53results about How to "No scattering" patented technology

The invention discloses a grower and a growing method of a laser crystal that belongs to YAS series with large size and no core, which belongs to the crystallization technology of the laser crystal. The invention comprises the grower adopting a Mo crucible pulling method heated by resistance and the crystal growing method comprising two procedures and four phases. The laser crystal of YAS series provided by the invention has large size of 35 to 50mm, high concentration (reaching 2.0at percent), no core, no dislocation and no scattering. In addition, the growing technology is stable; growing cycle is short; cost is low; and the yield of the crystal is high with above 85 percent.

The invention discloses a micro atomic cavity subjected to negative pressure forming, a micro atomic clock chip and a preparation method for the micro atomic cavity and the micro atomic clock chip. The method comprises the following steps of: etching a deep groove to form a silicon die; performing anodic bonding on the silicon die and a borosilicate glass assembled wafer under vacuum to form a sealed cavity; heating the wafer to temperature higher than glass transition temperature, preserving heat, cooling, and performing stress relief annealing on the wafer; putting a substance necessary to an atomic clock into the formed glass micro cavity, pre-bonding the glass micro cavity and a silicon substrate at room temperature in nitrogen atmosphere to seal the glass micro cavity, keeping pressure, and performing anodic bonding to obtain a sealed glass atomic cavity; corroding, and removing the silicon die to obtain a micro atomic cavity with straight vertical sides; preparing heaters on the borosilicate glass assembled wafer at the periphery of the glass micro cavity, and assembling components at the corresponding positions of the borosilicate glass assembled wafer; and preparing pins, and connecting the pins, a power supply and a processing circuit. The method is simple and low in cost.

The invention relates to a method for preparing a stable nano anatase titanium dioxide alcohol phase sol, which belongs to a preparation method of a semiconductor photoelectric material. The invention provides a simple method for preparing a nano anatase titanium dioxide nano nanocrystalline alcohol phase sol at low temperature by using a one-step method, and the raw materials comprise a titanium-containing organic matter, an organic solvent, distilled water or deionized water, a dispersant, a hydrolysis inhibitor and a catalyst with a corresponding mol ratio of 1:(20-100):(0.5-3):(1-5):(0.1-3):(0.01-1.5). According to the invention, the titanium organic matter is added in an alcoholic solution mixed with the dispersant and the catalyst, the hydrolysis inhibitor and the water are added, the materials are stirred for 3-48 hours under normal pressure and at the temperature of 25-100 DEG C, a pH value of a reactant is controlled to 1-5, and the transparent stable nano anatase titanium dioxide alcohol phase sol can be obtained. A hydrolysis intermediate product can be removed by using a dialysis technology finally. The sol has the advantages of good sol crystallinity, stability and transmittance performance, and concentration of the sol can be diluted by alcohol according to requirement. The prepared sol enables direct film forming on various high temperature-resistant or high-temperature-intolerant material substrates, and also can be used for directly preparing photocatalytic aqueous environmentally-friendly coatings or visible light-excited photocatalytic environmentally-friendly coatings.

The invention provides a polydopamine multi-level nano-drug carrier, and a preparation method and an application thereof. The preparation method comprises the following steps: S1, uniformly mixing ethanol, ultrapure water and ammonia water, then adding a dopamine hydrochloride solution, carrying out stirring at a room temperature for 25-35 h, and centrifugally collecting precipitates so as to obtain PDA microspheres with a particle size of about 120-350 nm; S2, dissolving the PDA microspheres prepared in the step S1 into ethanol, then adding ferric acetylacetonate and polyol, raising the temperature of the solution to 65-75 DEG C under a vacuum condition, keeping the temperature for 15-30 min so as to remove the ethanol, introducing nitrogen, carrying out heating to 200-220 DEG C, carryingout stirring for 2 h, continuing heating to 280-290 DEG C, carrying out stirring for 50-70 min, carrying out cooling to a room temperature, adding isopyknic acetone, carrying out separating with a magnet, and carrying out washing with ethanol so as to obtain PDA@IOs microspheres; and S3, dispersing the PDA@IOs microspheres obtained in the step S3 into a Tris-HCl buffer solution with a pH value of8-9, and carrying out stirring for 22-26 h so as to obtain the polydopamine multi-level nano-drug carrier, namely PDA@IOs@PDA nanometer microspheres. The nanometer microspheres have metal affinity, good magnetic response and high photo-thermal conversion efficiency.

