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216 results about "Laser direct writing" patented technology

Optical fiber twinborn controllable vernier hydrogen sensor and detection method

The invention discloses an optical fiber twinning controllable vernier hydrogen sensor and a detection method, and belongs to the technical field of optical fiber sensing, the optical fiber twinning controllable vernier hydrogen sensor comprises a single-mode optical fiber, a femtosecond laser direct writing grating, a Fabry-Perot interferometer and a Pd / WO3 hydrogen sensitive film; the single-mode optical fiber comprises an optical fiber core and an optical fiber cladding, the femtosecond laser direct writing grating is prepared in the optical fiber core, the Fabry-Perot interferometer is composed of a reflecting surface 1 and a reflecting surface 2 which are relatively parallel to each other, the Pd / WO3 hydrogen sensitive film is coated on the inner side of the reflecting surface 2, and the femtosecond laser direct writing grating and the Fabry-Perot interferometer are arranged in series; the optical path of the Fabry-Perot interferometer is modulated through the interaction of the Pd / WO3 hydrogen sensitive film and hydrogen, interference spectrum wavelength drift is triggered, temperature compensation is achieved in combination with the temperature response of the femtosecond laser direct writing grating, and hydrogen concentration sensing is completed. The method is suitable for hydrogen leakage detection in industrial environments, energy equipment and other scenes.
Owner:NORTHEASTERN UNIV AT QINHUANGDAO

Metal grid transparent conductive film and manufacturing method thereof

The invention discloses a metal grid transparent conductive film which sequentially comprises a transparent base material layer, a metal grid layer, a transition layer and a protection layer from bottom to top. The manufacturing method comprises the steps of pretreating the transparent base material, preparing the metal seed layer, performing laser direct writing patterning, performing electroplating thickening to form the metal grid layer, preparing the transition layer and the protective layer, and performing performance test and adjustment. The hexagonal honeycomb grid structure and the arc edge design are adopted, and the problem of metal grid electric field concentration is effectively solved; through the arrangement of the transition layer, the interface bonding force of the metal grid is improved; the protection layer and the transition layer cooperate to improve the corrosion resistance of the film; the problems that an existing transparent conductive material is high in cost, poor in flexibility and insufficient in interface compatibility, and an electrochromic device is concentrated in electric field, short in service life and the like are effectively solved, and the transparent conductive material can be widely applied to building intelligent windows, automobile anti-dazzle rearview mirrors, flexible display panels and other electrochromic devices and has important industrial application value.
Owner:MICRON OPTOELECTRONICS CO LTD

Stepped multi-mode flexible sensor based on laser-induced graphene and preparation method of stepped multi-mode flexible sensor

The invention belongs to the technical field of flexible electronics and sensing, and relates to a stepped multi-mode flexible sensor based on laser-induced graphene and a preparation method of the stepped multi-mode flexible sensor. The sensor comprises a humidity sensitive layer, a pressure sensitive layer, a strain sensitive layer and a temperature sensitive layer which are sequentially stacked in a stepped mode from top to bottom, each sensitive layer comprises a flexible substrate, a laser-induced graphene (LIG) electrode and a connecting area penetrating through the flexible substrate, and the sensitive layers are connected in series through the connecting areas. Through an infrared laser processing method, all the sensitive layers are broken through, all the sensing sensitive layers are communicated, and assembling is carried out. And independent sensing of each physical quantity is realized by leading out a corresponding port on each sensing sensitive layer. According to the stepped structure, spatial isolation is carried out through the flexible substrate, signal crosstalk is reduced, low-cost and high-precision manufacturing is achieved in combination with the laser direct writing process, and the stepped structure is suitable for the fields of medical health monitoring, industrial equipment diagnosis, intelligent robots and the like.
Owner:ZHEJIANG UNIV OF TECH +1

A manganese-based pixelated scintillator array and methods of making and using the same

