26 results about "Photoablation" patented technology

The invention provides a method for improving passivation contact performance of a p region of a TBC battery, which comprises the following steps of: pretreating an n-type monocrystalline silicon wafer, depositing a SiO2 layer and boron (B) doped polycrystalline silicon (poly-Si), etching, performing laser ablation and the like, then depositing phosphorus (P) doped poly-Si, and finally depositing a passivation and anti-reflection layer and preparing a metal electrode. A tunneling oxide layer and boron in-situ doped polycrystalline silicon are deposited in a p region by adopting an ultra-low temperature plasma enhanced chemical deposition (PECVD) mode, the reaction of SiH4 and N2O is introduced to improve the deposition effect of the oxide layer at low temperature, the compactness of a film layer at low temperature is ensured to improve the separation of B on a SiO2 / c-Si interface, and the passivation performance is improved; b doping poly-Si is adopted in the p region, meanwhile, processing is matched with a nanosecond laser, non-equilibrium doping of the B to the poly-Si is achieved, the ultrahigh doping concentration is obtained, the p region passivation performance of the TBC is improved, and then the open-circuit voltage and the conversion efficiency of the TBC battery are finally improved.

An optical fiber combining-coupled ultraviolet laser ablation system, comprising a laser (1), a light homogenizing assembly (2), and an optical fiber combining assembly (3). The laser (1) is used for emitting laser light. The light homogenizing assembly (2) is arranged on an emergent light path of the laser light. The optical fiber combining assembly (3) is arranged on an emergent light path of the light homogenizing assembly (2). The light homogenizing assembly (2) is used for performing beam flat-top shaping and beam superposition on the laser light to obtain a target light spot. The optical fiber combining assembly (3) is used for performing multi-beam transmission on the target light spot, so that laser ablation can be efficiently and stably achieved.

The utility model provides a laser ablation device which comprises a first laser light source used for emitting treatment laser; the optical splitter is arranged at the output end of the first laser light source and is used for splitting the treatment laser into multiple paths of split laser; wherein the branch lasers are arranged in rows and columns; the optical modulator is arranged at the output end of the optical splitter and is used for performing independent power regulation and control on each branch laser; the optical fiber coupler is arranged at the output end of the optical modulator and is used for coupling the branch lasers into the optical fiber branches of the optical fiber array one by one; the optical fiber array is connected between the optical fiber coupler and the focusing micro-lens array, and each optical fiber branch corresponds to one focusing micro-lens of the focusing micro-lens array; and the focusing microlens array is used for focusing the split laser onto the diseased tissue in space through focusing microlenses for ablation treatment. The technical scheme can be used for ablation treatment of various irregular pathological tissues, and damage to surrounding healthy tissues is avoided.

There is provided a process for treatment of rhinitis by diode laser ablation of the branches of the posterior nasal nerve. The diode laser delivery device with elongated fiber optic with its fiber tip is inserted through a patient's nostril and has the length, flexibility and a curvature to reach both above and under the patient's middle turbinate for treatment of both branches of the posterior nasal nerves. Skin and tissue temperature is raised to approximately 60-70° C. with the process. A control knob on the laser delivery device moves from a first to a second position to move a camera attached to the laser delivery device. The fiber optic includes a distal fiber tip extending from a malleable sheath connected to the body for delivering light energy to a treatment area.

The utility model discloses a rotatable display screen and laser ablation equipment, the rotatable display screen comprises a first display screen, a second display screen and a connecting assembly, the connecting assembly comprises a supporting rod and a rotating part, and the rotating part is arranged on the supporting rod so as to rotate around the supporting rod; the first display screen and the second display screen are connected to the two ends of the rotating component respectively, so that the rotating component drives the first display screen and the second display screen to rotate. According to the scheme, the height and / or angle of the display screen can be adjusted according to needs.

