376results about How to "Achieve focus" patented technology

The invention discloses an ultrathin optical lens construction method based on an artificial microstructure super surface. The ultrathin optical lens construction method comprises the following steps that step (1) required working wavelengths are selected within the range from visible light to intermediate infrared wavelength bandwidth of 600nm-20 microns; incident light irradiates to the artificial microstructure super surface, and phase distribution on the artificial microstructure super surface is calculated according to the required positions of emergent focus points; step (2) rotationally symmetrical periodic structures are designed according to a certain period, and concrete phase values are determined through combination of the obtained phase gradient distribution and the periodic structure units on the surface; and step (3) columnar structures of determined height are selected to act as basic units of the artificial microstructure super surface, and corresponding concrete realization structures are designed according to the phase requirement of each basic unit. The effect of an optical lens at the macro level is realized by the micro-nano structures, the optical size is extremely low under the condition of maintaining high transmittance, and the optical lens is a double-plane lens.

The invention discloses a phased-array ultrasonic detection method for interfacial de-bonding of a composite material. The method comprises the following steps: (1) sequentially triggering each wafer of a phased-array probe to generate ultrasonic signals, superposing the ultrasonic signals, propagating the ultrasonic signals inside the composite material, and reflecting the ultrasonic signals during the interface de-bonding or interfacial de-bonding of the composite material; (2) superposing the reflected ultrasonic signals, receiving the ultrasonic signals by using the phased-array probe, performing data processing, and then outputting a phased-array scanning image through a phased-array display instrument; (3) comparing an ultrasonic detection image during the good interfacial bonding of the composite material with an ultrasonic detection image during the interfacial de-bonding of the composite material to judge whether the composite material has a de-bonding defect. The method has the advantages of high detection accuracy, simple operation process and the like.

The invention discloses a voice coil motor capable of realizing OIS (optical image stabilization) through pure translational motion. The voice coil motor comprises a case consisting of a lower cover and a metal magnet yoke, a lens holder arranged in the case, a plurality of magnets arranged on inner walls of the magnet yoke, a focusing coil capable of interacting with the magnets to control focusing of the lens holder, translation coils capable of interacting with the magnets to control the lens holder to move in a plane perpendicular to the lens optical axis, a fixing device and a limiting device, wherein the lens holder can move back and forth along the optical axis relative to the fixing device, and the limiting device fixes the lens holder in the plane perpendicular to the optical axis. The fixing device and the limiting device are matched, so that the translational motion of an automatic focusing part can be conducted in one plane, the deflection can be avoided, and the image stabilization effect is very ideal.

The invention belongs to the field of electrofluid jet printing spray-head correlation technique, and discloses an airflow auxiliary electric jet printing spray-head integrated with a grounding electrode. The airflow auxiliary electric jet printing spray-head comprises a liquid inlet cylinder, a gas hood, a metal needle head, an electric lead, an electrode cover and an annular electrode. The liquid inlet cylinder is connected to the gas hood and is partially held in the gas hood; two ends of the gas hood connected with the liquid inlet cylinder and the electrode cover; one end of the metal needle head and the liquid inlet cylinder form threaded connection, and the other end of the metal needle head penetrates through the gas hood so as to stretch into the electrode cover; one end of the electric lead is connected to a high voltage power supply, and the other end of the electric lead penetrates through the liquid inlet cylinder so as to be connected to the metal needle head; the annular electrode is embedded into the electrode cover; and the grounding electrode is integrated into the airflow auxiliary electric jet printing spray-head through grounding. The airflow auxiliary electric jet printing spray-head provided by the invention is provided with the grounding electrode through arranging the annular electrode, so that a collecting substrate has no need to be grounded, and the application range and the flexibility are improved.

