133results about How to "High degree of polarization" patented technology

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 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.

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.

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.

A fully-glazed frit and a preparing method thereof are disclosed. Raw materials for preparing the frit comprise quartz, non-calcined alumina, aedelforsite, potassium feldspar, white mica, sodium carbonate and fine powder. The frit is prepared by steps of mixing, melting, water quenching, drying, smashing, and the like. Combination of the frit and raw materials improves hardness and wear resistance of glaze materials and transparency of glaze layers. The initial melting points of the glaze materials are increased, thus reducing or avoiding generation of gas pores.

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.

The invention provides a preparation method of a coating type dye polarization component, wherein the coating type dye polarization component comprises a substrate; a polarization alignment film is arranged on the substrate; the preparation method comprises the following steps: heating a reaction vessel to a reaction temperature according to a hot bath method, maintaining the reaction temperature in the reaction vessel; placing a reaction monomer in the reaction vessel, stirring and fully dissolving, then standing for a first time interval; placing a dye in the reaction vessel, stirring and fully dissolving, then standing for the first time interval to obtain a polarization film solution; coating the polarization film solution on the polarization alignment film of the substrate by using a spin-coating method to obtain a polarization film; curing the polarization film through ultraviolet irradiation to obtain the coating type dye polarization component. The invention further provides a liquid crystal panel. The solution of the invention can improve a polarization degree of a polarizer and improve a contrast ratio of the liquid crystal panel.