Devices, systems, and methods to generate a plan for an interstitial laser ablation procedure are disclosed. The systems may be configured as an interstitial optical mapping system including a catheter, an emitter optical fiber, an imaging optical fiber, a light source, and a processing unit. The emitter optical fiber and the imaging optical fiber are used to interstitially image a fluorescent dye associated with a tumor, including the tumor margin, at discrete imaging positions along a length of the catheter. The processor calculates a location of the fluorescent dye at each discrete position and creates an optical map representing the tumor. The optical map is used to generate an interstitial laser ablation plan that includes laser fiber pull-back positions.

A laser ablation method includes: determining a corresponding laser ablation mode based on real-time lesion region information at a first time; obtaining real-time lesion region information at a (i+1)th time; determining whether a conformity index between the real-time lesion region information at the (i+1)th time and expected lesion region information after an i-th laser ablation exceeds a first set threshold, to determine a (i+1)th laser ablation mode or end the laser ablation.

The application provides a laser ablation assembly, comprising an ablation optical fiber and a cooling sleeve; the ablation optical fiber comprises a light-guiding optical fiber and an ablation tip; the cooling sleeve comprises a base, an inner tube and an outer tube, two communication structures are arranged in the base; a first support structure is arranged between the outer tube and the inner tube, a second support structure is arranged on the inner side of the inner tube, the distal end of the outer tube is a blind end, a space between the outer tube and the inner tube forms a first channel, a space between the inner tube and the optical fiber forms a second channel, the first channel and the second channel are in fluid communication at the distal end; the first channel is in fluid communication with one of the communication structures at the proximal end, and the second channel is in fluid communication with the other communication structure at the proximal end.

The invention discloses a railway overhead line system floating object cleaning device which comprises a turnover driving part detachably installed on a train or a lifting type rail travelling crane or an overhead line system working vehicle, the output end of the turnover driving part is connected with a mounting base, and a first linear sliding table capable of transversely moving along a rail is assembled on the mounting base; and a visual sensor, a laser ablation piece and an airflow type impurity removal mechanism are mounted on the first linear sliding table. According to the device, the cleaning efficiency of the light floating objects can be effectively improved, the situation that the overhead line system is damaged is avoided, and the failure rate of the overhead line system caused by the light floating objects is reduced. The device is suitable for quickly removing hanging objects such as plastic films, balloons and woven bags on the railway contact net.

The invention discloses a composite ablation experiment platform and an application method thereof. The composite ablation experiment platform comprises a microwave ablation module, a laser ablation module, a monitoring device, an experiment table and a support. The ablation module can move on the X axis, the Y axis and the Z axis on the support so as to adapt to samples of different sizes and shapes, the monitoring device can monitor the ablation process in real time, and accurate control over ablation parameters and experiment safety are guaranteed. The application method comprises the following steps: placing a to-be-processed experimental material on an experiment table, selecting the pulse width and power of laser, moving a laser table and adjusting the laser table to a proper angle, selecting the wavelength and power of microwave, moving a microwave table and adjusting the microwave table to a proper angle; and performing ablation. According to the platform, laser ablation and microwave ablation can be independently or jointly applied, the platform is used for research on ablation and heat effect of biological tissues, the experiment efficiency of the two ablation technologies is improved, convenience and adaptability are improved, and operation is easy.

This invention discloses a fiber-optic bundled ultraviolet laser ablation system, relating to the field of medical devices. The system includes a laser, a beam homogenizing component, and a fiber-optic bundled component. The laser emits laser light; the beam homogenizing component is disposed on the output optical path of the laser; the fiber-optic bundled component is disposed on the output optical path of the beam homogenizing component; the beam homogenizing component performs beam flat-top shaping and beam superposition on the laser to obtain a target spot; the fiber-optic bundled component performs multi-beam transmission of the target spot. This invention can achieve laser ablation efficiently and stably.

The present invention discloses a pulse laser ablation system, comprising a first light source, a first light path homogenization system, an ablation catheter and an OCT imaging system, wherein the first light source is used to generate an initial light beam; the light path homogenization system is used to homogenize and shape the initial light beam into a light beam with uniform energy distribution; the beam combining and focusing system is used to combine the homogenized light beam of the light path homogenization system, and focus and couple it to the ablation catheter; the ablation catheter and the OCT imaging system cooperate to treat pathology; the femtosecond has the narrowest pulse width of all types of lasers, and its peak power is the highest under the same single pulse energy. The ultrashort pulse it generates has an extremely short action time with the material, and will not cause thermal effects on the surrounding materials, and has better processing effect and processing efficiency; an optical coherence tomography probe is added to monitor the laser ablation process in real time, and the real-time feedback signal of the lesion can also provide a basis for parameter setting for further treatment.