The application belongs to the field of scintillator material preparation, and particularly relates to a manganese-based pixelated scintillator array and a preparation method and application thereof. The (BuTPP)2MnBr4 scintillator material in a molten state is filled into a quartz glass cavity by capillary action, and a glass scintillator matrix is formed by cooling and quenching; then, in-situ crystallization is realized in the glass scintillator by using femtosecond laser direct writing processing, and a pixelated array is precisely constructed. The in-situ crystallization induced by the femtosecond laser significantly improves the photoluminescence intensity and the radiation luminescence intensity of the material, effectively solves the problems of low luminescence efficiency, high pixelation processing difficulty and poor crystallization controllability of the traditional glass scintillator, and the prepared pixelated scintillator array has stable optical performance and clear pixel boundary, is suitable for X-ray imaging, radiation detection and the like, and has simple preparation process and strong controllability of parameters, thereby providing a new implementation method for the preparation of arrayed X-ray scintillators.
Owner:NANJING UNIV OF POSTS & TELECOMM

High-flux super-resolution laser direct writing device and method based on super-structure surface

The invention discloses a high-flux super-resolution laser direct writing device and method based on a metasurface, and the device employs a single metasurface to achieve the simultaneous shaping of an excitation light array and a suppression light array through wavelength polarization multiplexing, and replaces a complex independent shaping and beam combination light path in a conventional scheme. The system structure is greatly simplified, generated excitation light and suppression light are completely transmitted in a common path after passing through the DMD and are shaped by a single metasurface, the alignment error and relative drift problems of two light beams are eliminated, and the stability of the super-resolution processing effect is ensured.
Owner:ZHEJIANG UNIV +1

A white clover-like surface with ultra-low ice adhesion strength and its preparation method and application

The application provides a white clover surface with super-low ice adhesion strength and a preparation method thereof, which comprises analyzing the relationship between the white clover surface structure and the super-hydrophobic cold resistance; copying the white clover surface structure, and processing periodic micropores on a base material by means of femtosecond laser direct writing; boiling the surface of the periodic micropores; and fluorinating the surface to modify it into a functional surface with super-hydrophobicity. The white clover surface with super-low ice adhesion strength has a micro-nano hierarchical structure, which comprises closely arranged larger micrometer-level periodic pore structures, smaller micrometer-level granular particles dispersedly distributed on the surface of the micropore structures, and densely distributed sub-micrometer-level sheet structures on the surface. The surface has super-hydrophobic low adhesion, the ice adhesion strength is as low as 1.08 kPa, the static icing prolonging time can reach 4 h, the dynamic frost prevention capacity can last for 5 h in a low-temperature and high-humidity environment, and the surface has good wear resistance and reusability.
Owner:SOUTHWEST UNIV OF SCI & TECH SICHUAN TIANFU NEW AREA INNOVATION RES INST +1

A rare earth ion doped lithium niobate micro-ring laser and a preparation method thereof

The application discloses a rare earth ion doped lithium niobate micro-ring laser and a preparation method thereof, and utilizes femtosecond laser direct writing combined with chemical mechanical polishing technology to prepare a micro-ring and a coupling waveguide shape on the surface of a lithium niobate film doped with rare earth ions, and further realizes a micro-ring laser on a lithium niobate sheet. The application can realize low-cost mass production of the micro-ring laser on the sheet, and has important significance in optical communication, photonic integrated circuit, precision measurement and large-scale sensing and the like. Meanwhile, the laser based on the thin film lithium niobate micro-ring can generate multi-mode laser near multiple wave bands, and is a multi-wave channel light source with wide application prospect in optical communication and biosensors.
Owner:EAST CHINA NORMAL UNIV

Preparation method of efficient mass transfer anti-precipitation sea water hydrogen production electrode constructed by femtosecond laser

