73 results about "Polarization plane" patented technology

Disclosed is a radiator assembly configured to operate in the range of 3.4-4.2 GHz. The radiator assembly comprises a folded dipole with four dipole arms that radiate in two orthogonal polarization planes, whereby the signal of each polarization orientation is radiated by two opposite radiator arms that radiate the signal 180 degrees out of phase from each other. The radiator assembly has a balun structure that includes a balun trace that conductively couples to a ground element on the same side of the balun stem plate. The combination of the shape of the folded dipole and the balun structure reduces cross polarization between the two polarization states and maintains strong phase control between the opposing radiator arms.

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 invention provides a broadband circularly polarized planar end-on-fire antenna based on a substrate integrated waveguide. The broadband circularly polarized planar end-on-fire antenna comprises a wave port, the substrate integrated waveguide and a dipole antenna, the wave port is connected with one side, far away from the dipole antenna, of the dielectric substrate and is used for generating an excitation signal through feed and driving electromagnetic wave transmission in the substrate integrated waveguide, so that the substrate integrated waveguide generates a vertical polarization electric field component and the dipole antenna generates a horizontal polarization electric field component; by adjusting the amplitude-phase relation between the two orthogonal polarization electric field components, broadband circular polarization radiation is realized. The broadband circularly polarized plane end-on-fire antenna does not need an additional radiation structure to compensate the vertical polarization component, avoids the increase of the profile height due to the addition of the additional structure, achieves the low profile design, and enables the structure to be more compact. The dipole antenna is directly connected with the upper metal plate and the lower metal plate, so that the overall size of the antenna is greatly reduced, the occupied space is reduced, the manufacturing process is simplified, and the production process and the material cost are reduced.

The present invention proposes a method for solving the transmission characteristics of a cellular frequency selective surface. The implementation steps include: constructing a unit geometric model of the cellular frequency selective surface; performing mesh division on the unit geometric model; calculating the direction vector of the polarized plane wave in OXYZ; calculating the incident field at the excitation port in different modes; constructing a finite element matrix equation; performing matrix element substitution on the matrix equation; and obtaining the transmission characteristics of the cellular frequency selective surface. By using two vector edges of the excitation port and transforming the three-dimensional coordinate system into a three-dimensional local coordinate system, and calculating the wave numbers of the polarized plane wave in the three axial directions of the three-dimensional local coordinate system, the present invention calculates the incident field at the excitation port in different modes, avoiding the defect in the prior art that the incident field at the excitation port cannot be calculated in a coordinate system with two vector edges of a regular hexagon as the coordinate axes by using the finite element method, and achieving high-precision solution of the transmission characteristics of the cellular frequency selective surface.

The present invention provides a high-resolution coaxial velocity imaging device, which relates to the field of energy spectrum analysis equipment. The high-resolution coaxial velocity imaging device provided by the present invention includes an analysis chamber, a gas injection mechanism, a vacuum mechanism, an electrostatic lens and an image acquisition mechanism; one end of the analysis chamber is provided with a light inlet window suitable for allowing laser light to pass through, and the image acquisition mechanism passes through one end of the analysis chamber and is connected to the inner cavity of the analysis chamber; the gas injection mechanism and the vacuum mechanism are both provided on the side wall of the analysis chamber and are both connected to the inner cavity of the analysis chamber, and the electrostatic lens is provided in the inner cavity of the analysis chamber. The optical path of the laser, the electrostatic lens and the image acquisition mechanism in the present invention are located on the same axis, which is usually the central axis of the analysis chamber, and a reflector is also provided in the electrode sheet to reflect the laser light, so that the momentum distribution image of electrons or ions on the polarization plane can be directly obtained.

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.

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 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.

Resin-coated metal sheets for containers are provided that are capable of undergoing can manufacturing with no breakage of a resin coating layer and with no or minor abrasion of a resin coating layer stemming from insufficient slidability during can manufacturing, and also excel in adhesion with a printing paint applied after the can manufacturing. A resin-coated metal sheet 1 for containers includes a polyester resin coating layer 3 on at least one side of a metal sheet 2. The polyester resin coating layer 3 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; and the surface of the polyester resin coating layer, after being heat-treated in such a manner that the temperature is increased from room temperature to 240°C in 2 minutes, has a contact angle with diiodomethane of 23° or more and 40° or less.

