De Bougrenet De La Tocnaye
Jean-Louis De Bougrenet De La Tocnaye, Guilers FR
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20100039588 | METHOD FOR MANUFACTURING A PSFLC-BASED AND/OR PSAFLC-BASED ELECTROOPTIC CELL AND CORRESPONDING ELECTROOPTIC CELL, DEVICE AND HELMET - A method is provided for manufacturing an electrooptic cell, which includes two plates of optically transparent material and at least one thickness of a composite gel based on a smectic liquid crystal and on a polymer provided between the plates, wherein the gel is in a smectic phase at ambient temperature. The method includes injecting a mixture of a ferroelectric and/or anti-ferroelectric smectic liquid and a monomer between the plates, wherein the monomer content of the mixture is between 5 and 25% by weight. The mixture is heated to above its smectic phase/nematic phase transmission temperature so that the mixture is in the nematic phase. The mixture is irradiated, by ultraviolet radiation, so as to polymerize the monomer and thus obtain the gel. During the irradiation step, an electric or magnetic field is applied to the mixture. | 02-18-2010 |
20110018984 | SPECTACLES FOR THREE-DIMENSIONAL VIEWING OF DIGITAL VIDEO CONTENT FROM A PROJECTOR - Liquid crystal spectacles are provided for three-dimensional viewing of digital video content from a projector. The viewing spectacles include a first rectilinear polariser and a second rectilinear polariser respectively having polarisation axes P | 01-27-2011 |
20120327351 | OPTICAL VARIATION DEVICE, OPTICAL ASSEMBLY AND METHOD FOR MANUFACTURING SUCH A DEVICE - An optical variation device includes a liquid-crystal element having optical properties that control the propagation of light and two substrate plates arranged on either side of the liquid-crystal element. The two substrate plates are covered respectively with first and second control electrodes. Each electrode has a substantially central-opening referred to as the optical aperture. The device also has a layer of a material arranged between the electrodes and filling the optical aperture. The material has a surface resistivity of 10 kΩ/square to 10 GΩ/square and at least the first electrode is divided into a plurality of portions forming sub-electrodes suitable for simultaneously receiving different potentials. | 12-27-2012 |
Jean-Louis De Bougrenet De La Tocnaye, Plouvien FR
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20090122300 | OPTICAL REFRACTOMETER FOR MEASURING SEAWATER SALINITY AND CORRESPONDING SALINITY SENSOR - An optical refractometer is provided for measuring the refractive index of a liquid. Such a refractometer includes a first optical block having a transparent material whereto is secured a light source, a second optical block having a transparent material whereto is secured a position sensor. The optical blocks are arranged on either side of a conduit wherein the liquid flows. | 05-14-2009 |
Jean-Louis De Bougrenet De La Tocnaye, Guilers Kerhuo FR
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20120038840 | OPTICAL SHUTTERING DEVICE BASED ON LIQUID CRYSTALS WITH ATTENUATION OF SWITCHING NOISES OF SAID LIQUID CRYSTALS, CORRESPONDING VIEWING GOGGLES AND DISPLAY DEVICE - An optical shuttering device is provided, which includes an optical cell with a liquid crystal material between first and second transparent substrates and controlled by an electronic switching circuit. The switching circuit includes a power supply module, providing a control voltage, and a switching element mounted in series between the power supply module and the cell, making it possible to switch the cell between an on state and an off state. The electronic switching circuit furthermore includes a current source mounted in series between the power supply module and the switching element. The substrates preferably have different thickness and material. | 02-16-2012 |