The invention provides a preparation method of an efficient mass transfer anti-precipitation sea water hydrogen production electrode constructed by femtosecond laser, and relates to the technical field of sea water electrolysis hydrogen production. The method comprises the following steps: carrying out substrate pretreatment on a conductive substrate, periodically preparing a hump microstructure on the surface of the pretreated conductive substrate by adopting a femtosecond laser direct writing technology, and loading a catalytic activity layer on the surface of the hump microstructure substrate to form an integrated electrode. According to the integrated electrode, the catalytic activity and the mass transfer efficiency can be improved under the seawater electrolysis condition, magnesium-calcium precipitation coverage is inhibited, and collaborative optimization of efficient hydrogen production and electrode stability is achieved.
Owner:CHANGCHUN UNIV OF SCI & TECH

Geometric phase metasurface high-throughput laser direct writing system and method

The invention discloses a geometric phase metasurface high-flux laser direct writing system and method, and the system comprises a femtosecond laser, a beam expander, a angular dispersion compensation module, a digital micromirror array, a second 4F system, a spatial light modulator, a fifth lens and an objective lens according to the light advancing direction. Wherein the spatial light modulator is used for performing phase modulation on each unit light spot from the digital micromirror array based on a loaded holographic phase diagram to form a rod-shaped light spot array, and the rod-shaped light spot array forms parallel light transmitted at different angles through the fifth lens and converges at an entrance pupil of the objective lens together. And finally, a parallel direct-writing light spot array is formed in the two-photon photoresist, and geometric phase metasurface unit structure array printing is completed. According to the system, high-flux and high-flexibility direct-writing manufacturing of the geometric phase type metasurface is finally realized.
Owner:ZHEJIANG UNIV +1

A neural network-based laser direct writing gray exposure parameter prediction method

The application discloses a kind of laser direct writing gray exposure parameter prediction methods based on neural network, belong to gray exposure technical field.This method is used to solve the problem of low efficiency caused by relying on a large number of experimental dose test in traditional gray exposure, inaccurate parameter optimization and insufficient accuracy of prediction model.The technical solution is as follows: first, the data of gray and etching depth under different exposure parameters are obtained by experiment to train the forward neural network model;then, the exposure time that makes the predicted depth greater than the target maximum depth is found by fixing the light intensity and using the model;finally, the gray value matched with the target depth is obtained based on the determined exposure parameters.The application can quickly and accurately predict the optimal exposure time, light intensity and gray value according to the target etching depth, thereby eliminating the repeated dose test process.
Owner:SUZHOU LABORATORY

Method for regulating and controlling interface between laser reduction deposition metal and transparent substrate

The invention belongs to the technical field of laser manufacturing, and relates to a method for regulating and controlling an interface between laser reduction deposited metal and a transparent substrate, which comprises the following steps of: coating a precursor material on the surface of the transparent substrate, and irradiating the interface between the precursor material and the transparent substrate by adopting ultrashort pulse laser through the transparent substrate; and the ultra-short pulse laser scans the interface of the precursor material and the transparent substrate for multiple times according to a preset path for laser direct writing, and a patterned metal structure is obtained. The ultra-short pulse laser penetrates through the transparent substrate from the back to irradiate the precursor material / substrate interface, thickness limitation on the precursor material is avoided, and in the multiple laser scanning process, the temperature of the metal / substrate interface exceeds the chemical bond fracture and recombination temperature, so that more chemical bonds are formed on the two sides of the transition layer, and the performance of the transition layer is improved. The chemical bonding degree of a metal / substrate interface is improved, interface regulation and control of the metal and the transparent substrate are achieved, and a patterned metal structure is obtained.
Owner:BEIJING UNIV OF TECH

A strain gauge based on laser direct writing and a preparation method and application thereof

