39 results about "Polarization plane" patented technology

A system for millimeter RADAR object recognition and classification using sub-band frequency interference and resonance effects from primary targets signals and reflected signals from secondary target preferably in the form of Wideband Chaos Generating Material (WCGM) objects, preferably detecting frequency dependent absorbing material, frequency dependent resonance effects from the second and primary target objects, frequency signal resonance effects caused by water molecule dipole effects in different sugar solutions, impedance of material, shape of metamaterial, and interference effects due to combination of signal sources resulting in a wider range of transmitter and scanning frequency band for RADAR based interrogation of target objects. The RADAR system makes opportunistic use of traditionally seen problematic interference signals, as extra signal sources providing extended range and frequency bandwidth for frequency-based interrogation of target object signatures in a frequency-intensity plane, a frequency-polarization plane, and a frequency-phase shift plane for doppler effects.

The application provides a unit-level inclined polarization ultra-wideband rectangular grid array antenna. Each antenna unit adopts a two-dimensional symmetrical structure composed of a horizontal polarization plane and a vertical polarization plane, the structure of the horizontal polarization plane and the vertical polarization plane is consistent, and the horizontal polarization wave and the vertical polarization wave are self-synthesized through one port; each plane of the antenna unit is composed of a feeding matching part and a radiation cavity part, the structure is simple, the unit-level inclined polarization radiation characteristic can be realized, and the array is a regular rectangular grid. The array antenna of the application can cover more than 9 times of the frequency, and can realize two-dimensional ±45° beam scanning in the working frequency range under the premise of sufficient array scale.

The application provides a dual-polarized planar tightly coupled array antenna, wherein the antenna unit comprises a metasurface matching layer, a radiator and a metal floor, the upper surface of a radiation plate in the radiator is provided with a cross-shaped boss fixed with the metasurface matching layer, and the metal floor is fixed with a metal wall composed of two cross metal plates, the upper end of the metal wall penetrates through the radiation plate and is connected with the metasurface matching layer, and the antenna works through exciting the connecting slot gap formed between adjacent radiators. The gap formed by the cross-shaped boss and the upper end of the metal wall can be equivalent to a capacitive load to offset the inductance generated at low frequency, the metal wall can break the original loop mode resonance, the radiation plate avoids the introduction of common mode resonance, the bandwidth at low frequency is widened, meanwhile, the metasurface matching layer can transform the impedance between the radiator and the free space, the impedance stability during wide-angle scanning of the antenna is improved, and the structure is simplified.

A thin optical device having high light utilization efficiency and less chromatic aberration and a small electronic device including the optical device are provided. The thin optical device includes a first reflective polarizing plate, a lens, an optical rotator, a retardation plate, and a second reflective polarizing plate. The optical device can be a thin optical device by rotation of the polarization plane of linearly polarized light with the optical rotator and utilization of a property of selectively reflecting circularly polarized light of the second reflective polarizing plate. Furthermore, the optical device does not use a half mirror and thus has a property of high light utilization efficiency. When the second reflective polarizing plate has a layered structure, chromatic aberration of an optical system can be reduced.

The present application provides a laser processing device that can accurately confirm the state of a processing groove formed on the front surface of a wafer. The laser processing device includes a main photographing unit and an auxiliary photographing unit that photograph a region to be subjected to laser processing. The auxiliary photographing unit includes an objective lens, a camera that generates an image via the objective lens, a half mirror disposed between the camera and the objective lens, a light source that illuminates a wafer held by a chuck table via the half mirror and the objective lens, a first polarizing plate disposed between the camera and the half mirror, and a second polarizing plate disposed between the light source and the half mirror. The second polarizing plate is disposed in such a manner that the polarization plane of light emitted from the light source and reflected by the half mirror through the second polarizing plate becomes a state in which it is rotated by a desired angle with respect to the polarization axis of the first polarizing plate.

