286 results about "Optical beam" patented technology

The invention provides a light beam scanning device of an integrated photonics chip and a test method. The light beam scanning device of the integrated photonics chip comprises a chip sample table, a chip sample table base, a light beam receiver connected with a lens cone and a horizontally arranged turntable base, the lens barrel is arranged above the turntable base, and a diaphragm adjusting structure and at least four lens groups are arranged in the lens barrel; the central point of the chip sample table base is overlapped with the central point of the turntable base, the chip sample table base is positioned above the turntable base, and the chip sample table is vertically arranged at the central point of the chip sample table base. Through switching of different lens groups in the lens cone, measurement of far and near fields of the to-be-tested chip is realized by using the same lens cone, the lens cone is arranged on the turntable base, and the test angle range can be adjusted according to specific test requirements so that various chip test requirements can be met.

This invention presents a frequency-domain fluorescence lifetime imaging system, enhancing capabilities with a spatial beam attenuator and pinhole beam splitter. The spatial beam attenuator reshapes any beam into a circular Gaussian beam profile, being compact, cost-effective, with low loss and back reflection. Using digital printing technology, a thin optical film is deposited onto an optical substrate for precise local attenuation of the beam in either transmission or reflection mode. The pinhole beam splitter consists of an optical beam splitter with an active region the size of a pinhole, positioned near the beam's focus, which directs focused light into two paths based on acceptance or rejection by the pinhole. This configuration allows for two detectors to collect photons from both paths concurrently, facilitating dual-mode imaging. Consequently, the system can generate both confocal and conventional non-confocal laser scanning fluorescence lifetime images of the sample at the same time.

The invention relates to a measuring arrangement for the interferometric determination of the surface shape of a test object, wherein a test wave generated from electromagnetic radiation and reflected at the test object can be superimposed with a reference wave not reflected at the test object, with a reference element (110, 210, 310, 410) having a reference surface (112, 212, 312, 412) which, in the optical beam path, splits off the reference wave from the test wave before it strikes the test object (120, 220, 320, 420) by reflection, and at least one beam shaping surface (111, 211, 311, 411, 413, 414) located in the optical beam path in front of the reference surface, wherein this beam shaping surface is designed as an aspherical distortion correction surface such that a distortion occurring in a predetermined reference plane of the measuring arrangement is reduced. The invention further relates to a method for manufacturing an optical element for such a measuring arrangement.

The invention relates to a windshield for a vehicle, having an exposed exterior-side surface (I) and an exposed interior-side surface (i), wherein the windshield has a transmission region (S) which is provided for the optical beam path of a transmitter and / or receiver (4) of electromagnetic radiation, and the interior-side surface (i) is provided with an anti-reflection coating (20) in the transmission region (S), the anti-reflection coating comprising, in the specified order starting from the interior-side surface (i): - a first optically high-refractive layer (21) having a refractive index of at least 1.9 and an optical thickness of 95 nm to 225 nm; - a first optically low-refractive layer (22) having a refractive index of maximally 1.6 and an optical thickness of 40 nm to 135 nm; - a second optically high-refractive layer (23) having a refractive index of at least 1.9 and an optical thickness of 415 nm to 615 nm; and - a second optically low-refractive layer (24) having a refractive index of maximally 1.6 and an optical thickness of 290 nm to 410 nm, the optical thickness being determined as the product of the geometrical thickness and the refractive index at 550 nm.

The invention discloses a thin-film barium titanate electro-optical switch unit based on a composite electrode and an array thereof. The optical switch unit comprises a first waveguide optical fiber coupling module, a second waveguide optical fiber coupling module, an optical beam splitting module, an electro-optical phase shift region, an optical beam combining module, a third waveguide optical fiber coupling module and a fourth waveguide optical fiber coupling module. Wherein the composite electrode of the electro-optic phase shift region is composed of a metal electrode and a transparent conductive layer, the electrode is closer to the waveguide by utilizing the transparent characteristic of a transparent conductive material, the coupling of a light field and an electric field is effectively enhanced, and the extinction ratio is improved. Meanwhile, a barium titanate film with a high electro-optical coefficient is adopted as a waveguide material, and the performance is further optimized, so that the electro-optical switch unit has the excellent characteristics of low-voltage driving, high extinction ratio, low insertion loss and small size.