The application relates to a laser direct writing strain gauge and a preparation method and application thereof, and belongs to the technical field of strain measurement and sensors. The strain gauge comprises a carbonizable flexible substrate, a laser direct writing carbon piezoresistive material, an elastomer encapsulation layer and an electrical lead-out structure; the laser direct writing carbon piezoresistive material is obtained by laser direct writing on the carbonizable flexible substrate; the laser direct writing carbon piezoresistive material is supported by a flexible substrate layer left after carbonization; and the laser direct writing carbon piezoresistive material is a linear pattern formed by mutual connection of no less than two carbon dots or a planar pattern formed by arrangement of no less than four carbon dots. The strain gauge simultaneously realizes low temperature coefficient and high strain sensitivity, can be independently used as a self-supporting structure, can be integrated with an external sensing carrier, and is used for strain testing. The strain gauge is suitable for strain measurement requirements under various complex working conditions and has good engineering adaptability and application flexibility.
Owner:SUZHOU UNIV

A preparation method of a laser-induced graphene-based ammonia sensor and the ammonia sensor

ActiveCN117191887BMixed gasMaterials science
The application relates to the technical field of ammonia gas sensors, and discloses a preparation method of a laser-induced graphene-based ammonia gas sensor, which adopts the following technical scheme: a preparation method of a laser-induced graphene-based ammonia gas sensor, comprising the following steps: S1, laser direct writing is performed on the surface of a polyimide film through a laser engraving device to form a set of interdigital electrode patterns on the surface of the polyimide film; S2, a gas-sensitive material is prepared, the gas-sensitive material is mixed and ground with terpineol and glass beads, and then the mixed gas-sensitive material is coated on the treated polyimide film; and S3, the polyimide film obtained in the step S2 is aged at 60-70 DEG C to obtain a flexible ammonia gas sensor. The flexible substrate with interdigital electrodes can be prepared in a low-cost manner.
Owner:FUJIAN JIUCE GAS GRP CO LTD

A near single-mode linearly polarized Raman laser based on step-index multimode fiber

The application discloses a high-power single-mode linear polarization Raman fiber laser based on a multimode optical fiber, and is characterized in that: a Raman gain medium of the laser is a single-clad circularly symmetric step-index distribution large-core multimode optical fiber; a base mode diameter of the step-index large-core multimode optical fiber is more than 65% of a core diameter; a Bragg fiber grating is inscribed in the core of the multimode optical fiber by using a femtosecond laser direct writing technology; a long axis of the grating region is coincided with a base mode field supported by the multimode optical fiber in a radial direction in space and length; the grating forms selective optical feedback only to the base mode in the cavity; a grating region with a difference between the long axis and the short axis forms selective feedback to one polarization state of the base mode; thus, the multimode optical fiber Raman laser effectively suppresses generation of mode instability at a high power level through active mode cleaning, and finally realizes near-diffraction-limited single-mode, high linear polarization and high-power Raman fiber laser output.
Owner:XUZHOU NORMAL UNIVERSITY

A paper-based microfluidic intelligent wound monitoring bandage based on a laser-induced graphene electrode array and a preparation and signal processing method thereof

The application discloses a paper-based microfluidic intelligent wound monitoring bandage based on a laser-induced graphene electrode array and a preparation and signal processing method thereof. The bandage comprises a calcium alginate / zinc oxide antibacterial base, a wax-printed paper-based lateral chromatographic microfluidic channel layer, a CO2 laser direct writing LIG multifunctional electrode array, a colorimetric indication area, an NFC wireless communication module and a silver nanowire electrically controlled drug release module. The LIG electrode is fixed and modified by enzymes to detect uric acid, lactic acid, glucose and pH value respectively; the paper-based colorimetric disc detects bacterial protease and TNF-alpha; the NFC radio frequency field provides energy to realize battery-free operation. The built-in signal processing method comprises temperature compensation, cross interference elimination, multi-parameter fusion infection risk scoring and double-threshold closed-loop drug delivery decision. The preparation process mainly uses laser direct writing, screen printing and ion crosslinking, has low material cost and is green and environmentally friendly, and is suitable for closed-loop monitoring and treatment of chronic wounds at home and in clinic.
Owner:王刚