The invention provides an optical system for performing imaging, stimulation and laser ablation on a neuron culture, which comprises a fluorescence imaging module, the optical genetic stimulation module comprises a first light source, a first optical filter, a total reflection prism, digital micromirror equipment, a first dichroscope, a first lens, a second dichroscope and an objective lens which are arranged in sequence; the fluorescence imaging module comprises a second light source, a second optical filter, a first lens, a first plane mirror, a lens cone lens, a third optical filter and a camera; the patterned laser ablation module comprises a femtosecond laser, a half-wave plate, a polarization beam splitter, a spatial light modulator and a third dichroscope, and light emitted by the femtosecond laser is subjected to beam shrinkage through a second dichroscope and an objective lens of the optical genetic stimulation module to ablate neurons on a sample.

A method and system for additive manufacturing is disclosed. In one example, the method includes the steps of: (a) positioning a foil layer on a substrate, (b) laser welding the foil layer to the substrate, (c) laser ablating the foil layer using a pulsed laser beam to remove at least a portion of the foil layer, the pulsed laser beam including optical pulses having a pulse duration in the range of 0.5 picoseconds (ps) to 10 ps inclusive, and (d) repeating steps (a)-(c) until the 3D part is completed.

The utility model relates to an experimental device for comparing laser ablation efficiency. The experimental device comprises a seat body, a slice placing table and a positioning mounting assembly, wherein the slice placing table is arranged on the seat body, and slice tissues are placed on the slice placing table. The positioning installation assembly comprises a positioning sleeve and a first locking piece, the positioning sleeve is used for allowing the laser optical fiber to penetrate and be installed, the first locking piece is in threaded connection with the positioning sleeve, the end of the first locking piece penetrates into the positioning sleeve, and the first locking piece is used for tightly pressing the laser optical fiber. And the positioning sleeve is positioned above the slice placing table. When the laser ablation efficiency of the kidney tissue is observed and compared, the laser fiber needs to be positioned and installed in advance. The utility model provides an experimental device for comparing laser ablation efficiency, which can be used by medical staff to perform experimental comparison on tissues so as to quantify and compare tissue damage effects of different laser technologies in lithotripsy, and is of great significance for guiding clinical practice and optimizing treatment schemes.

A laser ablation system is disclosed. The laser system comprises a laser cavity; a gain medium; a pump; a scanner; and a controller configured to: receive a system pulse frequency; receiving a desired pulse frequency; calculating the number of points to be included in the grid based on the system pulse frequency and the desired pulse frequency, where each point corresponds to the position of the pulse; receiving at least one of a size of the treatment region, a shape of the treatment region, and a desired pulse density; based on the size of the received treatment area, the shape of the treatment area and the required pulse density, determining the number of grids required for covering the treatment area and the position of a pulse in each grid; and control the pump and the scanner to provide laser pulses to all locations in each grid.

The application relates to a back contact solar cell manufacturing method, which comprises the following steps: dividing a second main surface of a semiconductor substrate into a first semiconductor area and a second semiconductor area; sequentially forming a first conductive type film layer, a first insulating film layer and a laser absorption sacrifice layer on the second main surface of the semiconductor substrate; the laser absorption sacrifice layer comprises a silicon-based laser absorption film layer, a second insulating film layer and a protective film layer which are sequentially formed on the first insulating film layer; removing part of the film layer of the laser absorption sacrifice layer on the second semiconductor area by using a first laser to expose the second semiconductor area by using a laser exposure ablation process; sequentially removing the laser absorption sacrifice layer, the first insulating film layer and the first conductive type film layer remaining in the first laser exposure area by using a chemical etching process to form an opening of the second semiconductor area; and then performing chemical cleaning to expose the silicon-based laser absorption film layer of the first semiconductor area. The application aims to ensure production efficiency and prevent the problem of heterojunction film thermal decay.