The utility model provides a macro-energy laser energy measuring device, which comprises a beam expanding lens, a polarization beam splitter and two wedge-shaped mirrors which are arranged along a light beam propagation path, the polarization beam splitter is matched with the beam expanding lens to divide an expanded light beam into two polarized light beams, and the number of the wedge-shaped mirrors is two. And the two wedge-shaped mirrors are matched with the polarization beam splitter and are used for respectively splitting the two beams of polarized light in proportion and then enabling the two beams of polarized light to enter a light measurement area. According to the utility model, the PBS, namely the polarization beam splitter, is combined with the wedge-shaped mirror, so that the change of the light splitting proportion caused by the thermal depolarization effect of the high-power laser is avoided, and the influence of the polarization state change of the high-power laser under the change of the thermal effect on the measurement is reduced, thereby improving the precision of energy measurement; the light spot area is increased through the beam expanding lens, and the damage threshold is improved; according to the utility model, as the precision of energy measurement is improved, light beams can be prevented from directly hitting on the probe of the energy meter, and after the damage threshold is improved, the damage risk of an instrument is greatly reduced, the service life of the instrument is prolonged, and the measurement cost is reduced.

An apparatus for measuring movement of a test specimen, where the apparatus includes an electromagnetic transducer and an optical probe. The apparatus may include a test specimen holder and a body that move together. The optical probe may be configured to direct an optical beam through the body to the test specimen, which may provide for measurement of a prompt impulse. The electromagnetic transducer may be configured to produce a voltage when the test specimen holder and the body move, which may provide for measurement of a total impulse of the same test specimen. Thus, a single gauge may provide for measuring both prompt impulse and total impulse of the same test specimen.

Aspects of this disclosure configure a processor for detecting defects in the solder mask of a printed circuit board (PCB) using an optical waveguide. The processor directs an optical beam toward the input of one or more optical waveguides embedded in a protective coating layer of a PCB, the protective coating layer being adjacent to one or more conductive traces of the PCB. The processor measures a beam property of the optical beam emitted by the one or more optical waveguides. The processor detects a break in the optical beam emitted by the one or more optical waveguides based on this beam property.The processor detects a fault in the protective coating layer of the PCB based on detecting the interruption of the optical beam emitted by the one or more optical waveguides.

We present a novel optical lever surface slope metrology tool employing a plurality of optical beams converging and crossing at the point close to the measured surface. The system increases the range and accuracy of the measurement.

The invention discloses a dual-drive differential thin film barium titanate electro-optical modulator. Comprising a narrow linewidth laser, a first optical fiber waveguide coupling module, a second optical fiber waveguide coupling module, a first 1 * 2 optical beam splitter, a second 1 * 2 optical beam splitter, a first radio frequency module, a second radio frequency module, a GSGSG coplanar traveling wave electrode structure, a first waveguide and a second waveguide, wherein the GSGSG coplanar traveling wave electrode structure consists of a first ground electrode, a first signal electrode, a second ground electrode, a second signal electrode and a third ground electrode; the invention relates to an a-axis oriented barium titanate film and a substrate. After beam splitting, input laser is respectively injected into two parallel waveguides which are prepared on the barium titanate film and penetrate through the GSGSG structure. The first radio frequency module and the second radio frequency module apply composite modulation signals including direct current bias and differential radio frequency signals to the signal electrodes, so that the refractive indexes of the two waveguides have opposite sign changes to realize push-pull modulation, and modulated optical signals are output after beam combination. By means of the dual-drive differential and GSGSG electrode structure, the modulation efficiency is improved, and meanwhile the anti-interference capacity and stability of the device are remarkably improved.

The invention relates to a mobile laser scanning microscope (100) comprising: a chassis (10) with rollers (12), an optical table (30) connected to the chassis (10) via a vibration damper (20), an upper optical box (40) containing a scanning head (42) with acousto-optical deflectors, a pillar (60) connecting the upper optical box (40) to the optical table (30) and holding it at a distance above therefrom, a stage (31) arranged on the optical table (30), a microscope module (32) arranged above the stage (31) and comprising a microscope objective (33) optically coupled to the scanning head (42) and at least one detector (75a, 75b), at least one laser (35) arranged on the optical table (30), an optical beam path (36) guiding a beam of the at least one laser (35) from the at least one laser (35) through the upper optical box (40) to the objective (33), compartments (17) connected to the chassis (10) below the optical table (30) and housing power supplies (15) and control systems (16) of the microscope (100), and a light barrier system (50) having a cover (52) covering units arranged on the optical table (30).

