1341 results about "Large aperture" patented technology

A rectenna structure comprising a flexible, dielectric sheet of material; a plurality of metallic lenslets disposed on the sheet of material; and a plurality of diodes disposed on the sheet of material, each diode in said plurality of diodes being arranged at a focus of a corresponding one of said plurality of metallic lenslets.

The invention discloses a hydrotreating guard catalyst for residual oil and application thereof. The catalyst has the advantages of large pore volume, large aperture, high porosity, rational pore distribution, larger external orifice, high pore canal penetrability and over 36 percent of 1,000nm pore canals, and is particularly applied to a hydrotreating method of a residual oil fixed bed to ensure that precipitated metals are uniformly deposited on the whole catalyst bed and impurities, namely vanadium and calcium, can be deposited inside the pore canals so as to improve the utilization ratio of pores and maintain long-period running.

The invention relates to a device for detecting a surface shape of an optical aspheric surface by a sub-aperture stitching interferometer, which comprises an interferometer, a transmission sphere, an adjusting mechanism, a numerical control device and a computer, wherein parallel light emitted by the interferometer is changed into a standard spherical wave through the transmission sphere; the computer controls the action of the adjusting mechanism by the numerical control device to adjust the relative position of the interferometer and an aspheric surface to be detected so that the standard spherical wave is incided to each sub-aperture of the detected optical aspheric surface sequentially and returns to the interferometer; and the computer extracts phase distribution data of each sub-aperture measured by the interferometer for analysis and processing, and the error distribution of the surface shape of a full aperture of the detected optical aspheric surface is obtained by a stitching algorithm. The device broadens horizontal and vertical dynamic range tested by the interferometer, can detect surface shapes of large-aperture concave and convex aspheric surfaces and an off-axis aspheric surface in high resolution and high precision without other auxiliary optical elements, and has low testing cost and short construction period.

The invention discloses a capacitance-type embedded touch screen, a driving method thereof and a display device. A touch sensing electrode extending along the line direction of pixel units is arranged on a color film substrate; on a TFT (Thin Film Transistor) array substrate, a double grid structure is adopted, i.e., two grid signal lines are arranged between the adjacent pixel units, and every two adjacent rows of pixel units form a group of pixel unit rows and share a data signal line between the two rows of pixel units, thus saving the position of part of data signal lines. Therefore, touch driving electrodes for realizing a touch function can be arranged on the saved positions of the grid signal lines, i.e., the touch driving electrodes are arranged at clearances between adjacent pixel units, so that not only can the precision of required by touch be ensured, but also less aperture area of the pixel units is occupied, and the relatively large aperture ratio of the touch screen can be ensured.

An automatic celestial navigation system for navigating both night and day by observation of K-band or H-band infrared light from multiple stars. In a first set of preferred embodiments three relatively large aperture telescopes are rigidly mounted on a movable platform such as a ship or airplane with each telescope being directed at a substantially different portion of sky. Embodiments in this first set tend to be relatively large and heavy, such as about one cubic meter and about 60 pounds. In a second set of preferred embodiments one or more smaller aperture telescopes are pivotably mounted on a movable platform such as a ship, airplane or missile so that the telescope or telescopes can be pivoted to point toward specific regions of the sky. Embodiments of this second set are mechanically more complicated than those of the first set, but are much smaller and lighter and are especially useful for guidance of aircraft and missiles. Telescope optics focus (on to a pixel array of a sensor) H-band or K-band light from one or more stars in the field of view of each telescope. Each system also includes an inclinometer, an accurate timing device and a computer processor having access to catalogued infrared star charts. The processor for each system is programmed with special algorithms to use image data from the infrared sensors, inclination information from the inclinometer, time information from the timing device and the catalogued star charts information to determine positions of the platform. Direction information from two stars is needed for locating the platform with respect to the celestial sphere. The computer is also preferably programmed to use this celestial position information to calculate latitude and longitude which may be displayed on a display device such as a monitor or used by a guidance control system. These embodiments are jam proof and insensitive to radio frequency interference. These systems provide efficient alternatives to GPS when GPS is unavailable and can be used for periodic augmentation of inertial navigation systems.

