92 results about "Quasioptics" patented technology

An optical measurement device includes: a first align mark including at least one transmissive diffractive element; a second align mark apart from the first align mark in a first direction and including at least one reflective diffractive element; a beam splitter configured to reflect incident light in a direction toward the first align mark and transmit light from the first align mark; a focusing lens on a path of the light that passes through the beam splitter; and at least one image sensor configured to sense the light after the light passes through the focusing lens.

Disclosed is a system implemented in an enclosed space. The system includes light source(s); tracking camera(s); an optical combiner arranged on an optical path of a light field display unit and on an optical path of a real-world light field of a real-world environment; and processor(s) configured to: control the tracking camera(s) to capture image(s) of the enclosed space, whilst controlling the light source(s) to project light pattern(s) onto a semi-reflective surface of the optical combiner; detect, in the image(s), a reflection of at least a part of the light pattern(s) off surface(s) in the enclosed space, and determine a shape of said reflection; and determine a curvature of the optical combiner, based on shapes of at least said part of the light pattern(s) and the reflection.

The invention discloses a portable light intensity verification device, and belongs to the technical field of environment and meteorological monitoring. The portable light intensity verification device comprises a voltage-stabilized power supply, a light source and a shading sealing cover, and the voltage-stabilized power supply is connected with the light source through an electric wire, supplies power to the light source and controls the light intensity of the light source; the light source is a group of LED lamp beads, the shading sealing cover is made of a hot good conductor, a plurality of open holes are formed in the shading sealing cover, and the LED lamp beads are fixedly arranged on the inner wall of the shading sealing cover through the open holes. A heat dissipation assembly can be further arranged to promote heat dissipation of the shading sealing cover. In the process of measuring the photolysis rate of the gas in the atmosphere by a spectroscopic method, the optical receiving head is covered by the shading sealing cover provided with the LED lamp beads, and the spectrograph is subjected to simple, rapid and reliable field calibration or verification, so that the verification work can be carried out without a standard optical platform, and the characteristics of accuracy, convenience and the like are achieved.

An optoelectronic device (10) comprises a laser light-emitting component (100) and an optical component (200) with an optical waveguide (201). The laser light-emitting component (100) has a light-exit surface (120) for emitting the laser light and at least one first alignment structure (130) on a first end face (110). The optical component (200) has a light-entry surface (220) on a second end face (210) where the laser light can be coupled into the optical waveguide (201), and at least one second alignment structure (230).The first and second alignment structures (130, 230) are designed to be complementary to each other in order to align the laser light emitting component (100) to the optical component (200) in such a way that the light exit surface (120) and the light entry surface (220) are opposite each other, whereby the laser light is coupled into the optical waveguide (201) in the case of emission of laser light by the laser light emitting component (100).

The invention provides an overlay alignment optical measurement system and overlay alignment detection equipment, and belongs to the semiconductor overlay alignment amount detection technology, the overlay alignment optical measurement system comprises an illumination module, an image acquisition module, an automatic focusing module, a coupling light path module and a pre-alignment module; the overlay alignment detection equipment comprises a machine table, a movable carrying table, a measuring frame, a Z-axis driving module and an optical machine module. According to the invention, the pre-alignment light path is integrated on the basis of the self-focusing imaging light path, the overall measurement efficiency is improved, and the space occupation is reduced through the layout that the automatic focusing module is inclined and the light path side is offset; the measuring head is integrally arranged on the Z-axis driving module, so that the overall stability of the equipment is improved; and the two wafer fork grooves with different lengths are formed in the tray body, so that a wafer taking manipulator with fork handles with different lengths can be conveniently and quickly inserted, and the wafer replacement efficiency is improved. The method is convenient to popularize and apply in semiconductor overlay alignment, CD, defect and other nanoscale quantity detection scenes.

A system for aligning optical signals for optical networking includes a light station, a collimator element corresponding to the light station, a steering array including a steering element corresponding to the light station, and a set of optical transfer elements. The set of optical transfer elements is positioned between the steering array and the light station. The set of optical transfer elements forms a light image from a first plane positioned at a first location onto a second plane positioned at a second location.

