54 results about "Refractive index" patented technology

The invention provides a high strength organic / inorganic nano composite film layer materials and method for preparation, wherein the composition comprises 10-13% of titanate, 7-17% of silicane coupling agent, 0-6% of silicate ester, 40-65% of alcohol solvent and 1-4% of water. The preparation of the composition consists of using inorganic acid as catalyst, co-hydrolyzing titanate, silicate and silane coupling agent in dimethyl carbinol, coating the obtained paint by rotary, dipping or spraying methods onto the surface of the appliances, finally solidifying 1-3 hours at 135- 150 deg. C.

There is provided an optical member comprising: a first optical layer having: a first main face formed with a concave section having a concave curved surface, and a plurality of convex ridges having concave curved surfaces provided in concentric circular fashion around said concave section; and a second main face formed with: a convex section having a convex curved surface that is provided facing the concave section and constituting a second main face facing the first main face; and a plurality of convex ridges having convex curved surfaces provided facing the plurality of convex ridges having the concave curved surface, provided in concentric circular fashion around the convex section; and a second optical layer provided on the first main face of the first optical layer; and a third optical layer provided on the second main face of the first optical layer; wherein the refractive index of the first optical layer is higher than the refractive index of the second optical layer and is higher than the refractive index of the third optical layer.

The invention discloses a standard interference piece fitting method capable of acquiring film thickness and refractivity simultaneously. A to-be-detected film only needs to be coated on two standard interference pieces coated with a layer of film with already-formed interference and different refractivity. Thus, through simultaneously fitting a transmitting (reflecting) spectrum before and after coating of the two standard interference pieces, the thickness and the refractivity of the to-be-detected film can be acquired precisely at the same time, the film thickness measurement limit can be as high as 1nm, and compared with the 30nm measurement limit in the traditional method, great improvement exists. In addition, as the two standard interference pieces are fit simultaneously, errors of a test system can be greatly reduced, and requirements on performance of the test system and the cost can be significantly reduced. The method is applicable to online detection and monitoring of a film coating system and can be promoted and used in industrial production or scientific research.

The invention discloses a column-shaped electromagnetic wave stealth device with four-direction stealth effects. The column-shaped electromagnetic wave stealth device with the four-direction stealth effects comprises four first medium units and four second medium units, wherein the first medium units and the second medium units are isotropic and are transparent relative to incident electromagnetic waves, the refractive index of each first medium unit is larger than the refractive index of each second medium unit, the first medium units are column bodies, the cross sections of the column bodies are of isosceles triangle shapes, the second medium units are column bodies, and the cross sections of the column bodies are of isosceles triangle shapes or isosceles trapezoid shapes. Each second medium unit is arranged between every two adjacent first medium unit, adjacent second side walls are opposite to first side walls, and all third side walls face a stealth area. When the cross sections of the second medium units are of the isosceles triangle shapes, all fourth side walls face background media. When the cross sections of the second medium units are of the isosceles trapezoid shapes, all sixth side walls face the ground media and all seventh side walls face the stealth area. The column-shaped electromagnetic wave stealth device has the stealth effects of four directions, is insensitive to the polarization direction of the electromagnetic waves, and is suitable for a whole electromagnetic wave section.

The invention belongs to the field of inorganic/polymer optic nano composites and particularly relates to a transparent high-refractivity graphene quantum-dot/polymer nano composite film and a preparation method thereof. The composite film is formed by graphene quantum-dot and polymer through ultraviolet curing and thermocuring. Before curing, in each 1mL of polymer monomer, the content of graphene quantum-dot is 0.1-1g. The graphene quantum dots (GQDs) is used as inorganic nano phase, the polymer monomer is used as solvent, the GQDs is synthetized in the polymer monomer by the solvothermal method and then are directly cured to be film by filtering, spraying coating, adding trigger, and double treatment of ultraviolet curing and thermocuring. The transmissivity of the transparent high-refractivity graphene quantum-dot/polymer nano composite film prepared by the film materials ranges from 80% to 95%, refractivity ranges from 1.5 to 2.8, and the transparent high-refractivity graphene quantum-dot/polymer nano composite film can be applied to antireflection coating, optical waveguide materials, optical lenses and other photoelectric fields.

Described herein are embossing methods for forming pico liter well arrays (and other structures), arrangements of such pico liter well arrays, for example, in arrays of pico liter well areas, and methods of forming templates for such embossing. Also described as wells with a refractive index similar to that of an aqueous medium used for supporting cells in the wells.

In a liquid crystal display device including a light control film utilizing total reflection, a liquid crystal panel, and a directional backlight, the light control film includes a transparent base material, a light blocking layer, and a light diffusing portion. The light diffusing portion has a light output end surface on side closer to the transparent base material and a light input end surface on side opposite to the transparent base material, the light input end surface having a larger area than the light output end surface. A film thickness of the light diffusing portion is larger than a thickness of the light blocking layer. A material having a smaller refractive index than the light diffusing portion is present in a cavity defined by the light diffusing portion, and the film anisotropically diffuses light.

