289 results about "Beam delivery" patented technology

A laser beam transmission system comprises a laser beam system and a controller that controls the laser beam system. The controller is configured to direct a laser beam at a location nearest to a maximum of an uncertainty area in which a satellite is expected to be located. The controller is configured to move the laser beam from the location to a next location nearest to the maximum of the uncertainty area in response to not receiving a confirmation that the satellite is at the location. The next location becomes a current location for the laser beam. The controller is configured to continue to move the laser beam from the current location to the next location nearest to the maximum of the uncertainty area from the current location in response to not receiving the confirmation that the satellite has received the laser beam.

The invention relates to the technical field of laser micropore processing, and discloses a device for processing a blade film hole by femtosecond laser, which sequentially comprises an infrared femtosecond laser for emitting laser, a blade hole forming device for guiding light and processing laser beams and a blade fixing device for fixing a blade to be processed along a beam transmission path, the blade hole forming device comprises a laser incidence port, a compact scanning galvanometer system for adjusting a laser scanning path, a rotating assembly capable of rotating around an optical axis and used for adjusting the emitting angle of a laser beam, a focusing system for adjusting laser focusing, a light guide assembly for adjusting light beam incidence and a light guide reflection assembly. The lower end of the scanning galvanometer system is connected with the upper end of the rotating assembly, the upper end of the focusing system is connected with the lower end of the rotating assembly, the lower end of the focusing system is connected with the upper end of the light guide assembly, and the lower end of the light guide assembly is connected with the light guide reflection assembly. And the infrared femtosecond laser, the compact scanning galvanometer system and the focusing system are all controlled by the control system. According to the system, blade film hole machining in a complex track can be achieved.

The utility model relates to a photoetching lens and a photoetching machine, which comprise a first lens group and a first reflecting mirror which are sequentially arranged along the direction of a first optical axis, and a second reflecting mirror, a second lens group and a third lens group which are sequentially arranged along the direction of a second optical axis, and after being reflected by the first reflecting mirror to pass through the second lens group in the forward direction, the light is reflected by the second reflecting mirror to pass through the second lens group in the reverse direction, and then passes through the third lens group to converge to an imaging surface. The structure of the photoetching lens has excellent imaging performance, a larger view field can be realized, and large-area photoetching pattern processing can be directly realized, so that the problem that the view field of the existing photoetching lens is small is solved; besides, a reflective structure is adopted, so that the light beam passes through the second lens group twice in the forward and reverse directions, the number of lenses is reduced by half while the transmission distance of the light beam is ensured, and therefore, the volume of the photoetching lens is effectively reduced, and the cost of the photoetching lens is reduced.

The invention discloses a physical model discovery and reconstruction method for light beam transmission characteristics based on a sparse physical information neural network, and belongs to the technical field of nonlinear optics and deep learning intersection, and the method comprises the following steps: S1, making a sparse and low-fidelity data set; s2, establishing a candidate function library of items possibly existing in a data back model by using automatic differentiation; S3, constructing a physical information neural network model with sparse regression to discover a physical model structure; s4, coefficient fine tuning is carried out on the found physical model, and high-fidelity data is reconstructed.The method is suitable for model discovery of light beam transmission data supported by a constant coefficient or variable coefficient partial differential equation, scarce and noisy low-fidelity data can be utilized, and high-fidelity data can be obtained. A simple physical model is found according to a physical information neural network and sparse regression, and a light beam transmission dynamic process is reconstructed, so that subsequent theoretical analysis and research on light beam transmission characteristics are facilitated.

