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45 results about "Strong focusing" patented technology
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In accelerator physics strong focusing or alternating-gradient focusing is the principle that the net effect on a particle beam of charged particles passing through alternating field gradients is to make the beam converge. By contrast, weak focusing is the principle that nearby circles, described by charged particles moving in a uniform magnetic field, only intersect once per revolution.
High power microwave plasma chemical vapor deposition device for diamond film
ActiveCN103305816ADeposition high speedHigh microwave powerChemical vapor deposition coatingResonant cavityHigh density
The invention relates to a high power microwave plasma chemical vapor deposition device for a diamond film, and belongs to the technical field of preparation of diamond films. The device comprises an upper cylinder and a lower cylinder of a resonant cavity, a deposition table for depositing the diamond film and a resonant cavity main body formed by semi-ellipsoidal microwave reflectors. The semi-ellipsoidal microwave reflectors are in smooth transition with the upper cylinder of the resonant cavity in shape, thus, guaranteeing that microwave entering into the resonant cavity is not scattered. At the same time, the semi-ellipsoidal microwave reflectors are arranged, so that the resonant cavity has strong focusing capacity of a microwave electric field for the convenience of focusing microwave energy above the deposition table so as to form a strong electric field area and high-density plasmas. The positions of the semi-ellipsoidal microwave reflectors are adjusted to adjust the resonant cavity of the device, so that distribution of the microwave electric field and plasmas in the device are optimized in real time. At the same time, a quartz glass window in the device is located below the diamond film deposition table, and other main parts of the device are far from the plasmas and can be directly cooled by water better.
Owner:HEBEI PLASMA DIAMOND TECH
Scanning Systems for Particle Cancer Therapy
ActiveUS20140163301A1Little functionSmall sizeX-ray/gamma-ray/particle-irradiation therapyQuadrupole fieldParticle beam
A particle beam to treat malignant tissue is delivered to a patient by a gantry. The gantry includes a plurality of small magnets sequentially arranged along a beam tube to transfer the particle beam with strong focusing and a small dispersion function, whereby a beam size is very small, allowing for the small magnet size. Magnets arranged along the beam tube uses combined function magnets where the magnetic field is a combination of a bending dipole field with a focusing or defocusing quadrupole field. A triplet set of combined function magnets defines the beam size at the patient. A scanning system of magnets arranged along the beam tube after the bending system delivers the particle beam in a direction normal to the patient, to minimize healthy skin and tissue exposure to the particle beam.
Owner:BROOKHAVEN SCI ASSOCS
Arc wide-beam transmission method and device for ultrasonic image-forming
The invention discloses a circular arc broad beam emission method for ultrasound imaging and a device thereof. The method comprises a setting step which is used for setting parameters of a focusing circular arc, and a calculating step which is used for calculating emission delay of all array elements in a transmitting aperture based on the set parameters of the focusing circular arc; wherein, a system controls all array element to emit ultrasonic according to the calculated emission delay of all array elements. The circular arc is adopted according to the method, which changes the calculatingmethod of the strong focusing emission delay; therefore, the beam does not focus on one point again so as to obtain the broad beam. Therefore, the method has no special requirement for emission wavesand can be implemented in most ultrasound machines.
Owner:SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
Strong-focusing straight-sided sector magnet of medium-energy rotary accelerator
InactiveCN101697658AReduce weightIncrease in sizeMagnetsMagnetic resonance acceleratorsStrong focusingMagnetic poles
The invention relates to a magnet structure of a rotary accelerator, in particular to a strong-focusing straight-sided sector magnet of a medium-energy rotary accelerator. The magnet consists of two parts symmetrical up and down, wherein each part comprises a circular cover plate; a plurality of magnetic poles are uniformly arranged in the middle of the cover plate; the magnetic poles have a straight-sided sector structure; a sector valley area is formed between two neighboring magnetic poles; and magnetic yokes are arranged on the periphery of the cover plate at positions just opposite to the outer side of each magnetic pole. By adopting the magnet structure with straight-sided sector magnetic poles and deep valley areas, the strong-focusing straight-sided sector magnet of the invention realizes the strong focusing force and also reduces the processing and assembling difficulties of a main magnet and other related elements of the rotary accelerator.
