RussianPatents.com

Electrooptical modulator. RU patent 2267802.

Electrooptical modulator. RU patent 2267802.

FIELD: optical instrument engineering.

SUBSTANCE: modulator has non-monochromatic radiation source, polarizer, first crystal, first analyzer, and second crystal, second analyzer which units are connected together in series by optical coupling. Modulator also has control electric field generator connected with second crystal. Optical axes of first and second crystals are perpendicular to direction of radiation and are parallel to each other. Axes of transmission of polarizer and analyzers are parallel to each other and are disposed at angle of 45o to optical axes of crystals.

EFFECT: widened spectral range.

3 dwg

 


 

IPC classes for russian patent Electrooptical modulator. RU patent 2267802. (RU 2267802):

G02F1 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
Another patents in same IPC classes:
Non-linear optical environment Non-linear optical environment / 2267145
It may be used for protection of photo receiving devices from laser blinding by radiation of excessive intensity and at creation of non-linear optical limiters of radiation designed for protection of eyesight apparatus from damaging by laser radiation, for making low-threshold of optical switches. The purpose of the invention is in decreasing of energy threshold of the beginnings of non-linear -optical response of the environment. The non-linear -optical environment contains inorganic crystalline nanoparticles placed in transparent environment with linear optical characteristics. The nanoparticles consist of a nucleus not holding a shell having absorbing centers for example admixtures or defects. The shell and the nanoparticles are made of the same material. At impacting of laser radiation on non-linear-optical environment, photo generation of non-equilibrium electrons begins in the shell of the nanoparticle having defects out of an impurity zone into a conducting band. The changing of concentration of carriers lead to appearance of non-linear addition to the refraction index and absorbing of the shell. At photo generation of carriers a gradient of their concentration originates between the shell and the nucleus and as a result their diffusion begins deep into the nucleus. At that the thickness of the layer containing non-linear addition to the refraction index and absorption grows. As a result dielectric permittivity of a nanoparticle changes and that leads to changing of the section of its absorption and dispersion.
Electromagnet radiation magneto-optic modulator based onto effect of elastic induced magnetization in a reverse sense Electromagnet radiation magneto-optic modulator based onto effect of elastic induced magnetization in a reverse sense / 2266552
Device can be used for high-speed data processing transmitted by electromagnet radiation. Modulator has weak ferromagnetic material transparent plate disposed between coils having aiding connection; coils are connected and in pairs. Coils are connected with magnetic pulse oscillator. Ferromagnetic plate is tightly fixed between magnets for forming stable rectilinear domain boundary inside uniformly magnetized domain area of coils. Mechanical pressure aids are connected to plate for forming constant mechanical pressure which pressure together with influence of pulse magnetic field, created by coils, induces elastic induced magnetization in a reverse sense of weak ferromagnetic plate. Speed of operation can be increased till optical range frequencies. Power of control reaches of 1E, time of switch doesn't exceed a few tens of ns.
Liquid-crystalline display element Liquid-crystalline display element / 2264641
Element has liquid crystal layer, encased between two substrates with transparent electrodes, while at least one of electrodes is divided on stripes, widths of which are picked on basis of Fresnel lens forming law, and output mask with slits, combined with focuses of Fresnel lenses. Element additionally has input mask with slits, raster capacitor, second electrode is divided on stripes, widths of which are picked from same Fresnel lens forming law, focal distances of both Fresnel lenses are set equal, but for different wave lengths.
Method of conversing optical radiation frequency Method of conversing optical radiation frequency / 2263938
Transparent nano-particles having volume of 10-15 cm3 are illuminated by white light. Nano-particles are activated by impurity atom with concentration of 1020-1021cm-3 and are strengthened in form of monolayer onto transparent substrate. Nano-particles are made of glass and are glued to substrate by means of optically transparent glue. Substrate can be made flexible.
Switchable electrochromic devices with even switching and shadowing of preferable areas Switchable electrochromic devices with even switching and shadowing of preferable areas / 2262729