The invention discloses a millimeter wave dual-circular polarization multi-beam antenna based on a polarization grating lens. The millimeter wave dual-circular polarization multi-beam antenna comprises a dielectric polarization grating lens and a millimeter wave + / -45-degree dual-linear polarization antenna array. According to the multi-beam antenna, a + / -45-degree dual-line polarization planar antenna array is used as a feed source and is placed on a horizontal focal plane of a dielectric polarization grating lens, and dual-circular polarization beam scanning is realized by exciting different ports of the feed source array. Each perforated column in each layer of the dielectric polarization grating lens has dielectric constants in radial gradient distribution and anisotropy in horizontal and vertical directions, and can convert + / -45-degree dual-linear polarization into dual-circular polarization while converting spherical waves into plane waves to improve antenna gain. The planar lens and the polarization grid structure are integrated, the system size is effectively reduced, + / -50-degree dual circular polarization beam scanning is achieved, the axial ratio bandwidth reaches 21.8% (24.5-30.5 GHz), and the maximum gain reaches 19.2 dBic.

A thin optical device having high light utilization efficiency and less chromatic aberration and a small electronic device including the optical device are provided. The thin optical device includes a first reflective polarizing plate, a lens, an optical rotator, a retardation plate, and a second reflective polarizing plate. The optical device can be a thin optical device by rotation of the polarization plane of linearly polarized light with the optical rotator and utilization of a property of selectively reflecting circularly polarized light of the second reflective polarizing plate. Furthermore, the optical device does not use a half mirror and thus has a property of high light utilization efficiency. When the second reflective polarizing plate has a layered structure, chromatic aberration of an optical system can be reduced.

A wireless system comprising a first communication device and at least one second communication device, said first communication device and said at least one second communication device communicating using optical signals that have the same wavelength in the uplink direction and the downlink direction, wherein the first communication device comprises at least one distribution unit that outputs, toward the at least one second communication device via an optical transmission path, an optical signal or signals outputted from at least one first photoelectric conversion unit, and outputs, to at least one second photoelectric conversion unit, an optical signal inputted via an optical transmission path, the at least one second communication device comprises a distribution unit that outputs, toward the first communication device via an optical transmission path, an optical signal outputted from a first photoelectric conversion unit, and outputs, to a second photoelectric conversion unit, an optical signal inputted via an optical transmission path, and the first communication device or the at least one second communication device comprises a polarized wave adjustment unit that adjusts the polarization plane of a converted optical signal so as to be different from the polarization plane of an optical signal transmitted by a communication partner.　

The invention relates to a system (1) for improved reference pattern recognition comprising an optical sensor (K), wherein at least two polarization filters (P1, P2) are arranged one behind the other in the direction of the image axis of the optical sensor, wherein the at least two polarization filters (P1, P2) are adjustable relative to each other, wherein at least one of the polarization filters (P1, P2) is electrically controllable for the purposes of adjustment, wherein the system further comprises a processing unit (uC) which, depending on an image captured by the optical sensor (K) and at least one further setting of the optical sensor (K), controls the at least one electrically controllable polarization filter (P1, P2) such that the polarization planes of the at least two polarization filters (P1, P2) are adjusted relative to each other when no reference pattern is recognized in the captured image.

This invention relates to the field of visual inspection technology, and particularly to a method for manufacturing a machine vision polarization plane light source with an integrated liquid crystal tuner, comprising the following steps: S1, arranging white LED chips and infrared LED chips to form an LED array, and then integrating a light-diffusing device coaxial with the LED array to obtain a light source module; S2, first preparing a liquid crystal layer and controlling its thickness using a phase delay formula to obtain a liquid crystal tuner module; S3, setting a main control chip to obtain a control and communication module; S4, preparing an optical housing, and providing a modular slot with adjustable angles within the optical housing, on which the light source module and the liquid crystal tuner module are sequentially installed; S5, fixing the control and communication module within the optical housing, and sealing the gaps in the housing and the wire perforations; S6, performing performance debugging, and obtaining the finished product after passing the test. This invention has the advantages of modular precision fabrication, optical path optimization, real-time polarization calibration, and adaptive temperature control.

A resin-coated metal sheet for containers includes a polyester resin coating layer on at least one side of a metal sheet. The polyester resin coating layer is such that the half-width of a peak assigned to C═O stretching vibration near 1730 cm−1 according to laser Raman spectroscopy is 24 cm−1 or more and 28 cm−1 or less as measured in such a manner that linearly polarized laser light with a wavelength of 532 nm is incident on the surface thereof in such a manner that the polarization plane is parallel to the rolling direction of the metal sheet; the polyester resin coating layer contains 0.010 mass % or more and 1.0 mass % or less of an organic lubricant.