Owner:CHINA INSTITUTE OF ATOMIC ENERGY
Femtosecond optical parameter amplifier
ActiveCN103311791AOvercome the disadvantage of not being completely collinearEliminate spatial chirpLaser detailsNon-linear opticsTime responseOptical parametric amplifier
The invention discloses a femtosecond optical parameter amplifier. The femtosecond optical parameter amplifier is characterized in that birefringent crystals are inserted into stages of an optical parameter amplifier to separate signal light from idle light in time, and then the ultrashort time response of a pump laser pulse is utilized to selectively amplify only one path of laser, so that the pump light and the signal light in each stage of optical parameter amplification can work in the complete collinear condition, the spatial chirp is eliminated, and the conversion efficiency is improved. As shown in an experiment, the femtosecond optical parameter amplifier has the advantages of high conversion efficiency, no spatial chirp and strong focusing capacity.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Solid immersion lens with increased focusing capacity
InactiveUS20090225442A1Increase capacitySmall sizeRecord information storageOptical beam guiding meansCamera lensSolid mass
There is provided a solid immersion lens in a material of refractive index n1, having an effective dioptre (26) separating from a medium of refractive index n2, an optical axis, a virtual object focal point for a convergent optical beam entering the lens via the effective dioptre, this virtual object focal point being conjugate with a real image focal point. The dioptre (26) is defined by the equation √{square root over (x2+y2)}−n√{square root over ((x−a)2+y2)}=L, x, y are the coordinates of a point (I) of the dioptre (26) in a system (A, x, y) whose origin is the virtual object focal point (A) and whose abscissa axis is the optical axis (Ax),a is the, nonzero, algebraic distance between the virtual object focal point (A) and its conjugate (A′),L is the, nonzero, optical path, separating the virtual object focal point (A) from its conjugate (A′),n is the ratio n1 / n2 of the refractive indexes. The dioptre (26) is smooth and the conjugate (A′) lies downstream of the effective dioptre (26) for the optical beam.Particular application to reading, writing, reproduction of optical data.
Owner:COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
Particle light operating device based on annular-core coaxial helix waveguide optical fiber
ActiveCN109799571ARealize functionCladded optical fibreRadiation/particle handlingMicro imagingFiber
The invention relates to a particle light operating device based on an annular-core coaxial helix waveguide optical fiber. The particle light operating device is characterized in that the device comprises the annular-core coaxial helix waveguide optical fiber 1 with the fiber end polished into a fiber end cone frustum; the annular-core coaxial helix waveguide optical fiber 1 comprises a wrapping layer 3, an annular core 4 and a central core 6 consisting of multiple helix waveguides. The device can emit a strong-focusing ring lift field 10 from the fiber end of the annular-core coaxial helix waveguide optical fiber, and realizes stably three-dimensional capture of a particle 11 near the focusing point out of the fiber end, thereby realizing positioning and axis fixing functions to the particle 11; besides, fixed-axis rotation 15 and rotating ejection 16 of the particle 11 can be achieved by controlling energy of a phase vortex beam 14 emitted by the helix core. The particle light operating device can be used for light operation of micro-particles such as particles for optical information transmission, optical micro-operation and microimaging and drug particles, application of optical fiber integration devices and the like.