It provides moisture level adjustment for ophthalmic laser ablation surgery. [Solution] In a particular embodiment, the ophthalmic laser ablation system includes a laser device, a fluid removal device, and a computer. The laser device directs laser radiation towards the eye as multiple shots to cut the eye tissue according to a treatment pattern. The fluid removal device removes fluid from the surface of the eye tissue. The computer identifies a moisture retention procedure, instructs the fluid removal device to remove fluid from the surface of the tissue at a certain location in the eye according to the moisture retention procedure, and instructs the laser device to cut the tissue at that location in the eye according to the treatment pattern.

The present application discloses a laser ablation device, which includes a first optical fiber and crystalline silicon. One end of the first optical fiber is docked to the output end of a laser light source, and the other end is docked to the crystalline silicon to form an ablation probe. When the ablation probe enters the lesion area, the crystalline silicon can convert the light transmitted by the second end of the first optical fiber into heat energy. Since the crystalline silicon has penetrated into the lesion area, the converted heat energy can be conducted to the lesion tissue. The ablation probe can withstand high temperatures, with a maximum temperature reaching over one thousand degrees Celsius, and can accumulate relatively high heat to raise the temperature of the lesion tissue and perform laser ablation on the lesion tissue. The temperature of the crystalline silicon is directly conducted to the lesion tissue in the way that the crystalline silicon contacts the lesion tissue, and the lesion ablation efficiency and the lesion ablation effect are not affected by light scattering. The heat can be quickly transferred to the deep lesion tissue to achieve ablation. It can not only achieve the expected ablation target for the lesion tissue, but also greatly reduce the risk of damage to healthy tissues.

The invention discloses a laser ablation device which comprises a first optical fiber and crystalline silicon. One end of the first optical fiber is butted with the output end of the laser light source, and the other end is butted with the crystalline silicon to form an ablation probe. The ablation probe enters a focus area, and then the crystalline silicon can convert light transmitted by the second end of the first optical fiber into heat energy. As the crystalline silicon is probed into a focus area, heat energy obtained through conversion can be conducted to focus tissue, the ablation probe can resist high temperature, the highest temperature can reach more than one thousand DEG C, high heat can be gathered to heat the focus tissue, and laser ablation is carried out on the focus tissue. The temperature of the crystalline silicon is directly conducted to the focus tissue in the mode that the crystalline silicon makes contact with the focus tissue, and the focus ablation efficiency and the focus ablation effect are not affected by light scattering. And heat can be quickly transferred to deep focus tissues to realize ablation. The expected ablation target of focus tissue can be achieved, and the damage risk of healthy tissue is greatly reduced.

The invention provides a system and a method for ablation of dental hard tissue through adjustable annular water mist mediated laser. The system comprises a laser, a water supply system, a double-path gas supply system and a waste liquid recovery system. The nozzle is characterized by being provided with a coaxial three-layer nozzle which is composed of an outer-layer air cavity, a middle-layer water pipe and an inner-layer air cavity in sequence from outside to inside; the outer-layer air cavity and the middle-layer water pipe are sealed by a first light-transmitting window, and the middle-layer water pipe and the inner-layer air cavity are sealed by a second light-transmitting window; micro-pores are formed in the center of the first light-transmitting window; a central water hole is formed in the center of the second light-transmitting window; a laser beam sequentially penetrates through the two light-transmitting windows along the axis of the nozzle. By independently adjusting the inner-layer air pressure (0.1-1 MPa), the water pressure (0.2-1 MPa) and the outer-layer air pressure (0.05-1 MPa), annular water mist with the controllable geometric dimension can be formed at the front end of the nozzle, laser is focused in a central dry air column area to achieve high-precision ablation, and meanwhile the annular water mist cools surrounding tissues. The problems of low cooling efficiency, large laser scattering loss and deep heat damage in existing water mist-assisted laser ablation are solved, and the water mist-assisted laser ablation device is suitable for dental minimally invasive surgeries such as decayed tooth hole preparation and root canal cleaning.