The invention discloses a large-caliber laser quartz rod with the caliber of more than 320mm. The large-caliber laser quartz rod is prepared from basic weight parts of raw material of high-purity quartz sand and 2.9 to 3.3 weight parts of microelement additive, wherein the microelement additive consists of the following components in part by weight: 0.3 to 0.5 part of um oxide, 0.1 to 0.3 part oferbium oxide, 0.4 to 0.6 part of neodymium oxide, 0.2 to 0.4 part of potassium carbonate, and 0.1 to 0.3 part of alpha-alumina. The large-caliber laser quartz rod drawn by a whole rod doping preparation process has the caliber of 320mm, is not required to be coated with a film, has good optical uniformity, high transparency, no core, no scattering and no malposition, has the transmittance of 99.8percent, the finish of more than or equal to 60-40, the laser wavelength of 1.06mu m and the doping concentration error of + / -0.05 percent.

The present invention discloses a processing method for a strip Fresnel lens. The method comprises the following steps: plasticizing resin; adding the plasticized material into a calender to carry out calendering into sheets; rolling the calendered sheets by a Fresnel insection roller and a smooth roller to press out Fresnel insection, and synchronously cooling; eliminate internal stress; after cooling, relaxed placing the Fresnel hard sheets to eliminate the internal stress; cutting and packaging. According to the present invention, the heating roller, the treatments of heating and calendaring are adopted, the Fresnel insection roller is adopted to carry out extruding and forming, the threading method is adopted to cool and shape the front side and the back side of the hardware; the process of the invention has characteristics of simpleness, rapidness and high yield, wherein the yield of the present invention is increased by thousands of times compared to the yield produced by the original molding method; the cost is substantially reduced, wherein the cost can be reduced by hundreds of times; the quality precision, ie., the cusp angle of the refraction angle of the Fresnel lens, is ensured, such that the case of the scattering is not generated; the finish can achieve more than 10.

The invention relates to an optical measurement device (10) for measuring an optical appearance of a surface (16) of a sample (18), in particular the surface (16) of a human skin, comprising a measuring head (30) which can be brought into contact with the surface (16) of the sample (18), the measuring head (30) comprising: an illumination device (12, 46) for illuminating the surface (16) with an illumination beam (14); a detection device (23) for detecting a response beam (20), wherein the response beam (20) is the response of the sample (18) to the illumination beam (14). The detection device (23) comprises a screen (22, 52) for intercepting the response beam (20), wherein the screen (22, 52) extends approximately a quarter hemisphere in order to realize measuring head (30) with a small contact area with the surface.

The invention discloses a method for designing a surface plasmon polariton wave absorber, which comprises the following steps of: generating an SPP signal by adopting a Vivaldi gradually-changed slot, coupling the SPP signal to a comb-shaped intrinsic structure through a coplanar waveguide (CPW) feed structure, transmitting the SPP signal along the comb-shaped intrinsic structure, and receiving the SPP signal at a receiving end by adopting the Vivaldi gradually-changed slot. Indium tin oxide (ITO) is adopted as a basic structure of an SPP absorption unit, the wave vector of the SPP absorption unit is matched with the wave vector of an SPP signal by regulating and controlling dispersion characteristics and impedance characteristics, and the SPP absorption unit is matched with the impedance of the SPP signal; The invention is used for absorbing SPP signals in the transmission process. A broadband SPP signal is generated by adopting an SPP excitation and receiver, an SPP wave-absorbing structure is designed by adopting an indium tin oxide (ITO) structural unit, the transmission wave vector of the wave-absorbing structure is improved by adjusting the geometric dimension of ITO, so that the excited SPP signal can be stably transmitted without scattering, wave impedance matching is realized by changing the conductivity parameter of the ITO structure, and the SPP wave-absorbing structure can be applied to the field of microwave sensing. Therefore, perfect absorption of the SPP signal is realized.

