102results about How to "Excellent spectral performance" patented technology

The invention discloses perylene diimide-based photoelectric functional materials and a preparation method thereof. A series of polymers with different contents are prepared through Suzuki polymerization, Yamamoto polymerization, Stille polymerization or Sonogashira polymerization. The materials have good thermal, photic and chemical stability and good application prospects in the fields such as organic solar cells and the like. The structural formula of the perylene diimide-based polymers is shown in the specification, wherein a is a number between 1 and 30; b is a number between 0 and 30; R is C1-C10 alkyl or alkoxy; A1 is any one of the following structures shown in the specification, wherein n is a number between 1 and 10; and R is C1-C10 alkyl.

The invention relates to a film thickness monitoring method capable of increasing spectral characteristics of film, for a computer-controlled coating device. The method comprises the following steps: (1) inputting coating parameters to a computer before coating; (2) selecting the monitoring wavelengths and monitoring glass number satisfying the limited conditions through the calculation of the computer to obtain a coating monitoring table of the coating system, wherein lambda Min<lambda<lambda Max and the coating monitoring table contains sequential films of the coating system, the corresponding monitoring wavelengths and monitoring glass serial numbers; and (3) coating and the like. By adopting the method, the monitoring wavelengths and required mininum monitoring glass number can be automatically selected; by adopting the proportional film thickness monitoring method, the film thickness monitoring error can be reduced, the film thickness monitoring precision can be increased and the normalized coating system and the non-normalized coating system can be monitored. Under the condition that the control precision of the film thickness monitoring system is not changed, the spectral characteristics of the film can be effectively increased.

An optical filter may include a first reflector and a second reflector. The first reflector may include a plurality of first gratings having a first sub-wavelength dimension and being arranged to recur at a first interval in a first direction. The second reflector may be spaced apart from the first reflector and include a plurality of second gratings having a second sub-wavelength dimension and arranged to recur at a second interval in a direction parallel to the first direction. The first reflector and the second reflector may include different materials or different geometric structures from each other. Accordingly, it is easy to adjust the transmission wavelength characteristics of the optical filter.

A system and method are provided for calibrating an interleaved digital-to-analog converter (DAC). Sets of sub-DACs are enabled, and by creating a high frequency fundamental signal, spurs can be driven down sufficiently low in frequency to be sampled and digitally converted. By minimizing the power of these digital signals, the duty cycles of the different clock phases are calibrated. Then, sets of sub-DACs are enabled and high pass filtered, so that the spurs can be downconverted using corresponding phases of the clock, to a frequency low enough to sampled and digitally converted. The power of the digital signals is minimized as a first step in phase calibration. As a final step, all the sub-DACs are enabled, the high pass filter removed, and a high frequency fundamental signal is downconverted using at least two clock phases, so that the phase difference can be measured and corrected.

The invention discloses a laser device plant light. The laser device plant light comprises a circuit board. A semiconductor laser device pipe core is packaged on the circuit board, and a light uniformizing piece which is matched with the circuit board in shape covers the semiconductor laser device pipe core. The semiconductor laser device pipe core is an edge emitting type laser device, and a semiconductor laser device is electrically connected with the circuit board through an L-shaped heat sink. The L-shaped heat sink comprises an L-shaped negative electrode layer, an L-shaped insulating layer and an L-shaped positive electrode layer. An L-shaped groove is formed in the inner surface of the L-shaped negative electrode layer. The L-shaped positive electrode layer is embedded into the L-shaped groove. The L-shaped insulating layer is arranged between the L-shaped negative electrode layer and the L-shaped positive electrode layer. The laser device plant light can provide light rays with the wave length required by plants, and the laser device plant light has the obvious advantages of being good in spectrum performance, high in power, short in response time, small in size, high in reliability and durability, low in cost, long in service life, environmentally friendly, capable of saving energy and the like.

The invention discloses a pyrisoxazole-cnidium lactone suspension emulsion and a preparation method thereof. The suspension emulsion contains the following components in percentage by weight: 1%-40% of pyrisoxazole, 0.05%-5% of cnidium lactone, 1%-50% of a solvent, 1%-40% of an emulsifying agent, 1%-10% of a dispersant, 2%-4% of a botanical fungicide, 0.1%-10% of a thickener, 1%-5% of an anti-freezing agent, 0.1%-1.0% of an anti-foaming agent, 0.1%-1% of a preservative and the balance being water. The compound preparation can effectively prevent and control diseases and pests of crops (for example, the preparation can simultaneously prevent and control a disease, i.e., blight, and pests, i.e., cotton bollworm, of cotton), and is durable in efficacy. The compound preparation can also effectively prevent and control various diseases on crops, for example the preparation can simultaneously prevent and control white rot, gray mold and powdery mildew on grapes as well as gray mold, leaf mold and powdery mildew on tomatoes; the compound preparation has obvious effects of protecting seedlings and increasing production, is simple in production process, and has labor-saving, time-saving and energy-saving effects, obvious economic, ecological and environmental benefits, and wide development prospect.