The configurations of an electro-optic Bragg deflector and the methods of using it as a laser Q-switch in a Q-switched laser and in a Q-switched wavelength-conversion laser are provided. As a first embodiment, the electro-optic Bragg deflector comprises an electrode-coated electro-optic material with one of a 1D and a 2D spatially modulated electro-optic coefficient. When a voltage is supplied to the electrodes, the electro-optic material behaves like a Bragg grating due to the electro-optically induced spatial modulation of the refractive index. The second embodiment relates to an actively Q-switched laser, wherein the electro-optic Bragg deflector functions as a laser Q-switch. The third embodiment of the present invention combines the Q-switched laser and a laser-wavelength converter to form a Q-switched wavelength-conversion laser, wherein the EO Bragg deflector can be monolithically integrated with a quasi-phase-matching wavelength converter in a fabrication process.

An optical system includes an aperture stop, and a focus lens unit arranged on an image side of the aperture stop, the focus lens unit having a negative refractive power and moving during focusing. The focus lens unit moves toward the image side during focusing from infinity to close distance. The focus lens unit includes a positive lens PL and a negative lens NL. An Abbe number νdNL of the material of the negative lens NL, a refractive index NdNL of the material of the negative lens NL at d-line, and an Abbe number νdPL of the material of the positive lens PL are set appropriately.

The alicyclic compound of the present invention has a five- or more membered ring structure having an epithioethylene linkage and/or an epidithioethylene linkage, and has tow or more sulfur atoms in its molecule. Optical materials produced by curing the alicyclic compound or a composition containing the alicyclic compound by polymerization show high refractive index.

A light-diffusing layer 16 having at least a bicontinuous phase structure is formed by coating a substrate 14a with a coating liquid composition containing a plurality of resins being different in refractive index with each other, drying the substrate, and heating the resultant to cause spinodal decomposition from the resin-containing layer on a transparent substrate. A transparent conductive layer (or a transparent electrode) 17 may be formed on the light-diffusing layer 16 of the substrate 14a. A liquid crystal cell 13 of a reflective liquid crystal display apparatus may be formed by facing the transparent conductive layer 17 with a reflection electrode 19 formed on the other substrate 14b, and sealing a liquid crystal 18 between a pair of electrodes, 17 and 19. The present invention, therefore, provides a light-diffusing layer capable of uniformly and brightly displaying an image on a screen in a reflective liquid crystal display apparatus of an internal light-diffusing layer system in which the light-diffusing layer is formed on a substrate of a liquid crystal cell.

In an integrated optical lightguide device including a light-transmitting core layer, an inclusion or buffer layer, and an active or cladding layer. The cladding layer is divided into segments. Groups of different segments exhibit different refractive indices, light intensity profiles or different degrees of sensitivity which have been effected by different methods. Thus, repeated adjustable or controllable transmission has resulted in an extremely sensitive waveguide system for a sensor, a modulator, or a spectrophotometer.

A diffraction grating of the present invention includes a first block (101) and a second block (102). The first block (101) is made up of a plurality of input waveguides (103), a slab waveguide (104), a delay waveguide array (105) and narrow grooves (106): each of which being filled with resin. The second block (102) is made up of a plurality of input waveguides (107), a slab waveguide (108) and a plurality of output waveguides (109). Since a circuit is cut off at the ends of the arrayed waveguides, a relative phase can easily be measured. The resin has undergone a refractive-index adjustment and compensates a phase error.

The invention provides an angular displacement laser interferometer calibration method and an angular displacement laser interferometer calibration device based on four standard optical axes, and belongs to the technical field of laser measurement. Four measuring light beams of a laser interferometer to be calibrated pass through a middle through hole of a four-axis hollow laser interference mirror group, and are parallelly arranged in the center position of four parallel standard measuring light beams; in a quadrilateral region formed by projection points of the four standard measuring light beams at the plane, the differences of environment interference degrees of the four standard measuring light beams and the four measuring light beams of the laser interferometer to be calibrated are very small, and the air refractive index average value of the standard measuring light beams is approximate to the air refractive index value of the measuring light beams of the laser interferometer to be calibrated.

The optical fiber coupler array can be capable of providing a low-loss, high-coupling coefficient interface with high accuracy and easy alignment between a plurality of optical fibers (or other optical devices) with a first channel-to-channel spacing, and an optical device having a plurality of closely-spaced waveguide interfaces with a second channel-to-channel spacing, where each end of the optical fiber coupler array can be configurable to have different channel-to-channel spacing, each matched to a corresponding one of the first and second channel-to-channel spacing. Advantageously, the refractive indices and sizes of both inner and outer core, and/or other characteristics of vanishing core waveguides in the optical coupler array can be configured to reduce the back reflection for light propagating from the plurality of the optical fibers at the coupler first end to the optical device at the coupler second end, and/or vice versa.

