210 results about "Beam delivery" patented technology

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 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 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.

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.

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.

The present disclosure provides a device suitable for generating a frequency-stable microcavity optical frequency comb, comprising: a light source part configured to emit a light beam; a beam splitting device configured to split the light beam emitted by the light source part into a plurality of first light beams; a light source frequency determination unit connected with a first output port of the beam splitting device, the adjustment frequency being determined based on the absorption of the first light beams by atoms in the light source frequency determination unit, and the light source part adjusting the frequency of the emitted second light beams based on the adjustment frequency; a resonant microcavity connected with the light source frequency determination unit, the second light beams generating a first microcavity optical frequency comb in the resonant microcavity; and a modulation unit arranged between a second output port of the beam splitting device and the resonant microcavity, configured to modulate the second light beams into third light beams with repetition frequency information based on the repetition frequency of the first microcavity optical frequency comb, and the third light beams generating a second microcavity optical frequency comb in the resonant microcavity.

The present disclosure relates to a device for printing dual holographic, including a plurality of lasers that represents different wavelengths, a plurality of dichroic lenses and mirrors that combine beams output from the plurality of lasers into one beam and output the combined beam as a white beam, a plurality of beam splitters that separates the white beams output through the plurality of dichroic lenses and mirrors, transmit the separated white beams to a stereogram printing device, a wavefront printing device, and a reference beam, separates a beam heading to the reference beam, and transmits the separated beam to the stereogram printing device and the wavefront printing device, and a computer that controls the stereogram printing device and the wavefront printing device so that a hologram is printed with the beam transmitted through the beam splitters.

A focal plane array system includes a plurality of pixels configured to output a first signal light beam and to receive a second signal light beam reflected from a target object. Each of the plurality of pixels includes a transmitter, a receiver, and an interference light beam controller that includes a splitter disposed on an emission path of the first signal light beam to split a portion of the first signal light beam into an interference light beam, a receiving coupler disposed on a receiving path of the second signal light beam reflected from the target object, and a waveguide configured to transport the interference light beam split from the splitter to the receiving coupler. The receiving coupler is configured to transport the second signal light beam reflected from the target object to the receiver and to combine the interference light beam with the second signal light beam.

The utility model discloses a spectrum correction type imaging chrominance meter, which is used for improving the test precision and shortening the test time. The color and brightness meter comprises a lens, a color and brightness meter main body and a shaping lens group, the lens is connected to the color and brightness meter main body, and the lens is used for transmitting a light beam into the color and brightness meter main body; a wheel rotating disc and a built-in spectrograph are arranged in the chrominance meter main body, an optical fiber is arranged on the chrominance meter main body, the optical fiber is connected with the built-in spectrograph, a reflecting prism is arranged on the wheel rotating disc, and the wheel rotating disc is controlled to rotate so that the reflecting prism can be arranged at the position corresponding to the lens. The reflecting prism is used for reflecting the light beam; the shaping lens group is arranged on a light path of the light beam path and used for converging the light beams into parallel light beams, and the parallel light beams irradiate the end face of the optical fiber.

The invention provides a real-time 4D-CBCT imaging method based on a Unet-Transform model, and the method comprises the steps: constructing a comprehensive cascade deep learning network model integrating a Unet network and a Transform network, training the network model, inputting a plurality of CBCT projections containing different respiratory movement amplitudes, which are collected at the same rack angle at the online treatment moment of a patient, into the trained network model, the model outputs three PCA feature tags of a DVF between a predicted phase of breathing motion of a patient at the current moment and a reference phase corresponding to CBCT projection in real time, the PCA feature tags are converted into the DVF through principal component analysis, a reference phase image of an earlier-stage 4D-CT of the patient is deformed under the guidance of the DVF, a corresponding 4D-CBCT image of the breathing phase at the current moment is obtained, and the CBCT image of the breathing motion of the patient at the current moment is obtained. And finally, a 4D-CBCT image sequence capable of covering a complete respiratory cycle is obtained. According to the method, dynamic volume imaging is carried out on the patient during SBRT fractional treatment beam exiting by utilizing a Unt-Transform network model framework, a tool for accurately monitoring movement of tumors in the lung during beam exiting treatment of the patient is provided for clinicians, and technical guarantee is provided for accurate and safe implementation of the lung cancer SBRT.

This invention provides a dark-field ring illumination device and an optical inspection system, relating to the field of optical technology. The dark-field ring illumination device provides a light source that outputs an illumination beam, which is split into a first beam and a second beam by a prism beam splitting unit. An optical path transmission unit includes a first reflector and a second reflector. The first reflector reflects the first beam to an optical path refraction unit, and the second reflector reflects the second beam to the same unit. The optical path refraction unit changes the transmission direction of the first and second beams, transmitting them to a ring illumination shaping unit. The ring illumination shaping unit modulates the first and second beams into an arc shape and splices them into a ring-shaped illumination field of view for the object under test. This dark-field ring illumination device improves beam transmission efficiency and ensures omnidirectional defect detection capability.

