378 results about "Dot array" patented technology

The invention provides a calibration method for a binocular stereo measurement system, and belongs to the technical field of measurement and test. The invention adopts a plane calibrating board having a characteristic dot array with an accurate given distance between the centers of two characteristic dots; the calibrating board is shot from more than three angles; initial values of the intrinsic and extrinsic parameters of two cameras are solved by using the linear method under a pinhole model; the distortion effect is considered; the intrinsic and extrinsic parameters of the two cameras are taken as optimization variables for a first optimization; the space coordinates of the centers of the characteristic dots on the calibrating board are taken as optimization variables for a second optimization; the translation vector between the cameras is scaled to the ratio of the calculated distance to the given accurate distance, thus getting a calibration result of the parameters; the result of the second optimization is got by using the intrinsic parameters and the relative attitude parameters of the two cameras. Considering the influence of the geometrical errors of the calibrating board, the method reduces the manufacturing, measurement and calibration requirement of the calibrating board and gets calibration result of high precision.

The invention relates to a preparation method for a small silicon-based nano hollow array with orderly heights, belonging to the technical field of nano-structure preparation. The preparation method employs large-diameter polystyrene nano-spheres which are self-mounted into a single-layer nano-sphere film serving as masks on a Si substrate. After going through multiple technical procedures such as reaction ion lithography, direct current sputtering metal films, selective corrosion and the like, the mask is converted into a small inverted-pyramidal nano-hollow array, which is a two-dimensionalhexagonal dot array. The cycle of the nano-hollow arrays is determined by the diameters initially selected for the polystyrene nano-spheres. The invention is likely to be used in fields of growth of controllable quantum structures, photonic crystal manufacturing, quantum logic operation, magnetic storage media, etc.

The invention discloses a metal nanodot array surface enhancing Raman active base and a preparation method thereof. The base takes silicon single crystals as the substrate, and metal nano particles forming an array structure are deposited on the surface of silicon; and further, the particle sizes of the metal nano particles range from 16 to 85nm, and the center distances of the particles range from 99 to 111nm. The metal nanodot array surface enhancing Raman active base provided by the invention is uniform in morphology, is controllable in structure, has a remarkable surface Raman enhancing effect on analytes of different concentration, and has a uniform and stable enhancing signal. Through the method provided by the invention, structural parameters and morphology of the metal nanodot array can be adjusted according to structural parameter of an ultrathin aluminum oxide template, and different influences on the Raman surface enhancing effect by different metal nanodot array bases can be realized; and further, the base and method have the advantages of simplicity for operation, low cost and easiness for industrial production.

A liquid ejection device of the invention is constructed to eject a liquid to an ejection object. The liquid ejection device has a dot data generator configured to generate dot data from given image data, where the dot data represents a dot creation state in each pixel set on the ejection object. The liquid ejection device also has a liquid ejector equipped with a nozzle array including multiple nozzles aligned in a specific direction substantially perpendicular to a scanning direction. The liquid ejector makes multiple scans of the nozzle array in the scanning direction in a common printing area according to the generated dot data and ejects the liquid to the ejection object to create dots. The dot data generator has a specific print mode that generates corrective dot data by skipping a virtual dot array created by one scan from a group of dot arrays to be created by the multiple scans of the nozzle array, in order to prevent a potential contact with a dot array to be created by another scan. This arrangement desirably prevents unevenness of liquid ejection caused by a meandering scan of at least either the liquid ejector or the ejection object.

The invention discloses a video and image lossy compression method for image coding. The method combines traditional JPEG, JPEG2000, H.264 and HEVC-code standard algorithms with super-resolution image reconstruction and designs an image compression method combining the super-resolution reconstruction on the basis. Downsampling is carried out on an input video and image, wherein a downsampling method adopts a Bicubic algorithm and a downsampling multiple is 2. The number of dot arrays of a downsampling image is only 1/4 of that of an original image. The encoding rate of the downsampling image is far lower than that of an original input image so that the encoding rate is reduced. At the same time, on the basis that robustness differences of a residual image and a general image are analyzed, a negative-feedback step is introduced in the design so that part of high-frequency detail information lost in a super-resolution image reconstruction step is remedied and reconstructed video or image quality is improved. Compared with the JPEG and the H.264 standard algorithms, the compression method reduces the encoding rate greatly under a situation that image quality is the same.

The present invention is one kind of apex curvature radius measuring method and device for aspherics and relates to the technology of measuring aspherical optical elements. Based on ray tracing principle, laser beam is projected to the measured aspherics in the dot array structural light mode, the positions of one incident light spot and the reflected light spot on light receiving screen are measured with a CCD camera, and the images of the incident flare and the reflected flare are analyzed and processed in computer, so that the apex curvature radius of the aspherics is obtained. The method has relatively high measurement precision, especially to large apex curvature radius of aspherics, and the present invention may also realize the in-situ measurement of the aspherics in its production.