The invention discloses a light field regulation and control system and method based on laser array coherent combination. A laser array generation module is used for outputting a high-power array light beam; a spatial beam-shrinking light path in the light field regulation and control module samples an array light beam and carries out beam-shrinking processing, so that the light field area of the array light beam after beam-shrinking can be matched with the effective target surface size of spatial light modulators, and the two spatial light modulators respectively regulate and control the phase and polarization of two cross-polarization components of the array light beam after beam-shrinking. The regulated light beam is transmitted to a phase and polarization locking loop; and the phase and polarization locking loop generates a phase control signal and a polarization control signal according to the regulated light beam output by the light field regulation module, and applies the phase control signal and the polarization control signal to a phase modulator and a polarization controller of each path of unit laser in the laser array generation module, so that phase and polarization locking of the high-power array light beam is realized. According to the invention, flexible light field regulation and control of far-field synthetic light spots of the array light beams can be realized.

Systems, methods, and computer software relating to gating using non-parallel imaging planes, determining accumulated dose to tissues during radiotherapy with actual beam delivery information, stopping / adjusting / reoptimizing therapy based on such accumulated doses and the generation and use of prognostic motion models and prognostic-motion adapted radiation treatment plans are disclosed.

The invention discloses a laser beam position and direction measuring and calibrating device and method. The laser beam position and direction measuring device comprises a measuring box body, and a main light path, a beam position stability measuring device and a beam direction stability measuring device are arranged in the measuring box body; the main light path comprises a first lens and a beam splitter, a laser beam to be measured is transmitted to the beam splitter through the first lens, and the laser beam to be measured is divided into a first light beam and a second light beam through the beam splitter; the light beam position stability measuring device comprises a second lens, a first light source conversion element, a first imaging lens group and a first light beam detector which are sequentially arranged along the transmission direction of the first light beam; and the light beam pointing stability measuring device comprises a third lens, a second light source conversion element, a second imaging lens group and a second light beam detector which are sequentially arranged along the transmission direction of the second light beam. The device solves the problem that the measurement of the position stability and the pointing stability of the laser beam cannot meet the long-term measurement requirement.

The invention discloses an LCOS optical illumination system for an AR-HUD projection unit, and belongs to the field of photoelectric illumination and display technologies. The system comprises an illumination light source, a collimating lens, a fly-eye lens, an optical diffuser, a wavelength selective light combination element, a polarized light conversion device, a relay lens, a PBS prism and an LCOS display chip. The illumination light source is a three-color LED light source and is composed of a red light LED, a green light LED and a blue light LED. After red primary light, green primary light and blue primary light are collimated by the collimation system, the light parallelism is optimized, the collimated light sequentially passes through the light diffusion element to optimize the light field uniformity and the fly-eye lens to eliminate the non-uniform illumination, then is unified into a single linear polarization state by the polarized light converter, is shaped by the relay system and keeps the light beam transmission quality, and finally is transmitted to the light source. And polarization state separation and light combination are realized through the PBS prism, and finally, the light is accurately coupled to the LCOS display chip, so that high-efficiency polarization state matching and imaging quality optimization are completed. According to the HUD-PGU system, the illumination brightness of the whole system is improved, the color reducibility of the system is improved, the illumination uniformity of system imaging is improved, the light energy utilization rate of the system is improved, meanwhile, the size of the HUD-PGU is reduced, and the manufacturing cost is reduced.

The invention provides a method and a device for testing optical fiber coupling efficiency in space optical communication, and belongs to the field of space optical communication. Comprising a light source generation module used for generating a test light beam; the turbulence simulation module is used for simulating the influence of external field turbulence on light beam transmission; the phase difference correction module is used for correcting a low-order phase difference caused by system installation and adjustment or platform vibration and the like and compensating other phase differences caused by phase differences of optical devices; the optical fiber coupling module is used for coupling the spatial light to an optical fiber and determining optical power; and the control module is used for controlling the turbulence simulation module and the phase difference correction module and determining the optical fiber coupling efficiency according to the optical power of the test light beam. By means of the device, a quantitative relation model between the single influence factor and the optical fiber coupling efficiency can be determined with high precision.