The invention discloses a resistance choke type tiny particle and cell detection micro-fluidic chip and a preparation method. A PDMS (polydimethylsiloxane) cover plate (1) and a substrate (2) are bonded to form the resistance choke type tiny particle and cell detection micro-fluidic chip, the shape and the size of the substrate (2) adapt to those of the cover plate, at least one pair of tiny electrodes (8) are arranged on the substrate (2), a micro-fluidic pipeline is arranged on the cover plate, one surface of the substrate (2) with the tiny electrodes and a contact surface of the micro-fluidic pipeline contacting with the substrate are bonded in an aligned manner, the micro-fluidic pipeline is closed and comprises a sample inlet (4), a main pipeline (7) and a sample outlet (3), and the main pipeline (7) is provided with a sample inlet pipeline (10), a shrinkage detection pipeline (11) and the narrowest portion (5). A complex pipeline and fluid control system needed by sheath fluid focusing technology is avoided, flow resistance increase effect caused by pipeline size reduction is avoided by optimized structural size parameters, and detection throughput and sensitivity are improved.

An embodiment of the application provides a camera module and a mobile terminal. The camera module may comprise the following parts: a photosensitive chip, and a lens disposed on the photosensitive line of the photosensitive chip; a circuit board, comprising a hollow area, wherein the photosensitive chip is disposed in the hollow area; a plurality of shape memory alloy wires, wherein one ends of respective shape memory alloy wires are connected to the photosensitive chip, and the other ends are connected to the bottom edge of the hollow area of the circuit board; and a plurality of metal domes, wherein one ends of respective metal domes are connected to the photosensitive chip, and the other ends are connected to the upper surface of the circuit board, when the current of the plurality ofshape memory alloy wires flowing there-through changes, the length thereof changes accordingly, and the length of the plurality of shape memory alloy wires changes to make the position and/or the tiltangle of the optical axis relative to the incident light of the photosensitive chip change in the hollow area. The embodiment of the application reduces the size, weight and cost of the camera, and also reduces the power consumption of the camera module.

The invention discloses a zoom assembly, which is applied to realize focusing of a lens assembly. The zoom assembly comprises a deformation lens, a squeezing member and a driving member, wherein the squeezing member can be bonded with the deformation lens; the deformation lens is a lens capable of changing a focal length by deformation; the driving member is used for driving the squeezing member to squeeze the deformation lens to change the shape of the deformation lens to change the focal length of the deformation lens. The zoom assembly of the invention can be applied to focusing in variousshooting scenes, has a simple structure, is easy to install and occupies small space. The invention also discloses a lens assembly and an image capturing module, which have the above beneficial effects.

The invention provides a camera anti-shake structure and belongs to the technical field of machinery. The structure solves the serious problem of shake of two axes of the existing camera. According tothe camera anti-shake structure, a camera comprises a framework and a limiting frame; the limiting frame is arranged in the framework; a prism and a lens are arranged in the limiting frame; a focusing magnet is arranged in the framework; an outer cover is arranged on the framework in a covering manner; the anti-shake structure comprises an anti-shake coil I arranged on a circuit board, an anti-shake coil II arranged on the outer cover, an anti-shake magnet I arranged in the framework and an anti-shake magnet II arranged on a side wall of the limiting frame; the anti-shake coil I and the anti-shake magnet I are arranged oppositely; the anti-shake coil II and the anti-shake magnet II are arranged oppositely; and length directions of the anti-shake coil I and the anti-shake coil II are perpendicular to a length direction of the focusing coil. The anti-shake magnet II and the anti-shake coil II of the structure can vertically compensate a deviation of camera shake in a shooting process ofa person, and the anti-shake adjustment of the two axes of the camera is achieved.

The invention provides a method for searching subjects of intelligent equipment. The method comprises the following steps: opening a front camera and a rear camera of the intelligent equipment, and displaying the front camera and the rear camera in the display screen of the intelligent equipment; determining the current watching position on the screen of a user according to images, including user eyeball information, acquired by the front camera; and focusing and shooting pictures including subject content according to the watching position, and identifying and searching according to the subject content of the pictures. According to the method and device, subjects can be focused and searched quickly by means of observation of user eyes, the convenience of user operation is greatly simplified, and the efficiency of subject searching can be improved.