The invention discloses a light circular-polarization modulator, including a light input coupler, a light output coupler and at least a birefringent regulable crystal, where the crystal can change the shape or major axis orientation of its refractive index ellipsoid under the action of electric, magnetic, temperature and light fields or force, by this characteristic, able to modulate levorotary and dextral circularly-polarized lights, thus realizing the convenient and practical effect, and mainly applied to chiral substance detection and identification, communication coding and optical teaching.

The invention provides a multi-parameter measuring device based on a double-clad optical fiber. The device comprises a light source 1, a single-mode optical fiber 2, a polarizer 3, a polarization controller 4, the double-clad optical fiber 5 with a tilted grating 6 and a signal demodulator 7 which are connected in sequence. The double-clad optical fiber is provided with an inner cladding and an outer cladding, and the tilted grating is engraved on a fiber core. Light emitted by the light source forms a comb-shaped transmission spectrum after passing through the tilted grating, and the transmission spectrum comprises a Bragg resonance peak, an inner cladding resonance peak and an outer cladding resonance peak. When the external environment of the tilted grating changes, the transmission spectrum of the tilted grating changes, and real-time detection of parameters such as temperature, bending, axial strain and refractive index is realized by monitoring the changes of the wavelength and intensity of the resonance peaks, which has the advantages of small size, quick response, high sensitivity and the like.

A synthetic quartz glass substrate is prepared by furnishing a synthetic quartz glass block, coating an arbitrary surface and an opposite surface of the block with a liquid having a transmittance of at least 99.0%/mm at the wavelength of birefringence measurement, measuring the birefringence of the block by letting light enter one coated surface and exit the other coated surface, and sorting the block to an acceptable or unacceptable group, based on the measured birefringence value.

There is disclosed an optical disk constituted by covering an information recording layer formed on a substrate with a cover layer having a light transmission property, in which ranges of a thickness t and a refractive index n of the cover layer are defined. That is, a function f(n) which is not a constant regarding the refractive index n of the cover layer, and constants t1, t2 determined based on an allowable value of an aberration in the cover layer are used to set the ranges of the thickness t of the cover layer to a range of f(n)−t1≦t≦f(n)+t2.

The invention discloses a chip of a light-emitting diode and a preparation method of the chip, and the chip and the preparation method belong to the field of semi-conductors. The chip comprises a substrate layer, an N-type layer, a light-emitting layer, a P-type layer, a transparent conductive layer, an N electrode and a P electrode which are respectively led out from the N-type layer and the P-type layer, and transparent medium layers covering the bottom surface of the substrate layer and/or the upper surface of the transparent conductive layer; the index of refraction of the transparent medium layer covering the bottom surface of the substrate layer is higher than that of the substrate layer; the index of refraction of the transparent medium layer covering the upper surface of the transparent conductive layer is higher than that of the transparent conductive layer; the transparent medium layer covering the bottom surface of the substrate layer comprises a plurality of bulges which extend out from the bottom surface of the substrate layer; and the transparent medium layer covering the upper surface of the transparent conductive layer comprises a plurality of bulges which extend out from the upper surface of the transparent conductive layer. According to the chip of the light-emitting diode and the preparation method thereof, the light extraction efficiency of a light-emitting diode (LED) is improved.

A novel optical plastic fiber comprising a core region and having a center line along a longitudinal axis of the fiber is disclosed. The refractive index of the core region increases along a direction going from a periphery portion to the center line in any plane perpendicular to the center line, and the birefringence index of the core region varies along a direction going from the center line to a periphery portion perpendicular to the center line in any plane parallel to the center line and containing the center line.

The invention discloses a preparation method and application of a self-repairing microcapsule and liquid type blue-light-resistant optical coating. The preparation method comprises the steps: firstly preparing a submicron-scale or micron-scale urea formaldehyde microcapsule containing a liquid type self-pairing agent, wherein the refractive index of the self-repairing agent is highly matched with that of a macromolecular material for preparing the coating; mixing the microcapsule, the macromolecular material and a blue light absorbent in an organic solvent uniformly at a certain ratio to obtain a product solution; and finally coating a substrate material with the obtained solution by a certain method to obtain the functional optical coating. The functional coating prepared by the method has excellent blue-light resistance; meanwhile, the coating is integrally transparent, and can finish self repairing by virtue of the liquid type self-repairing agent released by the microcapsule which is broken simultaneously through swelling coating when being damaged by an external force; compared with the traditional blue-light-resistant functional coating adopting a multi-layer structure, and the functional coating is simpler in preparation process and lower in cost.

The invention provides a liquid crystal lens device, comprising a first substrate, multiple first primary electrodes, multiple first auxiliary electrodes, a first alignment layer, a second substrate, multiple second primary electrodes, multiple second auxiliary electrodes, a second alignment layer, a liquid crystal layer, and a voltage supply unit. According to the invention, the voltage supply unit can be used to supply different drive voltages to the multiple first primary electrodes, the multiple first auxiliary electrode, the multiple second primary electrodes, and the multiple second auxiliary electrodes, thereby enabling the liquid crystal layer to change the axial direction and the refraction rate according to the different drive voltages. Therefore, view angle ranges with good 3D visual effects can be selected by a 3D screen according to the positions of users.