137results about How to "High degree of polarization" patented technology

The invention discloses an optical polarized light element and method for manufacturing the same, wherein the method comprises, providing a silicon base having a smooth surface, depositing iron catalyst onto the silicon base surface, feeding the silicon base into a reaction furnace, heating the reaction furnace and feeding in the mixture gas of acetylene and argon, controlling the flow capacity of the mixture gas, controlling the mixture ratio of acetylene and argon gas, gripping and pulling a bundle of carbon nanometer tubes using a clamp, arranging the carbon nanometer tubes rope compactly and parallelly onto a transparent base sheet.

The object of the present invention is to provide an optical functional film containing a film having a structure of fine holes which contains ellipsoid or slit-like holes; and a composite film containing a film having a structure of fine ellipsoidal or slit-like holes and a metal layer on a surface of the film including inside portions of the holes; a method for producing an optical functional film which includes forming a film, and stretching the obtained film to form ellipsoidal or slit-like holes in the film, the forming the film comprises applying a coating solution containing an organic solvent and a high-polymer compound over a surface of a substrate, forming droplets in the obtained film, and vaporizing the organic solvent and the droplets to thereby produce a film having holes in the film; and a method for producing the composite film.

The invention consists of pumping source, cavity, and a group of coupling device set between the pumping source and cavity, and connected with pumping source through optical fiber. The cavity consists of front cavity mirror and back cavity mirror coated with film. The double-doped crystals and active Q-switch are set between the front and back mirrors. A cooling device is set on the double-doped crystals. The invention features using active Q-switch to control the passive Q-switch for getting prelase pulse, and using saturable absorption crystals as longitudinal mode selector for making the solid single longitudinal mode laser work under higher pumping power.

This invention provides a sheet polarizer,including polyvinyl alcohols polarizing film, sticking agent layer separated from polyvinyl alcohols polarizing film through at least on face and overlapped with protect film. Said sticking agent layer is comprised of sticking agent components containing followed water solution. Said water solution contains acetyl modified PVA resin and glyoxylate indicated by formula (I) and has a pH valve ranged in 4-10. where, the content of acetyl modified PVA resin is 1-8%( percentage by weight) compared to the 100% water(percentage by weight), the weight ratio of acetyl modified PVA resin with the solid glyoxylate is in the range of 1:0.03-0.25. in formula (I) , M represents alkali metals or alkaline-earth metals, n represents valence mumber correspond to M, indicating 1 or 2. According to said sheet polarizer, sticking property together with warm water resistance between the polarizing film and the protect film are improved.

The invention discloses a T-shaped polarization beam splitter with a photonic crystal waveguide. The T-shaped polarization beam splitter comprises the photonic crystal waveguide with a complete forbidden band. After incident waves in any polarization directions are input to the polarization beam splitter by the input end of the photonic crystal waveguide, a transverse electric (TE) component is output from a TE output end, whereas a transverse magnetic (TM) component is output from the TM output end of the beam splitter. The T-shaped polarization beam splitter disclosed by the invention is small in structural size, high in degree of polarization, high in optical transmission efficiency, convenient in integration and high in efficiency and is suitable for integrating optical paths on a large scale, and the function of different-wavelength polarization beam splitting can be realized.

The invention provides a device and detecting method for restraining polarization crosstalk measuring noise by the adoption of a light source. The device is composed of a broadband light source, a polarization device to be detected, an optical path correlator, a difference detecting device, an optical signal converting device and a signal recording device. The device is characterized in that the broadband light source is a low coherent light source with high degree of polarization, and a polarization device provided with high extinction ratio is arranged behind the light source. The detecting method comprises the steps that a polarization state controller is connected between the light source and the polarization device, and the polarizing angle of line polarization light and the polarization device are overlapped with each other seriously through adjusting the polarization state of the output light of the light source. According to the device, the high degree of polarization light source and the high extinction ratio polarization device are combined, the measuring noise in the optical coherent domain polarization can be restrained through increasing the extinction ratio of signal light injected into the device to be detected, and measuring accuracy to the device polarization feature of the device is improved. The device and detecting method for restraining polarization crosstalk measuring noise by the adoption of the light source are simple in structure, excellent in performance and easy to adjust, and can be widely applied to the field of high accuracy measuring and analyzing to optical performances of optical type polarization-maintaining devices and the like.

A method for manufacturing a polarizer of the invention, wherein the polarizer comprises a film that comprises: a matrix made of an optically-transparent resin containing a dichroic absorbing material; and minute domains that are made of an energy ray-curable birefringent material having liquid crystalline properties and are aligned and dispersed in the matrix; and comprising a process of applying energy rays for fixing the alignment of the birefringent material having liquid crystalline properties. A polarizer obtained by the method has a high transmittance and a high polarization degree, and being able to control unevenness of the transmittance in the case of black viewing.