Owner:GUILIN UNIV OF ELECTRONIC TECH
Ion acceleration tube
InactiveCN105873349ASmooth transmissionScattering Angle GrowthPlasma techniqueUltra high voltageSecondary electrons
The invention provides an ion acceleration tube, which is used for a static electricity high-voltage ion accelerator. The ion acceleration tube adopts modularized structural design; the acceleration voltage of each ion acceleration tube module is about 250kV; a certain number of ion acceleration modules are connected in series; the required ultra-high acceleration voltage can be obtained. The ion acceleration tube module comprises a strong focusing acceleration region and a space charge neutralization region, and is used for eliminating the self space charge effect of ion beams; the accelerated transmission of ion beams exceeding 1mA can be realized. Meanwhile, the ion acceleration tube module is also provided with a secondary electronic strong inhibition structure; when an ultra-high voltage acceleration system exceeding 5MV end voltage is formed, the occurrence of full voltage effect can be effectively prevented. The ion acceleration tube provided by the invention has the advantage that the ion beams with the end voltage exceeding 5MV and the beam current intensity exceeding 1mA can be obtained. The ion acceleration tube is suitable to be applied in the fields of ion injection, ion beam tumor treatment, nucleopore membrane production, neutron radiography and the like.
Owner:INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
Particle light operation device based on annular core coaxial dual waveguide optical fiber
The invention provides a particle light operation device based on an annular core coaxial dual waveguide optical fiber. The particle light operation device is characterized by mainly consisting of a segment of annular core coaxial dual waveguide optical fiber 1, wherein a fiber end of the optical fiber is ground to form a fiber end cone frustum 2; the annular core coaxial dual waveguide optical fiber 1 comprises an envelope 3, a non-circular central helical fiber core 4 and an annular fiber core 5; the central helical fiber core 4 and the annular fiber core 5 are located in the center of the envelope 3; and the optical fiber can be prepared by rotating and drawing, or drawing as well as hot melting and twisting. On one hand, the particle light operation device can emit a strong focusing annular light field 9 from the fiber end of the annular core coaxial dual waveguide optical fiber to realize stable three-dimensional capture for particles 10 nearby a focusing point outside the fiber end, and realize positioning and axis-fixing functions for the particles 10. On the other hand, axis-fixed rotation 14 and rotary launch 15 of the particles 10 can be realized by controlling the energymagnitude of a phase vortex beam 13 emitted from the central helical fiber core. The particle light operation device can be applied to optical operation of small particles such as microfluid chips, cells or medicinal particles as well as application of optical fiber integrated devices.
Owner:GUILIN UNIV OF ELECTRONIC TECH
Low-contrast metasurfaces
Disclosed herein are metasurfaces formed on a substrate from a plurality of posts. The metasurfaces are configured to be optically active at one or more wavelengths and in certain embodiments are configured to form lenses having unexpectedly strong focusing power. In particular, the metasurfaces are formed from “low-contrast” materials, including CMOS-compatible materials such as silicon dioxide or silicon nitride. Accordingly, the disclosed metasurfaces are generally CMOS compatible and therefore embody a new paradigm in metasurface design and manufacturing.
Owner:UNIV OF WASHINGTON
Method for manufacturing broad-spectrum strong-focusing Fresnel lens
ActiveCN102854551AIncrease powerImprove conversion efficiencyCondensersLensFresnel lensCorrection algorithm
The invention provides a method for manufacturing a broad-spectrum strong-focusing Fresnel lens, belonging to the optics field. The method is used to solve the problems that a Fresnel lens imaging through a traditional concentration system has a poor effect of converging sunlight and is difficult to obtain higher conversion efficiency. A realization process of the method comprises the following steps: firstly, obtaining a iteration relation between dip angle ThetaBL of a ring zonal gear of a Fresnel lens and ring height HGR of the Fresnel lens by computation after a divergence angle Thetas of incident sunlight is introduced; adopting a prediction-correction algorithm to obtain an dip angle ThetaBL and ring height HGR of each ring, and using a Monte Carlo radiosity algorithm to obtain a power density Psi of the sunlight received by a fixed area in a focal plane; obtaining a power density limit value Psilim based on an imaging concentration principle; and calculating a spectrum range of a to-be-manufactured Fresnel lens : absolute value of (Psilim-Psi) is less than or equal to Epsilon, and manufacturing a die according to final parameters of the Fresnel lens obtained by simulation so as to obtain a lens entity. The methodprovided byf the invention is used for manufacturing the broad-spectrum strong-focusing Fresnel lens.