The invention relates to the field of ultrafast laser, and discloses a nonlinear femtosecond pulse energy self-stabilizing device. Comprising a nonlinear self-phase modulation module, a reflector, a grating, a lens and a filter which are arranged in sequence, and the nonlinear self-phase modulation module, the reflector, the grating, the lens and the filter form a light beam transmission path; the nonlinear self-phase modulation module comprises a conical lens, a low-dispersion lens and a nonlinear medium; the reflecting mirrors are reflecting mirrors with consistent reflection spectrums; the grating is used for expanding a spectrum carrying energy fluctuation information in a spatial domain to form frequency domain spatial distribution related to energy; the lens is used for focusing or collimating the light beam expanded by the grating; the filter is a liquid crystal filter and is used for dynamically setting a filtering range; abnormal disturbance in the light path is identified by using the generative adversarial network, and a compensation strategy is generated; the abnormal disturbance comprises sudden mechanical vibration and nonlinear coefficient mutation at the initial stage of medium damage.

The invention relates to a grating partition type diffraction optical waveguide and a preparation method thereof. The grating partition type diffraction optical waveguide comprises an optical waveguide sheet, three grating structures arranged on the optical waveguide sheet and optical thin films arranged on the grating structures. Wherein a coupling-in area, a transition area and a coupling-out area are sequentially arranged on the optical waveguide sheet along a light beam transmission path, and the transition area and the coupling-out area are divided into a plurality of grating subareas along a grating vector direction; the three grating structures are respectively arranged on the coupling-in region, the transition region and the coupling-out region; in the coupling-in area, the refractive indexes of the grating structure and the optical thin film are different. In the transition area and the coupling-out area, the grating structure and the optical thin film of the same grating subarea are different in refractive index, and the optical thin films of two adjacent grating subareas are different in thickness and / or refractive index. The grating structures of the coupling-in area, the transition area and the coupling-out area are covered with the optical thin film, the thickness and the refractive index of the optical thin film are modulated, the energy utilization rate of the diffraction optical waveguide can be improved, and the template cost is saved and the mass production yield is improved while waveguide uniformity modulation is not affected.

The invention provides a liquid level sensor and equipment with a liquid container, and relates to the technical field of liquid level measurement, and the liquid level sensor comprises a main body structure and a detection structure. The main body structure comprises a closed cavity along a first direction and a plurality of reflecting side surfaces. The detection structure is located in the closed cavity and comprises a circuit board and a light emitting element and a light receiving element which are located on the two opposite sides of the circuit board. The detection light beam can be sequentially reflected to the light receiving element through the reflecting side face, and the transmission direction of the detection light beam transmitted to the light receiving element is parallel to the light-in direction of the light receiving element or has a small included angle with the light-in direction of the light receiving element. According to the liquid level sensor, light isolation of the light emitting element and the light receiving element can be achieved on the basis of the lightproof circuit board, light beam transmission between the light emitting element and the light receiving element is achieved on the basis of the multiple reflection side faces of the main body structure, the structure is simplified, and precision is high.

The invention discloses a laser cutting machine light beam stabilization and transmission optimization method and platform, and relates to the technical field of laser cutting, and the method comprises the following steps: carrying out cutting equivalent partition based on current structure attribute information and structure design information of a to-be-cut workpiece to obtain N pieces of workpiece cutting area information; cutting machine control double channels are built and comprise a light beam stability control channel and a light beam transmission control channel, control parameter analysis is conducted on the information of the N workpiece cutting areas in parallel, and N workpiece area cutting control parameters are obtained; and a PID controller is adopted to carry out regulation and control calculation on the N workpiece area cutting control parameters based on the light beam quality parameters and the workpiece cutting surface form data, and the cutting control correction is determined to carry out compensation closed-loop control on the target laser cutting machine. The technical effects that light beam stable control and transmission loss reduction are achieved, the metal cutting precision and stability are improved, and then the workpiece laser cutting quality is ensured are achieved.