System includes multiple first means positioned at a distance from one another, being in contact with conductive covering and made with possible feeding of electric current to first conductive covering, and multiple second means positioned at a distance from one another, being in contact with second conductive covering and made with possible feeding of electric current to second conductive covering. Multiple first means distanced from one another and multiple second means distanced from one another are positioned along perimeter of window assembly. In addition, window assembly can include controller, made with possible control of feeding of electric current to selected means from multiple first means positioned at a distance from one another and to selected means from multiple second means positioned at a distance from one another, so that coefficient of light penetration through first portion of electrochromic environment is different from coefficient of light penetration through second portion of electrochromic environment.
Switchable electrochromic devices for use in transparent windows of aircraft Switchable electrochromic devices for use in transparent windows of aircraft / 2262728
Assembly of electrochromic aircraft window contains: a) assembly of outer window glass panes; and b) assembly of counter-veiling electrochromic glass panes, positioned at a distance from outer glass panes assembly and forming a chamber between them. Assembly of counter-veiling electrochromic glass panes has: first substrate, having first surface, containing first conductive covering, and second surface, containing second conductive covering; second substrate, positioned at a distance from first substrate, while second substrate has first covering, containing third conductive covering, while second surface of first substrate and first surface of second substrate are directed to one another and are at a distance from each other with forming of chamber between them; electrochromic environment in chamber and being in contact with second and third conductive elements, while electrochromic environment has light penetration coefficient, which alters if electric potential is applied to electrochromic environment; means for letting electric current through first conductive covering for heating first conductive covering to prevent veiling of window assembly; and means for letting electric current through second and third coverings to create an electric potential on electrochromic environment and to change light penetration coefficient for electrochromic environment.
Electromechanical modulator of difference of lengths of interference meter shoulders Electromechanical modulator of difference of lengths of interference meter shoulders / 2261464
Device has signal form generator, power amplifier and electromechanical block, including first fixed magnetic system and first coil of current-conductive wire, additionally included are integrator and corrector of amplitude-frequency characteristic of electromechanical block, and block also has second fixed magnetic system and second coil of current-conducting wire, rigidly and coaxially connected to first coil. Connection of first and second coils with fixed base is made in form of soft suspension with possible movement of first and second coils, forming a moving part of modulator, relatively to fixed magnetic systems, while output of said signal shape generator is connected to direct input of integrator, inverse input of which is connected to speed sensor of moving portion of modulator, output of integrator is connected to input of corrector, to output of which input of said power amplifier is connected.
Liquid crystal display / 2260921
Device has back wall, made of metallic alloy with flowing limit Re = 210-280 N/mm2 and durability limit Rm = 270-410 N/mm2.
Liquid crystal display / 2260921
Device has back wall, made of metallic alloy with flowing limit Re = 210-280 N/mm2 and durability limit Rm = 270-410 N/mm2.
Liquid crystal display / 2260921
Device has back wall, made of metallic alloy with flowing limit Re = 210-280 N/mm2 and durability limit Rm = 270-410 N/mm2.
Device for processing signals in acoustic-optic correlator with temporary integration Device for processing signals in acoustic-optic correlator with temporary integration / 2244334
Device has serially place, along one optical axis, optical coherent radiation source, collimator, ultrasound light modulator, first integrating lens, screen, second integrating lens and line of n photo-detectors, n subtraction blocks, n threshold blocks, adder with weight coefficient, support signal generator, delay line and voltage generator.
Magneto-optical switching element provided plane of polarization rotator based on faraday-effect Magneto-optical switching element provided plane of polarization rotator based on faraday-effect / 2244952
Magneto-optical element provided plane of polarization rotator based on Faraday-effect is made o f single single-axis crystal. Rotator has domains of both orientations in all its stable state without applied external magnetical field. Limits of domains for switching to any other stable state are disposed to move when external magnetic field is applied without forming additional domains.
Data transfer method for optical communication system (alternatives) Data transfer method for optical communication system (alternatives) / 2246177