2.5 D optical waveguide chip and preparation method and application device thereof

The invention relates to a 2.5 D optical waveguide chip and a preparation method and an application device thereof, and belongs to the technical field of integrated photoelectron and optical fiber communication. Aiming at the technical problems that an existing 3D optical waveguide based on a laser direct writing process cannot be manufactured at a wafer level, the production efficiency is low and the cost is high, the invention provides a 2.5 D optical waveguide chip which comprises a substrate and at least two layers of planar optical waveguides which are isolated by a cladding material and each layer is limited to extend in a plane of the planar optical waveguide; the waveguide distribution of the light inlet end face of the chip is matched with the fiber core distribution of the target multi-core optical fiber for coupling alignment, the waveguides of the light outlet end face of the chip are distributed in a step shape, and the waveguides located on different layers have different heights so as to be coupled and aligned with the corresponding optical fiber array distributed in the step shape. The chip is suitable for wafer-level batch manufacturing and is mainly used for forming core optical devices such as a multi-core optical fiber fan-in and fan-out assembly, a multi-core optical fiber optical receiver and a multi-core optical fiber optical transmitter.
Owner:FIBEROUTLETS (WUHAN) TECH CO LTD

A flexible tactile sensor prepared based on a laser direct writing graphene method

The application relates to a flexible tactile sensor prepared by a laser direct writing graphene method and belongs to the technical field of flexible sensors. The upper half of the sensor is a graphene film, the lower half is a silver electrode film, the middle is a TPU film connecting layer, and the bottom encapsulation layer is encapsulated. The graphene film is generated by scratching the surface of a PI film with a 455nm laser, a mask plate pattern designed in advance in CAD is engraved by laser, a silver electrode film is deposited on the PI film by a physical vapor deposition method, then the two are connected in a face-to-face mode through a high-temperature melted TPU film, and a waterproof tactile sensor array is formed after being combined by pp encapsulation. The sensor has wide application potential in the fields of bionic robots, intelligent prostheses and the like. The sensor has the characteristics of high sensitivity, wide detection range, reliable piezoresistive performance and high real-time performance, the preparation process is simple, the cost is low, and the problems of high cost and complexity in the preparation of previous micro-nano structures are solved.
Owner:BEIJING UNIV OF TECH

A scanning control method and system of a laser direct writing device and related device

Embodiments of the present application provide a scanning control method, a control system and related equipment of a laser direct writing device, which are used to improve the precision, efficiency and compatibility of the control program of laser imaging. The method of the embodiments of the present application comprises: acquiring image data of an original grid image, wherein the image data at least comprises position parameters of pixel exposure points in each pixel row; acquiring a scanning strategy selection instruction, wherein the scanning strategy selection instruction indicates a target scanning strategy selected from a plurality of scanning strategies, and each scanning strategy indicates a scanning order of each pixel row; reading the position parameters of the pixel exposure points in each pixel row according to the scanning order in the target scanning strategy, and controlling a laser array to scan a mapping area of each pixel row on a photosensitive coating according to the scanning order in the target scanning strategy, and exposing the positions of the pixel exposure points of each pixel row in the scanning process.
Owner:SHENZHEN ANTELAND TECH CO LTD

Femtosecond laser direct writing equipment (FemtoXLAB)

1. The name of the design product: FemtoX LAB. 2. The use of the design product: It is a laser direct writing equipment, mainly used for processing brittle materials, such as the development and production of glass three-dimensional optical waveguide, glass via, silicon via, etc. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.
Owner:WUXI PHOTONIC CHIP JOINT RES CENT

Wavelength specificity regulation and control device and preparation method thereof, and laser direct writing photoetching system using wavelength specificity regulation and control device