Owner:HARBIN INST OF TECH
Scanning systems for particle cancer therapy
ActiveUS9095705B2Little functionSmall sizeX-ray/gamma-ray/particle-irradiation therapyIrradiation devicesQuadrupole fieldParticle beam
A particle beam to treat malignant tissue is delivered to a patient by a gantry. The gantry includes a plurality of small magnets sequentially arranged along a beam tube to transfer the particle beam with strong focusing and a small dispersion function, whereby a beam size is very small, allowing for the small magnet size. Magnets arranged along the beam tube uses combined function magnets where the magnetic field is a combination of a bending dipole field with a focusing or defocusing quadrupole field. A triplet set of combined function magnets defines the beam size at the patient. A scanning system of magnets arranged along the beam tube after the bending system delivers the particle beam in a direction normal to the patient, to minimize healthy skin and tissue exposure to the particle beam.
Owner:BROOKHAVEN SCI ASSOCS
Method for regulating and controlling orientation of focal field space-time wave packet orbital angular momentum rotation axis
InactiveCN113759575ARealize regulationControl directionRadiation/particle handlingNon-linear opticsSpin angular momentum of lightHigh numerical aperture
The invention discloses a method for regulating and controlling the orientation of a focal field space-time wave packet orbital angular momentum rotation axis. The method comprises steps of carrying out targeted preprocessing operation of a circular polarization incident wave packet according to an expected topological charge number; taking the preprocessed circular polarization space-time wave packet as an incident field of a strong focusing system, and obtaining a vector space-time optical vortex on a focal plane through focusing of a high numerical aperture objective lens; after the spin angular momentum of the circularly polarized incident wave packet is focused by a lens, longitudinal orbital angular momentum with the topological charge number of + 1 or -1 being induced, and the longitudinal orbital angular momentum being mutually coupled with transverse orbital angular momentum in focal field space-time optical vortex; for transverse polarization components (namely x and y components) of focusing vector space-time optical vortex, the cross sectional area of a space-time plane in a wave packet can be changed by controlling the pulse width, and then the density ratio of longitudinal and transverse orbital angular momentum is changed, so the orientation of a total orbital angular momentum rotation axis in the transverse polarization components is controlled. According to the invention, the orientation of an orbital angular momentum rotation axis of a transverse polarization component is regulated and controlled, and a longitudinal polarization component with a complex vortex structure is generated.
Owner:UNIV OF SHANGHAI FOR SCI & TECH
Vaccine transdermal delivery device based on acoustically induced micro-pore arrays
The invention provides a vaccine transdermal delivery device based on acoustically induced micro-pore arrays. The device comprises a master control system, a high-frequency strong focusing ultrasonicexcitation assembly and a sound-permeable immunization patch; the high-frequency strong focusing ultrasonic excitation assembly comprises a high-frequency ultrasonic signal generating system, a firstultrasonic transducer connected with the high-frequency ultrasonic signal generating system, and a conical coupling conduit connected with the first ultrasonic transducer; and the conical coupling conduit is arranged on the sound-permeable immunization patch during administration, and the front end of the conduit outputs high-frequency strong focusing ultrasonic energy to induce skins to form micro-pores and the micro-pore arrays. The position, the size and the depth of the acoustically induced micro-pores are precise and controllable, and the number of the acoustically induced micro-pores canbe designed and optimized by array combination, so fully-automatic vaccine transdermal immunization is achieved.