The invention discloses a digital differential interference imaging method, and belongs to the technical field of optical imaging and microscopic imaging. The method comprises the steps that bright field illumination is used, a first image and a second image are collected at defocus positions which are vertically symmetrical on a sample focal plane respectively, and the defocus distance is larger than the physical depth of field of an objective lens; and carrying out pixel-level gray value subtraction on the two images to obtain a digital differential phase image. Digital image processing is adopted to replace optical shearing and interference of a traditional DIC, a polarized optical element and a special DIC prism are not needed, the system cost and complexity are remarkably reduced, the system can be compatible with non-standard optical material sample containers such as a plastic culture dish, and the directional shadow problem of the traditional DIC is solved. Meanwhile, by providing two specific implementation modes, namely accurate positioning acquisition and automatic focusing fusion acquisition, the imaging efficiency and the system robustness are further improved on the basis of ensuring the high contrast and the pseudo three-dimensional relief imaging effect.

The invention relates to the technical field of defect detection, and discloses a PEM fuel cell metal bipolar plate carbon-based composite coating defect detection method, which comprises: applying stepped thermal excitation to a bipolar plate carbon-based composite coating to obtain a plurality of temperature stepped points corresponding to the bipolar plate carbon-based composite coating; after each temperature step point is stable, generating an optical response data sequence according to the optical response data under each temperature step point; analyzing a thermal teratogenesis coefficient sequence corresponding to the temperature step point based on the reference optical characteristic data and the optical response data sequence; performing differential processing on the thermal teratogenesis coefficient sequence to obtain a gradient change curve, and analyzing inflection point features in the gradient change curve; and analyzing the defect evolution behavior of the bipolar plate carbon-based composite coating according to the inflection point characteristics, and detecting the defect type and defect grade of the bipolar plate carbon-based composite coating through the defect evolution behavior. According to the invention, the precision of PEM fuel cell metal bipolar plate carbon-based composite coating defect detection can be improved.

A quasi-optical beamformer includes a plurality N>1 of power feeds (PF), each of the i∈[1; N] power feeds (PF) being configured to emit a respective radio-frequency beam denoted Ri, a radio-frequency transmission line (LT) fed at a first end by the power feeds and comprising at a second end a plurality of network ports (PR) that are configured to collect radio-frequency radiation, the transmission line (LT) comprising a radio-frequency waveguide (GO) that comprises at least two metal plates (PM) that are stacked so as to guide the radio-frequency beams Ri, i∈[1; N] towards the network ports (PR), the transmission line (LT) extending along a central main axis denoted axis x, a first reflector (M1) having a first centre (C1) centred on the axis x and a first effective radius of curvature and being configured to reflect the guided radio-frequency beams Ri, i∈[1; N], a second reflector (M2) having a second effective radius of curvature and being configured to reflect the radio-frequency beams (RFi) reflected by the first reflector so as to direct them towards the network ports so as to form output radio-frequency beams (RSi), the first and second effective radii of curvature and an arrangement of the power feeds (PF) with respect to the first reflector being configured so that: each of the output radio-frequency beams (RSi) is a plane wave, and a transverse amplitude distribution Ai, on the network ports (PR), of each output radio-frequency beam (RSi), is substantially identical.

The utility model discloses an angle-adjustable range finder window lens testing support, which relates to the technical field of support testing and comprises a base, a rotating module and a clamping module. According to the technical scheme, the base is placed on the standard optical platform, so that the window lens clamped by the clamping module can be arranged relative to the distance measuring instrument, and the distance measuring instrument can be arranged by controlling the base to move on the standard optical platform along the optical axis or controlling the rotating module to move on the base along the extending direction of the fixing groove. The distance between the window lens and the range finder is adjusted by rotating the rotating module and / or the clamping module, the rotating angle of the window lens in a single direction or multiple directions is controlled to be adjusted, tests on different range finders can be simulated when the window lens is tested, and the final installation effect is accurately simulated. And the adaptation degree of the window lens is further improved.

The present disclosure relates generally to systems and methods for laser alignment, and more particularly to systems and methods for aligning optical elements to enable laser transmission. In some embodiments, the cover plate is configured to slide into position on the optics mounting plate. The positioning cover plate is to apply a force to the biasing element to press the optical element against the registration surface of the optical device mounting plate to align the optical element with the optical aperture. The cover plate may be fixed relative to the optic mounting plate to retain the biasing element and the optical element.

