64 results about "Test beam" patented technology

The invention relates to the technical field of optical element surface shape dynamic measurement scheme design, in particular to an element surface shape dynamic measurement system based on a metasurface. According to the scheme, polarized light emitted by a laser is split into reference light and test light, the test light passes through a quarter-wave plate twice to realize polarization orthogonalization, and the test light is combined with the reference light to form elliptically polarized light; synchronously capturing component intensities of left-handed / right-handed circular polarized light and orthogonal line polarized light by using a detector, and resolving a phase difference delta in real time by combining a Stokes parameter; environmental interference is eliminated based on a common-path design, a polarization beam-splitting element is omitted, and the architecture is simplified; accurate dynamic measurement of the surface shape of the measured piece is realized by deducting the inherent surface shape error of the system. The system provided by the invention has the advantages of strong anti-interference performance, high measurement efficiency, remarkable cost reduction and the like, and is suitable for precise optical manufacturing and on-line detection scenes.

The present invention relates to an optical modulation system based on the interaction of two collinear light beams having different wavelengths passing through a cuvette containing a solution of Cs2SnI6, comprising a pumping laser emitter emitting a modulated pumping beam with a wavelength between 355 nm and 1550 nm and with a variable frequency; a test laser emitter emitting a continuous wave test beam at 633 nm and with a power limited to 10 mW; a beam splitter where the pumping and test beams are combined to strike on the cuvette; a pass filter that removes the signal from the pumping beam; a spatial analysis camera; a time / frequency analysis equipment with a photodetector, a commercial lock-in amplifier and an oscilloscope; and a signal generator.

The invention discloses an array optical waveguide detection system and method, and the system comprises a light source which is used for transmitting a test light beam, transmitting the test light beam to a waveguide substrate, enabling the test light beam to enter an array optical waveguide through a first surface and then to be transmitted to an array spectroscope, the light is emitted to the second surface after passing through the array spectroscope; the detection assembly is used for receiving the test light beam emitted from the second surface so as to detect the parallelism of the array spectroscope; the incident angle of the test light beam emitted to the waveguide substrate is theta, theta = arcsin (n.sint), t meets: t is the refraction angle of the test light beam entering the waveguide substrate through the first surface, n is the refractive index of the waveguide substrate, and alpha is the included angle between the array spectroscope and the first surface. According to the array optical waveguide detection system, the measurement precision of the detection system can be improved.

The application discloses a kind of ultra-long curvature radius convex spherical surface shape measurement systems, the surface shape measurement system includes interferometer, spherical standard mirror, aberration compensation lens and the convex spherical mirror to be measured in same optical axis, the aberration compensation lens is concave on the side of the convex spherical mirror to be measured;Light beam emitted by interferometer, part is reflected back to interferometer by spherical standard mirror, forms reference beam, another part passes through spherical standard mirror, aberration compensation lens, is irradiated on the convex spherical mirror to be measured, is reflected twice by the convex spherical mirror to be measured, finally, it is back to interferometer by aberration compensation lens, spherical standard mirror, forms test beam;Reference beam and test beam interfere, form interference fringe, obtain the surface shape error of measured surface by analyzing interference fringe.The application solves the problem that the size of detection equipment is large, the cost is high and difficult to realize in prior art for detecting ultra-long curvature radius convex spherical mirror surface shape.

A method and an apparatus for calibrating an array path of a beam forming test equipment for a base station, includes enabling a beam forming-related interlocking test of a base station and a test equipment by compensating for distortion of the beam forming characteristics of the base station incidentally caused by the connection between the base station and the test equipment by using a specific signal transmitted from the base station, when test equipment such as a channel simulator is used to test beam forming of a base station.

