885results about How to "High repetition rate" patented technology

Frequency standards based on mode-locked fiber lasers, fiber amplifiers and fiber-based ultra-broad bandwidth light sources, and applications of the same.

Powerful nanosecond-range lasers using low repetition rate pulsed laser deposition produce numerous macroscopic size particles and droplets, which embed in thin film coatings. This problem has been addressed by lowering the pulse energy, keeping the laser intensity optional for evaporation, so that significant numbers of the macroscopic particles and droplets are no longer present in the evaporated plume. The result is deposition of evaporated plume on a substrate to form thin film of very high surface quality. Preferably, the laser pulses have a repetition rate to produce a continuous flow of evaporated material at the substrate. Pulse-range is typically picosecond and femtosecond and repetition rate kilohertz to hundreds of megahertz. The process may be carried out in the presence of a buffer gas, which may be inert or reactive, and the increased vapour density and therefore the collision frequency between evaporated atoms leads to the formation of nanostructured materials of increasing interest, because of their peculiar structural, electronic and mechanical properties. One of these is carbon nanotubes, which is a new form of carbon belonging to the fullerene (C60) family. Carbon nanotubes are seamless, single or multishell co-axial cylindrical tubules with or without dome caps at the extremities. Typically diameters range from 1 nm to 50 nm with a length >1 mum. The electronic structure may be either metallic or semiconducting without any change in the chemical bonding or adding of dopant. In addition, the materials have application to a wide range of established thin film applications.

Method for real-time computing of indirect illumination in a computer graphics image of a scene, comprising: defining a light propagation volume as a three-dimensional grid consisting of a plurality of grid cells; allocating a plurality of secondary light sources to grid cells of said light propagation volume; accumulating directional, colored irradiance contributions of all secondary light sources in a respective grid cell and repeating this step of accumulating for all grid cells of the light propagation volume to thereby obtain an initial indirect light intensity distribution. The propagation of light in said light propagation volume is then iteratively computed starting with the initial indirect light intensity to obtain a final indirect light intensity distribution, which is used for rendering the scene illuminated by the final indirect light intensity distribution during a usual scene rendering process from a camera's point of view.

A convenience controller activates a small zone high location precision welcoming detecting function (with high current utilization) in response to a detected arrival of an authorized user into a larger zone low location precision welcoming detecting function (with low current utilization) approach region around a vehicle. A short range transmitter broadcasts a polling signal covering the region. The short range transmitter has an approach pending mode wherein the polling signal is broadcast according to a first predetermined repetition and a baseline mode wherein the polling signal is broadcast according to a lower repetition. The short range transmitter has a first power drain in the approach pending mode. A wireless communication system is configured to monitor for user activity outside the approach region corresponding to a potential user entry into the approach region, wherein monitoring by the wireless communication system has a lower power drain. If the short range transmitter is in the baseline mode when the user activity is detected, then the short range transmitter switches to the approach pending mode.

The invention relates to a wide-band radar figure method used the multi-emitter and multi-receiver frequency molecular signal. It includes the below process: 1. the M array unit of the radar emitter emit M frequency molecular band signal; 2. the radar receiver is made up of N receiving array units which is set with M receiving channels matched to the M frequency molecular band signal, so it can get M*N channels of the echo signal; 3. disposing the M*N channels of the echo signal and finishing the object detection then it composes the many echoes into the high resolution figure in the object location and the distance. The invention has decreased the need of the radar to the instantaneous bandwidth; also the radar has the ability of the electronic scanning to complete the object detecting, tracking and figure.

Disclosed are methods and systems for subnanosecond rise time high voltage (HV) electric pulse delivery to biological loads. The system includes an imaging device and monitoring apparatus used for bio-photonic studies of pulse induced intracellular effects. The system further features custom fabricated microscope slide having micro-machined electrodes. A printed circuit board to interface the pulse generator to the micro-machined glass slide having the cell solution. An low-parasitic electronic setup to interface with avalanche transistor-switched pulse generation system. The pc-board and the slide are configured to match the output impedance of the pulse generator which minimizes reflection back into the pulse generator, and minimizes distortion of the pulse shape and pulse parameters. The pc-board further includes a high bandwidth voltage divider for real-time monitoring of pulses delivered to the cell solutions.

