35 results about "Ablative laser" patented technology

Devices, systems, and methods for treating atherosclerotic lesions and other disease states, particularly for treatment of vulnerable plaques, can incorporate optical coherence tomography or other imaging techniques which allow a structure and location of an eccentric plaque to be characterized. Remodeling and/or ablative laser energy can then be selectively and automatically directed to the appropriate plaque structures, often without imposing mechanical trauma to the entire circumference of the lumen wall.

Systems and surgical techniques for presbyopia correction by laser removal of the sclera tissue are disclosed. The disclosed preferred embodiments of the system consists of a beam spot controller, a fiber delivery unit and a fiber tip. The basic laser including UV lasers and infrared lasers having wavelength ranges of (0.15-0.36) microns and (1.9-3.2) microns and diode lasers of about 0.98, 1.5 and 1.9 microns. Presbyopia is treated by a system which uses an ablative laser to ablate the sclera tissue outside the limbus to increase the accommodation of the ciliary body of the eye. The sclera tissue may be ablated by the laser with or without the conjunctiva layer open.

Exemplary embodiments of the present disclosure provide method and apparatus for facilitating stretching of a bio-logical tissue by forming a plurality of micro-slits in the tissue. Each micro-slit can be less than about 2 mm or less than about 1.5 mm long, or even less than about 1 mm, such that small gaps that can heal quickly can be formed when the tissue is stretched. The micro-slits can be formed using a plurality of cutting arrangements or an ablative laser. The micro-slits can be formed in various patterns, including staggered rows, circular or spiral patterns, or random patterns.

The present invention is a method for promoting faster wound healing and alleviating pain during and after various dermatology-related treatments. The method comprises using low level laser therapy in conjunction with dermatological treatments including intense pulsed light, radio frequency, dermabrasion, microdermabrasion, chemabrasion, chemical peels, ablative lasers, and cryogenics.

Presbyopia is treated by a method which uses ablative lasers to ablate the sclera tissue and increase the accommodation of the ciliary body. Tissue bleeding is prevented by an ablative laser having a wavelength of between 0.15 and 3.2 micron. A scanning system is proposed to perform various patterns on the sclera area of the cornea to treat presbyopia and to prevent other eye disorder such as glaucoma. Laser parameters are determined for accurate sclera expansion.

REEXAMINATION RESULTS

The questions raised in reexamination request no. 90/006,090, filed Aug. 22, 2001, have been considered and the results thereof are reflected in this reissue patent which constitutes the reexamination certificate required by 35 U.S.C. 307 as provided in 37 CFR 1.570(e), for ex parte reexaminations, or the reexamination certificate required by 35 U.S.C. 316 as provided in 37 CFR 1.997(e) for inter partes reexaminations.

A method and surgical technique for corneal reshaping and for presbyopia correction are provided. The preferred embodiments of the system consists of a scanner, a beam spot controller and coupling fibers and the basic laser having a wavelength of (190-310) nm, (0.5-3.2) microns and (5.6-6.2) microns and a pulse duration of about (10-150) nanoseconds, (10-500) microseconds and true continuous wave. New mid-infrared gas lasers are provided for the corneal reshaping procedures. Presbyopia is treated by a method which uses ablative laser to ablate the sclera tissue and increase the accommodation of the ciliary body. The tissue bleeding is prevented by a dual-beam system having ablative and coagulation lasers. The preferred embodiments include short pulse ablative lasers (pulse duration less than 200 microseconds) with wavelength range of (0.15-3.2) microns and the long pulse (longer than 200 microseconds) coagulative lasers at (0.5-10.6) microns. Compact diode lasers of (980-2100) nm and diode-pumped solid state laser at about 2.9 microns for radial ablation patterns on the sclera ciliary body of a cornea are also disclosed for presbyopia correction using the mechanism of sclera expansion.

The invention discloses a two-dimensional laser spiral cleaning method. The method is characterized in that a laser cleaning system involves two orthogonal deflection digital galvanometer motors; after passing through an optical isolation system and a collimating system in sequence, a laser is sequentially emitted on reflecting mirrors on shafts of the two orthogonal deflection digital galvanometer motors; after secondary reflection, a field lens restrain the laser to be focused in a two-dimensional plane to scan and ablate stains on the surface of a target material substrate; the interface protocol of the two digital galvanometer motors is XY2-100; and the two digital galvanometer motors are independently controlled. According to the two-dimensional laser spiral cleaning method, for any point in the cleaning area, compared with performing ablating line-by-line, the laser is returned to the vicinity of the point after passing through the outer ring according to a spiral filling path, the area of the point obtains cooling time, and the laser heat accumulation effect is weakened; and the line-by-line scanning speed is the speed of the single galvanometer motor, the spiral scanning speed is the speed vector sum of the two motors, so that compared with a line-by-line scanning mode, laser spiral cleaning is more uniform in effect and higher in cleaning efficiency.