Owner:SHENZHEN UNIV
Method for generating sub-wavelength space-time vortex under strong focusing condition
ActiveCN111722398AGreat application potentialOvercoming the problem of splittingOptical elementsSpace time domainHigh numerical aperture
The invention discloses a method for generating a sub-wavelength space-time vortex under a strong focusing condition. According to the method, an incident space-time wave packet is customized according to the topological charge of a focal field in a time-space domain, and after the customized wave packet is focused by a lens with a high numerical aperture, a space-time vortex light field with predetermined transverse orbital angular momentum in a sub-wavelength scale can be generated on a focal plane. The method for generating the sub-wavelength space-time vortex under the strong focusing condition is used for solving the problem that the space-time spiral phase is damaged after the space-time vortex in the free space is focused by the high numerical aperture lens.
Owner:UNIV OF SHANGHAI FOR SCI & TECH
High-energy micro-focus X-ray production equipment
PendingCN112291912AHigh energyReduce focus sizeMaterial analysis using wave/particle radiationX-ray tube with very high currentElectron sourceNuclear engineering
The invention discloses high-energy micro-focus X-ray production equipment, which comprises an electron source assembly used for generating high-energy electron beams and rotating target equipment used for being bombarded by the electron beams to generate high-energy X-rays, and the high-energy focused electron beams generated by the electron source assembly are bombarded to the rotating target equipment to generate high-energy micro-focus X-rays. According to the invention, a specific electron source and a linear accelerator are matched to provide the electron beam with long macro pulse and high average flow intensity, and the transverse size of the electron beam with long macro pulse and high average flow intensity is focused to a relatively small size at a targeting position through thefocusing of a solenoid and a strong focusing quadrupole lens group; and a beam spot measuring assembly is used for precisely measuring and controlling the transverse size of the electron beam, the size of the beam spot is controlled to 0.1mm or below, and the purpose of high-energy micro-focus X-ray output is achieved.
Owner:INST OF APPLIED ELECTRONICS CHINA ACAD OF ENG PHYSICS
High power microwave plasma chemical vapor deposition device for diamond film
ActiveCN103305816BDeposition high speedHigh microwave powerChemical vapor deposition coatingResonant cavityHigh density
Owner:HEBEI PLASMA DIAMOND TECH
Photoacoustic/ultrasonic dual-mode high-resolution microscopic imaging system and method
InactiveCN111948297AOvercoming the problem of low spatial resolutionAnalysing solids using sonic/ultrasonic/infrasonic wavesMaterial analysis by optical meansMicroscope objectiveMechanical engineering
The invention discloses a photoacoustic / ultrasonic dual-mode high-resolution microscopic imaging system and method. The system comprises a pulse laser generator, an ultrasonic probe, an ultrasonic generator, a digital delayer, a three-dimensional scanner and an acquisition card; wherein the three-dimensional scanner drives the ultrasonic probe to move in the transverse direction by one step to send out a position synchronization signal, the signal triggers the pulse laser generator to send out a laser pulse, and an opto-acoustic signal is excited through strong focusing of the objective lens;meanwhile, the synchronizing signal is connected into a digital delayer for delaying, an output signal triggers an ultrasonic generator to generate a high-frequency ultrasonic signal, and the high-frequency ultrasonic signal is strongly focused on a sample through an ultrasonic probe, so that a higher transverse resolution ratio is obtained; and finally, the photoacoustic signal and the ultrasonicsignal are amplified and then are sequentially acquired by the acquisition card. According to the invention, based on the photoacoustic / ultrasonic dual-mode high-resolution imaging, the application range of the system is expanded.