The invention relates to an air-coupled capacitive micromachining ultrasonic transducer, a preparation method and application. A transducer array comprises 16 array elements; each array element is formed by multiple sensing units; each sensing unit is structurally formed by an upper electrode 1, a vibrating diaphragm 2, a cavity 3 and a base 5 sequentially from top to bottom; and each base is usedas a lower electrode. The working frequency of the designed transducer is 100kHz to 2MHz. The transducer array is manufactured based on an SOI bonding process; each vibrating diaphragm is made of monocrystalline silicon; each upper electrode is gold or aluminum; an insulating layer 4 is silicon dioxide or silicon nitride; and the array elements of the transducer are divided through etching the low-resistance-silicon bases to form grooves, so that the array with the multiple array elements is formed. According to the air-coupled ultrasonic transducer, an ultrasonic wave in a metal plate or a composite plate is excited through an air coupling manner and is used for nondestructively detecting internal defects of the plate. The transducer is matched with a phased array system, and pulse drivesignals of the array elements are delay-controlled, so that the phase-controlled deflection and the focusing of an acoustic beam are adjusted, and the freedom degree of detecting is increased.

A system and method are disclosed which provide a look-down digital imaging device capable of scanning a calibration area included within such look-down digital imaging device to capture image data for the calibration area and calibrate itself based on analysis of such captured image data. More specifically, a preferred embodiment includes a calibration area that is integrated internally within the look-down digital imaging device. When performing calibration in such a preferred embodiment, the scan head of the look-down digital imaging device is operable to align itself with the calibration area to allow for a scan of the calibration area (i.e., the capture of digital image data of the calibration area). In one embodiment, a look-down digital imaging device does not achieve a focused scan of the calibration area, but is capable of utilizing captured unfocused digital imaging data for calibration. In a preferred embodiment, a look-down digital imaging device achieves a focused scan of the calibration area, thereby enabling a further accurate calibration. More specifically, a preferred embodiment folds the optical path of the reflected light from the calibration area in order to have the optical path of such calibration area accurately mimic the optical path of an original to be scanned, thereby allowing for focused calibration to be achieved.

The invention discloses a phased array ultrasonic testing method for a butt weld of a TMCP steel plate, and belongs to the technical field of non-destructive testing of a quality control system. A testing system of the butt weld of a TMCP steel plate with a wall thickness below 25mm is formed by a phased array ultrasonic detector, a phased array operating system, a high frequency linear array shear wave probe and a calibration test block to realize detection of welding defects of the butt weld. Due to the anisotropic characteristics of TMCP steel, when phased array ultrasonic wave is used to detect the butt weld, a special method is needed to calibrate the testing system and correct test results to achieve accurate detection. The phased array ultrasonic testing method just overcomes the above shortcomings, and the phased array ultrasonic testing method is high in on-site detection efficiency and accurate in results, and has good implementability.

The invention discloses a cavity pump light parameter oscillator of single-ended output. The oscillator comprises a laser pump source, a focusing lens, an input coupling mirror, a laser gain crystal, a diachronic mirror, a non-linear crystal, a first curved surface mirror, piezoelectric ceramic arranged on the non-linear crystal and a second curved surface mirror arranged on a reflected light path of the diachronic mirror. The input coupling mirror, the laser gain crystal, the diachronic mirror, the non-linear crystal and the first curved surface mirror form a laser resonant cavity. The first curved surface mirror, the non-linear crystal, the diachronic mirror and the second curved surface mirror form a signal light resonant cavity. The pump source carries out pumping via the focusing lens, population inversion is formed in a gain medium, laser oscillation is formed in the laser resonant cavity, and an oscillated laser generates signal light and forward and backward idle light via the non-linear crystal. Backward idle light is reflected by the second curved surface mirror and then is coupled and output with forward idle light generated by the non-linear crystal via the first curved surface mirror so as to realize single-ended output of intermediate infrared idle light.