An optical beam steering apparatus includes an array of optical elements. Each optical element includes a lens, a switchable array of optical emitters configured to emit light into the lens, and a phase-shifting element configured to control a phase of the light emitted by the optical emitters. A controller is configured to control the array of optical elements to emit a beam of light in a predetermined direction. The controlling includes coarsely adjusting a direction of the beam of light, including, for at least some optical elements of the array of optical elements, configuring the optical element's switchable array of optical emitters to emit light into the optical element's lens according to the predetermined direction. The controlling also includes finely adjusting the direction of the beam of light, including configuring the phase-shifting elements of the optical elements to control a phase relationship between the light emitted by the optical elements according to the predetermined direction.

A kind of board card, cabinet, clock distribution circuit and system applied to quantum computing belong to quantum computing technical field;High-precision clock source is used to synchronize output high-speed clock signal and low-speed clock signal, ensure the synchronization of low-speed reference clock and high-speed sampling clock of multiple cabinets, multiple board cards;Independent clock distribution board card is used, high-speed clock electrical signal is converted into high-speed clock optical signal by microwave modulation light source, after optical power amplification, optical beam splitter, it is distributed to the clock distribution board card of each cabinet by optical fiber, low-speed clock electrical signal is connected to the clock distribution board card of each cabinet by radio frequency cable;High-speed clock optical signal, low-speed clock electrical signal are input to clock distribution board card, then by clock distribution board card distribution to each control board card, reduce the number of PD detector, Buffer, PLL and amplification filtering module on clock signal transmission path, reduce cabinet space use pressure and cost.

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.

According to an embodiment of the present invention, a semiconductor manufacturing apparatus may comprise: a laser generator that provides a laser beam that melts a solder positioned between a substrate and a chip die, to bond the substrate and the chip die; an optical sensor configured to generate an optical beam having a different wavelength from that of the laser beam to measure a separation distance to the upper surface of the chip die; and a control unit which, when the separation distance exceeds a preset first reference value, determines that the solder is melted and controls operation of the laser generator.

Suppressing Stimulated Brillouin Scattering (SBS) in an Optical Amplifier system comprising: an optical fan out which splits a coherent optical beam into a set of multiple optical beams, a set of opti

A property of a waveplate at a plurality of locations across the waveplate is defined by, for each location, obtaining an expected angle of incidence of an intended incident optical beam at the respective location, and based at least in part on the expected angle of incidence, a goal output polarization for the waveplate, and at least one material property for a material of the waveplate, determining the property of the waveplate at the respective location. A representation of the property of the waveplate for each of the plurality of locations is provided. The waveplate is configured to modify a polarization of the intended incident optical beam that interacts with the waveplate to provide an output optical beam characterized by a goal output polarization via interaction of the intended incident optical beam with the waveplate based at least in part on the property of the waveplate.

An improved remote insect detector is disclosed. The detector includes a housing. The detector further includes an insect funnel passage located on an underside of the housing and dimensioned to retain a target insect in a detecting position and an optical beam detection circuit operable to detect the target insect in the detecting position.

The application provides a frequency-modulated continuous wave laser radar system and relates to the technical field of laser radar.The frequency-modulated continuous wave laser radar system comprises a laser, an arbitrary waveform generator, an upper computer, a collection card, a lens, a first optical beam splitter, a linearity correction unit and a detection unit.The linearity correction unit comprises a second optical beam splitter, a delay line, a first coupler and a first balanced detector.The detection unit comprises a third optical beam splitter, a coaxial transceiving grating, a second coupler and a second balanced detector.The frequency-modulated continuous wave laser radar system improves the signal-to-noise ratio and the energy efficiency of the edge field of view, uses the coaxial transceiving grating to replace the circulator, eliminates the near-distance detection blind area of the radar system caused by the internal reflection of the circulator, integrates the linearity correction unit, performs real-time correction or monitoring on the frequency modulation of the laser, enhances the stability of the radar system, and does not need to build any additional optical circuit.

An optical phase tuning device (1) is provided that comprises a beam splitter (3), a tunable gradient phase shifter (4) and a controller (6) for providing a single drive signal (Iheat) for resistively heating the resistive heating elements. The beam splitter (3) is configured to split a coherent optical beam into a series of individual coherent beams. The tunable gradient phase shifter (4) has a corresponding series of thermo-optical phase shifters (4b, 4c, 4d, 4e), each of which is configured to apply a respective phase shift to a respective one of the individual coherent beams. The thermo-optic phase shifters each comprise a respective resistive heating element (5b, 5c, 5d, 5e) having a mutually different width. The controller (6) provides a single drive signal (Iheat) for resistively heating the resistive heating elements. Therewith a respective phase shift is imposed to each of the individual coherent beams that is substantially inversely proportional to the squared width of the respective resistive heating elements.