Ion manipulation systems include ion repulsion by an RF field penetrating through a mesh. Another comprises trapping ions in a symmetric RF field around a mesh. The system uses macroscopic parts, or readily available fine meshes, or miniaturized devices made by MEMS, or flexible PCB methods. One application is ion transfer from gaseous ion sources with focusing at intermediate and elevated gas pressures. Another application is the formation of pulsed ion packets for TOF MS within trap array. Such trapping is preferably accompanied by pulsed switching of RF field and by gas pulses, preferably formed by pulsed vapor desorption. Ion guidance, ion flow manipulation, trapping, preparation of pulsed ion packets, confining ions during fragmentation or exposure to ion to particle reactions and for mass separation are disclosed. Ion chromatography employs an ion passage within a gas flow and through a set of multiple traps with a mass dependent well depth.

The present invention provides long life optics for a modular, high repetition rate, ultraviolet gas discharge laser systems producing a high repetition rate high power output beam. The invention includes solutions to a surface damage problem discovered by Applicants on CaF₂ optics located in high pulse intensity sections of the output beam of prototype laser systems. Embodiments include an enclosed and purged beam path with beam pointing control for beam delivery of billions of output laser pulses. Optical components and modules described herein are capable of controlling ultraviolet laser output pulses with wavelength less than 200 nm with average output pulse intensities greater than 1.75×10⁶ Watts/cm² and with peak intensity or greater 3.5×10⁶ Watts/cm² for many billions of pulses as compared to prior art components and modules which failed after only a few minutes in these pulse intensities. Techniques and components are disclosed for minimizing the potential for optical damage and for reducing the pulse energy density to less than 100×10⁻⁶ J/cm³. Important improvements described in this specification have been grouped into the following subject matter categories: (1) Solution to CaF₂ surface damage discovered by Applicants, (2) description of a high power ArF MOPA laser system, (3) description of beam delivery units, (4) polarization considerations (5) a high speed water-cooled auto shutter energy detector module and (6) other improvements.

A set of accessory devices and a method that improves riding experience indoors and outdoors on devices using human propulsion and reciprocating motion. A mechanical accessory device that adds the stepping and reciprocating motion to a pedaling system, like those used on bicycles, tricycles, boats, individual power generators used indoors and outdoors with various positions, and movement range adjustments. A set of electronic accessories added gradually, that measures, records, transmits, processes and shares a large range of the parameters, generically called “riding experience” force and displacements, giving effort and work, GPS, accelerations, movie, etc. giving the path and rider vital and functional parameters, giving medical and exploratory results. A system that uses a code to process these information and transmits on the Internet, used on their indoors devices to reproduce the experience in their terms, transforming their devices in simulators, enabled to remotely control outdoors devices.

A method for detecting a vehicle comprising: providing a multi-channel scannerless full-waveform lidar system operating in pulsed Time-Of-Flight operation oriented towards a surface of the roadway to cover the detection zone; providing at least one initialization parameter; emitting pulses at an emission frequency; receiving reflections of the pulses from the detection zone; and acquiring and digitalizing a series of individual complete traces at each channel of system; identifying at least one detection in at least one of the traces; obtaining a height and an intensity for the detection; determining a nature of the detection to be one of an environmental particle detection, a candidate object detection and a roadway surface detection; if the nature of the detection is the candidate object detection, detecting a presence of a vehicle in the detection zone.

The invention provides a method of rapidly machining multiple, often similar or nearly identical, features using a LASER machining system. During LASER machining, light of a wavelength and intensity that will modify the workpiece to be machined is directed at the workpiece and interacts to produce the desired change. If several features are to be machined, the processing speed can be increased by operating on a multiplicity of features at once. In one embodiment of the invention, this is achieved by separating the LASER beam into multiple beams and machining the desired features simultaneously.

The invention discloses a preparation method of metal halide inorganic perovskite quantum dots. The method includes the steps of firstly, dissolving metal halide salt BX2 and AX in DMSO, and adding surface active agents; secondly, rapidly injecting the mixed liquid in reaction solvent; thirdly, making BX2 and AX rapidly react under the effect of the surface active agent to generate the ABX3 type metal halide inorganic perovskite quantum dots of different morphologies. According to the method, in the low-temperature solution method system, by using different surface active agents and reaction solvent for changing the morphologies of the metal halide inorganic perovskite quantum dots, the performance of the metal halide inorganic perovskite quantum dots is regulated and controlled, and the method has profound significance in constructing high-performance full-solution photoelectric devices.