In a liquid-discharging apparatus, the work volume of a cleaning roller of a liquid-discharging head and the work volume of a waste-liquid receiver of a head cap are displayed. A dot array or a dot is formed by discharging a predetermined liquid from a plurality of liquid-discharging nozzles provided on a nozzle surface of the liquid-discharging head. The liquid-discharging apparatus includes a roller-wiping-count storage unit for storing the accumulated work volume of the cleaning roller during a period from the beginning of use to the present time, an idle-discharging-count storage unit for storing the accumulated work volume of the waste-liquid receiver during the period, and an information output unit that receives the work volumes from the storage units, and that outputs both of or the higher one of the work volumes.

The invention discloses a method for measuring simulated seabed terrain based on an active stereo vision technology and measuring equipment. By the stereo vision technology, a binocular camera is arranged on the outside of an experimental trough, and seabed terrain changes are measured contactlessly through glass sidewalls of the experimental trough. Partial flow field will not be disturbed, and synchronous acquisition of the whole simulated seabed terrain can be realized. According to the invention, the active vision technology is used in underwater measurement. That is to say, by the utilization of auxiliary structured light irradiating underwater terrain through the glass sidewalls of the experimental trough, dense structured textures or dot arrays are formed on the terrain such that the camera can distinguish more easily. Meanwhile, quantity of terrain characteristic points is also increased. With the combination of the high-resolution camera, high-precision terrain data can be obtained. By the adoption of the method provided by the invention, noncontact, synchronous and high-precision measurement of the simulated seabed terrain can be realized, and corresponding problems existing in the prior art are solved.

The invention discloses a numerical value calibration method for a line structured light vision sensor. The method comprises steps: an equidistantly-arranged dot array is made as a calibration target, the target position and a focal length are initially adjusted to enable the target to be completely placed in a view field of a camera, and a target point image is distinct; the relative position between a line structured laser plane and the calibration target is precisely adjusted to enable the laser plane and the target plane to be coplanar; the power supply of the laser is cut off, the focal length of the camera is adjusted precisely again, the target image photographed by the camera is ensured to be distinct, an ellipse fitting method is adopted to obtain pixel coordinates of each target point center, and the pixel coordinates are stored in a matrix Q; the target center coordinates in the matrix Q are used for carrying out Delaunary triangulation on the pixel plane, the point at the left corner of the target is marked as the original point of a world coordinate system 0WXY, and world coordinates corresponding to a vertex are determined; and a linear transformation coefficient corresponding to each triangulation area is calculated, and the linear transformation coefficient is stored in a transformation coefficient matrix D. The calibration method of the invention is simple and easy to operate, the computing efficiency is high, and the calibration precision is good.

The present invention relates to a method for performing high speed electron beam lithography (EBL). An electron beam source (EBS), capable of emitting an electron beam towards the energy sensitive resist, forms a first pattern (P1) on the substrate, the first pattern defining a first direction (D1) on the substrate. The electron beam source then forms a second pattern (P2) on the substrate. The energy and/or dose delivered to the energy sensitive resist during the exposure of the first and the second pattern is dimensioned so that the threshold dose/energy of the energy sensitive resist is reached on the overlapping portions of the first and the second patterns (P1, P2). The invention provides a high speed technique for the production of substrates with high quality developed patterns, e.g. hole or dot arrays, by electron beam lithography. Each hole or dot may be defined by the mutually overlapping portions of the first and second pattern, e.g. exposed lines forming a grid, instead of addressing each dot or hole separately.

The embodiment of the invention discloses a brightness control method, an LED-lattice module and an LED-lattice screen, and aims to achieve brightness compensation of uneven seams in the LED-lattice screen. The brightness control method provided by the embodiment of the invention comprises the following steps: utilizing a distance sensor to acquire the detection distance between the edge of an LED-lattice module at the end and that of an adjacent LED-lattice module; judging the relationship between the detection distance and the standard distance; turning down the brightness of LEDs at the edge of the LED-lattice module at the end if the detection distance is smaller than the standard distance; and turning up the brightness of LEDs at the edge of the LED-lattice module at the end if the detection distance is larger than the standard distance. By implementing the scheme of the invention, uneven brightness of the LED-lattice screen at the spliced part due to uneven seams between the LED-lattice modules is eliminated, and accordingly, the display effect of the whole screen is improved.

The present invention details a nanostructured electrochemical biosensor based on aptamer as the molecular recognition probe. The biosensor is comprised of an electrochemical cell that can be plugged into an electric controller. This electrochemical biosensor contains a working electrode made of the micro-/nano-scale gold dot array pattern, on which aptamer is immobilized on the surface of the dot array as the molecular recognition probe. The aptamer is labeled with an electrochemical indicator. Reversible binding of an analyte to the aptamer causes the change in the conformation of aptamer, consequently brings the electrochemical indicator close to the electrode surface. This results in the electron transfer from the electrochemical indicator to the electrode, which can be read as a change in output current or potential. The invented biosensor is a portable point-of-care device that has higher sensitivity, allows the measurement of the analyte more rapidly and requires much less sample volume than is presently available with current methods of detection.