Owner:NANCHANG UNIV
Transmission lens with phase and amplitude independently regulated and controlled and transmission array antenna
InactiveCN113690629ARealize independent controlHigh wave transmittanceAntenna arraysMetal stripsAcute angle
The invention discloses a transmission lens with phase and amplitude independently regulated and controlled and a transmission array antenna. The transmission lens comprises a feed source and a transmission lens, the phase center of the feed source is located on the focus of the transmission lens, and the transmission lens comprises a plurality of periodically arranged metasurface lens units. Each metasurface lens unit comprises an upper metal patch, a middle metal patch, a lower metal patch and two dielectric plates between the patches; the upper metal patch and the lower metal patch are respectively three metal grids which are arranged in parallel, the upper-layer metal grid and the lower-layer metal grid are perpendicular to each other, the width of the upper-layer metal grid and the length of the lower-layer metal grid are both w1, the length of the upper-layer metal grid and the length of the lower-layer metal grid are both P, and the distance between the metal grids is both w2; the middle metal patch is a rhombic ring which is formed by metal strips in a surrounding manner and is provided with an acute-angle vertex angle opening, and the two pairs of metal strips parallel to a diagonal line extend from the opening to the center of the rhombic ring. According to the invention, the independent control of the transmission phase and amplitude can be realized, and the requirements of high gain, low side lobe and strong focusing performance of the transmission array antenna are met.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Colour kinescope device
InactiveCN1445812ADynamic voltage reductionElectrode and associated part arrangementsState of artStrong focusing
A color picture tube device with a coaxial electron gun that makes it possible to avoid design difficulties by implementing a technique of applying a dynamic voltage to the OLF lens. The electrode plates in the shape of protrusions are attached to the field correcting electrode plates parallel to each other along the horizontal scanning direction. The field correcting electrode plates are horizontally long and flat plates in which three holes are provided. The shape of the plates is similar to that of the peripheral electrodes. hole. This structure allows the quadrupole lens to be formed by an auxiliary lens having a strong focusing effect in the horizontal direction and a diverging effect in the vertical direction, which can increase the HV difference. As a result, the dynamic voltage can be reduced without the design difficulties of the prior art, which does not have such a ledge-shaped electrode plate.
Owner:PANASONIC CORP
Strong-focusing optical system used for composite machining of laser turning and grinding and machining method
ActiveCN105328331ARealize free conversionSmall sizeLaser beam welding apparatusLight energyLight spot
The invention provides a strong-focusing optical system used for composite machining of laser turning and grinding and a machining method. The strong-focusing optical system comprises a collimating system and a focusing system and is characterized in that the collimating system is composed of three spherical mirrors; the focusing system is a round light spot focusing system composed of three spherical mirrors or a linear light spot focusing system composed of one cylindrical mirror and two spherical mirrors. A single beam of laser emitted by a laser device is focused into a round light spot through the strong-focusing optical system to irradiate the surface of a rotating workpiece, the workpiece rotates according to the specified rotating speed, the laser beam scans in the axial direction according to the specified speed, light energy of the laser beam is converted into heat energy, materials in a focus area on the workpiece are melted, gasified and thrown out, and a shaft part is machined in a turning manner. In order to increase the machining speed and improve the machining precision and the surface quality, the single beam of pulse laser emitted by the laser device is converted into a linear light spot to irradiate the surface of the turned workpiece in a focusing manner, and therefore ultrathin laser grinding is achieved.
Owner:HARBIN ENG UNIV
Mass spectrometry ion extraction device and method
PendingCN114334601AAvoid depositionLow costElectron/ion optical arrangementsStrong focusingMass Spectrometry-Mass Spectrometry
The invention discloses a mass spectrometry ion extraction device and method. The mass spectrometry ion extraction device comprises an ion source, an air curtain cavity, a sampling cavity and an ion optical assembly which are sequentially arranged, wherein the ion source is used for generating ions of an object to be detected; the inlet end of the air curtain cavity is composed of a conical air curtain plate with an air curtain hole, the side wall of the air curtain cavity is provided with a branch for providing air curtain air, a strong focusing electrode assembly is arranged in the air curtain cavity, and a slit is formed between one end, close to the air curtain hole, of the strong focusing electrode assembly and the inner wall of the air curtain plate; the sampling cavity comprises a sampling cone and a high-pressure ion transmission assembly, and a second differential hole is formed in the outlet end of the sampling cavity. According to the invention, the extraction interface is improved, the distance between the air curtain hole and the sampling cone is increased, ions extracted by the air curtain hole are focused by applying a spatial strong focusing electrostatic quadrupole electric field, and the density of an ion group is improved, so that the extraction efficiency of the sampling cone is improved, and the concentration of a solvent ion adduct is reduced.
