212results about How to "Improve polarization" patented technology

A III-nitride optoelectronic device comprising a light emitting diode (LED) or laser diode with a peak emission wavelength longer than 500 nm. The III-nitride device has a dislocation density, originating from interfaces between an indium containing well layer and barrier layers, less than 9×10⁹ cm⁻². The III-nitride device is grown with an interruption time, between growth of the well layer and barrier layers, of more than 1 minute.

The present invention is directed to a novel capacitor. The capacitor may be used in electric double layer capacitors. The capacitors include a polarizable electrode including activated carbon and a non-polarizable electrode including lead dioxide and lead sulfate. The capacitors of the present invention provide considerably higher electric capacity, higher durability, and low resistance, while maintaining high conductivity. Additionally, the electrodes may be produced more quickly and inexpensively.

A Vertical Cavity Surface Emitting Laser (VCSEL) and its fabrication are taught which incorporate a high contrast grating (HCG) to replace the top mirror of the device and which can operate at long-wavelengths, such as beyond 0.85 μm. The HCG beneficially provides a high degree of polarization differentiation and provides optical containment in response to lensing by the HCG. The device incorporates a quantum well active layer, a tunnel junction, and control of aperture width using ion implantation. A tunable VCSEL is taught which controls output wavelength in response to controlling a micro-mechanical actuator coupled to a HCG top mirror which can be moved to, or from, the body of the VCSEL. A fabrication process for the VCSEL includes patterning the HCG using a wet etching process, and highly anisotropic wet etching while precisely controlling temperature and PH.

An optical element, an optical device, and a display device are disclosed that are able to change a polarization state in time order and to produce polarized light with little wavelength dependence and superior in polarization purity, and able to perform pixel shift easily and accurately to realize high resolution image display. The optical element has a translucent surface parallel to the rotational axis of the optical element, and at least a portion of the translucent surface is formed from an optically anisotropic medium. A polarization state of a light beam transmitting through the translucent surface is switched in time order along with rotation of the optical element.

The invention discloses a lithium battery electrode preparation method including polymer material with a stable interface and the application of a lithium battery electrode in a solid lithium battery. The preparation method is characterized in that the polymer material with the stable interface is poly-vinylene carbonate (PVCA) or copolymers thereof. The free radical triggers the monomer to perform mass polymerization to obtain a polymer, the polymer material with the stable interface can form a cover film on the surface of the electrode, thus destruction on the electrode material and decomposition of the solid electrolyte on the surfaces of the positive and negative electrodes can be effectively restrained. Meanwhile, the polymer material can form a stable protection layer on the surface of lithium metal to inhibit the growth of the lithium dendrites, thus the cycle performance of the solid lithium battery is improved. The invention also provides a preparation method of the electrochemical stable polymer material, and the solid lithium battery assembled by using the polymer material.

A main object of the present invention is to provide a polarizing plate having a good polarization performance, capable of being reduced in thickness, and showing excellent manufacturing efficiency. To attain the above mentioned object, the present invention provides a polarizing plate comprising: a base material; a resin layer formed on the base material and having concave portions or convex portions formed in a pattern on its surface; and a polarizing layer formed on the resin layer and comprising a tabular dye.

The present invention provides a polarizing film with high polarization degree and high transmittance, which is directed to the use of polyvinyl alcohol (PVA)-based film by subjecting to a monoaxial multi-step dry-stretch process, thereafter conducting a swelling process in a water-washing tank, cross-dyeing in a dyeing-crosslinking tank comprising an aqueous iodine containing solution, then subjecting to a post stretch process in an stretch tank 05 comprising PVA crosslinking agent, as to obtaining a polarizing film with a transmittance of at least 43% and a polarization degree of at least 98%; and the producing method thereof, a polarizing plate and an optical component produced from the same.

This invention has the polarizing function of polarizing an input beam and a non-reflecting function of suppressing reflection of the input beam, wherein at least one side of a light-transmissive substrate 1 has a polarizing portion 4 with a striped structure formed by multiple alternating light-transmissive dielectric layers 2a, 2b . . . and metallic film layers 3a, 3b . . . . Its characteristics are improved if the metallic film layers are very thin and flat, with a target thickness in the range from 5 to 20 nm and variation of film thickness within the range of ±10%.

