56results about How to "Large dispersion" patented technology

An imaginary object plane is set in front of an imaging device body (plane setting step). A part of optical conditions of optical lenses are changed as variables, and positions of points (pixel observation points) on the imaginary object plane where lights coming from pixels of a solid-state imaging element and back-projected through the optical lenses are calculated (pixel observation point calculating step). The dispersion in position of the calculated pixel observation points is evaluated (evaluating step). Finally, a set of values of the variables giving maximum evaluated dispersion of the calculated pixel observation points is determined as optimum optical condition of the optical lenses (condition determining step). This reduces the number of pixels which image the same portions of the target object, making it possible to reduce portions of the same image information in multiple unit images, and to stably obtain a reconstructed image having a high definition.

Ultrashort pulse laser processing bores, welds or cuts objects (work pieces) by converging ultrashort laser pulses by a lens on the objects (work pieces) positioned at the focus and heating small spots or narrow lines on the objects (work pieces). Shortage of a focal depth of the lens prevents the ultrashort pulse laser processing from positioning the object (a work piece) and forming a deep, constant-diameter cylindrical hole. Z-parameter is defined to be Z=2fcΔt / Δi2, where Δt is a FWHM pulse width of the ultrashort pulse laser, Δi is a FWHM beam diameter of the ultrashort pulse, f is a focal length of the lens and c is the light velocity in vacuum. Selection of an optical system including a diffraction-type lens which gives the Z-parameter less than 1 (Z<1) prolongs the focal depth. Expansion of the focal depth facilitates the positioning of objects (work pieces) and enables the ultrashort pulse laser apparatus to bore a deep, constant-diameter cylindrical hole.

Described is an optical fiber system for delivering ultrashort pulses with minimal distortions due to nonlinearity. The system is based on delivering the optical pulses in a higher order mode (HOM) of a few-moded fiber. The fiber is designed so that the dispersion for the HOM is very large. This results in a dispersion length LD for the delivery fiber that is exceptionally small, preferably less than the non-linear length LNL. Under these conditions the system may be designed so the optical pulses experience minimum non-linear impairment, and short pulse / high peak power levels are reproduced at the output of the delivery fiber.

Compact and transportable equipment that can be used for fracturing operations on gas or oil fields, includes, successively, a silo for storing polymer in powder form, a feed hopper of a polymer metering device, a device for metering out the powder polymer, a device for dispersing and grinding the polymer, and at least two volumetric pumps enabling the injection and metering of the polymer solution obtained in the mixer used for supplying at least one high-pressure fracturing pump.

A method for sizing a surface cross-linked water-absorbent resin removed coarse particles and fine powder is provided. Sized resin particles are obtained by classifying water-absorbent resin particles to remove an aggregates and fine powder in the particles, disintegrating the obtained aggregates and classifying the products of the disintegration to remove coarse particles and fine powder contained in the products.

This invention relates to a method for improving the seismic resolution in the field of petroleum exploration and development. The major problems with regard to the present low vertical seismic resolution, and the thin layer, which is recognized by the seismic data administered with difficult, may be resolved according to the present invention. This method essentially comprises the following steps of: (a) ensuring the depth and the velocity of the low-velocity layer and the high-velocity layer and the characteristic of the frequency spectrum of the seismic wave at the near-surface using the borehole-micro-logging method; (b) separating the virtual reflected wave from the seismic record in the high-velocity layer using the processing method of the vertical seismic section, and improving the SNR of the seismic record of the direct path wave at the high-velocity layer using the stack processing method of porches of the vertical seismic section; (c) evaluating the de-convolution operator of the near-surface by the convolution math-physics type equation; (d) evaluating the seismic record with high resolution by the de-convolution math-physics type equation; (e) providing the band-pass filtering and geologic interpretation to the seismic record with high resolution. Using the method of the present invention, the apparent dominant frequency may be reached to 200 Hz and higher, the vertical seismic resolution is improved, and the problem that it is difficult to recognize the thin layer by the present seismic exploration is resolved.