The present invention provides an integrated interferometric optical gyroscope, assembly, system, and method for calculating rotational speed, the gyroscope comprising a light source module, a first coupling module, a second coupling module, at least two polarization-separated rotation modules, a photoelectric detection module, and a helical waveguide module, the two polarization-separated rotation modules each connected to the distal and proximal ends of the helical waveguide module, each converting two optical beams in a TE polarization state into two polarization states, TE and TM, transmitting them to both ends of the helical waveguide module, transmitting them in opposite directions within the helical waveguide module, receiving the two optical beams after they have passed through the helical waveguide module, and converting both polarization states back to the same TE mode, the gyroscope does not use a circulator or 50 / 50 coupler, avoids reflected light waves to the light source, and eliminates the influence of system errors, drift or disturbances, changes in ambient temperature, etc. on the performance stability of the gyroscope.

The invention discloses a photoelectric chip with power attenuation regulation and control and real-time monitoring functions. The photoelectric chip comprises a coupling waveguide, a connecting waveguide, a light beam splitting structure and a variable optical attenuator, an optical signal enters the chip through the input coupling waveguide and is transmitted to the optical beam splitting structure through the first connecting waveguide, the optical beam splitting structure divides the optical signal into a monitoring signal and a main transmission signal, and the monitoring signal is transmitted to the first variable optical attenuator through the optical beam splitting structure and the second connecting waveguide in sequence and then is connected to the photoelectric detection system through the monitoring output coupling waveguide. The main transmission signal is transmitted to the second variable optical attenuator through the optical beam splitting structure and the third connection waveguide in sequence, and then is transmitted back to the original optical fiber link through the main signal back-transmission coupling waveguide. The chip disclosed by the invention can be prepared on a large scale by adopting a standard micro-nano process, is low in coupling loss and high in compatibility, can be customized on a single chip or in an array manner, is accurate in monitoring and convenient to install, and can be widely applied to real-time monitoring and attenuation regulation and control of links in the fields of optical fiber communication, optical sensing and the like.

A light detection and ranging (LIDAR) system includes a beam collimator, a plurality of first lenses, a plurality of tunable lenses, and one or more optical sources to generate a plurality of optical beams. Each tunable lens may be disposed adjacent a respective one of the plurality of first lenses such that the respective one of the plurality of first lenses is between the tunable lens and the beam collimator. Each of the plurality of optical beams may pass through one of the tunable lenses and one of the first lenses towards the beam collimator. Each of the plurality of tunable lenses may be separately controllable by selectively applying voltage to the tunable lens to adjust a focal length of the tunable lens to compensate for a variation in focus positions of the plurality of first lenses.

The invention discloses a gradient refractive index lens-based beam shaping optical system and a design method thereof, the optical system comprises at least one divergent gradient refractive index lens and at least one convergent gradient refractive index lens, and the divergent gradient refractive index lens and the convergent gradient refractive index lens are combined and configured along the same optical axis. The arrangement sequence of the gradient refractive index lenses and the relative position relation of the gradient refractive index lenses in the optical axis direction are designed, so that the optical system forms an afocal light path structure on the whole. The optical system is used for carrying out transverse scale regulation and control on an incident light beam and realizing light beam expansion, light beam shrinkage and light beam shaping on the premise of keeping approximate collimation propagation characteristics of an output light beam. According to the structure, the thermal lens effect in high-power laser can be avoided, the stability and reliability of the system are improved, tight attachment, cascade expansion and direct coupling with optical fibers are supported, and miniaturization and integration application is facilitated.

This invention discloses a quartz crystal Y-type optical beamsplitter capable of nonlinear frequency conversion in the deep ultraviolet band, belonging to the field of optoelectronic device technology. It includes a quartz crystal with a Y-type ridge waveguide structure on its surface. The Y-type ridge waveguide structure includes an input arm, the end of which is connected to the beginning of two branch arms. Each branch arm is connected to an output arm parallel to the input arm. One output arm contains a periodic phase grating structure arranged along the light transmission direction of the quartz crystal. The periodic phase grating structure is composed of several single-cycle femtosecond laser-modified regions and several unmodified regions arranged periodically. The Y-type optical beamsplitter disclosed in this invention integrates optical beam splitting and nonlinear frequency conversion functions, allowing for the low-loss output of both a fundamental ultraviolet beam and a deep ultraviolet frequency-doubled beam from an input fundamental ultraviolet light beam.

