30results about How to "Adjust the refractive index" patented technology

The invention discloses an LED filament. The LED filament comprises multiple LED chips, at least two electrodes and a light conversion layer, wherein the multiple LED chips are electrically connected with the at least two electrodes, the light conversion layer has a top layer and a base layer, the top layer and the base layer are respectively arranged at at least two sides of the multiple LED chips and the at least two electrodes, and parts of the two electrodes are exposed by the light conversion layer. The LED filament is advantaged in that the light conversion layer has a multi-layer layered structure, layered adjustment on hardness, light transmittance and a refractive index can be realized, so hardness, light transmittance and the refractive index of the LED filament can be adjusted to an optimum state, and the LED filament can be made to satisfy different demands of LED bulb lamps.

A recordable optical recording medium comprising a recording layer containing an organic dye which can absorb a laser beam and a metal reflective layer directly or via another layer on a transparent supporting substrate having a pre-groove and a pre-pit, wherein the organic dye has a refractive index nk of 2.2 or more at a reproduction wavelength lambda2; in relation to the reproduction wavelength lambda2, the depths of the pre-groove and the pre-pit on the substrates are more than lambda2 / 4; and the following equations are satisfied:wherein r is a recording laser beam diameter represented by lambda1 / NA where lambda1 is a recording wavelength [mum] and NA is a numerical aperture for an object lens; wg [mum] and thetagr are a half value width and a cross-section tilting angle in a substrate radial direction for the pre-groove, respectively; and wp [mum], thetapr and thetapt are a half value width, a cross-section tilting angle in a substrate radial direction and a cross-section tilting angle in a tangential direction for the pre-pit, respectively.

The invention discloses a method for preparing a scratch-resistant hydrophobic anti-reflection film. The hydrophobic anti-reflection film is prepared by coating a transparent substrate with a hybrid sol, and the hybrid sol is made of hydrophobically modified hollow spheres SiO 2 Nanoparticles are cross-linked and hybridized with hydrophilic inorganic nano-binders. The method of the present invention simultaneously treats the hydrophobically modified hollow sphere SiO 2 The cross-linking between the nanoparticles and the substrate can avoid the disadvantage of no chemical bonding between the hydrophobic anti-reflection film and the substrate prepared by the traditional method, and effectively improve the wear resistance of the anti-reflection film. Hollow spheres of SiO on the hydrophobic antireflection film 2 Nanoparticles have a closed pore structure and hydrophobic properties that form a double protective barrier against moisture and pollutants. The scratch-resistant hydrophobic anti-reflection film has high optical transmittance, strong mechanical stability and long-term moisture-proof and anti-fouling properties.

The invention discloses an adjustable-refractivity silicon dioxide coated quantum dot nano composite luminescent material which is composed of SiO2 nanoparticles, wherein each SiO2 particle is a nano composite particle formed by coating SiO2 on a single quantum dot or a nano composite particle formed by coating SiO2 on multiple evenly-dispersed quantum dots. The invention also discloses a method for preparing the nano composite particles (each of which is formed by coating SiO2 on a single quantum dot or coating SiO2 on multiple quantum dots) by inverse microemulsion polymerization reaction. In practical use, the technological parameters, such as consumptions of TEOS (tetraethyl orthosilicate), surfactant, catalyst and quantum dots, reaction time and the like, can be adjusted to adjust the thickness of the SiO2 shell and the proportion of the quantum dot core in the SiO2 coated quantum dot nano composite particles, thereby adjusting the refractivity of the SiO2 coated quantum dot nano composite material. The refractivity of the nano composite luminescent material is adjustable within the range of 1.42-1.98.

The invention provides a nitride distributed Bragg reflector (DBR) and a manufacturing method thereof. The DBR adopts an AlxInyGal-x-yN / AluInvGal-u-v quaternary structure. According to the DBR, the purposes of adjusting the lattice constant or offsetting other structure stress and adjusting the refractive index are realized by adjusting the components, such as Al, In and Ga. Due to introduction of Ga and In, the growth speed is adjusted easily, and the DBR can grow at a temperature which is higher than that of growth of an AlInN layer, and higher crystal quality and interface evenness are obtained. The nitride DBR is used for manufacturing a gallium nitride-based LED containing the DBR.