An antenna mounting system includes an antenna device and a conductive base plate. The antenna device includes a ground plate, an opposing conductive plate, and a short-circuit pin. The short-circuit pin is positioned to cause a radio wave radiated from the antenna device in a direction perpendicular to the ground plate such that radio wave: has a polarization component that oscillates in a direction parallel to a main plane of polarization of a radio wave radiated from the conductive base plate in the direction perpendicular to the ground plate; and is shifted in phase from the radio wave radiated from the conductive base plate by a phase difference within a range from 90 degrees to 270 degrees.

Suppresses crosstalk from the optical transmitter to the optical receiver. [Solution] The optical device comprises a first rotor that outputs a first Y-polarized light beam by rotating the polarization plane of a first X-polarized light beam, and a second rotor that outputs a second X-polarized light beam by rotating the polarization plane of a second Y-polarized light beam. The first rotor outputs a third Y-polarized light beam that passes in the opposite direction to the first X-polarized light beam without rotating its polarization plane, and the second rotor outputs a fourth X-polarized light beam that passes in the opposite direction to the second Y-polarized light beam without rotating its polarization plane. The optical device further comprises a third PBS that deflects the third Y-polarized light beam that has passed through the first rotor, a fourth PBS that deflects the fourth X-polarized light beam that has passed through the second rotor, a first converter that converts the third Y-polarized light beam to X-polarization, and a second converter that converts the fourth X-polarized light beam to Z-polarization.

The application provides an all-fiber current sensor based on S wave plate linear measurement, which is based on Sagnac effect, Faraday magneto-optic effect and S wave plate; linearly polarized light is obtained through a polarizer, and the linearly polarized light is divided into two mutually orthogonal linearly polarized lights through a delay line and a 45-degree fusion splicing point; the linearly polarized light is modulated by a modulator, and then enters a λ / 4 wave plate and is converted into left-handed and right-handed circularly polarized light; after entering a sensing optical fiber, the measured circuit current magneto-optic effect makes the two circularly polarized lights produce a phase difference; the phase difference is doubled through a fiber end mirror and a sensing optical fiber, and the linearly polarized light is combined into linearly polarized light through a λ / 4 wave plate, a modulator and a 45-degree fusion splicing point; the phase difference of the circularly polarized light is converted into the rotation of the linearly polarized light polarization plane; the linearly polarized light after the secondary modulation passes through an S wave plate and a polarizer in turn, and the rotation of the polarization plane is converted into the synchronous translation of the light spot; the phase difference and the current value are obtained by positioning the light spot through an image sensor; the application has the advantages of optical power independence and linear birefringence complete compensation.

The invention discloses an NMOR atom magnetometer three-axis magnetic field measurement method based on dual-frequency quadrature modulation, and belongs to the technical field of three-axis magnetic field vector measurement, and the method comprises the steps: S1, tuning a laser frequency, generating a linear polarization laser through employing the frequency-tuned laser, and polarizing an atom ensemble through employing the linear polarization laser; s2, applying modulation magnetic fields with different frequencies to two orthogonal axes of the light polarization plane, performing dual-frequency orthogonal modulation, generating an optical rotation response signal, performing balance differential detection on the optical rotation response signal, and outputting a differential voltage signal; s3, synchronously demodulating the differential voltage signal to obtain a three-axis signal component; s4, performing in-situ calibration of a three-axis scale coefficient to obtain a scale coefficient; and S5, according to the scale coefficient, converting each axis signal component into a three-axis magnetic field amplitude, and outputting a three-axis magnetic field vector measurement result. The method is high in measurement precision and good in real-time performance, and can be widely applied to the technical fields of biological magnetic measurement, basic physics and the like.

A system includes a magneto-dielectric metasurface including one or more screens of the plurality of screens including at least one track, with a specific shape, juxtaposed to one face of a layer, configured to suppress at least unwanted incident right-hand circularly polarized plane waves. A system includes a metasurface polarizer including one or more screens of the plurality of screens including a plurality of layers and a plurality of tracks having a specific shape for each layer and interposed between the layers, configured to convert the incident linear / circularly polarized wave into left-hand circular polarization. A system may include a phase shift metasurface including one or more screens of the plurality of screens including at least one layer with at least one track on each side of the layer, configured to cancel the transmitted and reflected waves at the antenna point and suppress the incident wave consequently.