A medical ultrasound imaging pulse transmission method transmits at least three pulses, including at least two pulses of different amplitude and at least two pulses of differing phase. The larger-amplitude pulse is transmitted with a larger aperture and the smaller-amplitude pulses are transmitted with respective smaller subapertures. The subapertures are arranged such that the sum of the subapertures used for the smaller-amplitude pulses is equal to the aperture used for the larger-amplitude pulse. In this way, pulses of differing amplitudes are obtained without varying the power level of individual transducer elements, and precise control over pulse amplitude is provided.

A MALDI/LDI source includes an ion collection device, e.g., a skimmer, orifice, mass analyzer, ion transfer optics and/or ion guide, configured for use with a short focal length lens with a large aperture. In some embodiments, the ion collection device includes an outer edge that can be disposed approximately parallel to a beam envelope between a lens and a focal point positioned at a MALDI/LDI sample. This configuration of the outer edge allows the ion collection device to be placed in close proximity to the focal point. This placement results in favorable collection efficiencies of laser desorbed analyte from the MALDI/LDI sample.

A dual-mode, capable of imaging and ablation, ultrasound array integrated in a catheter is provided for minimally invasive treatment of arrhythmias. The catheter array is small enough for insertion through a peripheral vein and is longitudinally integrated with the catheter to have a side-view for tissue imaging and ablation. A high length/width array ratio creates a large aperture necessary for high power ablation densities. A catheter stabilization device maintains a distance between the catheter array and the wall of a heart or vein. Visualization of anatomy and imaging of ablated tissue provides a guide for placing the lesion and assists in achieving a pattern of ablated tissue. The catheter is advanced to another area by catheter rotation and/or array steering or focusing. Gating the imaging and ablation processes to a heart cycle allows for accounting and compensation of heart motion and enables automation of an arrhythmia treatment.

A junction box assembly for weather-resistant installations is disclosed including a junction box (100) and an extension ring (116, 216) adapted to attach with an component such as an alarm signaling unit (118, 218). The junction box assembly enables a relatively uniform compressive force about the periphery of the alarm signaling unit, such that a good, weather resistant seal is produced between a sealing surface (159, 259) on the alarm signaling unit and a mounting surface (161). In an embodiment of the assembly the extension ring (216) includes a flange (244) that attaches to the junction box, an large aperture (247) providing access to the interior of the junction box, and a mounting plate (266) including a threaded aperture (254) that is centrally located to align with a mounting aperture (242) in the alarm signaling unit. A gasket (219) may be provided between the signaling unit and the sealing surface.

The present invention relates to the optical lens field, and discloses a camera shooting optical lens. The lens comprises from an object side to an image side in order: an aperture, a first lens with positive refraction power, a second lens with negative refraction power, a third lens with positive refraction power, a fourth lens with negative refraction power, a fifth lens with positive refraction power and a sixth lens with negative refraction power. The camera shooting optical lens satisfies the relation as follows: 0.70<f1/f<0.80, 2.0<f2/f< 1.8, 1.9<f3/f<2.1, -2.6<f4/f<-2.2, 0.8<f5/f<1, -0.7< f6/f <-0.5 and 1.9<f3/f5<2.2. The camera shooting optical lens can satisfy the large aperture design requirement while shortening the optical total length and has good sensitivity appearance.

The invention relates to an optical lens which sequentially comprises a front lens group with positive focal power, a diaphragm element and a rear lens group with positive focal power from the object space to the image space. The front lens group sequentially comprises a first lens and a second lens from the object space to the image space. The first lens is a biconcave lens with negative focal power. The second lens is a biconvex lens with positive focal power. The rear lens group sequentially comprises a third lens, a fourth lens and a fifth lens from the object space to the image space. A gluing lens is formed by the third lens and the fourth lens. The fifth lens is an aspheric surface lens with positive focal power, and two concave faces of the fifth lens are in the same-direction crescent shape. According to the optical lens, high pixels, small deformation and large apertures can be achieved under the condition that the requirements for low cost and miniaturization are met, a perfect image can still be kept within the temperature range of -40 DEG C to 85 DEG C, and the optical lens is particularly suitable for monitors and vehicle-mounted camera systems which work in the day and at night or under a poor illumination condition.