Owner:谱视科技杭州有限公司
Method and devicefor capturing and manipulating particles through a partially coherent light beam
The invention provides a method and device for capturing and manipulating particles through a partially coherent light beam. The device comprises a special correlation structure, a particle capturing module and an imaging module. The special correlation structure generates the partially coherent light beam to enter the particle capture module, the particle capture module performs strong focusing on the partially coherent light beam, the light beam forms a plurality of stable optical potential traps with different properties near a focal point, the optical potential traps capture particles with different refractive indexes at a plurality of positions at the same time and display the particles on the imaging module. Meanwhile, the particles are manipulated by regulating and controlling a partially coherent light beam construction module.
Owner:SHANDONG NORMAL UNIV
Integrated all-fiber catenary wave field regulator
PendingCN113671718ARealize one-dimensional wave field control methodRealize two-dimensional wave field control methodOptical elementsFiberDouble-clad fiber
The invention provides an integrated all-fiber catenary wave field regulator. The regulator is characterized by consisting of a section of double-clad fiber 2 with a spiral grating 1, a graded index fiber 3 and a fiber end metal film 4; and the double-clad fiber 2 comprises an outer cladding 5, an inner cladding 6 and a fiber core 7, the graded-index fiber 3 comprises a cladding 8 and a fiber core 9, and a catenary micropore array 10 is arranged on the fiber end metal film 4. The regulator has wavelength and polarization regulation and control capability on a wave field, and when incident wavelengths are respectively a circular polarization input light wave 11 and a circular polarization input light wave 15, the regulator respectively outputs a zero-order Bessel beam 14 and a first-order vortex Bessel beam 17; and when a right-hand circular polarization input light wave 111 and a left-hand circular polarization input light wave 112 are incident respectively, the regulator outputs a non-diffraction zero-order Bessel beam 18 and a strong-focusing zero-order Bessel beam 19 respectively. The regulator can be used in the fields of light field regulation and control, photodynamic therapy, light manipulation and the like.
Owner:GUILIN UNIV OF ELECTRONIC TECH
Optical device of flexible implantable neural photoelectrode and its design and fabrication method
ActiveCN111939482BReduce transmission lossImprove coupling efficiencyPhotoelectric discharge tubesLight therapyGratingOptical stimulation
The invention discloses an optical device of a flexible implantable nerve photoelectrode, which is arranged on a flexible polymer substrate and includes: an input grating, a waveguide and an output grating, the input grating is a parallel grating for coupling incident light, and the input of the waveguide The end of the waveguide is coupled to the input grating, the output end of the waveguide is coupled to the output grating, and the output grating is a focusing grating, which is used to couple and focus light on the recording electrode to provide optical stimulation with single-cell resolution. The invention also discloses the design and preparation method of the optical device. The optical device of the flexible implantable neural photoelectrode provided by the present invention provides single-cell resolution optical stimulation and in-situ recording through the design of the waveguide and grating; the small size of the device can reduce implant damage, and it has low loss and high Coupling and strong focusing; its high integration is conducive to the realization of multi-channel, high-density nerve stimulation and recording; the use of flexible polymer substrates can reduce the formation of nerve scars and achieve long-term stable work in vivo.
Owner:SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
Large-momentum-acceptance superconducting rotating frame for proton therapy
PendingCN111249633AReduce weightSmall sizeX-ray/gamma-ray/particle-irradiation therapyQuadrupole fieldShaped beam
The invention discloses a large-momentum-acceptance superconducting rotating frame for proton therapy. The superconducting rotating frame comprises an energy reducer component, a first deflection superconducting magnet component, a second deflection superconducting magnet component and a treatment head component with a pen-shaped beam scanning function; the first deflection superconducting magnetcomponent and the second deflection superconducting magnet component both comprise deflection magnets and focusing magnets, and are both of symmetrical structures; each deflection magnet is a combinedsuperconducting magnet with a dipolar field and an alternating-gradient quadrupole fields; and dispersion elimination is realized in the first deflection superconducting magnet component and the second deflection superconducting magnet component separately, and the maximum value of the dispersion function is suppressed by the strong focusing characteristic of the alternating gradient quadrupole field, so that the superconducting rotating frame has large momentum acceptance. Therefore, the weight and the size of the frame are obviously reduced, and the quench problem caused by rapid magnetic field change of a superconducting magnet is avoided.
