272results about How to "Good optical stability" patented technology

The light-emitting device includes a light-emitting element chip; a package having a first recessed portion thereon, in which the light-emitting chip is disposed; a transparent flexible member covering at least the recessed portion; and a transparent rigid member disposed on or above the transparent flexible member. The package has at least a first front surface extending at least outwardly above the first recessed portion; a second front surface extending outwardly above the first front surface; and a third surface as the outside of the package extending outwardly above the second front surface. The rigid member is disposed in the outline of the second front surface with at least three points of contact. The flexible member is continuously provided along the first front surface, the second front surface and the back surface of the rigid member. This light-emitting device is capable of improved reliability without deteriorating its optical characteristics.

Method of fabricating an optical element. A photodefinable composition is provided that includes (i) a hydrophobic, photodefinable polymer, said photodefinable polymer having a glass transition temperature in the cured state of at least about 80° C.; and (ii) a multiphoton photoinitiator system comprising at least one multiphoton photosensitizer and preferably at least one phtoinitiator that is capable of being photosensitized by the photosensitizer. One or more portions of the composition are imagewise exposed to the electromagnetic energy under conditions effective to photodefinably form at least a portion of a three-dimensional optical element.

The invention provides a three-silver low radiation film glass. The film layer structure of the glass comprises glass, a first base layer dielectric combination layer, a first Ag layer, a first blocking layer, a first interlayer dielectric combination layer, a second Ag layer, a second blocking layer, a second interlayer dielectric combination layer, a third Ag layer, a third blocking layer, a first upper layer dielectric combination layer, and a second upper layer dielectric combination layer. The invention also provides a process for producing the glass. The three-silver low radiation film glass and the producing process thereof adopt a unique film layer configuration, the process and a method improve the prior low radiation film glass so that the product has low radiance and good selectivity coefficient Lsg; the indoor and outdoor colors of the glass are close to neutral color without interference colors; and the glass has excellent optical performance, various colors, weather resistance, and the like, and can be widely popularized and applied to vehicle glass and civil architecture glass.

An optical imaging module includes six lens elements, the six lens elements being, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. The first lens element has negative refractive power. The second lens element has an image-side surface being concave. The third lens element has an image-side surface being convex. The fourth lens element has positive refractive power. The fifth lens element with negative refractive power has an object-side surface being concave and an image-side surface being convex. The sixth lens element has an image-side surface being concave, wherein an object-side surface and the image-side surface of the sixth lens element are both aspheric, and the image-side surface of the sixth lens element includes at least one inflection point.

This invention relates to reflective cholesteric displays without using Bragg reflection. The helical pitch of the cholesteric liquid crystals may or may not be tuned in a visible wavelength, but its Bragg reflection will never be displayed. An elliptical polarizer with properly designed retardation and lamination positioned at the front of the display will be able to eliminate the Bragg reflection over a large viewing cone. The function of the display cell structure is merely a light shutter to switch the incident light ON and OFF. In the black-and-white display mode, the white state is achieved from the metal reflection in the cholesteric planar texture area; and the black state is obtained by cholesteric's depolarization effect and polarizer's filtration effect in the cholesteric focal conic texture area. In the full color mode, the full color state is created by the metal reflector and the micro-color filter in the cholesteric planar texture area; and the black state is realized in the cholesteric focal conic texture area. The reflective cholesteric display, remaining its long-term bistability but not applying the narrow-band Bragg reflection, initiates novel displays with a neutral wide-band reflection.

It is an object of the present invention to provide a method for manufacturing a birefringent film that can reduce the amount of a remaining solvent in the birefringent film without degrading appearance uniformity or an alignment in its thickness direction. The method of the present invention for manufacturing an optical film includes the steps of coating a base with a polymer solution obtained by dissolving a polyimide-containing polymer in a solvent so as to form a coating film; and drying the coating film so as to form a birefringent film, in which the drying step includes at least two stages of drying processes. The drying step preferably include two stages of the drying processes, and a temperature in the former stage of the drying process is preferably lower than a temperature in the latter stage of the drying process. If adding a step of providing the birefringent film with an anisotropy of a refractive index in an in-plane direction, a birefringent film with an optical biaxiality can be manufactured.