An optical image capturing system, from an object side to an image side, comprises a first, second, third, fourth, fifth, sixth, and seventh lens elements. At least one of the first through sixth lens elements has positive refractive power. The seventh lens has negative refractive power. Both of the image-side surface and the object-side surface of the seventh lens element are aspheric and at least one of the two surfaces has inflection points. The second through seventh lens elements of the optical image capturing system have refractive power. When specific conditions are satisfied, the optical image capturing can have a large aperture value and a better optical path adjusting ability, so as to improve imaging quality.

An automatic celestial navigation system for navigating both night and day by observation of K-band or H-band infrared light from multiple stars. In a first set of preferred embodiments three relatively large aperture telescopes are rigidly mounted on a movable platform such as a ship or airplane with each telescope being directed at a substantially different portion of sky. Embodiments in this first set tend to be relatively large and heavy, such as about one cubic meter and about 60 pounds. In a second set of preferred embodiments one or more smaller aperture telescopes are pivotably mounted on a movable platform such as a ship, airplane or missile so that the telescope or telescopes can be pivoted to point toward specific regions of the sky. Embodiments of this second set are mechanically more complicated than those of the first set, but are much smaller and lighter and are especially useful for guidance of aircraft and missiles. Telescope optics focus (on to a pixel array of a sensor) H-band or K-band light from one or more stars in the field of view of each telescope. Each system also includes a GPS sensor and a computer processor having access to catalogued infrared star charts. The processor for each system is programmed with special algorithms to use image data from the infrared sensors, position and timing information from the GPS sensor, and the catalogued star charts information to determine orientation (attitude) of the platform. Direction information from two stars is needed for locating the platform with respect to the celestial sphere. The computer is also preferably programmed to calculate further information which may be used by a guidance control system. These systems provide efficient alternatives to inertial navigation systems when such systems are too expensive and can be used for periodic augmentation and calibration of inertial navigation systems.

A rectenna structure comprising a flexible, dielectric sheet of material; a plurality of metallic lenslets disposed on the sheet of material; and a plurality of diodes disposed on the sheet of material, each diode in said plurality of diodes being arranged at a focus of a corresponding one of said plurality of metallic lenslets.

The invention provides a preparation method of porous graphene. The method comprises the steps of: heating a carbon material and an activator; obtaining the porous graphene after reaction, wherein the carbon material is modified graphene or graphene, and the activator is a transitional metal or a transitional metal compound; in the process of preparing the porous graphene, heating the graphene or the modified graphene and the activator: the transitional metal or the transitional metal compound to form a transitional metal carbide; further decomposing the transitional metal carbide into carbon and transitional metal to obtain the transitional metal for continuously reacting with the graphene; and circulating in this way to finally obtain the porous graphene. Compared with the prior art, as the transitional metal and the carbon material are reacted circularly, the porous graphene with larger aperture range can be obtained. Experimental result shows that the diameter of the porous graphene prepared by the invention is 1-100nm.

Power scalable, rectangular, multi-mode, self-imaging, waveguide technologies are used with various combination of large aperture configurations, 20, 50, 80, 322, 324, 326, 328, 330, 332, 334, 336, 338, Gaussian 360 and super-Gaussian 350 beam profiles, thermal management configurations 100, flared 240 and tapered 161 waveguide shapes, axial or zig-zag light propagation paths, diffractive wall couplers 304, 306, 308, 310, 312, 314, 316, 318, 320 and phase controller 200, flexibility 210, phased arrays 450, 490, beam combiners 530, 530′, and separators 344, 430, and other features to generate, transport, and deliver high power laser beams.

A tongue hygiene device to be used with a mildly abrasive cleanser, the tongue hygiene device having a generally elongate handle section and a generally disk-shaped cleansing section. The handle section is ergonomically designed to allow the user to effectively and comfortably hold the tongue hygiene device in proper cleansing alignment with the tongue. The cleansing section includes three generally parallel, circular patterns of medium-length bristles of medium stiffness, protruding from a generally disk-shaped cleansing head, the cleansing head having a top face, and a bottom face from which the bristles protrude, and a large aperture extending between the centers of the bottom and top faces which is surrounded by the bristles on the bottom face. The bristles allow the tongue hygiene device to cleanse the tongue by brushing bacteria and food buildup from the tongue using a mildly abrasive cleanser. The aperture allows air and the lather formed by brushing with a cleanser to pass through the head element, thereby increasing the lather and facilitating the passage of bacteria and food buildup away from the surface of the tongue, and provides a conduit for the passage of air and water through the head element during cleaning of the tongue hygiene device, expediting and simplifying cleaning of the tongue hygiene device and hastening drying of the bristles.