The application provides a linear measurement all-fiber current sensor, linearly polarized light is obtained through a polarizer, and is divided into two mutually orthogonal linearly polarized lights, and is further converted into left-handed and right-handed circularly polarized light to input a sensing optical fiber, a Faraday magneto-optic effect of current is used to make the two circularly polarized lights have a phase difference, the circularly polarized light is reflected by a mirror at the end of the sensing optical fiber, and then the phase difference is doubled through the sensing optical fiber, and the circularly polarized light is combined into a linearly polarized light through a λ / 4 wave plate, a modulator secondary phase modulation and a 45° fusion splice point, meanwhile, the phase difference of the circularly polarized light is converted into the rotation of the linearly polarized light polarization plane, and the rotation of the linearly polarized light polarization plane is converted into the synchronous translation of a light spot through a coupler, a beam expander and a radial polarization grating, and the phase difference is obtained by positioning the light spot through an image sensor; the application realizes linear demodulation of a Faraday magneto-optic rotation angle, has the advantages of being irrelevant to the measurement result and optical power, being beneficial to the separation compensation of linear birefringence, realizing non-distortion harmonic measurement and the like.

An optical fiber current sensing controller module, where an optical transmitter is energized from a DC source and emits an optical field of calibrated intensity and wavelength to a linear polarizer which generates a reference signal which is then launched in alignment with the transmission axes of a polarization maintaining optical fiber link to a remote and passive fiber optic current sensor (FOCS), where the linearly polarized optical pulse traverses a complete circular path around an energized conductor and is subject to polarization plane rotation in proportion to the magnetic flux density with the integration equal to electric current magnitude according to Ampere's law, and the rotated polarized optical pulse is transmitted back to the optical fiber current sensing controller module via a return fiber optic cable, where the Stokes vector polarization parameters for the returned optical signal are calculated by splitting the elliptically polarized field into four components, passing these components through an analyzer comprised of a linear horizontal polarizer, a linear vertical polarizer, a linear polarizer with transmission axis set at 45 degrees, and a linear polarizer with transmission axis set at 135 degrees, respectively, and where the four separate outputs of the four fiber optic polarizing filters are connected respectively to four separate photodiodes which transduce each optical intensity to analog voltage outputs which are sampled by a digital signal processing chipset, where the Stokes vector parameters for the polarized optical signal are calculated directly from the digitally sampled array of optical intensity values transduced by the photodiodes, and the change in polarization state from which electrical current is measured is derived by comparing the initial linear polarization Stokes vector of the generated reference signal with the measured Stokes parameters of the elliptically polarized optical signal received from the analyzer, and where a sample of the generated polarized reference signal is measured at a photodiode to monitor online sensor network optical attenuation and reference signal power fluctuations.

A wireless communication system (101) includes: a housing (10) formed of a conductive material; a plurality of battery packs (20) each having a surface made of a conductive material; and a plurality of wireless communication devices (40, 30) that have antennas (46, 36) that are disposed in propagation paths (S1, S2) formed between the case and the plurality of battery packs, and that wirelessly communicate with each other by radio waves having a predetermined communication frequency. The plurality of wireless communication devices mainly include antennas that transmit and receive radio waves of a polarization plane in a predetermined direction corresponding to each of the plurality of wireless communication devices more strongly than radio waves of a polarization plane in an arbitrary direction different from the predetermined direction. The polarization plane in the prescribed direction is a polarization plane in which cut-off frequencies prescribed on the basis of the length in the longitudinal direction of the cross-section of the propagation path of the antenna in which each of the plurality of wireless communication devices is disposed are lower than the prescribed communication frequency.