There is provided a method of calibrating an optical sensor (1) for measuring one or more physiological signs of a person after a device is attached to the person, the sensor comprising one or more detectors (15) and one or more light sources (12), (14). The method comprises the steps of, after the device is attached to the human body: emitting one or more light pulses of a plurality of different wavelengths using one or more light sources (12), (14) wherein each light pulse of each wavelength is emitted at a known power level and over a known length of time; using one or more detectors (15) to record signals for the light pulses of each wavelength to create an optical characteristic of the person; and selecting one or more of the plurality of wavelengths based on the optical characteristic of the person for use in measuring the one or more physiological signs.

This invention relates to the field of image processing technology and discloses a multimodal data fusion method for online quality monitoring of plastics. The method includes: simultaneously acquiring a reference optical image of the plastic surface and a temporal infrared thermal distribution image containing the current frame and the previous frame infrared image; calculating a spatial temperature gradient matrix; correcting the geometric affine matrix based on the displacement vector normal component determined by the dense optical flow field, constructing a spatiotemporal compensation mapping matrix to achieve alignment of heterogeneous pixel coordinate systems, and generating a structure-guided tensor; applying morphological opening operations to remove low-frequency background thermal fluctuations from the structure-guided tensor to obtain a pure-state high-frequency thermal gradient matrix; adjusting the diffusion coefficient using the pure-state high-frequency thermal gradient matrix as a constraint, applying anisotropic diffusion filtering to the reference optical image, and extracting defect regions. This invention achieves physical-level decoupling between optical artifacts and real defects, eliminates feature mapping deviations caused by thermal conduction hysteresis, and improves the signal-to-noise ratio of image feature extraction.

The invention relates to a machine difference control method and a standard optical system. The method comprises the following steps: carrying out flat field correction on a camera under different working distances; shooting an object to be detected under different flat field correction conditions, selecting a plurality of feature points and measuring to obtain corresponding first feature values; measuring feature points of the same picture and the same position of the to-be-detected object, determining measurement data, and selecting a working distance with the minimum deviation as an optimal calibration distance; selecting a first camera which is qualified in calibration as a reference template, shooting the high-uniformity optical integrating sphere and extracting second characteristic values of uniformly distributed point locations; and comparing the third feature value extracted by each camera with the second feature value, and determining that the corresponding camera is calibrated to be qualified under the condition that the maximum difference value in the third feature value and the second feature value conforms to a preset specification, otherwise, performing calibration again. The method can improve the calibration precision, and effectively controls the machine difference.

This invention discloses a method for comparing the size of multi-party semi-quantum secrets based on two-dimensional single-photon states. First, each participant shares a key and encrypts their own secret, maintaining the numerical relationship. A semi-honest quantum third party (STP) randomly prepares a two-dimensional single-photon sequence using a Z-based or X-based approach and distributes it to each participant. Each participant performs corresponding operations on each pair of adjacent photons according to the encrypted bit values ​​and sends the results back to the STP. The STP receives the returned photons and decodes them to obtain encrypted data strings. After security checks, the STP performs a bitwise XOR operation on each data string to determine the size relationship of the multi-party secrets. This invention uses experimentally easily prepared and manipulated two-dimensional single-photon states instead of high-dimensional or entangled states, requiring only standard optical devices, significantly reducing the implementation difficulty. By combining additive encryption with XOR comparison rules, it achieves size comparison while protecting privacy, solving the problems of difficult physical implementation and reduced security in existing methods. It has economical, efficient, and practical technical advantages.

The present application relates to the field of optical measurement, and provides a lithography machine interferometer light beam calibration device and method. The lithography machine interferometer light beam calibration device is used for calibrating a measurement light beam of an interferometric measurement system in a lithography machine, and comprises a reference optical element configured to establish an absolute angle reference in a calibration environment; a simulation target having at least one reflecting surface and configured to be detachably placed in the optical path of the measurement light beam during calibration; a reference transmission assembly configured to transmit the absolute angle reference defined by the reference optical element to the reflecting surface of the simulation target; and a diagnostic optical module configured to be detachably installed at the light beam outlet of the interferometric measurement system to receive the measurement light beam reflected by the reflecting surface of the simulation target; the diagnostic optical module interferes the received measurement light beam with an internal reference light beam of the diagnostic optical module, and uses the form of the formed interference fringes as a basis for judging the collimation state of the measurement light beam.