The invention relates to a multi-stage multi-aperture ceramic dielectric gas fuel inflamer which includes an inflamer shell, a dust-removing wire netting or a metal brush, an air pipeline, a premixing chamber and a fuel gas pipeline. The invention is mainly characterized in that the inflamer shell is divided into an upper part and a lower part with a multi-aperture plate as a boundary. The inner part of the empty cavity at the upper part of the inflamer shell is sequentially provided with a ceramic multi-aperture dielectric of the large-aperture area which is arranged above a ceramic multi-aperture dielectric of the small-aperture area and the ceramic multi-aperture dielectric of the small-aperture area is arranged on the multi-aperture plate. The dust-removing wire netting or the metal brush is arranged under the multi-aperture plate and in the inflamer shell. The multi-aperture plate is imbedded into the middle of the upper and lower parts of the inflamer shell. The surrounding of the multi-aperture plate extends to the outside of the inflamer shell. The invention has the advantage that the multi-stage multi-aperture ceramic dielectric gas fuel inflamer has a higher thermal value range, thereby both the gas of a low thermal value or bum gas fuel and the gas of a higher thermal value can be burnt. The multi-aperture plate added in the inflamer has played a good role of radiating and can effectively prevent backfire or explosion.

A 3D glass porous medium model for microscopic oil displacement is provided. The invention mainly solves the problem of the existing rock core model for microscopic oil displacement can not simultaneously assure high simulation degree and 3D visibility during the whole oil displacement process when conducting microscopic oil displacement experiment. The invention is characterized in that the model is formed by tightly bonding of at least three substrates made of glass material, a rock core planar pore channel (5) is respectively etched on the upper surface of a bottom substrate (12) and intermediate substrates (9, 10, 11), a plurality of throat channels (3) passing through the substrate are opened at a plurality of large apertures of the intermediate substrates (9, 10, 11), and a liquid injection channel (1) and a liquid outflow channel (2) are disposed on the model and respectively communicated with the large rock core planar pore channels (5) on the bottom substrate (12) and the first intermediate substrate (9). The invention can perform accurate 3D simulation of the rock core pore and assure high simulation degree during experiment, and the whole process is visible.

The invention discloses a moveable-feeding-mechanism-based ultrasonic flaw detection system for bent steel tubes. The system comprises a moveable ring-shaped feeding mechanism, a set of hydraulic support frame which constitutes a bent tube holding base and two sets of ultrasonic detecting mechanisms for the bent steel tubes. The moveable ring-shaped feeding mechanism comprises a ring-shaped guide rail, internal gears, a feeding pneumatic telescopic link, a drive worm, a drive worm wheel, a drive link, a first electric motor mounting plate, adjusting tracks, a feeding servo motor, two roller mounting plates and two hydraulic support cylinders. The hydraulic support frame comprises a hydraulic cylinder, a hydraulic piston rod and a V-shaped support frame which is arranged on the hydraulic piston rod. Each set of the ultrasonic detecting mechanisms for bent steel tubes comprises a detecting servo motor, an external box body of a slewing mechanism, a drive gear, a gear shaft, a detecting pneumatic telescopic link, a chained ultrasonic probe frame mounting frame and a chained ultrasonic probe frame. According to the system, ultrasonic automatic flaw detection for large-aperture bent steel tubes can be realized, the precision and the efficiency of nondestructive tests for bent steel tubes are effectively improved and the detection labor intensity of workers is alleviated.

An optical image capturing system, from an object side to an image side, comprises 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 a positive refractive power and a convex object-side surface. The second through fifth lens elements has a positive refractive power and the object-side and image-side surfaces of these lens elements are aspheric. The sixth lens element has a negative refractive power and a concave image-side surface. The object-side surface and the image-side surface are aspheric, and at least one of the two surfaces has inflection points. The first through sixth lens elements has a refractive power. When specific conditions are satisfied, the optical image capturing system may has a large aperture value and a better optical path adjusting ability to acquire better imaging quality.