Methods for treating a patient using time varying magnetic field are described. The treatment methods combine various approaches for aesthetic treatment. The methods are focused on enhancing a visual appearance of the patient. In one embodiment, the method is performed by switching on a device which includes a connection to an energy source, an energy storage device, a switching device and a magnetic field generating device including a core, and applying a time-varying field with a maximal value of magnetic flux density derivative of at least 300 T/s to a muscle of the patient. The diameter of the core is up to 80% of an outer diameter of the magnetic field generating device.

In a method for stimulation and treatment of a biological structure the biological structure is stimulated by high power time-varying magnetic field. The stimulation is followed by at least a partial muscle contraction. The method may be used e.g. in applications for non-invasive aesthetic medicine.

An improved electrical pulse generator incorporating MOSFET components, a programmable high voltage power supply, and a shaping network for generating short duration signals having narrow pulse widths and short rise times.

A system for surgical treatment of an eye includes a laser arrangement that is adapted to emit light with a wavelength and repetition-rate suitable for surgical treatment of the eye. The system further includes a temperature-registration device that is adapted to register the temperature of an object that is to be subjected to the light of the laser arrangement.

Methods and devices producing time varying magnetic field treats a patient. The device contains a coil made of insulated wires, an energy storage device, an energy source and a switch. The coil is flexibly attached in a case. The device has at least one blower for cooling the coil. The methods and devices can be used in for example in physiotherapy, neuropsychiatric therapy, aesthetic therapy, urology or urogynecology.

Methods and apparatus for analyzing ions by pipelining data acquisitions with an orthogonal time-of-flight (OTOF) mass spectrometer. A predetermined push sequence is established for launching packets of ions from a source region into a flight tube towards a detection region within the OTOF mass spectrometer such that ions which are launched in adjacent packets do not overlap prior to reaching the detection region. These discrete packets of ions do not intermingle and are launched in accordance with the predetermined push sequence along a propagation path from the source region toward the detection region such that portions of the packets of ions are simultaneously in-flight within the flight tube of the OTOF mass spectrometer. The times of arrival of ions are detected at the detection region to produce time-of-flight scans with signals corresponding to times of arrival for the ions in the launched packets of ions to provide a mass spectrum derived from pipelined data acquisitions.

In a method for stimulation and treatment, a biological structure is stimulated by a high power time-varying magnetic field. The stimulation is followed by at least a partial muscle contraction. The methods can be used e.g. in physiotherapy, urology or urogynecology.

An x-ray generating device includes at least one field-emission cold cathode having a substrate and incorporating nanostructure-containing material including carbon nanotubes. The device further includes at least one anode target. Associated methods are also described.

The invention discloses a rapid image registration method based on sub-image corner features. The method includes the specific steps: firstly, selecting a reference sub-image and a to-be-registered sub-image, selecting one sub-image from a reference image as the reference sub-image, and selecting one sub-image with the same coordinate space as the reference sub-image from a to-be-registered image as the to-be-registered sub-image; secondly, extracting corners of the reference sub-image and the reference sub-image; thirdly, performing feature description on the corners extracted from the reference sub-image and the reference sub-image to obtain a feature vector of each corner; fourthly, performing similarity measurement and feature matching on the feature vectors of the corners on the reference sub-image and the reference sub-image to obtain K matching point pairs; and fifthly, adopting a least square method to compute a transformation matrix H between the reference image and the to-be-registered image based on the K matching point pairs, and registering the to-be-registered image onto the reference image based on the transformation matrix H. By the method, the requirement for image matching precision can be met, and image matching speed is increased greatly.

A device for a motor vehicle includes at least one distance sensor for recording a predominantly lateral clearance between the motor vehicle and objects, and a control device for controlling the distance sensor, the distance sensor emitting measuring signals during an activation time, and receiving measuring signal reflected by at least one object during a measurement receiving time. In the process, the measurement receiving time of the distance sensor is modifiable by the control device.