The present invention relates to a method for the spectral analysis of a metal coating layer deposited on the surface of a steel strip (1), characterised by the following steps: said strip is moved along an arc of the outer surface (813) of a rotating roller (8) with a cylindrical wall guiding the strip by contact; a so-called ablation laser beam is guided into an internal cavity of the cylindrical wall in order to be placed in optical incidence under a normal axis (41) on the outer surface of the roller on a targeted contact point (11) of the strip and the roller, said beam passing through the wall via a wall opening (811), which is transparent to the beam; a plasma spectral emission distribution from the laser ablation to the contact point is collected by optical feedback in the direction of the normal axis (41) on the outer surface of the roller and through the opening in order to be guided towards a spectral measurement unit; and the normal axis on the outer surface for the optical incidence and feedback is placed in synchronous rotation with the roller. The invention also relates to a device with a plurality of embodiments for implementing the method of the invention, as well as to the advantageous uses thereof.

The invention discloses a novel uranium isotope ratio measuring device which mainly comprises a first detection laser, a second detection laser, a beam combiner, an ablation laser, a beam splitter, a first photoelectric detector, a second photoelectric detector, a data acquisition card and an industrial personal computer. Ablating laser emitted by the ablating laser irradiates a sample in the ablating chamber through the second reflecting mirror to excite plasma, laser emitted by the first detecting laser passes through the first polarizing film, laser emitted by the second detecting laser passes through the first reflecting mirror and the polarizing film in sequence, the two beams of laser are combined by the beam combiner and then pass through the plasma, the beam splitter re-splits to the first photoelectric detector and the second photoelectric detector, and the data acquisition card acquires signals of the first photoelectric detector and the second photoelectric detector and transmits the signals to the industrial personal computer. The invention further discloses a novel uranium isotope ratio measuring method. The invention provides a technology which is portable, rapid, high in sensitivity and capable of measuring the uranium isotope ratio in a non-contact mode.

A laser device (100) has an ablation laser source (401) adapted to provide an ablating laser beam (402; 402i) for ablating a target tissue (120). It further comprises a plume analyzing arrangement (250) adapted to identify and/or quantify substances in the debris of the plume (110) generated by the ablating laser beam (402) ablating the target tissue (120) particularly substances being biomarkers of the ablated target tissue (120).

The invention discloses a method for preparing a nanoscale high-performance Nd2Fe14B/MnBi composite magnet material. The method comprises the following steps: weighing raw materials according to a certain stoichiometric ratio, grinding and mixing, and pressing powder into blocks; presintering the pressed block under a certain temperature condition to form a precursor; cleaning and drying a precursor, putting the precursor as a target on a target bracket of a beaker, filling an isopropyl-ketone solution to submerge the precursor by 5-10 mm, putting the beaker on a rotating platform, and focusing a laser pulse beam on the surface of the precursor by adopting third harmonic of an Nd: YAG laser as an ablation laser light source to ablate so as to generate a mixed solution containing a nanoscale particle precipitate; and filtering the precipitate of the mixed solution, and repeatedly cleaning and drying to obtain the nanoscale high-performance composite permanent magnet material. The prepared composite nanocrystalline permanent magnet is clean in surface and good in chemical activity, meanwhile, structural deformity is effectively inhibited, and the magnetic performance of the nanocrystalline magnet is improved.

The invention discloses a processing method for cutting a silicon wafer by utilizing a time-resolved shadow imaging technology to assist laser liquid phase ablation in the technical field of laser,. Shadow images of cavitation bubbles and persistent bubbles are captured through an established time-resolved shadow imaging system, and dynamic models of the cavitation bubbles and the persistent bubbles are established; according to the dynamic model of the cavitation bubbles, the repetition frequency of the ablation laser is optimized, and the adverse effect of cavitation bubble refraction on the surface of the silicon wafer is reduced; the type and concentration of a liquid medium are optimized according to the dynamic model of the persistent bubbles, the residence time of the persistent bubbles is regulated and controlled, the persistent bubbles staying on the surface of the silicon wafer for a long time are prevented from reacting with subsequent laser pulses, and the adverse effect of the rupture impact effect of the persistent bubbles on the surface of the silicon wafer is relieved; and the processing method provided by the invention is utilized to process the silicon wafer, the obtained kerf is narrow, the heat affected zone is small, the sputter deposition range of the micro-nano particles is small, and the negative influence of induced bubbles is small.

A cosmetic method of directionally tightening human skin tissue includes providing an ablative laser source and a non-ablative laser source, then using the ablative laser source to form one or more overlapping circular shaped microchannels in the skin tissue; the overlapping microchannels formed have a longitudinal dimension larger than their cross dimension; then, using the non-ablative laser source to weld the microchannels, whereby the welding causes the skin tissue to tighten.