A portable sound and vibration transmission device, compatible with common audio producing means, designed to enhance the relaxation experienced by a massage therapy client through the use of an upward facing subwoofer and distal cylinders containing speaker drivers positioned to create a surround sound effect.

An optical glass contains glass constituents by wt % as follows; P2O5: 20 to 30%, B2O3: 0.1 to 10%, Nb2O5: 25 to 45%, WO3: 9 to 25%, Bi2O3; 0.1 to 10%, BaO: 3 to 15%, Li2O: 4 to 5.5%, Na2O: 0 to 2%, K2O: 0 to 2%, Na2O+K2O: 0 to 2%, Li2O+Na2O+K2O: 4 to 6%, Al2O3: 0 to 3%, CaO: 0 to 5%, SrO: 0 to 5%, ZnO: 0 to 5%, Ta2O5: 0 to 5%, TiO2: 0 to 5%

Compact and transportable equipment that can be used for fracturing operations on gas or oil fields, includes, successively, a silo for storing polymer in powder form, a feed hopper of a polymer metering device, a device for metering out the powder polymer, a device for dispersing and grinding the polymer, and at least two volumetric pumps enabling the injection and metering of the polymer solution obtained in the mixer used for supplying at least one high-pressure fracturing pump.

The invention discloses a 3D printing aramid fiber aerogel, and a preparation method and an application thereof. The preparation method comprises the following steps: uniformly mixing aramid nanofibers and a solvent to form an aramid nanofiber dispersion; and carrying out sol-gel conversion and drying treatment through a freezing-direct writing forming technology to obtain the 3D printing aramid fiber aerogel. Surface hydrophobic modification and filling modification are respectively carried out on the 3D printing aramid aerogel to respectively obtain a hydrophobic material, a photochromic material and a temperature response material. The preparation method of the 3D printing aramid fiber aerogel has the advantages of wide dispersity, low energy consumption, quick low-temperature response,high printing precision, simple process and short flow, and the obtained 3D aramid aerogel has the advantages of ultralow density, good mechanical properties and structural designability, can be applied to the fields of heat preservation and insulation, catalysis, separation / adsorption, sensing, soft robots and the like, and greatly expands the application range of 3D printing and aramid aerogel.

The invention provides an optical phase device with its application method and system. The optical phase device consists of a transparent dielectric substrate, a multilayer stack of dielectrics and a buffer layer. The refractive index of the transparent dielectric substrate, the multilayer stack of dielectrics and the buffer layer are all larger than that of the external medium. For the wavelength of the incident beam, the optical phase device has a phase variation in the angular range [α, β] and the critical angle for total reflection on the interface between the buffer layer and the external medium adjacent to the buffer layer is θ, θ<β. Our invention of the optical device has both low loss and large phase variation, which leads to a large Goos-Hanchen shift. As a dispersion compensation component, it can produce bigger and tunable dispersion, and different dispersion compensations can be got by adjusting the operating angle or parameters in the structure.

A first problem is to reduce an enormous uplink throughput of a base station that feedback information needs so as to improve an uplink throughput of useful user data. A second problem is to carry out a frequency segment assignment to guarantee a number of communication times and a communication quality to every terminal apparatus so as to increase a downlink throughput. The second problem is solved together. As means to give the number of communication times per each terminal apparatus, means to estimate an expected value of the number of communication times per each terminal apparatus, and means to assign the terminal apparatus per each frequency segment are arranged in the base station apparatus. To increase the communication quality, necessary means in each terminal apparatus are: means to measure statistics values of a communication capacity with regard to all the frequency segments; means to feed back the statistics values to the base station apparatus; means to calculate the occurrence probability of a high communication capacity based on the communication capacity statistics values per each frequency segment of all the terminal apparatuses; and means to assign the terminal apparatus per each frequency segment. To fuse the means to give the number of communication times and the means to give the communication quality, the means to assign the terminal apparatus per each frequency segment that the base station apparatus has assigns a frequency segment that has a little number of competitors sharing a same segment, and has high average and dispersion of the communication capacity to each terminal apparatus.