A surface plasmon resonance sensor system includes a sensor plate having a quartz glass substrate and a copper film sputtered onto the substrate and annealed for about two hours. A quartz prism is attached to a surface of the sensor plate, and a microfluidics unit containing carrier fluid is attached to the opposite surface. A target analyte reservoir is connected through a pump to inject target analytes into the microfluidics unit. A binder is attached to the copper film and binds to target analytes. A laser transmits a beam into the quartz prism at an incident angle that generates surface plasmons resonating with the copper film and reflects a phase shifted laser beam. Receive optics and a charge coupled device convert the phase shifted beam to electrical signals. A computing unit processes the electrical signals to compute refractive index changes based on phase shifts to indicate target analyte detection.

A laser system comprises a femtosecond laser, and a beam delivery system configured to deliver and scan a laser beam emanating from the femtosecond laser onto wood, based on a desired graphene design, wherein graphene is formed on the wood by the laser beam. A device capable of being fabricated by the laser system may include a temperature sensor which detects a temperature by measuring resistance of the graphene, a heater or a boiler which converts electrical energy to thermal energy, or electrical interconnects.

The embodiment of the invention discloses a wavefront regulation and control module, a wavelength selection switch and optical network equipment, and relates to the field of optical devices. The invention aims to improve the coupling efficiency of the wavefront regulation and control module. According to the specific scheme, the wavefront regulation and control module comprises a base layer, a filling layer and a plurality of metasurface optical elements. The base layer and the filling layer are stacked; the plurality of metasurface optical elements are located between the base layer and the filling layer; on the surface of the base layer, the arrangement path of the plurality of super-surface optical elements is arc-shaped. In the transmission process of the light beams in the wavelength selective switch, due to the fact that the positions of the input ports of the optical fiber array are different, the incident angles of the light beams, transmitted to the grating, of the input ports are different. And the light beam of each input port has position offset in the dispersion direction after being shaped by the grating. The plurality of metasurface optical elements are arranged in an arc shape, so that the energy loss caused by the deviation of the light beam in the dispersion direction after the light beam is shaped by the grating can be reduced, and the coupling efficiency of the wavefront regulation and control module is improved.

This invention provides a gas cluster ion beam apparatus capable of planarizing a material substrate by irradiating it with a neutral beam. A neutral gas introduction device (26) is provided for a vacuum container (2). By introducing neutral gas from the neutral gas introduction device (26), the gas cluster ion beam (11) traveling along the beamline in the beam delivery system (BT) collides with the neutral gas, undergoing dissociation and neutralization to form a high-energy neutral beam (25). Furthermore, a reflective electrode (28) is provided between an electrostatic lens (9b) and the material substrate (15), and a high voltage equal to the accelerating voltage is applied to the reflective electrode.

Disclosed are systems, methods, and computer software related to gate control using non-parallel imaging planes, determining the accumulated dose to tissue during radiation therapy using actual beam delivery information, stopping / modifying / re-optimizing treatment based on the accumulated dose, and generating and using radiation therapy plans with prognostic motion models and prognostic motion adaptation.

The invention provides a satellite optical communication system and method. The system comprises a data transmission satellite; a hologram transceiving module is configured in the data transmission satellite and comprises a light input / output port, a spatial light modulator and an optical head; the light input / output port, the spatial light modulator and the optical head form a light beam transmission internal link; the optical input and output port is used for realizing communication between a light beam transmission internal link and other devices in the data transmission satellite; the spatial light modulator is used for loading a phase hologram, the received light beams are subjected to beam splitting processing or / and beam combining processing through the phase hologram, and the light beams after beam splitting processing carry the same communication data; and the interactive direct connection satellite is a satellite which directly performs data interaction with the data transmission satellite. According to the invention, the communication data transmission efficiency of the data transmission satellite can be improved.