The invention provides a semi-polar planar GaN-based light emitting diode and its preparation method. The light emitting diode comprises a substrate, an aluminium nitride buffer layer, an undoped semi-polar planar GaN layer, a semi-polar planar GaN N-type layer, a semi-polar planar N-type InGaN insert layer, a semi-polar planar GaN / InGaN multiple quantum well active luminescent layer, a semi-polar planar P-type AlGaN electronic barrier layer, and a semi-polar planar P-type GaN layer. The surface of the substrate has raised graphs which are periodically arranged; the aluminium nitride buffer layer is deposited in interval areas among the raised graphs; the undoped semi-polar planar GaN layer is manufactured on the aluminium nitride buffer layer; there are gas areas between the undoped semi-polar planar GaN layer and the raised graphs on the surface of the substrate, thus blocking dislocation defects from extending upwards; the semi-polar planar GaN N-type layer is manufactured on the undoped semi-polar planar GaN layer; the semi-polar planar N-type InGaN insert layer is manufactured on the semi-polar planar GaN N-type layer; the semi-polar planar GaN / InGaN multiple quantum well active luminescent layer is manufactured on the semi-polar planar N-type InGaN insert layer; the semi-polar planar P-type AlGaN electronic barrier layer is manufactured on the semi-polar planar GaN / InGaN multiple quantum well active luminescent layer; and the semi-polar planar P-type GaN layer is manufactured on the semi-polar planar P-type AlGaN electronic barrier layer.

A optical composite has high impact resistance and high degree of polarization, and is used as, for example, goggles, sunglasses, and spectacles, which have high impact resistance, has more safety, and can prevent dazzling light. The polarizing optical composite equipped with a polarizing plate holding a polarizer sheet layer between two protective sheet layers, wherein the polarizing sheet layer has on one side thereof at least two layers, in a body, constructed of materials different each other.

A method for producing a polarizer comprises the steps of: (A) forming a polyvinyl alcohol-based resin layer on a support made of an optically transparent thermoplastic resin; (B) stretching a polyvinyl alcohol-based resin layer together with the support to obtain a stretched layer; (C) immersing the stretched layer in a dyeing liquid containing iodine to obtain a dyed layer in which absorbance thereof determined from a tristimulus value Y is from 0.4 to 1.0 (transmittance T=40% to 10%); and (D) removing a part of iodine adsorbed in the dyed layer so that the absorbance of the dyed layer decreases by 0.03 to 0.7, provided that the absorbance of the dyed layer is controlled so that it does not become less than 0.3. The support may be used as an optical film laminated to the polarizer.

A solid-state laser system includes a solid state oscillator for generating a laser beam and a multiple stage amplifier for increasing an energy of the beam. The oscillator includes an elongated housing having an elongated cavity defined therein, a solid state rod disposed within the cavity, a pumping source for exciting laser active species within the rod, and a resonator including the rod disposed therein for generating a laser beam. The multiple-stage amplifier preferably includes an even number of stages. One or more pairs of compensating stages may be mutually rotated about the beam axis by substantially 90°, with each pumping direction parallel to the polarization direction of the beam. A first stage may be side-pumped by a pumping radiation source in a direction substantially parallel to a polarization direction of the beam generated by the oscillator resonator. A divergence adjusting optic may be disposed before at least one stage of the amplifier for adjusting a divergence of the beam prior to entering the amplifier stage. A divergence adjusting optic may be disposed after the amplifier stage having the divergence adjusting optic before it and before a second amplifier stage, and may be adjustable as to its divergence adjustment.

A polarizing sheet (A) includes a polarizing film ( 2 ) and cellulose triacetate films ( 6, 6 ') bonded to opposing surfaces of the polarizing film ( 2 ) with adhesive layers ( 4, 4 ') interposed, respectively. A thermoplastic film ( 10 ) is stacked on the exposed surface of one ( 6 ') of the cellulose triacetate films. Another cellulose triacetate film ( 14 ) free of an ultraviolet absorber is bonded to the exposed surface of the other cellulose triacetate film ( 6 ) of the polarizing sheet with an adhesive ( 12 ) containing an organic photochromic compound, to thereby form a laminate sheet. The laminate sheet is placed in an injection mold, and a molding resin material fusible with the thermoplastic film ( 10 ) is injected over the thermoplastic film.