The invention relates to a preparing method of an amino carbon quantum dot fluorescence silicon substrate imprint sensor and belongs to the technical field of preparation of an environment function material. The preparing method comprises the following steps: dissolving citric acid and a polymine solution to obtain a transparent solution, then transferring to a hydrothermal reaction kettle for reaction, and then cooling to room temperature to obtain dispersion liquid of amino carbon quantum dots; centrifuging the dispersion liquid to obtain an amino carbon quantum dot solution; then taking the amino carbon quantum dots as fluorescence carriers, p-nitrophenol as template molecules, (3-aminopropyl) triethoxy silane as a function monomer, and tetraethoxysilane as a cross-linking agent so as to obtain a fluorescence molecular imprinted polymer to be used for optical detection of p-nitrophenol. The amino carbon quantum dot fluorescence molecular imprinted polymer has very good optical and pH stabilities and has te capacity of selectively recognizing p-nitrophenol.

The invention belongs to the field of a composite luminescent material, and discloses a fluorescent carbon quantum dot/mesoporous alumina composite luminescent material, and a preparation method and application thereof to the oxygen sensing aspect. The composite luminescent material comprises fluorescent carbon quantum dots and mesoporous alumina used as a substrate material, wherein the fluorescent carbon quantum dots are fluorescent carbon quantum dots containing hydroxyl or amidogen, and the size is 10nm or below. The specific surface area of the mesoporous alumina is large; the pore diameter distribution is narrow, i.e., the specific surface area/pore volume rate is high; the surface has many hydroxyl; through the hydrogen bond effect, the fluorescent carbon quantum dots with hydroxyl and amidogen at the surface can be easily adsorbed; through simple experiment operation, the fluorescent carbon quantum dots with the proper pore diameter can be assembled into a pore passage of the mesoporous alumina; the fluorescent carbon quantum dot/mesoporous alumina composite luminescent material is formed. Oxygen molecules can be uniformly dispersed in the pore passage of the mesoporous alumina; an oxygen sensing material with high luminescent stability, high sensitivity and short reaction time is formed.

The invention discloses a donor-acceptor type fluorenyl nanometer grid material, a preparation method and application thereof. The nanometer grid material is of a square-ring-shaped rigid structure formed through alternative arrangement of fluorenyl ramification regarded as electron donor units and electron acceptor units. The preparation method comprises the following steps that a precursor with tertiary alcohol and aromatic nucleus terminal based hydrogen inhibitor dual binding sites is dissolved in organic solvent; at the room temperature, a catalyst is added, and stirring and reacting are conducted; and the reaction is conducted for 5 min-12 h, and products are obtained through chromatogram column separation. The donor-acceptor type fluorenyl nanometer grid material has the advantages that the compounding method is modularized, extensibility and stability of thermology, electrochemistry and photology are high; dependency of thin film solvent is reduced; large-area soluble processing is achieved; the size of apertures is accurately regulated and controlled; and accurate regulation an control of band gaps and energy level arrangement are achieved. The donor-acceptor type fluorenyl nanometer grid material has potential application prospects in the fields of photoelectric function materials of organic solar cells, storage and memory resistor, sensing, detecting and the like.

An embodiment of the invention provides an array substrate and a manufacturing method thereof, and a display apparatus and relates to the display technology field. Stability of a thin film transistor in a pixel unit can be guaranteed and the size of the thin film transistor in a grid driving circuit can be reduced so as to realize a narrow frame design. The array substrate comprises the pixel unit and the grid driving circuit. The pixel unit comprises a first film transistor. The grid driving circuit comprises a second film transistor. An active layer of the first film transistor comprises a first metal oxide pattern and a second metal oxide pattern which are stacked. An active layer of the second film transistor is a third metal oxide pattern. Optical stability of the second metal oxide pattern is greater than optical stability of the first metal oxide pattern. Carrier mobilities of the first metal oxide pattern and the third metal oxide pattern are greater than a carrier mobility of the second metal oxide pattern. The display apparatus is used for the array substrate comprising the grid driving circuit and the pixel unit.

An optical recording medium dye is described. The optical recording medium dye is an azo metal chelate compound, wherein the azo metal chelate compound comprises the following structure: wherein R1 is a hydrogen atom, a C1-6 straight chain or branched alkyl group, an amino group, an alkylamino group or a tolylamino group; R2 is a hydrogen atom, a hydroxyl group, a halogen atom, an ether group, a C1-6 straight chain or branched alkyl group; R3 is a hydrogen atom, a C1-6 straight chain or branched alkyl group; R4 is a hydrogen atom, a C1-6 straight chain or branched alkyl group or a halogen atom; A3 is a residue forming a heterocyclic ring derivative together with a carbon atom and a nitrogen atom.