The production and usage of hyperpolarized 129Xenon which comprises providing solid xenon with either an internal (dissolved) or external (imbedded) nuclear spin relaxant, loading and positioning the solid xenon in a low temperature refrigerator operating in the range of 5 mK to 30 mK with a surrounding magnetic field of between about 10 and 20 Tesla enabling high xenon spin polarizations between about 10% and 50% to be obtained in a time of about 1-3 days owing to the properties of the relaxant, separating the xenon from the relaxant or otherwise rendering the relaxant inoperable after polarizing and thereby switching off further relaxation and insuring preservation of the polarization of the xenon in solid, liquid or gaseous form for storage or external use for long times, ranging from weeks to the order of minutes, depending on the usage conditions.

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.

A light emitting device having a relatively simple configuration is provided that emits stable light having a plurality of wavelengths. The light emitting device 1 comprises, in sequence, a composite substrate 3 and a gallium nitride-based semiconductor layer 5 including a light emitting layer 9. The composite substrate 3 includes a base 19 and a gallium nitride layer, the gallium nitride-based semiconductor layer 5 being disposed on a principal surface of the gallium nitride layer, the angle θ defined by the c-axis of the gallium nitride layer and a normal line N1 to the principal surface S1 of the gallium nitride layer ranging from 50 to 130 degrees, the light emitting layer 9 emitting light with an absolute value of the degree of polarization of 0.2 or more, the base 19 containing a fluorescent material that emits a fluorescent light component induced by irradiation of a light component emitted from the light emitting layer 9. Accordingly, the light emitting device 1 can emit white light produced by superposition of blue light directly emitted from the light emitting layer 9 and yellow light induced by blue light incident on the base 19 from the light emitting layer 9.

A process for producing a wire-grid polarizer; the wire-grid polarizer comprising: a light-transmitting substrate 14 having a surface on which a plurality of ridges 12 are formed in parallel with one another at a predetermined pitch; and a first cover layer 20 comprising a metal layer 22 and a metal oxide layer 21 and covering a first side surface 16 of each ridge 12, the maximum covering thickness of the cover layer 20 in a lower region of the ridge 12 being smaller than the maximum covering thickness of the cover layer 20 in an upper region of the ridge 12; the process comprising: forming the metal layer 22 by vapor-depositing aluminum so that no oxide is formed in the metal layer; and forming the metal oxide layer 21 by vapor-depositing aluminum under the presence of oxygen so that oxygen defects are formed in the metal oxide layer 21.

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 relates to an arrangement and a method for providing contrast agent for e.g. MRI (Magnetic Resonance Imaging) and NMR (Nuclear Magnetic Resonance) applications. The method according to the invention comprises the steps of obtaining (100) a solution in a solvent of a hydrogenatable, unsaturated substrate compound and a catalyst for the hydrogenation of a substrate compound, hydrogenating (110) the substrate with hydrogen gas (H₂) enriched in para-hydrogen (p-¹H₂) to form a hydrogenated contrast agent and exposing (120, 305) the contrast agent to a sequence of pulses of magnetic field. The apparatus comprises a magnetic treatment unit (240) equipped with means for producing pulses of magnetic field.

A patterned polarizing film is provided for obtaining a thin patterned circular polarizing plate having a superior anti-reflection property. The film includes a substrate and a patterned liquid crystal cured layer laminated thereon. The layer contains a polymer of a polymerizable liquid crystal compound(s) and a dichroic dye. The patterned polarizing film includes a region (A) having a degree of polarization of 10% or lower and a single transmittance of 80% or higher, and a region (B) having a degree of polarization of 90% or higher and a single transmittance of 40% or higher.

Provided is a method for manufacturing a thin polarizing film having good optical characteristics. The method of the present invention comprises the steps of: preparing a stack (10) by forming a polyvinyl alcohol-based resin layer (12) on a thermoplastic resin base (11) having a coefficient of water absorption of between 0.2% and 3.0% and a glass transition temperature (Tg) of 60 C or greater, and drawing the stack (10) while immersed in a boric acid solution.