The invention discloses an optical axis registration system and method for a large-scale optical system with limited installation and adjustment space. The system comprises a front optical machine system of which emergent light is parallel light and a rear optical machine system of which incident light is parallel light, the front optical machine system comprises a front optical machine system optical axis marking mirror, and the rear optical machine system comprises an electric control reflex mirror and a rear optical machine system optical axis marking mirror; an auxiliary optical calibration component is placed in a butt joint optical path of the front optical machine system and the rear optical machine system, and an autocollimator is further arranged, wherein the optical axis of a test light beam emitted by the autocollimator is perpendicular to the butt joint optical path of the front optical machine system and the rear optical machine system; the auxiliary light correction component comprises a first parallel plate, a first 45-degree reflector, a second 45-degree reflector and a second parallel plate. A first 45-degree reflecting mirror and a second 45-degree reflecting mirror which form an included angle of 90 degrees are arranged between the first parallel flat plate and the second parallel flat plate which are arranged in parallel. According to the invention, high-precision registration of the optical axes of two large-size and large-mass large optical systems can be realized under the condition that the installation and adjustment space is limited.

This invention discloses a tilted wavefront sub-aperture stitching interferometric detection method based on a spatial light modulator, relating to the field of optical detection. Light emitted from a laser is collimated and expanded before being incident on a polarizing beam splitter; the reflected light serves as a reference beam, and the transmitted light as a test beam; the test beam is incident on a spatial light modulator, and after phase modulation by the spatial light modulator and passing through a lens, it forms standard spherical waves with different tilt angles, allowing for zero-position detection of sub-apertures divided into different regions. Using a spatial light modulator as an ideal point source array generator in conjunction with an imaging lens can generate the required ideal tilted spherical waves for different test parameters, offering strong versatility compared to traditional point source generators. Furthermore, for large-aperture complex curved surfaces, sub-aperture stitching can be achieved without moving the interferometric device, reducing errors introduced by mechanical movement.

The invention relates to an alignment device for aligning an optoelectronic sensor, comprising at least one transmitting channel for emitting a test light beam and at least one receiving channel for receiving a test light beam emitted by an associated transmitting channel. The at least one transmitting channel includes a light source for generating the test light beam. The at least one receiving channel includes a light receiver and a receiving optics arrangement for focusing the received test light beam onto the light receiver. In at least one receiving channel, a receiving filter is provided upstream of the light receiver, which has a transmission profile with a transmission gradient and is arranged such that the received test light beam passes through different sub-regions of the receiving filter depending on its angle of incidence into the receiving channel.The invention further relates to a corresponding alignment device with a transmitting filter, a method for aligning an optoelectronic sensor and an optoelectronic sensor with an alignment device according to the invention.

The invention discloses an adjustable bending-torsion ratio loading device for a beam member and an installation and loading test method thereof. The device comprises two sets of clamping upper cross beams and clamping lower cross beams which are arranged symmetrically; the two sets of bent upper cross beams and bent lower cross beams are arranged in an anti-symmetric manner; a movable spherical hinge support is arranged on the upper surface of the bending and twisting upper cross beam, and the upper portion of the spherical hinge support is connected with an electro-hydraulic servo actuator; the bottom of the clamping lower cross beam is connected with an arc slide way support with a limiting function. According to the loading device and the loading method, the loading arm and the loading point of the electro-hydraulic servo actuator can be changed, a test beam composite action loading test with any different bending-torsion ratio parameters can be carried out, and the stability of the test device under the large-angle and large-deformation loading condition can be effectively realized by utilizing the spherical hinge support; the measuring device records an elastic-plastic load displacement curve in the whole process. The device is particularly suitable for bending and torsion test loading of thin-wall section steel box girders and steel-concrete combined box girders which are small in bending and torsion rigidity and large in torsion deformation.

This invention relates to the field of engineering life prediction technology, and particularly to a method and equipment for determining fatigue damage in corrugated steel web composite box girders. The invention acquires strain at local locations on the corrugated steel web using strain gauges, constructs strain response curves, determines the strain-transmitted damage characterization vector by comparing the vector directions of the crack propagation tendency characterization vector, and obtains several load output explicit cycle numbers by comparing and analyzing the strain response curves corresponding to local webs with each explicit tendency with a strain response reference curve. Finally, the maximum load-bearing cycle number of the test beam is determined and recorded. This invention implements the above steps by setting up a test bench, measurement module, feature analysis module, feature extraction module, and recording module. Furthermore, it achieves the correlation between the multi-directional geometric features of the corrugated steel web and the strain response differences in different damaged areas, accurately determining the maximum load-bearing cycle number and improving the accuracy of fatigue damage assessment.

