354 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.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a configuration for a physical uplink control channel (PUCCH) resource for a transmission that uses multiple beams in a common time domain resource. The PUCCH resource may include multiple sets of physical resource blocks (PRBs). The UE may transmit uplink control information using the multiple beams in a respective set of PRBs of the multiple sets of PRBs of the PUCCH resource. Numerous other aspects are described.

An optical module, a laser radar and a terminal are applied to the technical field of detection. The optical module comprises N (N is a positive integer) transmitting ports, N receiving ports, a light beam processing module and a beam expanding module. The N transmitting ports are used for transmitting N transmitting light beams, and the N receiving ports are used for receiving return light beams of the N transmitting light beams. And the light beam processing module is used for transmitting the N emission light beams to the beam expanding module, and deflecting and spreading the N return light beams from the beam expanding module to the N receiving ports. The beam expanding module is used for expanding the N emitted light beams. Wherein the N return light beams are return light beams of the N emission light beams, and the N emission light beams passing through the light beam processing module and the N return light beams from the beam expanding module are coaxial light beams. The optical module is small in overall size, and when the optical module is applied to the detection device, the overall size of the detection device can be remarkably reduced under the condition that the detection performance of the detection device is not reduced.

An optical module, light detection and ranging, and a terminal, which are applied to the technical field of detection. The optical module comprises N (N being a positive integer) transmitting ports, N receiving ports, a beam processing module and a beam expanding module. The N transmitting ports are used for transmitting N transmission beams, and the N receiving ports are used for receiving returned beams of the N transmission beams. The beam processing module is configured to transmit the N transmission beams to the beam expanding module, deflect the N returned beams from the beam expanding module, and propagate the N returned beams to the N receiving ports. The beam expanding module is configured to expand the N transmission beams. The N returned beams are returned beams of the N transmission beams, and the N transmission beams which pass through the beam processing module and the N returned beams from the beam expanding module are coaxial beams. The optical module has a relatively small overall volume, and when the optical module is applied to a detection apparatus, the overall size of the detection apparatus can be obviously reduced without reducing the detection performance of the detection apparatus.

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 invention discloses an optical coherence tomography optical path structure and a dispersion compensation method thereof. The light path structure comprises a coherent light source, a 2 * 2 optical fiber coupler, a reference light path, a sample light path, an equal-wave-number spectrograph and an upper computer; low-coherence broadband light emitted by the coherent light source is divided into reference light and sample light after passing through the 2 * 2 optical fiber coupler, the reference light and the sample light are sequentially transmitted in a reference light path and a sample light path, the reference light and the sample light are retroreflected through a sample and a reference mirror and are retroreflected to the 2 * 2 optical fiber coupler according to an original light path, interference is generated, and interference light beams are transmitted to the equal-wave-number spectrometer. Interference light beams are split to an upper computer according to equal wave number intervals, and a tomographic image of a sample is obtained through algorithm processing of the upper computer. By means of the structure, the existing dispersion loss problem is solved from the source, most dispersion generated by a light path is solved, other dispersion is eliminated by adding a dispersion compensating mirror made of optical glass materials with certain thickness in the light path through algorithm calculation, the algorithm is simple, convenient and fast, and the imaging speed is high.

The present relates to device for ultra-high dose rate radiation treatment to a patient, comprising: —a radiation source for providing a radiation beam, and—a linear accelerator for accelerating said radiation beam until a predetermined energy, and—a beam delivery module for delivery the accelerated radiation beam. The device is arranged for generating an accelerated radiation beam having a predetermined energy between about 50 MeV and about 250 MeV, to deliver rate radiation dose of at least 10 Gy, during an overall time less than about 200 ms in order to generate a radiation field for treating a target volume of at least about 30 cm3, with said ultra-high dose rate radiation dose and / or a target volume located at least about 5 cm deep in the tissue of the patient with said ultra-high dose rate radiation dose.

Embodiments of the present disclosure relate to two-step beam geometry optimization and non-isocenter beam incidence angles. Systems and methods are disclosed for optimizing a processing plan using all degrees of freedom, including degrees of freedom associated with beam geometry parameters, the optimization including the step of limiting a search space for the beam geometry parameters using a trained machine learning model, also disclosed are systems and methods for obtaining beam geometry parameters for processing plans that do not require decentration of the beam delivery device isocenter.