The application provides a device for overlay mark scatterometry, comprising: an illumination unit, an objective, a light splitting unit, a first detection unit and a second detection unit; wherein the illumination unit is used for providing a measuring beam; the first detection unit is located at a pupil plane of the objective, and the second detection unit is located at an image plane of the objective; the measuring beam provided by the illumination unit is transmitted to a substrate with an overlay mark through the light splitting unit and the objective, and forms a first beam after being reflected by the substrate with the overlay mark; the first beam is transmitted to the objective and the light splitting unit, and forms a second beam and a third beam after being split by the light splitting unit; the second beam is transmitted to the first detection unit, and the third beam is transmitted to the second detection unit; and an overlay error of the overlay mark on the substrate is obtained according to a signal detected by the first detection unit and a signal detected by the second detection unit.

Aspects of this technical solution are directed to multiplexed transmission by optical beam transmission. A method can include generating a first beam having a first frequency in an optical frequency range, generating a second beam including data and having a second frequency in the optical frequency range, converting the first beam and the second beam into a third beam including the data and having a third frequency based on a difference between the first frequency and the second frequency, and transforming the third beam into a fourth beam having a first angular distribution and including a first portion of the data, and into a fifth beam having a second angular distribution corresponding to the first angular distribution and including a second portion of the data.

In some implementations, an optical device (e.g., a monolithic master oscillator power amplifier (MOPA) diode) may include a first facet, one or more gratings, an amplifier structure terminated with a second facet, and an oscillator array that includes multiple singlemode oscillators coupled to the first facet and to the one or more gratings. In some implementations, the multiple singlemode oscillators may be configured to generate multiple seed beams and to transmit the multiple seed beams into the amplifier structure through the one or more gratings.

Loss measurement system in an integrated photonic circuit and associated method. The invention relates to a system (100) for measuring the absolute insertion loss ILcp ​​of a photonic circuit (20) comprising input (21) and output (22) interfaces, the system comprising a first optical fiber (1) configured to transmit the beam emitted by a light source (10) to a first connector, an injection optical fiber (2) connected to the first fiber using the first connector and configured to transmit the beam to the input interface, a collection optical fiber (3) configured to collect the beam from the output interface, a second optical fiber (4) connected to the collection fiber using a second connector and configured to transmit the beam to a detector for measuring a characterization power Pcp, the system comprising a calibration element (110) having an insertion loss ILmir,The system is configured to measure ILcp ​​insertion losses after calibration via the calibration element. Figure for the abbreviation: Fig. 1A,

The utility model discloses a kind of single camera double visual field adjustable optical path's laser imaging device, the device includes imaging module, light splitting module, optical path adjusting module and shell, imaging module, light splitting module and optical path adjusting module are all connected in shell, and light splitting module and imaging module are sequentially arranged along laser input direction, optical path adjusting module is arranged below imaging module;Light splitting module is used to divide laser into first light beam and second light beam, and first light beam is transmitted to imaging module, and second light beam is transmitted to optical path adjusting module;Optical path adjusting module is used to adjust the optical path of second light beam, and second light beam is transmitted back to light splitting module, and is transmitted to imaging module by light splitting module;Imaging module is used to synchronously scan measurement to first light beam and second light beam.The utility model's light splitting module divides laser into first, second light beam, imaging module simultaneously measures first light beam and second light beam, realizes laser far field synchronous detection, improves measurement efficiency and synchronism.

The application provides a wafer warping detection device, a processing device, a method and a storage medium. The detection device comprises a monochromatic light source for providing a detection light beam. At least three half-reflective half-transmissive lenses are used to obtain the detection light beam, reflect it to corresponding mirrors, and then transmit the detection light beam to corresponding optical fibers and the next half-reflective half-transmissive lens. At least three mirrors are respectively used to detect the detection light beam, form a reference light beam, and transmit the reference light beam to corresponding detectors. At least three optical fibers are respectively used to transmit the detection light beam to at least three detection windows, irradiate corresponding measured points of a wafer to be measured through the detection windows, reflect to form an object light beam, and transmit the object light beam to corresponding detectors. At least three detectors are respectively used to collect the reference light beam and the object light beam. A processor is connected to the detectors, and is used to determine distances from each corresponding measured point of the wafer to be measured to a wafer tray surface according to the number of interference fringes in an interference fringe image, and determine the warping of the wafer according to the distances.