The invention discloses an identification method and related equipment for rapidly identifying a multi-modulus seed magnetic island, and relates to the field of magnetic confinement fusion plasma diagnosis. Wherein at least one group is used for switching observed circumferential positions in different time sequence segments through a waveguide switch in the quasi-optical transmission module. The method comprises the following steps: synchronously acquiring electronic temperature signals of two groups of microwave measurement subsystems at the same radial channel in a time sequence segment corresponding to different annular phase differences, carrying out time averaging on the electronic temperature signals, and judging and identifying a seed magnetic island corresponding to an annular modulus based on the same radial temperature difference and normalization, and further extracting a flat region based on the distribution of the electron temperature along with the radial channel to determine the width and the boundary position of the magnetic island. According to the invention, the rapid distinguishing and high-precision positioning of a plurality of annular modulus seed magnetic islands can be realized without adding extra detection channels.

The invention relates to the field of optical measurement, and provides a light beam calibration device and method for an interferometer of a photoetching machine. The light beam calibration device for the interferometer of the photoetching machine is used for calibrating a measurement light beam of an interference measurement system in the photoetching machine, and comprises a reference optical element which is configured to establish an absolute angle reference in a calibration environment; the simulation target is provided with at least one reflecting surface and is configured to be detachably placed in a light path of the measuring light beam during calibration; the reference transmission assembly is configured to transmit the absolute angle reference defined by the reference optical element to the reflecting surface of the simulation target; the diagnosis optical module is configured to be detachably mounted at a light beam outlet of the interference measurement system and is used for receiving the measurement light beam reflected by the reflecting surface of the simulation target; the diagnostic optical module interferes with the received measurement light beam and an internal reference light beam of the diagnostic optical module, and the form of formed interference fringes is used as a basis for judging the collimation state of the measurement light beam.

Optical device, method for calibrating an optical device, in particular data glasses (102), binoculars, a telescope, a microscope, a periscope, virtual reality glasses, mixed reality glasses, cycling glasses, diving goggles, a motorcycle helmet visor, protective goggles, or an ophthalmic examination device, wherein the calibration of the optical device is performed when, in particular, the optical device detects that a case (104) containing the optical device is being closed.

Method for aligning two oppositely arranged optical subsystems (12u,12u',12u'',12o,12o',12o'') of an optical system (11,11',11"), comprising the following steps: - Projection of alignment marks (9l, 9r, 9l', 9r') into an image plane (5u) of the first optical subsystem (12u, 12u', 12u''), - Projection of the alignment marks (9l,9r,9l',9r') from the first image plane (5u) onto a sensitive surface (14so) of the second optical subsystem (12o, 12o', 12o''), - Alignment of the optical subsystems (12u,12u',12u'',12o,12o',12o'') to each other, such that projections (9pl,9pr) of the alignment marks (9l,9r,9l',9r') are imaged at ideal positions (9il,9ir) in a depth of field area of ​​the sensitive surface (14so), characterized in that the alignment marks (9l, 9r) are applied directly to a first sensitive surface (14su) of a first camera chip (2u), wherein the alignment marks (9l, 9r) have a collection of non-functional pixels.

The invention discloses an optical tweezers device for single cell elasticity measurement, which is characterized by comprising an optical tweezers module, a microscopic imaging module, a sample cell displacement module and a control and display module which are jointly positioned on a standard optical bread board, a laser device in the optical tweezers module emits a laser beam which sequentially passes through a laser beam expanding device, a power adjusting device, a first reflector, a beam coupling lens, a second reflector, a precise pinhole, a beam splitter prism and a rectangular prism reflector, and the laser beam is focused at an image space focal plane of a first objective lens to form an optical trap for capturing single cells. The single cell is controlled to perform relative motion at a constant speed through the control and display module and the sample cell displacement module, the fluid resistance generated by the motion causes the single cell to deform, and the microscopic imaging module receives image information and observes the deformation degree of the single cell to measure the elasticity of the single cell. The device has the advantages that the mobility is good, and the acting force for applying deformation is controllable.

The present application relates to the technical field of spray head adjustment, in particular to a variable focus UV spray head automatic adjustment method based on deep learning, comprising the following steps: collecting a spray medium surface image and dividing the area, constructing a graph neural network node attribute, calculating a structural similarity score to match a focal length value, extracting an edge diffraction fringe to evaluate an error and outputting a preliminary adjustment instruction, combining historical control values to estimate acceleration and compare parameters, and executing backtracking reconstruction to generate displacement step adjustment instructions when exceeding. The present application structures the local area features of the spray medium surface image and introduces a graph structure similarity judgment, combines the mapping relationship between the diffraction fringe and the standard optical features to construct a focal length error inversion path, and introduces historical control quantities and time sequence constraints in the control output stage to correct the adjustment amplitude and direction within the spray head inertia boundary, so that the focal length adjustment process continuously matches the actual state of the spray, and the adjustment stability and adaptability are improved.