The embodiment of the invention discloses a camera module, electronic equipment and a related anti-shake method. The camera module comprises an anti-shake assembly, one or more light path elements and an imaging assembly, wherein the one or more light path elements and the imaging assembly are sequentially arranged in the light beam transmission direction. Wherein the imaging assembly comprises a first image sensor and a second image sensor, and the anti-shake assembly is connected with at least one of the one or more light path elements; the first image sensor is used for detecting a first jitter amount of the camera module; the anti-shake assembly is used for driving at least one light path element in the one or more light path elements to perform shake compensation based on the first shake amount; and the second image sensor is used for performing optical imaging. By adopting the embodiment of the invention, the optical anti-vibration performance of the electronic equipment can be improved, and the user experience is improved.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit a beam failure recovery (BFR) message that indicates beam failure of a transmit receive point (TRP) among multiple TRPs and that includes a TRP identifier for the TRP and an index for a new beam. The UE may receive, in response to the BFR message, a physical downlink control channel communication. The UE may set the new beam for the TRP for one or more channels or reference signals that share a unified transmission configuration indicator state with a channel or a reference signal associated with the index. The UE may transmit or receive a communication using the new beam. Numerous other aspects are described.

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 present invention discloses a laser hole repair system for narrow cavity structural parts without back wall damage, including an ultrafast laser, a beam transmission system, a beam shaping system, a beam focusing system, a coaxial vision system, a three-dimensional motion platform and a computer controller; the ultrafast laser provides a femtosecond laser beam for the entire system, and after the laser beam is transmitted through the beam transmission system, the beam is transmitted to the beam shaping system to obtain a Bessel beam after shaping optimization, and the beam is then focused and contracted by the beam focusing system to the micropores on the surface of the target material of the narrow cavity structural part on the high-precision three-dimensional mobile platform for hole repair, and the whole hole repair process is observed through the coaxial vision system. The present invention obtains the required complete cylindrical micropores and the back wall of the narrow cavity structural part after processing is not damaged. Only the beam process control means are used to achieve the narrow cavity without back wall damage during hole repair, and the operation is simple and convenient.

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 discloses a Raman-meter temperature and humidity laser radar detection system with three wavelengths and eight channels. The Raman-meter temperature and humidity laser radar detection system comprises a transmitting system, a receiving system, a data acquisition and processing system and a computer control system. Laser signals with the wavelengths of 355 nm and 532 nm are combined with a dynamic background light intensity adjusting mechanism, so that the signal sensitivity under the conditions of strong background light in the daytime and low background light at night is ensured. The light splitting module adopts a high-performance narrow-band optical filter and a multilayer medium coated dichroic mirror which are arranged at a preset inclination angle and cooperate with an achromatic lens group of the collimation system, so that efficient light beam transmission and accurate separation of multi-wavelength signals are realized, spectral crosstalk is remarkably reduced, and the system detection precision, the environment adaptability and the data processing reliability are improved; the method is suitable for all-weather and multi-scene atmosphere detection.

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 discloses a light source unit, an eyeball tracking system and a control method thereof, and the light source unit comprises at least one light source, a light beam splitter and a phase modulator. The light source is used for emitting illumination beams; the light beam splitter is located in a transmission light path of the illumination light beam and used for carrying out n beam splitting on the illumination light beam to form split light beams, and n is larger than or equal to 2; and the phase modulator is positioned in a light path for transmitting the split light beam, is used for modulating the angle of the split light beam to irradiate the eye area of the user, and is also used for modulating the phase of the split light beam to interfere and overlap in the eye area of the user so as to provide illumination for the eye area of the user. Therefore, in a limited number of light sources, the light supplementing brightness of the eye area is effectively improved, the utilization rate of the light sources is improved, the light source power of the supply system is further reduced, and due to precise dimming of the phase modulator and the increase of the illumination distance, the eye tracker with the gradually increased frame rate and the gradually increased eye box movement range can be better adapted.