Owner:HUAZHONG UNIV OF SCI & TECH
Optical pumping vector light beam solid laser
InactiveCN105024271ASimple preparation processSimple structureOptical resonator shape and constructionActive medium materialResonant cavityManufacturing technology
The invention relates to an optical pumping vector light beam solid laser. Based on the working principle of a solid layer, a solid gain dielectric element coated with a laser reflecting film and a circular conical surface light field returning element form a laser resonant cavity. The circular conical surface light field returning element is built through combining the polarization selection characteristics of a Brewster angle, and serves as a resonant cavity lens. The selection of a polarization state is achieved through the Brewster angle, and a radial polarized vector light beam in a cavity is generated. The strong focusing of the radial polarized vector light beam in the cavity is achieved based on an annular conical curved surface, thereby achieving the output of a longitudinal polarized optical field. The laser is simple in manufacturing technology, is simple in structure, is convenient in construction, is convenient to install and adjust, is high in reliability and flexibility, and is wide in application range. The laser can achieve the output of the longitudinal polarized optical field, can achieve mode selection output in the laser resonant cavity, and is high in quality of an output light beam.
Owner:UNIV OF SHANGHAI FOR SCI & TECH
Colour kinescope device
InactiveCN1276461CImprove effectivenessReduce spherical aberrationElectrode and associated part arrangementsState of artStrong focusing
A color picture tube apparatus having an inline electron gun that allows technology for applying a dynamic voltage to an OLF lens to be implemented, while avoiding design difficulties. Eave-shaped electrode plates are attached, parallel with each other in a horizontal scan direction, to a field-correction electrode plate, which is a horizontally long, flatten plate in which three holes are provided, and whose shape is similar to that of an aperture in a circumferential electrode. This structure allows quadrupole lenses to be formed as auxiliary lenses having strong focusing action horizontally and divergent action vertically, and thus an HV differential can be increased. As a result, it is possible to reduce the dynamic voltage without any of the design difficulties accompanying the prior art, in which eave-shaped electrode plates are not provided.
Owner:PANASONIC CORP
A water immersion ultrasonic flaw detection method for defects in rolled steel
ActiveCN108802191BEnhanced scan signalThe test result is accurateAnalysing solids using sonic/ultrasonic/infrasonic wavesStrong focusingWater immersion
The invention provides a water immersion ultrasonic flaw detection method for rolling steel defects, belonging to the technical field of water immersion ultrasonic nondestructive testing. In the present invention, the thickness of the water layer of each focusing probe is different, the focusing probe is fixed on the water immersion ultrasonic flaw detector by the fixture, and the multiple focusing probes are controlled by software to move together to ensure that each focusing probe can The scanning area of the steel is scanned once, and the scanning results of each focusing probe are displayed on the computer, and then the scanning results of each focusing probe are combined to more accurately analyze whether there is Defect, because the focal points of each focusing probe are distributed in the thickness direction of the rolled steel to be tested, the signal near the focal point is much stronger than other positions of the sound beam, so the scanning signal of the focusing probe can be effectively enhanced by the method of the present invention, Make the detection result more accurate.
Owner:合肥亿米特科技股份有限公司
Particle light manipulation device based on ring-core coaxial helical waveguide fiber
ActiveCN109799571BRealize functionCladded optical fibreRadiation/particle handlingMicro imagingFiber
Owner:GUILIN UNIV OF ELECTRONIC TECH
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