The invention discloses a one-dimensional metallic photonic crystal plano-concave mirror for cylindrical symmetrical vectorial light beam focusing, and relates to the field of light field regulation in sub-wavelength photonics. The plano-concave mirror is composed of a one-dimensional metallic photonic crystal with metallic layers and dielectric layers arranged periodically and alternatively, and along the periodic photonic direction of the photonic crystal, one side is a plane while the other side is a hemispherical concave surface. By making full use of negative refraction properties and simultaneous orthogonal polarized light regulation capacity of the photonic crystal, the structure can effectively focus radial and spiral polarized light, and sizes of focused light spots reach sub-wavelength magnitude. In other words, by the structure, sub-wavelength focusing of cylindrical symmetrical vectorial light beams of any polarization component can be realized. By changes on constituent materials and structural parameters, focusing effect can be realized within broadband. The plano-concave mirror is simple in constituent material, easy for designing parameters and structurally easy to produce, and has good application prospects in the fields of near-field optics, quantum optics and the like.

The invention relates to a focused ion beam four-stage grid mesh system achieving fixed point removal and a method thereof. With the adoption of a three-stage spherical grid mesh, extraction, shaping and focusing of an ion beam of a wide-beam cold cathode ion source are realized, and a position of an ion beam focus can be adjusted according to the size of the spherical radius of the grid mesh; by changing a distribution map of small holes and the sizes of the small holes in the grid mesh, the size of a beam spot and the size of a beam current are adjusted; and through adjustment on electric potential of an accelerating grid, an ion motion trace can be controlled effectively, and loss and grid mesh loss in an ion motion process can be reduced. The fixed point removal on a processing surface can be realized, and the engineering application of an ion beam technology in China shall be pushed.

A projection optical system satisfies the following conditional equation: 0.01<{(tan θ f1−tan θ f2)−(tan θ n1−tan θ n2)}·(β2/β1)<0.20. If, however, the normal line and longer side directions of a screen surface are z and x directions, respectively, an incident angle component on an xz-plane with respect to the screen surface is an incident angle θ, the larger incident angle θ of a light ray in light rays incident on respective edges of the upper and lower sides of the screen through the center of a stop is θ; f while the smaller incident angle θ of the light ray is θ n; θ f1 and θ f2: the maximum and minimum incident angles θ f at the maximum and minimum projecting magnification absolute values at a focus adjustment time, respectively, θ n1 and θ n2: the maximum and minimum incident angles θ n at the maximum and minimum projecting magnification absolute values at the focus adjustment time, respectively, and β1 and β2: the maximum and minimum incident magnifications at the maximum and minimum projecting magnification values at the focus adjustment time (if the magnification is negative, the magnification value is that at the absolute maximum or minimum time), respectively.

The invention relates to a compensation device of a system for detecting and correcting human eye wave-front aberrations, and the compensation device is arranged inside the system for detecting and correcting human eye wave-front aberrations. The compensation device comprises a focusing system that consists of an expanded beam lens, a collimating lens and an electrically-controlled precise translation stage, wherein the collimating lens is fixed at the movable end of the electrically-controlled precise translation stage and also connected with a computer control system. The compensation device further comprises a defocusing compensation system that is arranged between a light splitter and a deformable mirror and consists of a telescopic system and an electrically-controlled precise translation stage, wherein the electrically-controlled precisen translation stage is arranged between two lenses of the telescopic system and connected with the computer control system. Compared with the prior art, the compensation device has the advantages that: the compensation device has good continuity and can correct various defocusing amount without limitations as compared with an insertion-type compensation method; and the compensation device is advantageous in high accuracy, rapidness and accurate displacement as compared with a manual translation stage.