The present invention provides a trisazo dye, a composition for anisotropic dye film comprising the dye, an anisotropic dye fime and a polarizating element comprising the anisotropic dye film. The said dye for forming by a wet process an anisotropic dye film which is black and has a high degree of polarization and a high degree of molecular orientation. The dye, which is for forming an anisotropic dye film by a wet process, is a trisazo dye which in its free acid form is represented by the following general formula (1). In the formula, A<1> is an optionally substituted phenyl or aromatic heterocyclic group; B<1> is an optionally substituted aromatic hydrocarbon group; D<1> is an optionally substituted aromatic hydrocarbon or aromatic heterocyclic group; R1 is hydrogen, hydroxy, or optionally substituted amino; and m and n each is 0 or 1.

The present invention relates to a high ultraviolet transmitting double wire grid polarizer for fabricating a photo-alignment layer and a fabrication method thereof for improving the fabrication efficiency of the photo-alignment layer. More specifically, the invention provides a high ultraviolet transmitting double wire grid polarizer comprising: a substrate; a reflection preventing layer which is formed on the substrate; a patterned photosensitive material layer which is formed on the reflection preventing layer; and double metal thin film layers which are respectively formed on the photosensitive material layer and the reflection preventing layer. Further, the invention provides a fabrication method of a high ultraviolet transmitting double wire grid polarizer, the method comprises the steps of: forming a reflection preventing layer on a substrate; forming a photo sensitive material layer by applying photoresist to the top of the reflection preventing layer; forming a wire grid pattern by developing the photosensitive material layer after selectively exposing the photosensitive material layer according to a pattern that is formed by the laser interference light; and depositing metal on the wire grid pattern. Thus, the invention smoothly forms a wire grid by using the reflection preventing layer when the double wire grid polarizer is fabricated, and cuts down the production cost with no need to perform a dry etching process since the metal is deposited after the wire grid of the photosensitive material layer is formed. Further, compared with the existing single wire grid polarizer, the invention improves transmittance and polarization of the ultraviolet region, thereby enhancing the efficiency of the fabrication process of the photo-alignment layer.

A straight waveguide phase modulator comprises a titanium-diffused lithium niobate phase modulator. The straight waveguide phase modulator is characterized in that the end face of the input end of the titanium-diffused lithium niobate phase modulator is adhered with the end face of a lithium niobate polarizer chip in a coupling manner; the lithium niobate polarizer chip comprises a lithium niobate wafer and a polarizing waveguide formed on the surface of the lithium niobate wafer; a first waveguide surface is formed on the surface of a structure of the polarizing waveguide, and a 45-degree included angle is formed between the polarizing angle of the polarizing waveguide to input light and the first waveguide surface; a second waveguide surface is formed on the surface of a structure of a phase modulation waveguide; and the first waveguide surface is flush with the second waveguide surface. The straight waveguide phase modulator has the advantages that a polarizing device and a phase modulation device are integrated, so that the size of the straight waveguide phase modulator is greatly reduced, complexity of coupling technique is reduced, and production and processing efficiency is improved. Since polarization maintaining optical fiber connection between the polarizing device and the phase modulation device is omitted, degree of polarization is greatly increased (larger than 80 decibels), and meanwhile, system reliability is improved.

The invention discloses a color adhesion agent and its manufacturing process and a polaroid with the application of the color adhesion agent. The color adhesion agent comprises the following components: by weight, 1-5% of an adhesion agent raw material, 93-98.75% of pure water, 0.25-1.5% of a dye, and 0.5% of a color fixing agent. The adhesion agent which can be used to adjust a plurality of colors can be used to bond a cellulose triacetate (TAC layer) and a PVA layer, and after drying and curing, the color polaroid with high degree of polarization and high transmitance is immediately obtained. The polarization degree of the iodine Polaroid reaches more than 99%, transmitance reaches more than 40%, and polaroids of different colors can be obtained. Thus, usage requirements are met.

Comparing with prior art, the disclosed wide band polarizer possesses advantages of higher luminous flux, degree of polarization, wider band, simple technique of preparation and easy of adjustment. The invention discloses designing thoughts for polarizer and concrete preparation method as well as optical property of the polarizer calculated under the designing thoughts. The invention is applicable to many polarization measurement areas such as soft X ray magnetic circular or linear dichromatic analysis and soft X ray resonance magnetic scattering.