The present invention discloses a state detection system for a laser ablation device and the laser ablation device. The laser ablation device includes a laser system, and the state detection system includes: a detection unit, which includes a voltage sensor for measuring the input voltage of the electro-optical conversion module of the laser system, a current sensor for measuring the output current of the driving module of the laser system, and an efficiency sensor for measuring the electro-optical conversion efficiency of the electro-optical conversion module; a control unit, which can determine whether there is an abnormality in at least one of the electro-optical conversion module, the driving module, and the optical transmission component based on the detection results of the voltage sensor, the current sensor, and the efficiency sensor; and a prompt unit, which is connected to the control unit and is used to provide an abnormality prompt. The state detection system can at least promptly prompt a doctor if there is an abnormality in at least one of the electro-optical conversion module, the driving module, and the optical transmission component.

Provided is a vertical double-pulse laser ablation cell and a use method thereof. A femtosecond laser window is formed in an upper end face of the main housing. The main housing is internally provided an infrared laser channel and a CCD image acquisition channel, which pass through a sample chamber, and a reaction gas channel, a carrier gas channel and a sample gas outlet channel, which communicate with the sample chamber. A spectral interface communicating with the sample chamber is obliquely formed in an upper end of an outer wall of the main housing. Both ends of the infrared laser channel, both ends of the CCD image acquisition channel, one end of the reaction gas channel, one end of the carrier gas channel, one end of the sample gas outlet channel and one end of the spectral interface are located on different outer walls of the main housing.

In certain embodiments, an ophthalmic laser ablation system comprises a laser device, liquid remover, and computer. The laser device directs laser radiation towards an eye as a plurality of shots to ablate tissue of the eye according to a treatment pattern. The liquid remover removes liquid from a surface of the tissue of the eye. The computer: determines a moisture maintenance procedure; instructs the liquid remover to remove the liquid from the surface of the tissue at a location of the eye according to the moisture maintenance procedure; and instructs the laser device to ablate the tissue at the location of the eye according to the treatment pattern.

The invention relates to the technical field of medical laser ablation, and discloses a high-energy space-time coupling laser device and an application method, and the device comprises a pulse delay control unit which is used for generating a plurality of time sequence electric signals; the laser generation unit comprises a plurality of laser subunits which are connected in parallel, each laser subunit receives a time sequence electric signal which is in one-to-one correspondence, and the laser subunits are used for generating corresponding preset pulse laser according to the time sequence electric signal and the time sequence; and the laser synthesis unit is used for receiving the preset pulse laser sent by the laser subunit, performing light beam coupling on the multiple beams of preset pulse laser in space and time and then outputting the multiple beams of preset pulse laser. By means of the high-energy space-time coupling laser device, high-energy laser can be generated, the requirement for arbitrary configuration of laser output energy can be met through parallel connection of the multiple laser subunits, the problem that pulse energy improvement of a high-energy ultraviolet nanosecond laser is limited is solved, and medical application of laser ablation is met.

The invention discloses a visual optical fiber ablation system which comprises an illumination ablation catheter channel, an imaging channel and a working channel. A light guide ablation optical fiber is arranged in the illumination ablation catheter channel, the illumination ablation catheter channel is provided with an illumination white light / ablation laser interface, illumination white light and ablation laser share the same light path, the illumination white light / ablation laser interface is connected with a tunable filter, and the tunable filter is connected with a light source through the light guide optical fiber; the imaging channel is located between the inner wall of the bright ablation catheter channel and the outer wall of the working channel, a plurality of image transmitting optical fiber bundles are arranged in the imaging channel, the front ends of the image transmitting optical fiber bundles are connected with the objective lens, and the rear ends of the image transmitting optical fiber bundles are connected with the imaging platform. The system has the technical effects and advantages that accurate visual control in the ultraviolet laser ablation operation process can be realized by transmitting images through the optical fiber image transmitting bundle, and the ablation efficiency is hardly influenced. Illumination white light and ablation laser share the same light path, the structural design is more reasonable, and the machining difficulty is reduced.