The invention discloses an electric control zooming plane lens which comprises a first electric control zooming liquid crystal lens, a second electric control zooming liquid crystal lens and a super lens with a fixed focal length which are cascaded. In a state of not applying an electric field, the arrangement direction of molecules in the first liquid crystal layer of the first liquid crystal lens is parallel to the overall mirror surface direction of the first liquid crystal lens, the arrangement direction of the molecules in the second liquid crystal layer of the second liquid crystal lensis parallel to the overall mirror surface direction of the second liquid crystal lens, and the arrangement directions of the molecules in the first liquid crystal layer and the molecules in the secondliquid crystal layer are perpendicular to each other. The electric field is applied to the first liquid crystal layer and the second liquid crystal layer respectively, and the molecular arrangement state of the first liquid crystal layer and the second liquid crystal layer is adjusted by adjusting the electric field intensity. The plane lens is the super lens with a fixed focal length. The planarlens group has an electric control zooming function and is insensitive to polarization based on the combination of the liquid crystal lens and the super lens which are arranged in a cascaded manner,a high-quality imaging effect is achieved and the practical application of the planar lens technology is promoted.

The invention discloses a high-frequency ultrasonic online monitoring method for internal defects of a metal movable molten pool. The high-frequency ultrasonic online monitoring method comprises the following steps: providing N focusing points of different depths along the center line of the molten pool, obtaining the emission angle thetas of an ultrasonic beam according to the relationship between the focusing points and an incident point in order to obtain N groups of fiber array delay rules corresponding to the focusing points of all angles; exciting a laser according to a delay rule corresponding a first focusing point F1 to realize the incidence of the ultrasonic beam focused at a point N1, and sampling; replacing the delay rule, and exciting the laser according to a delay rule corresponding to a next focusing point F2; repeating the previous steps to finally obtain signals of all focusing points Fi; when a spray nozzle moves to a next position, repeating the previous data acquisition and storage step; starting to analyze data of M positions collected on a straight line; performing drawing analysis on a two-dimension matrix, wherein one or more crescentic ultrasonic signals, namely, diffraction signals of slag inclusion or pores are found in an image rating range.

The embodiment of the invention discloses a video polling method and apparatus. The number of alarm information corresponding to each collection device is stored in a database, the larger the number is, the more attention the corresponding collection device is worthy; therefore, according to the number, the weight corresponding to each collection device is determined, the larger the number of thealarm information is, the longer the time length is; and a playing time period corresponding to each collection device is determined according to the determined playing time length. A management device controls a TV wall to perform video pooling according to the determined playing time period corresponding to each collection device. Therefore, by application of the scheme, the playing time lengthof the collection device worth attention on the TV wall is longer, and the focus on key areas is achieved.

The invention discloses a water guide laser processing device and a processing system. The device comprises a table-shaped reflector and a coupling water cavity which are coaxially arranged in sequence along a transmission direction of laser, the table-shaped reflector is used for inputting the central beam of the laser into the coupling water cavity after total reflection light guide, and transmitting the laser guided by total reflection along a water column emitted from the coupling water cavity, and a workpiece is cut by using the laser in the water column. The invention further discloses awater guide laser processing system comprising the device. According to the invention, the central beam of the laser is converted into an edge beam by using the table-shaped reflector, so that the power distribution of the laser finally emitted from the coupling water cavity is more uniform, the taper effect when the water guide laser cuts the workpiece is improved, and the depth processing capability is expanded.

The invention discloses a two-dimensional scanning varactor active super-surface electromagnetic lens antenna, which comprises a focusing lens, a two-dimensional scanning array, gaskets, a support column, a horn antenna and a base. The focusing lens is a super-surface electromagnetic lens. The two-dimensional scanning array, the focusing lens and the support column are connected by the gaskets inturn. The two-dimensional scanning array is formed by superimposing two one-dimensional scanning arrays: an x-direction scanning array and a y-direction scanning array, wherein the y direction is usedas the polarization direction, the z direction is used as the axis-of-symmetry direction of the lens, and the bias lines of the varistors in the two one-dimensional scanning arrays are in the x direction. The antenna realizes two-dimensional scanning by changing the bias voltages of the varactors. The scanning array realizes two-dimensional scanning through the one-dimensional scanning arrays realized by two groups of varactor active super-surfaces, the scanning directions of the two arrays are orthogonal, and the two arrays are longitudinally superimposed. By using the method, the complexityand cost of super-surfaces in a large-scale two-dimensional scanning array can be reduced. Meanwhile, the focusing lens is realized by a super-surface, and the longitudinal size is reduced.