The embodiment of the invention provides an optical module and a near-to-eye display device. The optical module comprises a waveguide substrate, a coupling-in grating, a first collimating element, a second collimating element and a coupling-out grating. The coupling-in grating is arranged on one side of the waveguide substrate. The first collimating element is arranged on the side, away from the coupling-in grating, of the waveguide substrate or the side, away from the waveguide substrate, of the coupling-in grating. The second collimating element is arranged on the side, away from the waveguide substrate, of the first collimating element. The coupling-out grating is arranged on the waveguide substrate. A light beam can penetrate through the waveguide substrate and is transmitted to the first collimating element, the light beam emitted from the first collimating element is reflected by the second collimating element, and the light beam emitted from the second collimating element is transmitted to the first collimating element, is coupled into the waveguide substrate through the coupling-in grating, is transmitted in the waveguide substrate, and is coupled out through the coupling-out grating. The first collimating element and the second collimating element are used for collimating the light beam. According to the technical scheme, the size of the near-to-eye display equipment is reduced.

An example aspect comprises selecting an azimuth mode for an OAM MIMO transmission by a transmitter that includes a first number of circles that each include a second number of antenna elements, wherein the azimuth mode defines a DFT vector of a size less than or equal to the second number; selecting, from a plurality of radial modes associated with the azimuth mode, a radial mode for the transmission, wherein the radial modes include at least a first radial mode defining a first beamforming vector and a second radial mode defining a second beamforming vector, wherein each one of the first and second beamforming vectors includes the DFT vector weighted and repeated for a number of times less than or equal to the first number, wherein the first and second beamforming vectors are orthogonal to each other; and transmitting a signal using a beam configured according to the radial mode.

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.

A laser transmission optical cable based on a hollow-core anti-resonance optical fiber is suitable for flexible transmission of ultrafast laser, and comprises an input laser beam, and a first optical window, a first air chamber, a first water chamber, a hollow-core capillary optical fiber, a hollow-core anti-resonance optical fiber, a second water chamber, a second air chamber and a second optical window which are sequentially arranged along the beam transmission direction, the hollow-core capillary optical fiber and the hollow-core anti-resonance optical fiber are glued to form a nested structure, and the ratio of the diameter of a cladding capillary of the hollow-core anti-resonance optical fiber to the diameter of a fiber core of the hollow-core anti-resonance optical fiber is 0.63-0.68. The hollow-core anti-resonance optical fiber has high single-mode purity, the problem that a laser mode is coupled to a high-order mode due to mechanical disturbance such as optical fiber bending and twisting can be solved, the hollow-core anti-resonance optical fiber has higher adaptability in a complex processing environment, the laser processing efficiency and stability are improved, and the optical fiber is suitable for large-scale production. And meanwhile, the influence of a heat effect under high power and a nonlinear effect caused by air in an ultrafast laser transmission process are considered.

The invention discloses a proton therapy evaluation method and system, a storage medium and a computer program product, and relates to the field of data processing. The evaluation method comprises the following steps: forming a data set by data pairs of a historical proton beam delivery dose distribution image and a historical positron nuclide distribution image; constructing a first model, and training the first model by using the data set to obtain a second model; inputting the positron nuclide distribution image in the actual proton therapy into the second model to obtain a proton beam delivery dose distribution image in the actual proton therapy; and extracting the falling edge of the far end of the Bragg peak of the proton beam delivery dose distribution image in the actual proton therapy to obtain the range information of the proton beam in the actual proton therapy. According to the method, the delivery condition of the planned dose can be directly reflected, Monte Carlo simulation does not need to be carried out on different patients to obtain reference positron nuclide distribution images, time and computing resources are saved, and each treatment process can be verified.

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.

The invention provides a linear potentiometer, a beam distribution system and related equipment, and relates to the technical field of particle radiotherapy, and the linear potentiometer comprises a first conductive layer, a second conductive layer and a resistance layer which are sequentially stacked in the thickness direction; a first insulating layer is arranged between the first conducting layer and the second conducting layer; through structures are arranged on the first insulating layer at intervals. A hollow insulating layer is arranged between the second conductive layer and the resistive layer; one end of the resistive layer is grounded, and the other end is connected with input voltage; through the arrangement of the first insulating layer, the position measurement precision of the potentiometer can be improved; meanwhile, the relation between the position deviation and the measurement distance length is small, and the measurement stability is guaranteed; a characteristic curve of signal voltage and displacement is obtained through sliding of the pressure head, and the position of the pressure head can be measured and positioned through simple calculation.

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.