The invention provides a preparation method of a quantum-dot phosphorescent imprinted polymer, belonging to the technical field of preparation of environment function materials. The preparation method comprises the following steps: first, synthesizing Mn-ZnS quantum dots by ZnSO4.7H2O, MnCl2.4H2O and Na2S.9H2O; then, adding (3-mercaptopropyl) trimethoxyl silane (MPTS) to modify to obtain the MPTS-modified Mn-ZnS quantum dots; and then, synthesizing a phosphorescent molecularly imprinted polymer with 2,4,5-trichlorophenol as template molecules by means of hydrolysis of tetraethoxysilane (TEOS) and optically detecting 2,4,5-trichlorophenol by the polymer. The phosphorescent molecularly imprinted polymer is good in optical and pH stability, and has the ability of selectively identifying 2,4,5-trichlorophenol.

The invention discloses application of carbon dots in preparing an anti-ultraviolet product. The anti-ultraviolet product can be fiber, cosmetics, coating, printing ink or resin. The anti-ultraviolet product prepared from the carbon dots is remarkable in UVA (Ultraviolet A) and UVB (Ultraviolet B) absorption effect and low in production cost, and the obtained product has the advantages of safety (no toxicity), stability (difficulty in decomposition) and the like.

An integrated type optical coupling device capable of easily accurately performing an optical arrangement between a narrow-pitch multi-channel optical waveguide and an optical fiber array and a master used in fabricating the same are provided. By forming a fixing projection between the optical fibers, the dynamic stability of the optical fiber array is increased and the optical arrangement between the optical waveguide and the optical fiber is easily accurately performed by hand. Accordingly, the cost required for the alignment is reduced and the alignment error due to the rolling of the optical fiber is not generated. In addition, the multi-step metal master is fabricated by using a photoresist film for X-ray exposure, and the narrow-pitch multi-channel optical coupling device is fabricated in a hot embossing method using the same, thereby the high-integrated device can be fabricated at a low price.

The invention provides a fluorescent probe for detecting the polarity in a cell lipid droplet. The fluorescent probe has a chemical structural formula as shown in the specification. The fluorescent probe emits relatively strong fluorescence in a lipid droplet environment of a cancer cell with relatively small polarity, and emits weak fluorescence in the lipid droplet environment of a normal cell with relatively large polarity, therefore, normal cells and cancer cells can be distinguished; the fluorescent probe can be accurately positioned in lipid droplets, and has relatively high sensitivity,good optical stability and specific polarity response, so that detection of the polarity of lipid droplets in cells can be realized. By utilizing the probe provided by the invention, the content of lipid droplets in cells can be evaluated and studied by fluorescence imaging technology, and the probe has a potential application value for studying and obtaining the physiological function of lipid droplets in cells. At the same time, synthesis steps of the probe are simple, the purification is convenient, and the yield is high.

The invention discloses a spectroscopy water environment online measuring device. The output end of a controller is connected with a light source and a detector; continuous pulse light transmitted by a light source module is divided by a Y-type optical fiber into two beams which are respectively used as a measuring light source and a reference light source; the reference light source is connected to a reference detector through a reference optical fiber, and the reference detector converts a reference optical signal to a reference electric signal to be inputted to the controller; the measuring light source enters a reflection probe, detection light transmitted by the reflection probe enters a circulation pond and then shines on a reflection mirror, the reverse reflected light reflected by the reflection mirror enters the circulation pond, returns into the reflection probe and then enters the detector through a receiving optical fiber, and the detector performs the photoelectric signal conversion and transmits the converted signal to the controller. The spectroscopy water environment online measuring device has beneficial effects that by adopting the same light source, the influence caused by the fluctuation such as the aging of the light source can be effectively eliminated, and the optical stability is better; light in the ultraviolet-visible light waveband is used as an integral spectrum, so that the sensitivity and the accuracy are higher.

The invention discloses a preparation method of a luminous crystal material capable of selectively detecting Fe<3+> ions. 4-amidogen-3,5-di(3-pyridyl)-1,2,4-triazole (3-abpt) and zinc nitrate hexahydrate are added into a mixed solution of acetonitrile and N,N'-dimethyl formamide to be stirred to be prepared into a solution; 1,4-naphthalic acid (1,4-ndc) is added into the prepared solution to be stirred until the solution is clear; the solution is put into a sealed reaction kettle for heating reaction for three days; after the temperature is slowly lowered, filtering, washing and drying are performed to obtain the luminous crystal material {[Zn2(1,4ndc)2(3abpt)].H2O}n. The preparation method has the advantage that the luminous crystal material {[Zn2(1,4ndc)2(3abpt)].H2O}n capable of efficiently and selectively detecting the Fe<3+> ions is obtained.