To provide a pixel structure, a display device, a display and a projection display system which include a light-transmitting layer between a first substrate and a second substrate.SOLUTION: A first substrate 20 has a first reflection film 23 on a side facing toward a second substrate 21. The second substrate 21 has a second reflection film 24 on a side facing toward the first substrate 20. The first substrate 20 and the second substrate 21 form a Fabry-Perot cavity. The display luminance of a pixel structure is adjusted by adjusting the intensity of interference light of transmitted light or reflected light of the Fabry-Perot cavity.SELECTED DRAWING: Figure 2

The invention relates to ytterbium-bismuth co-doped base-free borophosphate optical glass and a preparation method thereof. The glass comprises the following components by molar percent: 45-84mol% of P2O5, 5-40mol% of B2O3, 5-35mol% of Al2O3, 6-20mol% of Y2O3, 0.01-10mol% of Yb2O3 and 0.01-5mol% of Bi2O3. The preparation method comprises the steps of raw material weighing, pre-roasting, founding,pouring, annealing and the like. According to the invention, preparation process is simple, the prepared glass contains no base and has high glass stability and strong near-infrared fluorescence emission characteristic, and the luminous intensity of bismuth ion is enhanced. The glass can be used in the fields of optical amplifiers, superpower lasers, tunable lasers, fiber-optical drawing and the like.

The invention provides ultra violet curing coating, and a preparation method and an application thereof; the coating contains light trigger, compound with mercapto, monofunctional extractant or polyfunctional group allyl compound and aliphatic diisocyanate, contains or does not contain monofunctional extractant or polyfunctional group acrylic ester; the preparation method comprises the following steps: the substances are evenly mixed under normal temperature or heating condition, and then placed stationarily, to obtain the required ultra violet curing coating. The coating is simple to be prepared, has high transparency, high gloss and adjustable refraction index, can be applied to polymer optical fiber and optical devices, and can be used as ultra violet curing agent to be applied in polymer dispersion liquid crystal.

The invention provides a biological tissue clearing reagent, comprising sorbitol, dimethyl sulfoxide, 2,2'-thiodiethanol and distilled water; the mass volume ratio of the sorbitol to distilled water is 15% to 25% ; The volume ratio of dimethyl sulfoxide to distilled water is 15%-25%; the volume ratio of 2,2'-thiodiethanol to distilled water is 40%-55%. Compared with the prior art, the present invention uses 2,2'-thiodiethanol as the main transparent component, adjusts the refractive index of the transparent reagent, and uses sorbitol to change the quaternary structure of the protein to produce a transparent effect. Dimethyl sulfoxide increases the permeability of tissues, improves the speed and effect of clearing, so that the obtained biological tissue clearing reagent can realize tissue clearing by simply processing biological samples while preserving and enhancing fluorescent labeling signals for better results. Imaging effect, wide applicability.

The invention relates to a bacterial cellulose base optical thin film and a preparation method for the bacterial cellulose base optical thin film, in particular to the bacterial cellulose base optical thin film which is high in thermo-optical stability, transparent and high in refraction index and the preparation method for the bacterial cellulose base optical thin film. Bacterial cellulose is used as a template for in-situ preparation of nanometer zinc sulfide, and then the bacterial cellulose base optical thin film is obtained after the nanometer zinc sulfide is synthesized with epoxy-type optical resin and then solidified. According to the bacterial cellulose base optical thin film and the preparation method for the bacterial cellulose base optical thin film, a nanometer zinc sulfide inorganic phase which is high in refraction index and high in thermo-optical stability is compounded in situ through a bacterial cellulose fine three-dimensional net-shaped structure, the sizes of particle diameters of the nanometer zinc sulfide and the distribution of the nanometer zinc sulfide are effectively controlled, and the refraction index of the optical film is regulated through the fact that the capacity of zinc sulfide nanometer particles is regulated. Due to the fact that the bacterial cellulose resin composite materials are used as the organic matrix of the optical film, high light transparency of resin is reserved, the extremely low coefficient of thermal expansion and excellent mechanical properties of the bacterial cellulose are also possessed, and the bacterial cellulose base optical thin film is wildly applied to the fields of optical wave guide, optical lenses, photovoltaic materials and the like.

The invention relates to a high molecular material decorated quantum dot single-mode optical fiber amplifier and a manufacturing method of the high molecular material decorated quantum dot single-mode optical fiber amplifier, and belongs to the technical field of nanometer material composite optical fiber amplifiers. According to the single-mode optical fiber amplifier, high molecular material decorated semi-conductor quantum dots are coated in a pyrometric cone region of a naked 2X2 pyrometric cone optical fiber coupler in a form of solution, and when a signal light and a pump light pass through the cone region simultaneously, the signal light is excited to be amplified by evanescent waves. The preparation of the quantum dots and the coating process are separated, so that the high molecular material decorated quantum dots are good in quality, high in concentration and good in dispersibility, are transformed into a water-soluble quantum dot coating solution from an oil phase, and are filmed on an optical fiber so as to form a composite single-mode optical fiber amplifier. The manufacturing method disclosed by the invention realizes the water-soluble semi-conductor quantum dot single-mode optical fiber amplifier which is high in gain, large in amplification width, small in size, easy to integrate, simple in manufacturing and low in cost; and the optical fiber amplifier has important real significances and application values in the super-speed and large-capacity broadband access field and the like.