The invention provides a 3D visual display method, with the steps: data processing system uses the 3D object scanning equipment or artificial design, to obtain 3D data; through the calculation, the data processing system produces the node 3D coordinates value of 3D data corresponding to the space lattice (X, Y, Z) of 3D visual display device, in which X>=8, Y>=8, Z>=8; according to the 3D coordinates value, the data processing system outputs signal to 3D visual display device, making the node corresponding to the space lattice (X, Y, Z) to be luminous in the 3D visual display device, so to achieve the 3D visual display. The node luminous method includes LED conductive luminescence, sports particle collisions luminescence. The invention can display 3D composition and animation under no picture or video circumstances, making people viewing 3D results within 360-degree, with good display effect, and accurate, and it can easily control and adjust through data processing system (such as computers, etc.), and have wide application.

Provided are a photosensitive silane coupling agent for forming a low-defect microparticle pattern, dot array pattern, or hole array pattern through fewer steps, and a method of forming a pattern using such photosensitive silane coupling agent. Used is a photosensitive silane coupling agent comprising a 1,2-naphthoquinone-2-diazido-5-sulfonyl group or a 1,2-naphthoquinone-2-diazido-4-sulfonyl. group.

A non-linear processor for managing a speech signal is disclosed. The non-linear processor includes an adaptive lattice filter that generates a prediction error from a residual echo of the speech signal, a signum non-linearity unit that generates an excitation component from the prediction error, an excitation signal mixer that generates an excitation signal from the excitation component and a noise component, an inverse lattice filter that generates a modified residual echo from the excitation signal, and a gain adjuster that adjusts a power of the modified residual echo.

A method for manufacturing an optical sheet, comprises: (a) discharging a first lens material in liquid form being a material for a micro lens on a sheet in a dot array; (b) semi-curing the first lens material arranged on the sheet; (c) discharging a second lens material in liquid form being a material for the micro lens towards gap portions between the dots of the first lens material; and (d) forming a micro lens array by full curing the first and the second lens materials.

The invention provides a laying method of seed crystals and is used for the casting of quasi-monocrystalline silicon piece. The method comprises the steps of: seed crystals are laid on the crucible bottom, the seed crystals have a same growth surface crystal orientation of [001] or [001<->]; the seed crystals in close contact and fully cover the crucible bottom to form a seed crystal layer; the side crystal orientation of two adjacent contact the seed crystals belongs to the same crystal to the same crystal orientation family and constitute a coincidence position lattice type of grain boundary; when the side crystal orientation of the seed crystal is <110>, the crystal orientation of growth face of the adjacent seed crystals alternately splices front and back according to [001] [001<->], or one of the adjacent seed crystals rotates 90 DEG; when the side crystal orientation of the seed crystals is not <110> crystal orientation family, the crystal orientation of growth face of the adjacent seed crystals alternately splices front and back, or after the front and back alternate splicing, one of the adjacent seed crystals rotates 90 DEG. The laying of seed crystals reduces the occurrence of dislocation sources in the crystal introduction process. The invention also provides a preparation method of a quasi-monocrystalline silicon piece and the quasi-monocrystalline silicon piece.

The invention discloses a seamless acquisition method based on DDR2SDRAM array segmented storage, wherein a plurality of storage mapping monomers comprising a memory DDR2SDRAM, a three-dimensional waveform digital image processor and a three-dimensional data point lattice are adopted to alternatively carry out waveform data storage and mapping in a pipeline manner, such that acquisition of the acquisition system can not be stopped due to mapping and other operations so as to reduce a dead zone time and achieve seamless acquisition, wherein the DDR2SDRAM is divided into a plurality of storage units, and a storage depth is increased with a waveform obtained through triggering each storage unit without increase of the dead zone time. With the oscilloscope, segmented storage of the DDR2SDRAM array and alternate storage of the plurality of the DDR2SDRAM are adopted to achieve seamless acquisition at a slow speed base gear, and segmented storage of the DDR2SDRAM array is adopted to achieve seamless acquisition within a short time at a rapid speed base gear.

The invention provides a preparation method of a nano patterned sapphire substrate, which comprises the following steps: firstly, cleaning a sapphire substrate, and coating a metal aluminum film on the surface by vaporization; meanwhile, preparing a template with a nano structure, and generating a corresponding pattern on the aluminum film by imprinting or etching; putting the sapphire substrate into an electrolyte solution to carry out anodization until the color on the aluminum film surface obviously changes and the current drops to 0, and making a through hole, thereby obtaining a patterned nano structure on the aluminum oxide layer; depositing a metal nickel layer; putting the sapphire substrate into a strongly alkaline solution to dissolve out the aluminum oxide layer, thereby obtaining a metal nickel nanodot matrix on the sapphire substrate; and etching the sapphire by using the metal nickel dot matrix as a mask, thereby obtaining a nano structure array with controllable depth on the sapphire substrate. The method of anodizing aluminum is utilized to obtain the highly-ordered nano structure array. Compared with the prior art, the invention has the advantages of simple preparation process, favorable repetitiveness and high yield.