The disclosure provides an electric-optical crystal light passing surface normal and crystal optical axis angle measuring device, comprising: a laser (1) for generating a test light beam; an optical shaping module for shaping and expanding the test light beam; a conic interference module for adjusting the polarization degree of the shaped and expanded test light beam, and adjusting the test light beam into a conic light beam acting on the measured electric-optical crystal; a sample posture adjusting assembly (8) for setting the measured electric-optical crystal, and adjusting the rotation angle of the measured electric-optical crystal in three-dimensional space; a collimation imaging module for focusing the test light beam emitted after passing through the measured electric-optical crystal; a first detection module (11) for receiving the test light beam emitted after passing through the measured electric-optical crystal to obtain the optical axis exposure point; and a measurement and calculation module for calculating the angle between the light passing surface normal of the measured electric-optical crystal and the crystal optical axis.

One method involves generating a source beam of heterodyne light directed at a test layer such that the source beam strikes the test layer at a first angle of incidence. The source beam is polarized, creating a reference beam. A portion of the source beam reflected by the test layer is also polarized, creating a test beam. Intensity signals of the reference beam and test beam are measured. A phase difference between the intensity signals of the test beam and the reference beam is determined. Based on this phase difference, the refractive index, extinction coefficient, and thickness of the test layer are calculated.

The invention discloses a testing device and a testing method of the testing device, and belongs to the technical field of light beam quality testing. The testing device is used for testing a target light beam quality analyzer, the testing device comprises a mounting platform, a laser, a light splitting element and a reference light beam quality analyzer, and the laser is rotatably arranged on the mounting platform; the light splitting element is used for splitting output light of the laser into a first test light beam and a second test light beam, so that the target light beam quality analyzer receives the first test light beam and forms a first test light spot; the reference light beam quality analyzer is used for receiving the second test light beam and forming a second test light spot; wherein the rotation axis of the laser is parallel to the output light, and the test light spot and the reference light spot are both elliptical. Time and labor are saved, the testing efficiency and the testing flexibility can be improved, the testing cost is reduced as much as possible, and the testing process is simplified.

The utility model discloses a friction loss testing device based on an electromagnetic elastic type absolute stress sensor, which comprises a prestressed steel beam, a prestressed test beam, an electromagnetic elastic type absolute stress sensor and a magnetoelastic cable force demodulation device, the electromagnetic elastic type absolute stress sensors are fixedly arranged outside the prestressed pipeline, at least one set of electromagnetic elastic type absolute stress sensors are arranged at the first end of the prestressed pipeline, at the second end of the prestressed pipeline and between the two ends of the prestressed pipeline, and the multiple sets of electromagnetic elastic type absolute stress sensors are used for conducting multi-point-position prestress detection on the prestressed steel beam. The comprehensiveness and the fineness of prestress data acquisition can be improved; the electromagnetic elastic type absolute stress sensor is fixed outside the prestressed pipeline and is not in contact with the steel beam, when the prestressed steel beam is tensioned or grouted, the electromagnetic elastic type absolute stress sensor cannot be additionally pressed and damaged, meanwhile, a grouting material and a beam body pouring material cannot affect the sensor, and the detection precision can be ensured.

This invention belongs to the field of photodetector technology, specifically disclosing an automatic testing system and method for a four-quadrant APD component. The system includes: a temperature-controlled chamber providing a controllable temperature testing environment; an optical unit generating a stable test beam with adjustable intensity; a fixing fixture installed inside the temperature-controlled chamber, where the device under test (DUT) is installed during testing, and the fixture can be adjusted to switch between different quadrants, allowing the light source to switch between different photosensitive surfaces of the DUT; and a measurement and control unit including a bias power supply, an oscilloscope, a picoammeter, a temperature control and acquisition module, and a host computer. This system, by integrating a temperature control unit, a precision mechanical alignment structure, multi-parameter measurement hardware, and host computer control software, achieves automated, high-precision, multi-parameter testing of APD four-quadrant components across the entire temperature range, significantly improving testing efficiency and reliability.