The invention discloses a film system designing method for an optical thin film on an optical lens with high caliber-curvature-radius ratio. For optimizing the performance of the optical system, the optical thin film with excellent spectral property consistency is required to be prepared on the optical lens with the high caliber-curvature-radius ratio, therefore, film system designing for the optical thin film is required to be optimized globally. According to the film system designing method provided by the invention, firstly, thickness distribution of the optical thin film on the optical lens with the high caliber-curvature-radius ratio is determined through experiments or theoretical analysis; and secondly, the film system designing for the optical thin film is optimized globally by adopting a numerical computation method according to the requirements of spectral properties and light incident angles in all positions of the optical lens with the high caliber-curvature-radius ratio. Compared with a traditional designing method for the optical thin film, the film system designing method provided by the invention gives consideration to the thin film thickness and light incident angles on the optical lens with the high caliber-curvature-radius ratio, and is particularly suitable for thin film designing for the optical thin films on various sizes of optical lenses with high caliber-curvature-radius ratios.

The invention discloses a preparation method of titanium dioxide based graphene /La3+ carbon fibers. The preparation method includes the following steps that 1, graphene and polyacrylonitrile are dissolved in a DMF solution to prepare a graphene/polyacrylonitrile/DMF mixed solution, wherein the graphene concentration is 0.0007-0.0056 g/mL, and the polyacrylonitrile concentration is 0.08 g/mL; 2, lanthanum nitrate is added to a glacial acetic acid and tetra-n-butyl titanate mixed solution to form an La3+ doped TiO (OAc)2 solution; 3, the solution formed in the step 2 is slowly added to the graphene/polyacrylonitrile/DMF mixed solution in the step 1 under the action of mixing, and vacuum mixing is performed to obtain a spinning solution after adding is performed dropwise; 4, the spinning solution in the step 3 performs electrostatic spinning to obtain a product. The preparation method has the advantages of high strength, simple production equipment, easy and convenient operation and a good antibacterial effect.

The invention discloses an indole-triphenylamine-arylmethylidenemalononitrile solar energy co-sensitization dye, a synthetic method and application thereof. The synthetic method comprises the following steps: adopting triphenylamine as the raw material, carrying out reaction on triphenylamine and POCl3 in a DMF solvent to compound and obtain an intermediate 4-(diphenyl amido) benzaldehyde; carrying out reaction on the 4-(diphenyl amido) benzaldehyde to obtain 4-bis (4-iodophenyl) aminobenzaldehyde; respectively carrying out reaction on the 4-bis (4-iodophenyl) aminobenzaldehyde and indole, 2-methylindole and 3-methylindole to obtain an indole-triphenylamine aldehyde derivative; respectively carrying out reaction on the indole-triphenylamine aldehyde derivative and cyanoacetic acid, malononitrile or 2-(3, 5, 5-trimethyl cyclohexene-2-octenylidene) malononitrile to obtain an indole-arylmethylidenemalononitrile-triphenylamine derivative. According to the synthetic method, the relevant optical property, photo-electro transition rate and co-sensitization efficiency of the product are primarily studied, and the foundation for developing the dye into a novel solar energy co-sensitization dye with excellent properties is laid.

The invention relates to a fluorescence detection method of a pyridyl quaternary ammonium salt cationic surfactant, and its application, and also relates to a fluorescence detection agent of the pyridyl quaternary ammonium salt cationic surfactant, and its application. The fluorescence detection agent of the pyridyl quaternary ammonium salt cationic surfactant has the advantages of wide linear detection range, low detection limit, low cost and rapidness. The structural formula of the pyridyl quaternary ammonium salt cationic surfactant is shown in the specification; and in the structural formula, R is CnH2n+1, or CnH2n+1NCOCH2, n is 8-18, X<-> is Cl<->, Br<-> or I<->. The method and the agent can be used for detecting the pyridyl quaternary ammonium salt cationic surfactant in practical environment water samples, such as surface water, lake water and municipal sewage.

The invention discloses a three-band laser antireflection film and a preparation method thereof. The three-band laser antireflection film comprises a base layer; a composite layer and a MgF2 layer aresequentially deposited on the base layer; the composite layer comprises alternatively deposited YF3 layers and ZnSe layers; the base layer is connected with the YF3 layer; and the MgF2 layer is connected with the ZnSe layer. The three-band laser antireflection film provided by the invention has the single-face reflectivity of not more than 1% at the 650nm band, the single-face reflectivity of notmore than 0.25% at the 1570nm band, the single-face reflectivity of less than 0.25% at the 10.6micron band, meets the operating requirements of the multi-wavelength laser machining equipment opticalsystem, and is good in optical performance, strong in film adhesion and rub resistance, good in water resistance and temperature resistance, good spectrum performance and relatively good mechanical performance and stability, good in preparation repeatability, simple and easy to operate, and easy to control.

The invention provides additive-containing blended gasoline. In a process, a certain amount of ethanol, an oleophilic non-ionic surfactant, a hydrophilic non-ionic surfactant, a stabilizing agent and a flow-modified clean dispersing agent are added into several materials easily purchased in the market. The additive-containing blended gasoline is characterized in that: the oleophilic non-ionic surfactant is Span S-80 (sorbitantristearate); the hydrophilic non-ionic surfactant mainly comprises Tween 80 (sorbide stearic acid ester polyoxyethylene ether); an appropriate amount of lubricating agent is added to reduce mechanical friction; and the stabilizing agent is triethanolamine, sodium oleate, quadrol and the like. The additive-containing blended gasoline has obvious energy saving effect.