The application discloses a three-waveband light automatic calibration fundus imaging device and method, which comprises a central light path channel, the central light path channel comprising fundus mirrors, a short-wave pass dichroic mirror, an intermediate light path correction module one, a long-wave pass dichroic mirror, an intermediate light path correction module two and an intermediate infrared camera arranged in sequence; further comprising two side infrared cameras at a certain angle with the central light path channel, an annular lamp strip located around the fundus mirror, an induced display located below the long-wave pass dichroic mirror, an OCT sample arm electric control lifting module and an OCT light path channel located directly below the short-wave pass dichroic mirror; the device can obtain face, eye and eyeball gaze direction information, transmit the OCT light beam to the pupil, eliminate the restriction that the human head must be strictly fixed during OCT fundus imaging, suppress the adverse effect of the shaking of the eyeball gaze direction on imaging through visual induction, and automatically adjust the OCT light path spacing, adapt to different vision groups, and improve the efficiency and quality of fundus imaging.

The invention relates to the technical field of biomedical imaging, in particular to a multi-wavelength optical fiber imaging device and system, and aims to solve the problem that an existing optical fiber imaging system obtains less imaging wavelength information. The multi-wavelength optical fiber imaging device comprises a plurality of transmission optical fibers, a scanner and an objective lens, a plurality of first light beams with different wavelengths can be transmitted to the scanner by arranging the transmission optical fibers with different specifications, the scanner changes the propagation direction of the first light beams with different wavelengths and scans a target tissue, and the target tissue is obtained. The plurality of first light beams of different wavelengths are focused on the target tissue by the objective lens so as to image the target tissue. According to the multi-wavelength optical fiber imaging device, respective transmission of multiple first light beams with different wavelengths is realized, the wavelength range of the working light beams transmitted by the imaging device is expanded, and the multiple first light beams with different wavelengths are used for imaging the target tissue, so that more imaging information of the target tissue is provided, and the imaging requirements of complex application scenes are met.

This application relates to a method for producing a refractive and diffractive hybrid two-dimensional optical waveguide, belonging to the technical field of optical waveguide design, and includes the following steps: S1, setting the beam transmission path and determining the coupling-in region, transition region, and coupling-out region on the waveguide plate; S2, forming an array coupling-in grating and an array coupling-out grating in the coupling-in and coupling-out regions defined on the waveguide plate using an array waveguide grating process; S3, determining the grating period, transparent portion width, grating width, resolution, and dispersion rate of the transition region based on a preset calculation rule; S4, using the calculation data from S3, forming a diffraction transition grating in the transition region defined on the waveguide plate using a surface relief process. The hybrid refractive and diffractive waveguide results in a lower overall cost, better color, higher brightness and luminous efficiency, simpler process, higher mass production capability, less susceptibility to rainbow patterns, and no light leakage from the back side. It also requires low equipment costs and has a coupling efficiency close to 100%, leading to better performance.

This invention discloses a device and method for real-time thermal focal length measurement of a long-pulse LDA side-pump module. The device includes a detector source, a beam expander system, an LDA side-pump module, a knife edge, an energy meter, and a signal generator. The detector source serves as the detection light source for thermal focal length measurement; the beam expander system serves as a beam expander for the detector source size; the LDA side-pump module serves as a heat source generator to achieve high peak power pump injection under long-pulse pumping; the knife edge is placed on both sides of the beam waist position after the detector source passes through the LDA side-pump module to cut the transverse and longitudinal beams, achieving beam size characterization; the energy meter is placed in the rear region of the measurement device to acquire the energy measurement of the detector source; and the signal generator serves as a timing control part to achieve timing synchronization between the detector source and the LDA side-pump module. This invention uses timing synchronization combined with Gaussian beam transmission transformation to obtain the thermal focal length value of the long-pulse LDA side-pump, which has the advantages of simple structure, ease of operation, and high measurement accuracy.

The application provides a kind of sub-aperture mosaic spectral calibration detection device and its detection method, wherein the detection device includes: broadband light source, wavelength division multiplexing device, coupler, integrating sphere and spectrometer;Detection device is used to detect large aperture telescope system, and telescope system includes primary mirror and secondary mirror;Broadband light source is used to emit broadband light beam to wavelength division multiplexing device, and wavelength division multiplexing device is used to select the frequency band of broadband light beam, and the incident light beam is transmitted to the pupil of telescope system through coupler, and is incident to focal plane after being reflected twice in primary mirror and secondary mirror of telescope system, and integrating sphere is arranged at the focal plane of telescope system, and the outgoing light beam is transmitted to spectrometer by multimode optical fiber to obtain the actual measured spectral data T (i). The application selects spectrum by wavelength division multiplexing device, and the response generated by different spectrum, finally realizes the splicing detection of system through the cooperation of three domains of space domain, time domain and frequency domain.

The utility model relates to the technical field of laser, in particular to a laser cutting head and a laser cutting device provided with the laser cutting head. In order to improve the cutting debugging efficiency and the adjusting precision of a three-dimensional laser cutting device, the utility model provides a laser cutting head which comprises a light beam transmission cylinder, a focus lens and an adjusting mechanism, an adjusting groove hole is formed in the cylinder wall of the light beam transmission cylinder, and the focus lens is arranged in the adjusting groove hole. The focus lens is fixed in the focus lens base and installed in the light beam transmission cylinder, and the adjusting mechanism is located outside the light beam transmission cylinder and connected with the focus lens base through a connecting piece arranged in the adjusting groove hole in a penetrating mode. The adjusting mechanism can drive the focus lens base to move in the direction of the central axis of the focus lens through the connecting piece. The laser cutting head is high in debugging efficiency and high in adjusting precision.