The wavelength specificity regulation and control device comprises a fine tuning structure and an optical fiber, the fine tuning structure is a rectangular square block, the position of the end face of the optical fiber is a half area which shields a fiber core, the thickness of the fine tuning structure meets the generated optical path difference, and a 2 pi phase difference is generated at the wavelength position of excitation light. And a pi phase difference is generated at the suppression light wavelength. According to the preparation method, one end of the optical fiber is immersed in photoresist, and development is carried out after the fine tuning structure is inscribed through the two-photon inscribing module. The wavelength specificity regulation and control device does not modulate the exciting light, keeps Gaussian beam transmission, modulates the suppression light, and modulates the shape of the suppression light into a required suppression light spot. The two light beams are simultaneously transmitted in the device, so that the problem of light beam alignment is avoided, the stability of a light path is improved, and the integration of the system is also improved by using the device.
Owner:HANGZHOU YUZHIQUAN PRECISION INSTR CO LTD

Multilayer stress sensor prepared based on laser direct writing technology and preparation method thereof

The invention discloses a multilayer stress sensor prepared based on a laser direct writing technology and a preparation method thereof, and belongs to the technical field of flexible electronic device preparation. The sensor is in a Y shape, three sensors extend from the center point along three different angles, and the center points of the three sensors are connected with one another. The invention discloses a multilayer stress sensor prepared based on a laser direct writing technology. The multilayer stress sensor is prepared on a doped flexible substrate by adopting the laser direct writing technology. Through a laser direct writing technology based on flexible substrate doping, a strain sensor unit capable of realizing plane strain direction identification is prepared. Finite element simulation and mechanical test prove that the sensing unit has the capability of realizing strain direction identification on a plane. The multilayer stress sensor prepared based on the laser direct writing technology and the preparation method thereof can realize preparation of a large-scale sensing unit array compatible with a complex three-dimensional curved surface; the method has a wide application prospect in the fields of aerospace, building structure health monitoring and the like.
Owner:NENGXIN (CHANGZHOU) ELECTRONIC TECH CO LTD

FBG (fiber bragg grating) longitudinal line-by-line cold processing preparation method based on femtosecond laser direct writing

The invention relates to the technical field of fiber bragg grating preparation, in particular to a method for preparing a fiber bragg grating through longitudinal line-by-line cold machining based on femtosecond laser direct writing, which comprises the following steps of: S10, controlling a femtosecond laser spot to move point by point along the axial direction of an optical fiber by taking a grating period as a step length, and applying a laser pulse at a corresponding position of each grating period, a local refractive index modulation area is formed; the at least m local refractive index modulation areas are periodically arranged in the axial direction of the optical fiber to form a longitudinal modulation track; s20, the femtosecond laser spot is controlled to move by a preset distance in the first direction perpendicular to the axial direction of the optical fiber; and the steps S10 and S20 are repeated until n longitudinal modulation tracks are formed, so that the local refractive index modulation areas located in the same cross section of the optical fiber can form a refractive index modulation plane, m refractive index modulation planes are obtained, and processing of the optical fiber grating is completed. Energy relaxation of the optical fiber material is facilitated, and a refractive index modulation structure is stably formed.
Owner:HARBIN ENG UNIV +1

AlBN nanocrystalline film and preparation method thereof

The invention provides an AlBN nanocrystalline film and a preparation method thereof. The preparation method comprises the following steps: forming a ternary amorphous AlBN film on the surface of a substrate; the substrate with the ternary amorphous AlBN thin film formed on the surface is placed in the visual field of an electron microscope or a microscope equipped with a laser direct writing system, electron beams of the electron microscope or laser beams of the laser direct writing system are adopted to irradiate the ternary amorphous AlBN thin film so as to induce crystallization of the ternary amorphous AlBN thin film, and the AlBN nanocrystalline thin film is generated. According to the method, the ternary amorphous AlBN thin film can be induced to be converted into the AlBN nanocrystalline thin film, the crystallization range can be accurately controlled through the observation performance of an electron microscope and a laser direct writing microscope, in-situ research can be conducted on the crystallization process in time, and the method integrates preparation, observation and research.
Owner:SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI

Long-wave infrared band 8-12 [mu] m narrow-band polarization-independent notch filter and method

The invention belongs to the technical field of infrared optical devices, and particularly relates to a long-wave infrared band 8-12 [mu] m narrow-band polarization-independent notch filter and a method. The long-wave infrared band 8-12 [mu] m narrow-band polarization-independent notch filter comprises a polished ZnSe substrate, a Ge zero-contrast grating layer, a ZnSe anti-reflection grating layer and two double-layer grating structures, and the two double-layer grating structures are in orthogonal cascade connection and used for achieving the polarization-independent characteristic. The preparation of the optical filter is completed through the six steps of substrate pretreatment, Ge film deposition through electron beam evaporation, grating pattern formation through laser direct writing gray exposure, Ge grating structure preparation through inductive coupling plasma etching, and ZnSe anti-reflection grating layer and orthogonal cascade double-layer grating structure deposition. The preparation method adopts the processes of laser direct writing, ICP etching, electron beam evaporation coating and the like, solves the problems of time consumption of traditional multilayer film deposition, polarization sensitivity of an existing GMR device and the like, and is suitable for the field of long-wave infrared photon and optoelectronic devices.
Owner:XIAN NORTH ELECTRO OPTIC TECH DEFENSE

Method for constructing nucleation gradient multi-element structure spliced surface based on femtosecond laser direct writing technology

PendingCN121928215ALaser beam welding apparatusSurface engineeringEvaporation heat transfer
The invention provides a construction method of a nucleation gradient multi-element structure spliced surface based on a femtosecond laser direct writing technology, and relates to the technical field of boiling heat transfer enhanced surface engineering. Femtosecond laser is adopted to conduct cross scanning on a metal substrate to prepare a dot matrix cavity with the automatic liquid supply capacity, and the opening size of the cavity and the bubble production behavior are controlled by adjusting the number of cross lines; preparing a laser-induced periodic structure LIPSS with different roughness on the external surface of the cavity so as to strengthen hydrophilicity; capillary grooves with low nucleation activity are processed in the center of a lattice grid to serve as gap channels, and gas-liquid channel separation and ordered bubble separation are achieved. The surface can cooperatively regulate and control the nucleation density, wettability and gas-liquid separation path, and meanwhile, the boiling heat transfer coefficient and the critical heat flux density are improved.
Owner:CHANGCHUN UNIV OF SCI & TECH

Laser direct writing system, method and device, and computer equipment

The application relates to a laser direct writing system writing method and device and computer equipment. The laser direct writing system comprises an image sensing module, a galvanometer and a displacement table. The method comprises the following steps: determining a first relationship between a first distance of displacement table movement and a second distance of image sensing module pixel point corresponding movement; determining a second relationship between the galvanometer voltage and the writing length based on the first relationship and a preset coefficient; and writing a to-be-written file based on the second relationship. According to the application, the second relationship between the galvanometer voltage and the writing length is determined, the optimal system parameter in the current writing environment can be directly determined before writing, the galvanometer voltage is accurately controlled according to the length of the required writing, the accuracy of the actual writing length is effectively improved, the splicing misalignment problem possibly existing in multi-view field writing is solved, the writing accuracy can be effectively improved in the application scene of single-view field writing or large-area writing, and the writing success rate is further improved.
Owner:ZHEJIANG LAB +1

