the effect of pulsed alternating electrical voltage. The light is modulated using one spatially inhomogeneous modulating element, whose surface area is equal to the aperture of the whole modulator, with solid current conducting coatings on the whole aperture. The pulsed control alternating electrical voltage is applied to the single pair of current conducting coatings. In the second version, one of the current conducting coatings is reflective. |
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Device has to multiplayer electro-optic structure, which is formed by film of nematic liquid crystal (NLC) sensitized by photosensitive complex with charge transfer on base of system, which has to be photosensitive pyridine fullerene-structure. To orient molecules of LC the orienting coating is used made on base of film of non-photosensitive polyimide. |
Another patent 2550942.