A potential of a data signal line S during a scanning period is charged to a substantially intermediate potential of a data signal at a corresponding frame. Thus, extremely large dispersion does not occur in a potential of each pixel capacitor with respect to a potential of the data signal line S, so that it is possible to restrict dispersion of a leak current flowing via an active element of each pixel. Thus, potential variation of a pixel PIX is reduced, so that it is possible to improve display quality during a non-scanning period. That is, in an active-matrix-type liquid crystal display, when a frame frequency is reduced by setting the non-scanning period to be sufficiently larger than a scanning period while a standby image is being displayed so as to realize low power consumption, the display quality is improved.

A method is provided for rendering a color image with a plurality of separations with a multi-level successive-filling halftoning process using a single screen for a plurality of separations. For a separation to be processed, first, from the possible multiple levels for the separation, the set of levels that would be used and the number of dots corresponding to the different levels are decided. These decisions are based on the input level for the separation and input levels for the prior process separations. The location of the dots to be printed for the different levels for the separation is then decided by using the halftone screen, while simultaneously taking into account the placement of printed dots for the prior separations. The selection is done so as to best disperse dots and minimize overlap.

The invention discloses a preparation method of a pH-responsive graphene / polymer nanometer hybrid material. The preparation method comprises the following steps: under the protection of inert gas of argon or nitrogen, carrying out an esterification reaction by using a reversible addition-breakage chain transfer polymerization chain transfer agent of hydroxyl and terminal carboxyl on the surface of graphene oxide to obtain a macromolecular chain transfer agent for reversible addition-breakage chain transfer polymerization; and then, carrying out reversible addition-breakage chain transfer polymerization under initiation of azodiisobutyronitrile to obtain the pH-responsive grapheme / polymethylacrylic acid-N,N-lignocaine ethyl ester nanometer hybrid material. The graphene oxide / polymer nanometer hybrid material not only ensures that the dispersibility of graphene in water is greatly improved but also has pH responsiveness, and can be widely applied to the fields of drug controlled release carriers, biosensors, intelligent nanometer materials and the like. The preparation method is simple and easy, and industrial production of materials can be realized, so that the method has good popularization and application values.

A light emitting module including a lens is provided. The light emitting module includes a light emitting diode chip, and a lens. The lens according to an embodiment includes a lower surface having a concave portion, and an upper surface from which light incident on the concave portion is emitted. The upper surface of the lens includes a concave surface positioned in a central axis thereof. The concave portion of the lower surface includes at least one of a surface perpendicular to the central axis and a downwardly convex surface. At least one of the surface perpendicular to the central axis and the downwardly convex surface is positioned in a region narrower than an entrance region of the concave portion.

Anti-personnel tank fired ammunition designed for attacking personnel at various ranges includes a hollow base member adapted with an electric primer and a plastic or aluminum canister containing a payload at one end thereof. In operation, the hollow cartridge is loaded with a solid propellant. The electric primer which is centrally located in the solid propellant is fired and provides a flash together with the gasses needed to ignite the propellant. The burning propellant then provides the gasses needed to force the canister from the gun tube in which the ammunition is positioned.

There is provided a disposable beverage container holder. A disposable beverage container holder formed by cutting and welding a synthetic resin film folded in half, including: a beverage container receiving portion formed in a cylindrical shape by joining the synthetic resin film by welding; and a handle portion including the folded part and formed continuously from one of two opposing positions on an upper end of the cylindrical receiving portion to the other, wherein the synthetic resin film is cut so that an upper edge of the receiving portion forms an obtuse angle at an upper end of the joint part.