The utility model relates to the technical field of reinforced concrete beam torsion test supports, in particular to a reinforced concrete beam torsion test support which comprises two underframe assemblies, the upper ends of the underframe assemblies are detachably connected with a bearing plate, the upper end of the bearing plate is provided with a ball assembly, the upper end of the ball assembly abuts against a steel plate piece, and the upper end of the steel plate piece abuts against a steel plate. A torsion support abuts against the upper end of the steel plate piece, a clamping mechanism is installed at the upper end of the torsion support, and a rolling shaft is arranged in the clamping mechanism. The vertical load is converted into the torque through a more economical and reasonable method, the size design needs to meet the requirement that the circle center of a rotating arc coincides with the centroid of the beam section, it is guaranteed that the test beam is in a pure torsion state all the time in the loading process, meanwhile, the test piece can freely stretch out and draw back in the long-axis direction, and the test efficiency is improved. The test device can be adjusted according to the size of the beam, is more flexible and portable, and can be installed manually.

The invention provides a marine detachable material crane test device which comprises at least six flange bottom plates arranged in an array at equal intervals, each flange bottom plate is provided with a stand column, flange cross beams are arranged between the stand columns which are transversely arranged, the lower portions of the flange cross beams are provided with flange transition bases, and the flange transition bases are connected with the stand columns. A connecting line between bottom center points of the flange transition bases has a first angle relative to the horizontal plane, a test beam is arranged below the flange transition bases, the test beam has a second angle relative to the horizontal plane, the first angle is equal to the second angle, a translation material crane is arranged at the lower part of the test beam, and the translation material crane is connected with the test beam. The translation material hanger has a third angle relative to the horizontal plane, and the third angle is equal to the second angle, so that the technical effects of convenience in installation and diversified test angles are realized.

This application provides an in-situ testing system, comprising: a light source including a Raman laser emitter, a heated laser emitter, and an X-ray emitter; an emission optical path for directing a first Raman test beam and a first heated test beam to a first position on the front side of the sample, and directing a second Raman test beam and a second heated test beam to a second position on the back side of the sample; the sample being located within a diamond anvil cell; a receiving optical path for directing a first Raman reflected beam, a first heated reflected beam, a second Raman reflected beam, and a second heated reflected beam to a spectrometer; a spectrometer for determining the pressure and temperature parameters of the front and back sides of the sample; and a detection device for receiving diffraction signals and determining the lattice parameters of the sample based on the diffraction signals. This in-situ testing system integrates Raman testing, heated laser testing, and X-ray testing into one unit, enabling the acquisition of pressure, temperature, and lattice parameters on both sides of the same sample location.

The invention provides a point diffraction phase-shifting interference measurement system and method based on polarization focusing light splitting, and the system comprises a polarization focusing light splitting unit which is used for separating an incident light beam according to a circular polarization state and focusing the incident light beam to different space focusing positions; the wavefront modulation unit is arranged at the spatial focusing position, the wavefront modulation unit comprises a first light through hole and a second light through hole, the first light through hole is used for converting one separated incident light beam into a reference light beam, and the second light through hole is used for allowing the other separated incident light beam to pass through and is recorded as a test light beam; and the polarization phase-shifting detection unit is used for acquiring interference intensity information of a combined light beam of the reference light beam and the test light beam in different polarization directions. The technical problems that an existing point diffraction interference measurement technology cannot achieve synchronous phase shifting and the contrast ratio of interference fringes is low are solved, the contrast ratio and the resolving precision of the fringes in the point diffraction interference measurement technology are greatly improved, and the resolving speed is higher.