A beam delivery system for a probe includes a plurality of laser sources configured to generate respective incident beams, the plurality of laser sources including a first laser source that generates a first incident beam and a second laser source that generates a second incident beam. The system includes routing structures respectively positioned along a path of a respective incident beam. The optical subsystem is adapted to sequentially direct the respective output beams from the routing structure into each core in a multi-core optical fiber in communication with the probe. The first routing structure and the second routing structure each comprise an array of optical elements adapted to move synchronously such that the first incident beam and the second incident beam concurrently encounter the same member in the array.

Methods and systems of radiosurgical treatment include rotating one or both of a first gantry component and a second gantry component while transmitting a therapeutic treatment beam so as to deliver a therapeutic radiation dose to a target tissue of a patient from one or more arcs extending along a treatment sphere. The first gantry component is rotatable about a first axis and a second gantry component is interfaced with the first gantry component such that rotation of the first gantry component rotates both the first and second gantry components about the first axis. The second gantry component is independently rotatable about a second axis. The method includes coordinating movement of the first and second gantry components along the respective first and second axes so as to allow a trajectory of the therapeutic treatment beam to intersect the target tissue from multiple directions along the treatment sphere.

The invention discloses a laser output optical device, a laser, equipment and a method. The laser output optical device comprises an output optical fiber, an optical waveguide and an optical output head which are connected in sequence, the output optical fiber is used for outputting point ring light beams, a cladding layer, wrapping the second fiber core, of at least partial area, close to the output optical fiber, of the optical waveguide comprises a second conical structure, and the cross section of the second conical structure is annular. The outer diameter of the second conical structure is gradually increased in the light beam transmission direction, and the second conical structure is used for adjusting the light path of the point ring light beam so as to adjust the divergence angle of inner and outer ring light beams. And the optical output head is used for outputting the light beam adjusted by the optical waveguide. The pre-modulated light from the output optical fiber is accurately regulated and controlled, the divergence angle of the output light is adjusted, the light beam quality is improved, and meanwhile the device has the advantages of being simple in structure, low in cost and high in stability.

The application is suitable for the technical field of laser radar, and provides a laser radar, which comprises a light source, a transmitting module, a receiving module, a transmission module, a detecting module and a signal processing module; the transmission module comprises a first coupler and a plurality of transmission media, wherein the local oscillator beam is transmitted to at least one transmission medium for delay processing through the first coupler, and the delay amount of the at least one transmission medium is different from that of the other transmission media; the detecting module is connected with the transmission module and the receiving module respectively, is used for receiving the echo signal and the delayed local oscillator beam output by the transmission module, performing beat frequency processing on the echo signal and the delayed local oscillator beam to obtain a beat frequency signal, and converting the beat frequency signal into a detecting electric signal; and the signal processing module is electrically connected with the detecting module, is used for determining a to-be-measured object according to the detecting electric signal. The laser radar provided by the application can improve the strength of the detection signal in long-distance measurement.

A method (300) for controlling a substrate etching process includes disposing (301, 302) a bottom surface or a top surface of a substrate adjacent to a volume of etching fluid to create an etchant-substrate interface, and heating (305) the etchant-substrate interface via spatially controlled electromagnetic radiation. The method further includes transmitting (303) a monitoring beam through the substrate, the substrate and the volume of etching fluid being at least partially transparent at the wavelength range of the monitoring beam, and measuring (304) a property of the substrate surface via the monitoring beam during the substrate etching process to generate a real-time measured property of the substrate. A corresponding etching system (100A-100D) and a computer program product are also disclosed herein.