An etching apparatus of the present invention comprises a reaction chamber, a lower electrode placed on the bottom surface of the reaction chamber, an upper electrode placed at the ceiling of the reaction chamber to face the lower electrode, and a focus ring placed on the lower electrode and having a cavity for holding a to-be-processed substrate. The lower surface of the upper electrode is provided, at its middle part, with a recess having a smaller inside diameter than the diameter of the to-be-processed substrate. Thus, in the generation of plasma, the amount of further incident radicals can be reduced in a middle part of the to-be-processed substrate. Therefore, a hole or the like located in the middle part of the to-be-processed substrate can be formed to have a desired shape without having a tapered shape.

The invention discloses a specific material of concrete polypropylene fiber, which comprises the following parts: 100% polypropylene, 2-10% modifier, 0.01-0.2% anti-oxidant, 0.03-3% optical stabilizer. The fiber possesses permanent affinity with concrete base, which displays excellent dispersity to avoid contraction greatly.

The invention relates to an automatic zooming thin-film liquid lens based on temperature control and a preparation method. An optical thin-film structure is located between a circular hole structure and a micro-channel, a transparent glass sheet is located between the micro-channel and a semiconductor chilling plate, and a heat sink structure is arranged at the lower end of the semiconductor chilling plate; an air cavity is formed in the micro-channel and is communicated with an air outlet in the side wall of the micro-channel; and an optical liquid cavity is formed between the optical thin-film structure and the transparent glass sheet, and a micro-channel structure is arranged between the air cavity and the optical liquid cavity and is communicated with a liquid inlet in the side wall ofthe micro-channel. The precise focusing function of the thin-film liquid lens is achieved, the volume of air is changed by controlling the temperature of the air in the sealed space, so that the thinfilm expands upwards or sinks inwards, and finally the convergence or divergence effect on light rays is achieved. The liquid lens has the functions of a concave lens and a convex lens at the same time, and the focal length is continuously adjustable.

The invention provides an optical phase device with its application method and system. The optical phase device consists of a transparent dielectric substrate, a multilayer stack of dielectrics and a buffer layer. The refractive index of the transparent dielectric substrate, the multilayer stack of dielectrics and the buffer layer are all larger than that of the external medium. For the wavelength of the incident beam, the optical phase device has a phase variation in the angular range [α, β] and the critical angle for total reflection on the interface between the buffer layer and the external medium adjacent to the buffer layer is γ, γ>β. Our invention of the optical device has both low loss and large phase variation, which leads to a large Goos-Hanchen shift. As a dispersion compensation component, it can produce bigger and tunable dispersion, and different dispersion compensations can be got by adjusting the operating angle or parameters in the structure.

Ultrashort pulse laser processing bores, welds or cuts objects (work pieces) by converging ultrashort laser pulses by a lens on the objects (work pieces) positioned at the focus and heating small spots or narrow lines on the objects (work pieces). Shortage of a focal depth of the lens prevents the ultrashort pulse laser processing from positioning the object (a work piece) and forming a deep, constant-diameter cylindrical hole. Z-parameter is defined to be Z=2fcΔt / Δi2, where Δt is a FWHM pulse width of the ultrashort pulse laser, Δi is a FWHM beam diameter of the ultrashort pulse, f is a focal length of the lens and c is the light velocity in vacuum. Selection of an optical system including a diffraction-type lens which gives the Z-parameter less than 1 (Z<1) prolongs the focal depth. Expansion of the focal depth facilitates the positioning of objects (work pieces) and enables the ultrashort pulse laser apparatus to bore a deep, constant-diameter cylindrical hole.

