383 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 relates to a preparation method of nanostructured array chip with surface plasma for resonance imaging. The preparation method is characterized by comprising the following steps: (1) selecting and cleaning a substrate; (2) using a vacuum evaporated coating to coat a first metal film on the substrate; (3) self-assembling a layer of polystyrene nanoparticles on the metal film; (4) coating a second metal film in a way of evaporation on the self-assembled layer so as to fill the gas between balls; (5) eliminating the nanoparticles with the Lift off technology; (6) using laser direct writing machine to manufacture a lattice mask plate of the level of micron; (7) adopting the photolithography to transmit the mask figure to the substrate; (8) acquiring the lattice figure through developing and stripping of photoresist; (9) using a chemical method to eliminate the excessive metal and photoresist; thus the metal lattice chip of the cyclical nanostructure can be formed. The method adopts the polystyrene nanoparticles for self-assembly so as to prepare the cyclical nanostructure, and thus is suitable for massive production of the nanostructure.

The invention discloses a preparation method of a perovskite quantum dot array, which is characterized in that: (1) obtaining a template; (2) filling a precursor solution of the perovskite quantum dotinto the template in the step (1), heating and drying to obtain the perovskite quantum dot array. After filling the lattice with the precursor solution, the perovskite quantum dot material in the prior art cannot be mixed with a photoresist to prepare an array pattern by photolithography by heating the perovskite quantum dot material in situ to generate the perovskite quantum dot. The perovskitequantum dot array generated in situ by the method can be applied to display devices, photodetectors and the like.

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 preparation method of a novel embedded type nano dot array structure surface enhanced Raman active substrate. The substrate takes an aluminum sheet with an ordered concave pit array structure on the surface as a template and materials with SERS (Surface Enhanced Raman Scattering) performances are deposited to obtain a large-area and highly-ordered nano dot array structure embedded into a groove on the concave pit substrate. The nano dot array provided by the invention can be used for adjusting structure parameters and shapes of the embedded type nano dot array according to the size of the concave pit array, so that different influences on the Raman surface enhancing effect by different embedded type metal nano array substrates are realized. The preparation method has the advantages of simplicity in operation, no need of transferring, low cost and easiness for industrial production; the shape of the substrate is highly ordered and the Raman activity is high; and the substrate has the remarkable Raman surface enhancing effect on analytes with different concentrations and has very high detection limit.

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.

A density-adjusting method of a liquid-discharging apparatus having a head including a plurality of juxtaposed liquid-discharging units having respective nozzles, forming dots by landing droplets discharged from the nozzles onto a droplet-landing object, and providing half tones by arranging a dot array is provided. A density-measuring pattern including all pixel trains lying in the main scanning direction with a constant density is formed, the density of the pattern is scanned so as to obtain density information and the relationship between the number and the density of droplets with respect to each pixel train. Upon receipt of a discharge command signal, based on the obtained data with respect to each pixel train, the density of the pixel train corresponding to the discharge command signal is adjusted by making the number of droplets to be actually discharged from the nozzles different from that of droplets discharged according to the discharge command signal.

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.

Provided is a quantization processing method using dither patterns that make it possible to obtain a dot array having excellent dispersibility even in the case of a single color or mixed color inks. For this purpose, first and second dither patterns are prepared in order to respectively quantize multivalued data for a first ink to different pieces of binary data, respectively. Also, third and fourth dither patterns are prepared in order to respectively quantize multivalued data for a second ink to different pieces of binary data. Further, on the basis of a combination of the multivalued data on the first ink and the multivalued data on the second ink, a quantization unit for the first ink, and a quantization unit for the second ink are determined.