The invention discloses an optical lens group, an imaging device and an electronic device. The optical lens group sequentially includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens from the object side to the image side. The first lens has positive refractive power, and its object-side surface is convex near the optical axis. The second lens has refractive power. The third lens has refractive power. The fourth lens has refractive power. The fifth lens has refractive power, and its image-side surface near the optical axis is concave. The sixth lens has refractive power, its object-side surface near the optical axis is concave, and its object-side surface and image-side surface are both aspherical. The seventh lens has refractive power. The image-side surface near the optical axis is concave, and the image-side surface off-axis includes at least one convex surface. Both the object-side surface and the image-side surface are aspherical. When certain conditions are met, it can have a large aperture, a short overall length and a large viewing angle. The invention also discloses an image taking device and an electronic device with the above-mentioned optical lens group.

The invention discloses a DOA (direction of arrival) estimation method based on a nested minimum redundant array, and mainly solves the problem of low DOA estimation resolution when the number of targets is greater than the number of array elements in the prior art. An implementation process of the method comprises the following steps: 1, giving a total array element number to built a nested minimum redundant array (NMRA), 2, obtaining received data X(t) of the NMRA according to the NMRA, 3, estimating a covariance matrix R<XX> of the NMRA according to the X(t), vectorizing the R<XX>, removing repeated elements, and then obtaining differential synthesis array received data Z<c>, 4, dividing Z<c> into a plurality of sub array received data, calculating a covariance matrix of each sub array received data, performing forward and backward smooth average, and then obtaining rank recovery data covariance matrix R<SS>, and 5, performing eigenvalue decomposition on the R<SS>, and then obtaining a DOA estimation angle. The method has the advantages of the large aperture, the high degree of freedom and good DOA estimation angle measurement performance in the same condition, and can be applied to radar target signal detection or power estimation.

Flowmeter comprising at least two ultrasonic transducers that are mounted on a container which is penetrated by a medium in a certain direction of flow. The ultrasonic transducers alternately transmit and receive ultrasonic test signals in the direction of flow and counter to the direction of flow. The flowmeter further comprises a control/evaluation unit which determines and/or monitors the volume flow of the medium inside the container based on the difference in the travel time of the ultrasonic test signals propagating in the direction of flow and counter to the direction of flow. The ultrasonic transducers are configured such that they transmit and receive ultrasonic test signals or sound fields having a large aperture angle or a great beam expansion.

A method and apparatus of depth of field rendering which simulates larger apertures for images captured at a smaller aperture. The depth of field rendering provides selective simulation of out-of-focus effects which are attainable with cameras having a larger aperture when capturing images at a smaller aperture. A blur function model is created based on the relationship between the blur change and the aperture change. This model is used to determine the blur difference which would arise between two images taken at two different apertures. Then the out-of-focus effect is generated by blurring the image in a rendering process based on the blur difference.

The system images the volume of a turbid medium and detects the contents. The medium can be water or air, or living tissue, or almost any other material which is at least partially light-transmissive. The system includes a light source for producing a series of discrete fan-shaped pulse beams that are substantially uniform in intensity or have been peaked at the edges of the fan to illuminate sections of the medium, a streak tube with a large, thin-slit-shaped photocathode for collecting the maximum amount of light from weak returns, a field-limiting slit disposed in front of the cathode for removing multiply scattered light, a large-aperture optical element for collecting and focusing the reflected portions of the pulse beam on the field-limiting slit and the cathode, and an array of detectors. A volume display of the medium is generated by translating the transmitter and receiver normal to the longitudinal axis of the pulse beam, to illuminate adjacent sections of the medium, and combining the sections to provide a volume display. All, or substantially all, of the light returned from each pulse beam is used. Vehicle motion can be used to provide the scan of the beam. Applications range from foggy sky surveillance at multiple-kilometer scale to location of fractional-millimeter tumors in a human breast.