The invention discloses an efficient dryer, and belongs to the mechanical technical field. The efficient dryer comprises a combustion chamber; a combustor is arranged on the left side wall of the combustion chamber; a heat insulating layer is arranged on each of the top and the bottom of an inner cavity of the combustion chamber; and a drying box is arranged at the right end of the combustion chamber. The efficient dryer is reasonable in setting, is safe and practical; the combustion chamber and the drying box are isolated, so that high-temperature flames are in a combustion cavity all the time, and only hot air enters the drying box. Poisonous high-risk pollutants such as dioxin which can be possibly generated as a result of direct contact of high-temperature flames and materials are avoided, and the temperature in the drying box is more uniform; a dust collecting device can be adopted to filter harmful gas in the drying box, so that the exhausted gas is guaranteed to reach standards, and environmental pollution is avoided; and plough-shaped stirring blades have turnover effect while materials are clustered, have cutting effect during a material sticking stage, and further have up-down stirring effect while having the turnover effect and the cutting effect.

An optically-pumped mode-locked fiber ring laser for optical clock recovery of multiple wavelength division multiplexed optical signals actively mode-locks a plurality of outputs of the laser as a plurality of recovered clocks for a plurality of the multiple wavelength division multiplexed optical signals. The laser cavity has a cavity length corresponding to an integer multiple of bit periods of at least one of the multiplexed optical signals for receiving a pre-amplified version of the plurality of wavelength division multiplexed optical signals to provide gain modulation through a phase-insensitive parametric amplification and recirculating a proportion of the output from the laser cavity back through the laser cavity for spatially mode-locking the output of the laser cavity as a recovered clock whereby the recovered optical clock each having a periodic train of optical pulses with a repetition rate corresponding to the clock rate of the corresponding multiplexed optical signal is generated by mode-locking of the optically-pumped laser produced by a spatial modulation of the phase-insensitive parametric gain produced by the pulsed nature of the wavelength division multiplexed optical signals. A nonlinear gain medium disposed in the cavity has a sufficiently large dispersion at all of the wavelengths corresponding to the multiple wavelength multiplexed optical signals for minimizing four-wave mixing crosstalk among the multiple wavelength multiplexed optical signals, among the recovered clocks, and between the plurality of multiple wavelength multiplexed optical signals and the recovered clocks. The gain medium is pumped by the plurality of pre-amplified multiplexed optical signals to provide efficient gain modulation through the phase-insensitive parametric amplification at a plurality of narrow wavelength bands, each of the plurality of narrow wavelength bands immediately adjacent to a wavelength of a corresponding optical signal and each of the plurality of narrow wavelength bands including a corresponding recovered optical clock wavelength, and each of the corresponding optical signals copropagating in the laser cavity through the nonlinear gain medium with the recovered optical clocks. A parametric optical amplifier or a Raman amplifier having an inhomogenously broadened gain amplifies the plurality of recovered clocks for compensating a portion of the cavity loss at all wavelengths of the plurality of recovered clocks. A wavelength selector passes the light at the plurality of wavelengths of the recovered clocks for recirculation in the laser cavity and preventing the light from the multiple wavelength division multiplexed optical signals and a plurality of idler waves generated by four wave mixing between the multiple wavelength division multiplexed optical signals and recovered optical clocks from recirculating in the laser cavity.

The invention discloses a prism spectrograph comprising an incident aperture used for importing composite wavelength light emitted by an external light source and transmitting same to a collimating lens; the collimating lens is used for reflecting the composite wavelength light transmitted by the incident aperture, and collimating and irradiating the light to a prism group; the prism group comprises many prisms, is used for dispersing the composite wavelength light for many times so as to form dispersion light, and transmitting the dispersion light to a focusing lens; the focusing lens is used for gathering the dispersion light and transmitting same to a light sensor; the light sensor is used for converting the dispersion light into an electric signal and sending same to an electric signal processing device; the electric signal processing device is used for parsing processing and / or transmitting the electric signals. The prism spectrograph uses many prisms of the prism group to realize the light large dispersion degree, so optical path and reflection surface can be smartly matched, thus ensuring the degree of dispersion, obviously improving the luminous energy utilization rate, and reducing the volume.