14 results about "Photoablation" patented technology

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.

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 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 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.

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.