Provided is a solid electrolytic capacitor and manufacturing method thereof which facilitates an assembly work with simple construction to lead to a reduction of cost, realizes excellent equivalent series resistance characteristics and makes a thin configuration possible. With the solid electrolytic capacitor of the present invention, a cathode lead frame has a connecting member to connect integrally with a cathode member of a capacitor element stack body on the side surface of a capacitor element extending in the thickness direction thereof. Capacitor elements, each provided with a through hole on an anode member, are stacked on top of each other in layers and connections between capacitor elements are achieved by disposing an anode lead frame between layers. Accordingly, when a plurality of anode members are joined to the anode lead frame via a through hole provided on respective anode members of capacitor elements, stabilized welding work is allowed to be performed without any of molten aluminum foil to be released outside.

The present invention relates to the technical field of molecular biology, in particular to an adjustable luciferase segmented fusion protein, its preparation method and application. The fusion protein includes luciferase N-terminal protein, flexible peptide segment 1, MBP protein, Active valve, flexible peptide segment 2 and luciferase C-terminal protein; wherein, the luciferase N-terminal protein and luciferase C-terminal protein together form luciferase; the active valve is a section of 4-8 hydrophobic short Peptide Amino Acids. Through the short peptide chain amino acid sequence as the "active valve" and the specific cleavage enzyme as the "valve key", a new type of fluorescent complementary protein switching mode is realized, which can be used to evaluate the dynamic interaction of other proteins such as ligands Binding to a substrate, interactions that create new binding sites, protein-protein interactions that deactivate proteins, protein-protein interactions that alter the substrate specificity of a protein.

The invention discloses a levo-oxiracetam freeze-dried powder for injection. The freeze-dried powder contains the following raw and auxiliary materials by mass: 1 part of levo-oxiracetam, 0.4-0.6 partof methionine, 0.5-0.9 part of lactose, 0.2-0.4 part of triethanolamine, 0.01-0.02 part of Tween 80, and 0.01-0.03 part of phenol. The invention utilizes specific excipient combination and freeze-drying curve, the sublimation temperature of a secondary drying stage is raised, the preparation production cycle is shortened, powder scattering phenomenon does not occur, the content and other indicators all meet the requirements, the product has good clarity that is lower than a 0.5# standard turbidity solution, also has strong antibacterial properties, and is qualified in aseptic inspection.

The present invention relates to a car headlight comprising a light emitting unit for producing the function of a main light, the light emitting unit is composed of a light source and a lens, the lens projects the light emitted by the light source distributed as a main light in the state where the light emitting unit is installed in the car into the area in front of the car as the main light distribution; and include an auxiliary lighting unit designed to produce an auxiliary lighting distribution, the auxiliary lighting unit is arranged so that the lighting of the auxiliary lighting unit during the operation of the auxiliary lighting unit or It is said that the area emitting light is arranged optically close to the lens of the light emitting unit of the main light. According to the invention, the lens of the main light emitting unit has an antireflection coating at least partially on its light incident surface, and / or the lens of the main light emitting unit has an antireflective coating at least partially on its light exit surface, and The auxiliary lighting unit is switched on during lamp operation.

An optical recording material and methods of making such material is provided. The material comprises of a dewar benzene monomer, with at least two cross-linkable groups, a sensitizer, a cross-linker, and an initiator. The material does not require a binder or a co-sensitizer. The material can be fabricated by an exceedingly easy technique that offers high photosensitivity, high diffraction efficiency, millimeter thickness, and high dynamic range.