The invention discloses a high-extinction-ratio TE optical switch based on panel photonic crystals. The high-extinction-ratio TE optical switch comprises an integral with the upper panel photonic crystal and the lower panel photonic crystal connected. The upper panel photonic crystal is a first panel square lattice photonic crystal with a complete forbidden band. A cell of the first panel square lattice photonic crystal is composed of a high-refraction-index rotating square rod, three first panel medium rods and a background medium. Each first panel medium rod is composed of a high-refraction-index medium sleeve and a low-refraction-index medium in the sleeve or is composed of one to three high-refraction-index panel thin films or is composed of a low-refraction-index medium. The lower panel photonic crystal is a second square lattice photonic crystal with a complete forbidden band. A cell of the second square lattice photonic crystal is composed of a high-refraction-index rotating square rod, three high-refraction-index second panel medium rods and a background medium which is a low-refraction-index medium. The frequency of the TE optical switch ranges from 0.4057 to 0.406. The high-extinction-ratio TE optical switch is obtained.

The invention provides a polaroid, a display substrate, a liquid crystal display panel and a making method thereof and belongs to the technical field of display. The problems of poorer orientation effect, lower light transmittance and lower polarization degree of an existing polaroid can be solved. The making method of the polaroid comprises the steps of orientation layer forming and polarization layer forming. The polarization layer forming step comprises the sub-steps that a polarization layer is coated with a mixture, wherein the mixture includes a material capable of performing orientation under the effect of a magnetic field force; orientation is conducted on the mixture through a uniform magnetic field; the mixture is cured to form a polarization layer. The polaroid made by means of the making method has consistent orientation, the light transmittance and lower polarization degree are improved, and the polaroid has better display effect.

The invention discloses a line width narrowing module of a laser resonant cavity. The module is an integrated optical element, wherein two side surfaces of a prism-like body respectively form an incident surface and a reflecting surface; the reflecting surface is a reflective blazed grating. The module can be used for solving the problem of difficult light emission caused by a complex optical system and surface abrasion of an optical element in a low-gain laser and is high in optical integrity and simple to regulate and use. The module is good in wavelength selection characteristic and relatively good in damage resistance threshold value. The laser resonant cavity built by using the module has few optical elements, is high in interference resistance and can be applied to places which are complex in environment.

The adhesive composition for optical films containing a (meth)acrylic polymer of 300,000-1,200,000 weight average molecular weight on gel permeation chromatography obtained by copolymerizing as monomer units 30-98.9 weight% of alkyl (meth)acrylate, 1-50 weight% of polymerizable aromatic ring-containing monomer, 0.1-20 weight% of hydroxyl group-containing monomer, and 0-4 weight% of carboxyl group-containing monomer, is characterized in that the (meth)acrylic polymer does not contain carboxyl group-containing monomers as monomer units, the content of solids is 20 weight% or more, and the solvent content is 80 weight% or less.

The present invention provides a polymerizable liquid crystal composition that demonstrates favorable polarized light emission for a polarized light element, the composition using a polymerizable liquid crystal compound and colorant; also provided are a coating material, a medium, and a polarized light-element. Furthermore the present invention provides a favorable novel naphtholactam derivative, novel coumarin derivative, novel Nile red derivative, and novel anthracene derivative as the colorant. Specifically, provided is a polymerizable liquid crystal composition containing (A) at least one type of liquid crystal compound having a polymerizable functional group, (B) at least one type of colorant, and (C) a polymerization initiator; further provided are a novel naphthyl and derivative expressed by general formula (IV'), a novel coumarin derivative expressed by general formula (VI'), a novel Nile red derivative expressed by general formula (VII'), or a novel anthracene derivative expressed by general formula (VIII'), which are favorable as the colorant of component (B).

Provided is a wire grid type polarizer having a high polarization degree, a high p-polarized light transmission efficiency, and a low backside surface s-polarized light reflection coefficient, and also provided is a method for manufacturing the wire grid type polarizer. The wire grid type polarizer (10) has: a light-transmissive substrate (14), on the surface of which a plurality of protruded rims (12) are formed in parallel with each other at a predetermined pitch with flat portions (13) formed in between, the protruded rims (12) having a width gradually decreasing from the bottom to the top; and a first metal layer (20) formed of a metal coated on side surfaces of the protruded rims (12), wherein the maximum value of the coated thickness extending from the position corresponding to half the height of the protruded rims (12) to the bottom is smaller than the maximum value of the coated thickness extending from the position corresponding to half the height of the protruded rims (12) to the top portion (19). In the manufacturing method, the first metal layer (20) is formed in such a way that the metal is deposited on the side of a first side surface (16) from a direction forming an angle satisfying the equation tan([theta]<R>1+-10)=(Pp-Dpb / 2) / Hp and then the metal is deposited from a direction forming an angle satisfying the condition [theta]<R>1+5<=[theta]<R>2<=[theta]<R>1+25..