The invention provides a character rolling method. The method includes the following steps: 1) acquiring the number of characters capable of being displayed in a character display area of a screen; 2)setting a character display window, the length of which is 1 plus the number of the characters capable of being displayed in the character display area of the screen and the starting location of which is level with that of a character string to be displayed; 3) converting the characters in the current character display window into pixel lattice data; 4) reading the pixel lattice data into a cache, then conveying the pixel lattice data into a display channel to display the pixel lattice of the character string in the current cache and rolling the pixel lattice in the character display area ofthe screen at the speed of K rows of pixels per time; and 5) judging whether the character strings to be displayed are all displayed, if not, moving the character display window backwards by a character, releasing the cache and returning to step 3), otherwise, the display of the character strings is over. The method has the advantages of high efficiency and low complexity and is especially suitable for an embedded system.

A wire dot printer head of the present invention has an armature that has an arm supporting a printing wire and pivotably provided at the position opposite to the core, and a coil spring that one end comes in contact with the arm for urging the armature in the direction away from the core, wherein the one end of the coil spring supported by the supporting member is brought into contact with the armature to apply return force to the armature. In order to prevent the breakdown of the armature due to a contact of the coil spring and to realize a stabilized urging operation of the coil spring, a winding end of the coil spring at the one end is located at the position inside of the coil spring and nearer to the supporting member from the contact position where the coil spring comes in contact with the armature.

The present invention provides a display screen capable of self-checking fault point and a method of self-checking fault point, the display screen includes a microprocessor and conjoint CPLD or FPGA control system, a LED diode, including tandem resistance before the overall power of the LED diode lattice, and an amplifier and A / D converter. The microprocessor MCU in the display screen controls CPLD or FPGA scanning method, controlling procession drive by decoding circuit, controlling LED luminescence and nonluminescence one by one. The display screen of the invention capable of self-checking fault point has a simple structure, lower cost, the method of the self-checking fault point has an accurate effect, quick speed, effectively resolving the detecting problem of the concentrated light apparatus in the poblic location, LED for example.

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.

The invention relates to a photonic crystal wavelength division multiplexer and a design method thereof. The design method comprises the following steps: (1) a cylindrical air column with radius of r arranged in triangular lattice is introduced into a two-dimensional plate composed of waveguide materials to form a two-dimensional photonic crystal; (2) the air columns on at least two lines are removed from the two-dimensional plate so as to form at least two linear defects, an input waveguide and at least an output waveguide, and air columns of odd-numbered lines not less than 7 are reserved between the input waveguide and the output waveguide; (3) resonant cavities with resonant modes in odd and even symmetry are constructed in the reserved air columns. The operating wavelength can be adjusted by changing structural parameters or lattice constants of the resonant cavities; wavelength division multiplexers with arbitrary multi-path download channel number can be manufactured by arranging certain resonant cavities and wave guides. The download bandwidth of the invention is less than 0.5nm and can be applied to dense wavelength division multiplex systems with wavelength interval standard of 0.8nm.

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.

The invention provides a binocular calibration method based on a chaotic particle swarm optimization algorithm. A plurality of sets of dot array planar calibration board image pairs with different poses are simultaneously photographed through two image cameras. On condition that distortion is not considered, initial values of inner parameters and outer parameters of a left image camera and a right image camera are obtained by means of a Zhang's planar template linear calibration method. Then on condition that a two-order radial distortion and a two-order tangential distortion are considered, a three-dimensional reprojection error is minimized by means of the chaotic particle swarm optimization algorithm, thereby obtaining final inner parameter and final outer parameter of the two image cameras. In an iteration optimization process, a global adaptive inertia weight (GAIW) is introduced. A particle local neighborhood is constructed by means of a dynamic annular topological relationship. Speed and current position are updated according to an optimal fitness value in the particle local neighborhood. Furthermore chaotic optimization is performed on the optimal position which corresponds with the optimal fitness value in the particle local neighborhood. The binocular calibration method effectively settles a problem of low calibration precision caused by a local extreme value in a previous particle swarm optimization algorithm, thereby improving binocular calibration precision and ensuring high precision in subsequent binocular three-dimensional reconstruction.

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.