The application discloses a Ka-band circularly polarized planar reflective array unit and an antenna, and the array unit comprises an upper dielectric substrate, a lower dielectric substrate and a metal ground plate; the upper dielectric substrate is provided with a rectangular radiation patch at a central position; the rectangular radiation patch is provided with a slot at the center; the two sides of the rectangular radiation patch are symmetrically provided with trapezoidal radiation patches and strip-shaped rectangular radiation patches; the trapezoidal radiation patches are located inside the strip-shaped rectangular radiation patches; the lower dielectric substrate is symmetrically provided with trapezoidal radiation patches and strip-shaped rectangular radiation patches on the two sides; the trapezoidal radiation patches are located inside the strip-shaped rectangular radiation patches; the directions of the radiation patches on the two sides of the lower dielectric substrate are orthogonal to the directions of the radiation patches on the two sides of the upper dielectric substrate; and the metal ground plate is tightly attached to the lower dielectric substrate; the antenna comprises N*N Ka-band circularly polarized planar reflective array units and a linearly polarized feed source with good performance. The application solves the problems of low aperture efficiency of the planar reflective array and the problems of the circularly polarized planar reflective array in dealing with electromagnetic interference and multipath effects.

The present invention achieves highly efficient optical coupling even when a grating coupler having polarization dependency is used.　This optical processing device is provided with an optical processing unit. In the optical processing unit, incident light is separated into a first linearly polarized wave and a second linearly polarized wave. The polarization plane of the first linearly polarized wave and the polarization plane of the second linearly polarized wave are orthogonal to each other. The first linearly polarized wave has a first polarization plane. The optical processing unit outputs a first final emission light corresponding to the first linearly polarized wave and a second final emission light corresponding to the second linearly polarized wave. The polarization plane of the first final emission light is different from the first polarization plane.

Techniques are provided for fabricating an expandable tightly coupled dipole array (TCDA) antenna with dual-linear linear polarization. An antenna implementing the techniques according to an embodiment includes an array of the electrically coupled antenna elements. The antenna elements comprise a horizontally polarized planar dipole antenna disposed on a first foldable substrate and a ground plane disposed on a second foldable substrate. The second substrate is parallel to the first substrate. The antenna elements also comprise a first printed circuit board (PCB) coupling the first substrate to the second substrate, the first PCB perpendicular to the first substrate and the second substrate, and a second PCB coupling the first substrate to the second substrate, the second PCB perpendicular to the first substrate and the second substrate and parallel to the first PCB. The antenna elements further comprise a vertically polarized dipole antenna disposed on the second PCB.

The application provides a kind of double optical path atomic magnetometer based on polarization super surface and measuring method, comprising: laser unit, collimator, polarization super surface, magnetic probe unit, first mirror and signal processing unit;Laser passes collimator and polarization super surface in turn, circularly polarized pump light is converted and emitted by polarization super surface with fixed tilt angle, due to the interaction of the detection light and polarized atom, the polarization plane of detection light is rotated, and the signal processing unit detects after transmitting out of the atomic cell;Through the characteristics of super thin, planarization and function integration of polarization super surface structure, the regulation of electromagnetic wave is realized through subwavelength structure, the structure of double optical path small magnetometer is realized by single laser source, so that the overall structure meets the design requirements of small volume, high integration, easy operation, high sensitivity, small size adaptation, and is suitable for promotion.

The present application provides an optical waveguide element, an optical modulating device and an optical transmitting apparatus using the optical waveguide element, which suppresses polarization rotation. The optical waveguide element has a substrate (10) and an optical waveguide (2) disposed on the substrate, characterized in that the optical waveguide has an effective refractive index varying portion, which is a portion in which the effective refractive index of the optical waveguide under a fundamental mode A parallel to the polarization plane of an optical wave propagating in the optical waveguide varies with the propagation of the optical wave, and in which the cross-sectional shape of the optical waveguide perpendicular to the propagation direction of the optical wave is a cross-sectional shape in which the effective refractive index of the optical waveguide under the fundamental mode A is higher than the effective refractive index of the optical waveguide under another fundamental mode B perpendicular to the fundamental mode A.

A three-dimensional (3D) topological insulator (Tl), configured with a surface channel for conducting spin polarized electron flow, and piezoelectric element that strains the 3D Tl, responsive to an input voltage, producing stress in the surface channel according to a voltage-to-stress characteristic (VTSC). A spin polarizer and spin analyzer act as source and drain and produce an electric field through the surface channel when a voltage is applied between the source and drain, the spin polarizer injects spin polarized electrons to flow through the surface channel and arrive at the spin analyzer as arrival electrons. The surface channel has a stress-to-rotation characteristic (STRC) that, responsive to the stress, rotates the spin polarization such that the arrival electrons have a rotated plane of polarization, at a rotation angle.