The invention belongs to the field of shear resistance testing, and particularly relates to a self-balancing type bridge loading device testing method. Comprising the following steps: transforming a retired n-shaped composite beam into a loading table, determining the position of a shear test beam according to test requirements, placing a cushion block and a pressure sensor at a loading point, and installing a counter-force supporting system and a loading control system. High-performance concrete is poured into the composite beam, and a steel anchor box is welded to the stiffening position; determining the position of the test beam on the loading table according to the position of the loading point, and hoisting and placing; the cushion block at the loading point is used for force transmission, and the pressure sensor collects data. One side of the counter-force supporting system is designed to be of a single-door type structure, the other side of the counter-force supporting system is designed to be of a double-door type structure, and transverse and longitudinal changes of a loading point can be adapted by moving a distribution beam and a jack. And finally, loading is carried out through the loading control system, and loading data is collected in real time through the collection system. The installation and test method provided by the invention is low in test cost, convenient to operate and flexible in loading.

The application provides a joint bending stiffness calculation method, an electronic device and a storage medium. The method comprises the following steps: when a test beam is subjected to graded loading, the joint opening amount of the node area of the test beam and the actual strain of the anchorage reinforcement in the non-node area of the test beam under different load states are measured respectively; the structure parameters of the test beam are obtained, and the bond slip amount of the non-node area under different load states is calculated respectively according to the structure parameters and the actual strain; and the joint bending stiffness is calculated according to the bond slip amount and the joint opening amount. The application can improve the calculation accuracy of the joint bending stiffness of the anchorage joint.

The invention relates to the technical field of gas monitoring, and discloses a laser methane dust interference resistance detection method and system based on dual-light-path collaboration, and the system comprises an open light path module, a closed light path module and a drive circuit module; the closed light path module comprises a spectroscope and a trapezoidal air chamber; the driving circuit module comprises a DFB laser, a first photoelectric detector and a second photoelectric detector; the DFB laser emits laser, the laser enters the closed light path module after being reflected by the open light path module, the closed light path module divides the laser into a test light beam and a reference light beam, and the test light beam is transmitted to the first photoelectric detector. According to the laser methane dust interference resistance detection method and system based on dual-light-path cooperation, the reference light path can be used for locking the position of a gas absorption characteristic, common-mode noise caused by dust can be reduced through dual-light-path absorbance signal elimination, and the dust interference influence is relieved from the aspect of signal demodulation.

The application discloses a kind of test device and testing method for small and medium span bridge field bearing performance test.It relates to the technical field of bridge engineering, including: counter-force beam, bottom is equipped with lower anchor beam, both ends of lower anchor beam are arranged on counter-force beam by lower anchor beam anchoring device, the top of counter-force beam is provided with support beam, the top of each support beam is equipped with hinged support;Positioning beam is arranged on counter-force beam;Test beam is arranged on hinged support, and loading distribution beam is arranged on test beam;Loading anchoring beam is arranged above loading distribution beam, loading jack is arranged between each loading anchoring beam and loading distribution beam, and both ends of each loading anchoring beam are equipped with loading anchoring beam anchoring device;The fine rolled threaded steel bar is sequentially connected with loading anchoring beam anchoring device, positioning beam anchoring device and lower anchor beam anchoring device.The application is suitable for the device and method for quickly testing the bearing capacity of the old beam to be demolished, the beam to be used after reinforcement and the newly produced beam body on the construction site.

The application provides a beam management method, device, system and storage medium, aiming to improve the resource utilization rate during beam management. The beam management method of the application comprises: sending first information, the first information being used for indicating an activated target TCI-State, the target TCI-State being used for indicating quasi co-location (QCL) information of a target reference beam, the target reference beam being determined based on a to-be-tested beam; scanning the target reference beam; and receiving a real-time signal quality parameter of the target reference beam, the real-time signal quality parameter of the target reference beam being used for calculating a real-time signal quality parameter of the to-be-tested beam. The first communication device can pre-configure the target TCI-State used for indicating the QCL information of the target reference beam to the second communication device, so that frequent signaling transmission is not required during the beam measurement process, the signaling overhead of the beam management is reduced, and the resource utilization rate during the beam management is improved.