A method of characterizing a device under test (DUT) includes illuminating the DUT with a broadband optical beam within an optical field of view (FOV), illuminating the DUT with an X-ray beam within an X-ray FOV overlapping the optical FOV, and concurrently acquiring X-ray metrology information, e.g., one or more X-ray images utilizing various modalities, such as absorption, phase contrast difference, darkfield, small angle X-ray scattering (SAXS) and / or fluorescence, from the X-ray FOV and a plurality of optical images of the optical FOV, each of the optical images corresponding to respective selected wavelengths of the broadband optical beam from each of ultraviolet, visible, and infrared wavelengths, for example including deep ultraviolet, near infrared, or short-wavelength infrared wavelengths. The DUT may be one or more substrates, e.g., stacked, and include electronic devices such as three-dimensional integrated devices.

The invention relates to a multi-parameter quantum dense sensing network device. The method mainly solves the technical problem that an existing quantum dense sensing network can only carry out combined measurement on a pair of non-alignment parameters at one position. According to the technical scheme, the device comprises a light source unit, two optical beam splitters, two optical beam splitter networks, three reflectors, three phase sensors, three amplitude sensors and two measuring systems. Compressed optical signals output by a first output end and a second output end of the light source unit are connected with two input ends of the first optical beam splitter, and three beams of coherent optical signals output by third to fifth output ends of the light source unit are respectively connected with a second input end of the reflector through the amplitude sensor and the phase sensor. Two beams of local oscillation light signals output by the sixth output end and the seventh output end of the light source unit are connected with the second input ends of the two measurement systems; and the first output end and the second output end of the second optical beam splitter are connected with the first input ends of the two measuring systems.

A low-latency free-space optical data communication channel with automatic alignment function has an optical channel, collimators, high reflective screens, and cameras. The optical channel can have two optical lenses designed to facilitate the transmission of an optical signal. The collimators can be integrated with optical fibers and precisely positioned at a focal point of the two optical lenses. Reflective screens, films or tapes encircle both transmitting and receiving lenses. Cameras at each transmitting and receiving terminal are positioned to monitor the optical signal's impact on a lens surface or a high-reflective screen on the opposite side. The cameras use at least one lens to get focused image on a camera sensor and records the optical beam spot impacting the opposite side. Corresponding LED(s) aligned with the lens position on the opposite side allow the computation of the disparity between the optical signal and the lens positioned on the opposite side.

A multiplexing adaptive optics method for deep-tissue imaging is provided, comprising: providing a first optical beam and a group of second optical beams, each with lower intensity and distinct modulation frequencies; combining the beams with temporal overlap to form a composite excitation beam; focusing the composite beam into a sample such that the second optical beams are laterally separated in the focal plane; detecting a signal excited by the composite beam; demodulating the signal with reference frequencies to compute phase and amplitude data at each modulation frequency and obtain a second signal; performing spatial measurements of the first beam relative to the second beams to derive down-sampled electric-field point spread functions; and merging the functions to reconstruct a full-sampled point spread function for identifying and correcting optical aberrations within the sample.

The invention belongs to the technical field of laser radars, and particularly discloses a multi-dimensional target motion state detection system and method. Comprising the following steps: applying a frequency modulation continuous wave signal to continuous laser to form a modulation optical signal, and superposing the modulation optical signal to a conjugate OAM mode, so that an output composite light beam has a linear frequency modulation characteristic and a spiral phase structure at the same time; performing optical beam splitting on the echo signal reflected by the target to respectively form a first channel signal and a second channel signal; performing beat frequency interference on the first channel signal and local reference light, and extracting a Doppler frequency shift component related to a target radial speed through coherent detection; performing direct detection on the second channel signal, and extracting a low-frequency beat frequency component related to a target angular velocity based on beat frequency interference between conjugate OAM modes; and respectively calculating the angular velocity and the radial velocity of the target based on the low-frequency and high-frequency spectrum decoupling. According to the invention, accurate decoupling of Doppler frequency shift of the composite moving target is realized, and the method has high real-time performance and high adaptability.