The invention relates to an optical system for stereographic projection. The optical system for the stereographic projection comprises an object image, and a projection objective lens or a projection objective lens. The optical system further comprises a color splitting prism. Light beams which are emergent from the projection objective lens or the projection objective lens pass through the color splitting prism to be split into a green light path, a red light path and a blue light path. The light beams in the green light path are polarized by a green light polarization beam splitter, and finally two sub light paths in the same polarization state are output. The light beams in the red light path are polarized by a red light polarization beam splitter, and finally two sub light paths in the same polarization state are output. The light beams in the blue light path are polarized by a blue light polarization beam splitter, and finally two light paths in the same polarization state are output. The six sub light paths are polarized and modulated into left circular polarized light and right circular polarized light by a liquid crystal variable phase retarder in the synchronous time sharing process. According to the optical system, more than 97% of energy of natural light can be polarized into linear polarized light after color separation, and therefore the picture brightness and the stereographic display fidelity can be greatly improved.

The invention discloses a photonic crystal waveguide TM-polarization separator comprising a photonic crystal waveguide with a complete forbidden band. The incident waves in any polarization direction of the input end of the photonic crystal waveguide are incident into the polarization separator, TM waves are output from the output end of the polarization separator, and TE waves return by reflection from the input end of the polarization separator. According to the photonic crystal waveguide TM-polarization separator, the structure size is small, the degree of polarization is high, the light transmission efficiency is high, the integration is convenient and the efficiency is high, and the photonic crystal waveguide TM-polarization separator is suitable for large-scale optical path integration and can realize the functions of the polarization beam splitting of different wavelengths.

Disclosed is an optical film having excellent optical characteristics such as low haze value, excellent transparency, high visible light transmittance and low birefringence, which is further excellent in water vapor permeability and ultraviolet absorption. Also disclosed are a polarizing plate using such an optical film, and an image display device using such a polarizing plate. Specifically disclosed is an optical film for polarizer protective films, which is composed of a polypropylene resin mixture mainly containing a polypropylene resin synthesized by a metallocene catalyst and also containing a benzotriazole compound. The benzotriazole compound is contained in an amount of 0.08-5.5% by mass relative to the polypropylene resin mixture. Also specifically disclosed is a polarizing plate obtained by forming such an optical film on at least one side of a polarizer. Further specifically disclosed is an image display device using such a polarizing plate.

A uniaxially stretched multi-layer laminate film that exhibits a high polarization performance of 99.5% or more in a simpler configuration than before, a polarizing plate that is composed of the same, an optical member for a liquid crystal display device, and a liquid crystal display device are provided. Namely, in the uniaxially stretched multi-layer laminate film in which a first layer and a second layer are alternately laminated, the uniaxially stretched multi-layer laminate film includes an intermediate layer that has a thickness of 2 μm or more and 30 μm or less; the first layer is composed of a polyester containing a naphthalene dicarboxylic acid ester; the second layer is composed of a copolymer polyester and is an optically isotropic layer that has an average refractive index of 1.50 or more and 1.60 or less; the first layer, the second layer, both first and second layers, or the intermediate layer contains a visible light absorbent, which has a weight loss of less than 10% when it is kept at 300° C. for 1 hour, in an amount of 200 ppm or more and 2500 ppm or less on the basis of the weight of the layer; the uniaxially stretched multi-layer laminate film has a polarization degree of 99.5 or more; and the average transmittance Ts for S-polarized light in a wavelength range of 400 nm to 800 nm is 60% or more.

The invention discloses a visible light communication light source based on a nonpolar and semipolar surface and a corresponding patterned sapphire substrate. A sapphire substrate is selected to be processed into grating-shaped strip-shaped patterns; the angle of the side wall of a step is optimized in the etching process, and the angle of a growth surface of the next step is optimized; a barrierlayer is designed on the patterned sapphire substrate, and a silicon oxide film is adopted as an epitaxial barrier layer; a GaN layer, an N-type GaN layer, an InGaN / GaN multi-quantum well layer, an electronic barrier layer and a p-type GaN layer are sequentially grown by adopting a chemical vapor phase epitaxy method, and the growth method of the GaN layer, the N-type GaN layer, the InGaN / GaN multi-quantum well layer, the electronic barrier layer and the p-type GaN layer is disclosed. The influence of quantum-limited Stokes effect is weakened by utilizing the advantages of non-polar / semipolarsurface on III-group nitride polarization regulation, the overlapping of electron-hole wave functions on real space is increased, and the radiation recombination proportion and the rate of current carriers are improved, and therefore, the method provided by the invention is suitable for effectively improvement of the visible light communication performances by adopting the nonpolar and semipolar surface technologies.