Intelligent ring and preparation method thereof

PendingCN122642660AFemto second laserLight beam
The application discloses an intelligent ring and a preparation method thereof, and relates to the field of wearable smart devices.The application discloses an intelligent ring, which comprises a ring inner ring, a ring outer ring, a light source assembly, a detector assembly and a diffractive optical element which are coaxially connected; the diffractive optical element is formed with a volume diffractive optical modulation structure inside a transparent optical base material of the ring outer ring through a femtosecond laser direct writing process; the diffractive optical element and the ring outer ring are integrated into a whole structure without a physical interface; the ring inner ring is provided with an optical through hole which penetrates along a radial direction; the optical through hole is coaxially aligned with an outgoing light path of the light source assembly and an incoming light path of the detector assembly, respectively; the diffractive optical element is arranged along the radial direction of the optical through hole; the ring outer ring is an annular structure which is integrally formed with the transparent optical base material; the detection light emitted by the light source assembly is incident on the diffractive optical element through the optical through hole to complete optical modulation, and the modulated light beam is returned along the original light path after being reflected by a target, and is received by the detector assembly through the optical through hole.
Owner:SHENZHEN XINGUODU JISUAN TECHNOLOGY CO LTD

Double-closed-loop feedback system and laser direct writing equipment

The invention relates to the technical field of micro-nano structure preparation, in particular to a double-closed-loop feedback system and laser direct writing equipment, and the double-closed-loop feedback system is characterized in that a laser interferometer obtains a first distance between a first laser head and a sample table and a second distance between a second laser head and an exposure module; the grating ruler positioning module obtains the movement speed of the air floatation movement device; the first controller sends an expected position signal; differentiating the first distance and the second distance to obtain a position feedback signal, and comparing the position feedback signal with an expected position signal to obtain a first comparison signal; filtering and amplifying the first comparison signal to obtain a first processing signal, adding the first processing signal with an expected position signal to obtain an adjustment position signal, performing a differential link, comparing the adjustment position signal with a motion speed to obtain a second comparison signal, and performing filtering and proportional integration to obtain a second processing signal; the first controller controls the air floatation movement device to move by using the second processing signal; according to the scheme, in the preparation process of the mother set, smaller line width and higher precision are achieved.
Owner:ZHONGCHAO SPECIAL SECURITY TECH +1

Method for preparing spectrum continuously adjustable perovskite-polymer composite film by femtosecond laser direct writing and application thereof

PendingCN122641246AHeterojunctionComposite film
The application discloses a method for preparing a spectrum continuously adjustable perovskite-polymer composite film by femtosecond laser direct writing and application. The method comprises the following steps: preparing a perovskite precursor solution and coating to form a uniform wet film, and performing heating annealing under an inert atmosphere to obtain a perovskite precursor composite film; a femtosecond laser is used to perform focusing scanning in a line scanning mode, a spatial overlap is controlled to form a continuous and uniform heat field by adjacent pulses, perovskite nanocrystal growth is induced, and a perovskite-polymer composite film with continuously adjustable emission spectrum is obtained. Based on the quantum size effect of a single halogen system or the ion exchange mechanism of a mixed halogen system, the application realizes, for the first time, sub-nanometer precision continuous spectrum tuning in a visible light band in the composite film, and can directly write a high-resolution 2D or 3D light-emitting pattern in the film, thereby fundamentally eliminating spectrum crosstalk caused by a heterojunction, and providing a new technical platform for full-color display, information encryption and flexible optoelectronic devices.
Owner:ZHEJIANG UNIV

Photoelectric co-packaging CPO scheme based on glass through hole adapter plate

The invention discloses a Co-Package Optics (Co-Package Optics) scheme based on a glass through hole adapter plate. The Co-Package Optics scheme comprises the glass through hole adapter plate and a laser direct writing optical waveguide. The invention further discloses an implementation method based on the laser direct writing optical waveguide. According to the CPO optical engine, the laser direct writing optical waveguide is arranged on the glass substrate and is matched with the adapter plate based on the TGV glass through hole, so that the reliability of the whole CPO optical engine is improved, the assembly production time of a user for optical path coupling is saved, and the overall product cost is reduced.
Owner:深圳市锋仪科技有限公司 +1