The invention discloses multifunctional optical thin film detection equipment, and relates to the technical field of optical material detection. Comprising an equipment body, a uniform backlight source, a reflection type brightness enhancement film assembly, a multifunctional measuring jig and a handheld spectrum color illuminometer, the uniform backlight source is arranged on the equipment body and connected with an equipment cover through a hinge, and the multifunctional measuring jig is inserted into the uniform backlight source; a reflection type brightness enhancement film assembly or a standard optical film is arranged above the multifunctional measuring jig, and a containing groove for containing a handheld spectrum color illuminometer is formed in the side edge of the equipment body. According to the birefringence detection device and method, through the multiple polarization circulation effect of the reflection type brightness enhancement film, polarization changes caused by birefringence of the film to be detected are amplified and converted into measurable brightness differences, and low-cost and high-sensitivity detection of the birefringence degree of optical films such as BOPET is achieved. Meanwhile, switching between white light and blue light is supported, various optical film testing requirements are met, and the advantages of integration, damage prevention, easy and convenient operation and the like are achieved.

This invention belongs to the field of dimensional detection technology, specifically a multi-laser-beam coordinated overall dimensional detection device for porcelain insulators. It includes a support frame; a detection component; a U-shaped frame mounted on the support frame; a displacement U-block connected to the side of the U-shaped frame; a displacement U-block equipped with a transposition actuator; and a control clamping assembly on the U-shaped frame. The transposition actuator includes a positioning groove disposed within the U-shaped frame; a positioning slider is fitted within the positioning groove, and the two slide in cooperation; a positioning ring is mounted on the positioning slider; the detection component is located within the positioning ring, with their central axes aligned; and the control clamping assembly includes a drive source mounted on both sides of the U-shaped frame. This invention solves the problem of large-area voids in point cloud data caused by the downward tilting structure of the umbrella skirt, and enables accurate optical calculation of the umbrella skirt area, significantly improving the accuracy of umbrella skirt area calculation and overall dimensional detection.

The invention provides a local oscillation noise suppression device for a superconductive tunnel junction mixer, and belongs to the technical field of terahertz detection. The device comprises a local oscillator signal source, a local oscillator light path, a superconductive tunnel junction mixer and a quasi-optical filter. The local oscillator signal source provides a local oscillator signal to the superconductive tunnel junction mixer through a local oscillator light path; the quasi-optical filter is located between the local oscillator signal source and the local oscillator light path and used for attenuating local oscillator power and reducing reflection of signals in the local oscillator light path. The quasi-optical filter is formed by machining an integrated metal plate, circular grooves are formed in the symmetrical positions of the two sides of the metal plate, and through holes are formed in the centers of the grooves and serve as attenuation windows. The environment adaptability is high, and normal-temperature / low-temperature stable work is supported; signal reflection and sideband noise are effectively suppressed by the composite design of the conical structure and the black body absorbing coating; and realizing accurate power matching based on a Gaussian beam theory.

The invention discloses a thermal coherence scattering system for measuring the ion temperature of a magnetic confinement fusion device, and relates to the technical field of magnetic confinement fusion plasma microwave diagnosis, and the system comprises a gyrotron which is used for generating a millimeter wave light beam; the quasi-optical matching unit is arranged at the output end of the gyrotron and is used for converting the millimeter wave light beam into a TEM00 mode and coupling the millimeter wave light beam into the metal corrugated circular waveguide in an HE11 mode; one of the three metal corrugated circular waveguides is installed at the output end of the quasi-optical matching unit, the two adjacent metal corrugated circular waveguides are connected through a rotatable polarizer elbow, and the two rotatable polarizer elbows jointly form a rotatable polarizer; according to the thermal coherence scattering system for measuring the ion temperature of the magnetic confinement fusion device, a metal corrugated circular waveguide is adopted for transmission. The advantage that the metal corrugated circular waveguide is used for transmission is that the waveguide has a shielding effect, and an additional shielding mode does not need to be considered.

A method of calibrating an optical detector includes installing a calibration system within at least one sensing volume of the optical detector, filling a chamber of the calibration system with a material to achieve a known obscuration, and measuring an obscuration of the material within the chamber.