Proposed method involves concurrent transfer of two optical data signals over optical communication line, their reception and comparison, and noise suppression. Optical data signals are shaped across output of nonlinear optical element by supplying at least one optical beam to element input and varying input power or phase, or frequency of one optical beam supplied to input of nonlinear optical element, or by varying electric or acoustic field applied to this element. In this way optical change-over between two unidirectional distributed and coupled waves propagating through nonlinear optical element is ensured. Each of these waves at output of nonlinear optical element corresponds to optical data signal. These data signals are supplied to differential amplifier designed for subtracting electric signals and/or to correlator which separates coinciding part of amplitude of these signals as function of time. As an alternative, optical data signals are shaped across output of tunnel-coupled optical waveguides of which at least one functions as nonlinear optical element.
Optical element, method for controlling spectral characteristic of the latter, optical elements system and method for controlling this system Optical element, method for controlling spectral characteristic of the latter, optical elements system and method for controlling this system / 2248022
Element has Bragg phase grid, which is formed in electric-optical material or in additional layer applied to it. Grid is provided with means for forming non-homogenous non-periodic outer electric field along direction of optical radiation movement, by means of which diffraction efficiency of grid is determined. Optical elements system has at least two Bragg phase grids, having different periods and placed serially along direction of movement of optical radiation. System of optical elements is controlled by effecting on grids with non-homogenous non-periodic outside electric field.
Light diode projector and method for presenting information on display Light diode projector and method for presenting information on display / 2248025
Device has reflector, means for producing image and optical system for projecting image on display, as light source a board with light diodes is used, light flows of which are concentrated on an optical system. Protector is provided with sensor of outer light level and connected to common current adjuster.
Electro-optic phase modulator / 2248601
Electro-optic phase modulator has electro-optic chip, transparent electrodes and protective case. Transparent current-conductive electrodes are applied directly onto chip. Electro-optic chip provided with applied electrodes is flexibly fixed between protection glasses and is placed inside protective case.
Magnetic device for exciting optic vortexes Magnetic device for exciting optic vortexes / 2249839
Magnetic device has variable magnetic field source which field is perpendicular to surface of magneto-optic material, and magnetic field source which field is oriented along gradient of magnetization of material. Magnetic field source which field is perpendicular to surface of magneto-optic material is made in form of transparent current-leading structures. One of conductors of the structure crosses center of light beam and the other one - along aperture of light beam in perpendicular to gradient of magnetization. Device permits to take control over location of optic vortexes within diffracted radiation and changes amount of information transmitted by light beam.
Multichannel optical commutator for optical communication lines Multichannel optical commutator for optical communication lines / 2251131
Multichannel optical commutator is made of two bunches of optical fibers, two collimators which have their focuses to place bunches' edges of, and light-guiding element mounted between collimators. As light-guiding element either mirrors or two acoustic-optical deflectors are used or their combination. Device allows to connect N users in series, which N user are connected to first bunch to S users which are connected to second bunch and visa versa and to conduct communication between users connected to one bunch.
Bistable liquid-crystal units Bistable liquid-crystal units / 2253888
At least two stable or metastable ordering of liquid crystal are realized. Switching aid which causes the switching of liquid crystal material between switches has aid intended for optical illumination of the device. Device can provide the supply of linear polarized light for inducing torsion in liquid crystal. Alternatively ordering of liquid crystal can be switched by means of aid for supplying second energy, for example, electric field. In this case light serves to generate heat which helps to switching. One or both energy sources can be used locally for switching chosen areas or pixels. Energy levels on bistable substrate can be controlled by using oligomer adding (slippery surface).
Bistable liquid-crystal units Bistable liquid-crystal units / 2253888
At least two stable or metastable ordering of liquid crystal are realized. Switching aid which causes the switching of liquid crystal material between switches has aid intended for optical illumination of the device. Device can provide the supply of linear polarized light for inducing torsion in liquid crystal. Alternatively ordering of liquid crystal can be switched by means of aid for supplying second energy, for example, electric field. In this case light serves to generate heat which helps to switching. One or both energy sources can be used locally for switching chosen areas or pixels. Energy levels on bistable substrate can be controlled by using oligomer adding (slippery surface).
© 2013-2014 Russian business network RussianPatents.com - Special Russian commercial information project for world wide. Foreign filing in English.