According to one embodiment, a storage battery apparatus including a wireless module transmitting and receiving a radio wave having a polarization plane in any one of first to third directions orthogonal to one another; and a battery management unit including a first wireless module transmitting and receiving a radio wave having the polarization plane in the first direction, and a second wireless module transmitting and receiving a radio wave having the polarization plane in the second direction, wherein the polarization plane in the first direction is less likely to have reception power of lowest receiving sensitivity than the polarization planes in other directions, and a number of the first wireless modules is larger than a number of the second wireless modules.

The invention discloses an optical modulation link control method, device and system, and the method comprises the steps: transmitting two paths of optical carrier signals to a polarized light coupling and delay module in the forward direction through corresponding optical circulators, carrying out the coupling and delay control of the two paths of signals, and outputting two paths of modulated light with the polarization planes kept orthogonal; the modulated light enters the Faraday optical rotation reflection module, and is reflected to form two paths of reflected light signals which are reversely transmitted, the two paths of reflected light signals are transmitted back to the polarized light coupling and delay module for secondary delay and partial wave control, and two paths of independent reflected light signals are output; the two paths of independent reflected light signals are reversely incident to a photoelectric detector through corresponding optical circulators respectively, and the photoelectric detector performs photoelectric conversion and signal amplification on the two paths of reflected light signals respectively and outputs two paths of delay microwave frequency discrimination signals for radio-over-fiber phase noise measurement. According to the invention, time synchronization of two paths of delay microwave frequency discrimination signals for phase noise measurement is realized, and the signals are independent and low in crosstalk.

The application provides an all-fiber current sensor based on linear measurement of sharp wedge interference, linearly polarized light obtained through a polarizer is divided into two mutually orthogonal linearly polarized lights through a coupler, a delay line and a 45-degree fusion splice point, is modulated by an initial phase modulator, is converted into left-handed and right-handed circularly polarized light through a first lambda / 4 wave plate, enters a sensing optical fiber, and a phase difference of the two circularly polarized lights is generated through a Faraday magneto-optic effect; the phase difference is doubled after being reflected by a mirror, is combined into a linearly polarized light through a first lambda / 4 wave plate and a 45-degree fusion splice point, and the phase difference of the circularly polarized light is converted into a rotation of a polarization plane of the linearly polarized light; the rotation of the polarization plane of the linearly polarized light is converted into synchronous translation of a light spot through a coupler, a second lambda / 4 wave plate, a sharp wedge and a polarizer after being twice phase-modulated by a modulator; and linear measurement of a phase delay angle is obtained through positioning of the light spot by an image sensor; the demodulation result of the application is irrelevant to optical power, and is beneficial to separation and compensation of linear birefringence.

This application provides a dual-band dual-polarized planar base station antenna, comprising a dielectric substrate and a metal layer. A differential feed network is provided on one side surface of the dielectric substrate. The differential feed network includes four differential input feed line branches, which are arranged in pairs and are centrally symmetrical with respect to the center of the dielectric substrate. Each differential input feed line branch has a first output feed line on one side and a second output feed line on the other side. The metal layer is disposed on the side of the dielectric substrate opposite to the differential feed network and has multiple first and second radiation slots with opposite opening directions arranged in pairs. The dielectric substrate has metallized vias penetrating both sides. Each first output feed line is connected to a second radiation slot through the metallized via. Each second output feed line is connected to a first radiation slot through the metallized via. The dual-band dual-polarized planar base station antenna provided by this application has a low profile and simple structure, making it more suitable for miniaturization requirements.

A thin film characteristic diagnosis device according to an embodiment includes: a memory storing at least one instruction; and at least one processor executing the at least one instruction, wherein the at least one processor is configured to: make laser (light amplification by simulated emission of radiation; LASER) light, which supplies energy to a thin film, be incident onto the thin film; determine an ordinary refractive index (no) of the thin film based on a first spectrum obtained by polarizing emission light that has passed through a Fourier lens after being emitted from the thin film according to a first polarization plane; and determine a transition dipole moment (TDM) orientation angle (θhor) and an extraordinary refractive index (ne) of the thin film based on the first spectrum and a second spectrum obtained by polarizing the emission light according to a second polarization plane perpendicular to the first polarization plane.