The invention discloses an external cavity laser, a packaging method thereof and a light quantum computer. The packaging method of the external cavity laser comprises the following steps: reversely conveying a first test light beam to an output light port of the external cavity chip, leading at least one part of the first test light beam out of the external cavity chip by using the light leading-out structure, and coupling the light output assembly and the external cavity chip according to the light power of the light beam led out by the light leading-out structure. And then a second test light beam is emitted to the input light port of the outer cavity chip by using the light source assembly, and the light source assembly and the outer cavity chip are coupled according to the magnitude of the light power output by the light output assembly. The light beam led out by the light leading-out structure does not pass through the external cavity filter, so that the wavelength of the first test light beam is not required, tuning is not needed, and the cost is saved. In the coupling process of the light source assembly, the gain chip is a wide-spectrum light source and still has good optical power output even if passing through the external cavity filter, monitoring is convenient, and the coupling alignment precision can be guaranteed.

A device and method for measuring the decentration of optics under test is provided. The device comprises a rotational spindle for loading and rotating the optics under test, a light source module for providing incident light beam to the optics under test, and a wavefront sensor for receiving testing light beams with different exposures from the optics under test at a plurality of azimuthal directions.

A polarization interferometer is configured to rapidly and accurately characterize a test object, particularly the surface roughness of the test object. The polarization interferometer includes an illumination source that generates light having multiple wavelengths. The light is split into two orthogonally polarized beams, including a reference beam and a test beam, and the test beam is incident on and returned from the test object. The reference beam and the test beam are combined into a combined beam. At least one spectral filter separates the combined beam into two spectral channels with different center wavelengths. Two pixelated polarization phase sensors simultaneously capture images of the two spectral channels and generate a phase map that can be used to measure properties of the test object.

An apparatus for measuring vertical displacement of a test beam under force application includes a support structure extending vertically parallel to a vertical axis, a grip configured to hold the test beam in a horizontal axial orientation, a force measurement cell having a sensor tip, a first movement system attaching the force measurement cell to the support structure operable to vertically move the force measurement cell to apply a force to the test beam through the sensor tip, a displacement measurement device having a plunger in fixed connection with the force measurement cell, and a second movement system connecting the displacement measurement device to the support structure to vertically move the displacement measurement device relative to the support structure and the force measurement cell.

A precision dual-beam parallelism detection device is disclosed for detecting the parallelism of a first test beam and a second test beam arranged parallel to each other with a distance L between them. The device includes an autocollimation angle measurement unit comprising a focusing lens and a photoelectric position detector located on the same optical axis. The photosensitive surface of the photoelectric position detector is located at the focal plane of the focusing lens. The focusing lens and the photoelectric position detector are mounted on a multi-degree-of-freedom attitude adjustment mechanism. The beam steering unit is a cornerstone prism used to deflect either the first or second test beam by 180° before it enters the focusing lens. The cornerstone prism has a first mounting point and a second mounting point, the center of which is located on the optical axis of the focusing lens. This invention features a simple optical path, wide applicability, and utilizes differential measurement to eliminate zero-position errors, achieving high-precision dual-beam parallelism measurement.

The invention discloses an optical cavity adjusting system and method, and the optical cavity comprises a first cavity mirror and a second cavity mirror. The adjusting system comprises a light source, a beam splitting unit, a collimation unit, a pose adjusting unit, an imaging unit and a control unit. The light source is used for emitting test beams; the beam splitting unit is used for splitting the test beam into a first test beam and a second test beam; the collimation unit is used for modulating the first test light beam and the second test light beam to coincide; the pose adjusting unit is used for adjusting the poses of the first cavity mirror and the second cavity mirror; the imaging unit is used for imaging the test light beam; and the control unit is used for controlling the pose adjusting unit to adjust the poses of the first endoscope and the second endoscope according to the imaging pattern. In the embodiment of the invention, the optical adjusting system is built, and the pose adjusting units are respectively arranged on the first cavity mirror and the second cavity mirror, so that an automatic adjusting process is realized, the precision and the accuracy of cavity mirror adjustment are improved, and the difficulty of optical cavity adjustment is reduced.