The invention discloses a light path collimation integrated device and method for a high-power laser device. A transmission grating engraved with references is put near to the small-hole face of a space filter; the transmission grating is irradiated by parallel non-coherent illumination lights produced by a light emitting diode and an illumination collimation lens at a specific angle; a sampling light path is put in a direction of first-stage diffraction light of the transmission grating so as to form a light beam information monitor; the light beam information monitor simultaneously acquiresinformation of a near field and a far field of a light beam; the output of the light beam information monitor is connected to a computer; deviation values of the near field and far field of the lightbeam relative to the respective set positions are determined through an image processing technology; and a corresponding near field adjusting device and a corresponding far field adjusting device areselected according to the respective deviation values so as to adjust light path collimation. The light path collimation integrated device has the characteristics of integration, modularization, simple structure and high precision, and can meet a monitoring requirement of the high-power laser device on large-aperture light beam collimation.

The invention relates to a method for comprehensively measuring reflectivity, which comprises the following steps: dividing continuous incident laser beams into a reference beam and a detection beam, wherein the reference beam is focused on a photoelectric detector for direct detection and the detection beam is injected into an optical resonant cavity; using a cavity ring-down technology to measure an optical element with reflectivity more than 99%, respectively measuring a ring-down time tau 0 of an original optical resonant cavity output signal and a ring-down time tau 1 of the measured optical resonant cavity output signal after an optical element to be measured is added, and calculating the reflectivity R of the optical element to be measured; using the spectrophotometry to measure the reflectivity of the optical element to be measured when the R value is less than 99%; moving away an output cavity mirror; focusing detecting light reflected by a measuring mirror on the photoelectric detector for detecting while recording a light intensity signal ratio of the detection beam to the reference beam; and calibrating to further obtain the reflectivity R of the optical element to be measured. The device for measuring reflectivity can be used for measuring optical elements with any reflectivity and also can be used for realizing the high-resolution two-dimensional imaging of the reflectivity distribution of a large-aperture optical element.

The invention relates to an ultrasonic automatic scanning device for a large-aperture pipeline in a nuclear power plant. The ultrasonic automatic scanning device comprises a mechanical scanning part, an electric control part and a pipeline part, wherein the mechanical scanning part comprises a circumferential guide rail part, a circumferential moving module and an axial moving module; the circumferential guide rail part comprises an annular body and a plurality of supporting legs which are mounted on the inner side of the annular body and are capable of moving along the radial direction of the annular body; the circumferential moving module comprises a circumferential guide rail fixed on the annular body, an arc-shaped fixed plate which is detachably mounted on the circumferential guide rail and is capable of moving along the circumferential guide rail, and a circumferential driving motor which is fixed at one end of the arc-shaped fixed plate and is meshed with the circumferential guide rail; the axial moving module comprises an arc-shaped frame detachably mounted on the arc-shaped fixed plate, a probe disk which is parallel to the arc-shaped fixed plate, can slide in the arc-shaped frame and is used for fixing ultrasonic probes, an axial driving motor fixed on the arc-shaped frame, and a transmission mechanism which is connected with the axial driving motor and is used for driving the probe disk. On one hand, the mechanical scanning part is modularized, so that the occupation space can be effectively reduced, and the mechanical scanning part can conveniently move and be mounted in the narrow space of the nuclear power plant; on the other hand, the mechanical scanning part is in a detachable quick connection locking mode, so that the mounting time is shortened.

The invention discloses a three-dimensional large aperture tissue engineering scaffold based on nano-fibers which is prepared in the following steps: a nano-fiber membrane which is made from electrostatic spinning is cut into fiber bundles with the diameter of 10mum-1mm. The fiber bundles are overlapped and the pore spacing between the fibers is 10mum-1mm. A three-dimensional structure is assembled and is bonded to be fixed. Thus, the three-dimensional large aperture tissue engineering scaffold which comprises the nano-fibers is obtained. The three-dimensional large aperture tissue engineering scaffold based on the nano-fibers has the beneficial effects that: (1) a nano-fiber secondary structure macroporous layer of the scaffold can promote the growth, the proliferation, the differentiation, and the like of target cells to form certain tissues, and a micron fiber primary structure macroporous layer of the scaffold can provide full tissue ingrowths space to defect internal cell tissues; (2) with good mechanical property, the scaffold can greatly reduce the requirement of polymeric biomaterials and degradation products; (3) the scaffold can be applied to bulk defect repairing and organizing engineering of tissues including bones, tendons, cartilages, skins, etc.