Provided is a resin-coated metal plate for containers, which is capable of suppressing breakage of a resin coating layer due to can-making processing and scratching of the resin coating layer due to insufficient sliding properties during the can-making processing, and which has excellent adhesion to a printing coating material after the can-making processing. A resin-coated metal plate (1) for containers, which is provided with a polyester resin coating layer (3) on at least one surface of a metal plate (2), said polyester resin coating layer (3) having a half-value width of a peak caused by C = O stretching vibration near 1730 cm-1 as determined by laser Raman spectroscopy of 24 cm-1 to 28 cm-1, and a half-value width of a peak caused by C = O stretching vibration near 1730 cm-1 as determined by laser Raman spectroscopy. The present invention is characterized by containing 0.010-1.0 mass% of an organic lubricant when measured by causing the polarization plane of a linearly polarized laser beam having a wavelength of 532 nm to be incident on the surface of the polyester resin coating layer (3) in parallel with the rolling direction of the metal plate. The contact angle of diiodomethane on the surface of the polyester resin coating layer after heat treatment from room temperature to 240 DEG C within 2 minutes is 23-40 DEG C.

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.

To provide a wireless repeater that uses the same antenna design and antenna components and is capable of responding to two or more types of orthogonal polarization, such as vertical / horizontal polarization sharing and ±45° polarization sharing.SOLUTION: A wireless repeater includes: a first antenna and a second antenna which respond to two polarizations with two different polarization surfaces; and a substrate part. The wireless repeater further includes a polarization rotation mechanism for rotating the first antenna and the second antenna by at least 45 degrees.SELECTED DRAWING: Figure 1

The invention discloses a dual-polarization microwave energy efficient receiving composite metasurface array and a receiving method, and the method comprises the steps: enabling different polarization plane waves to irradiate a polarization selective waveform conversion function region composed of biaxial symmetric split-ring resonators, and carrying out the unit differential response and reflection phase gradient arrangement, converting the x-polarized plane wave and the y-polarized plane wave into surface waves propagating in the-x direction and the y direction respectively; the square ring-shaped artificial surface plasmon polariton structure is used for receiving the surface wave, and the surface wave is stably guided to the waveform focusing and energy extraction functional area through momentum matching; by means of gradient refractive index distribution focusing surface waves of a planar semi-Maxwell fisheye lens, an equiphase surface is bent into a spherical surface shape, and energy is converged to a focus; energy is led out through the microstrip line structure at the focus, efficient transmission is achieved through impedance matching, and collection and conversion of different polarization microwave energy are completed. The polarization sensitivity problem of a traditional scheme is solved, and the microwave energy collection efficiency is improved.

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 relates to an optical voltage transformer quarter-wave plate additional birefringence calculation method based on a linear demodulation mode, and belongs to the technical field of high voltage measurement and optical voltage transformers. Linear demodulation of phase delay is realized based on an S-wave plate, specifically, light emitted by a light source forms linearly polarized light through a polarizer, electro-optical phase delay is generated through an electro-optical crystal modulated by an electric field, the linearly polarized light is synthesized under the action of a quarter-wave plate, and additional birefringence generated by the quarter-wave plate due to temperature drift is considered. Electro-optic phase delay and additional birefringence (collectively referred to as phase delay variation) are both converted into rotation of a linearly polarized light polarization plane, after the linearly polarized light passes through the S wave plate and the polarization analyzer, the rotation angle of the polarization plane is converted into linear translation of a strip-shaped light spot, and the rotation angle and the linear translation meet a linear relation. Therefore, the displacement of the light spot is determined by positioning the light spot, and the rotation angle of the polarization plane can be measured. And the additional birefringence introduced by the quarter-wave plate can be calculated by modulating the alternating-current voltage to be measured.

To provide a magnetic field sensor head capable of suppressing a decrease in measurement accuracy due to a magnetic field applied from a magnetic body arranged in the vicinity of a Faraday rotator.SOLUTION: A magnetic field sensor head 50a includes: an optical element 52 having a first surface and a second surface, which diverges incident light incident on the first surface and emits it from the second surface, and which focuses return light incident on the second surface and emits it from the first surface; a Faraday rotator 54 that is disposed so that the incident light emitted from the second surface is incident thereon and the return light is emitted to the second surface, and that rotates polarization planes of the incident light and the return light by a rotation angle according to an applied magnetic field when the incident light and the return light pass through; a mirror element 55 that emits the return light to the Faraday rotator in response to an incidence of the incident light from the Faraday rotator; a magnetic body 57 that applies a magnetic field to the Faraday rotator; and a compensation element 53 that is arranged so that the incident light is emitted to the Faraday rotator and the return light is incident from the Faraday rotator, and that compensates for the rotation angle.SELECTED DRAWING: Figure 2

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.

An image projection device is provided that can effectively mitigate a temperature rise of an image radiation unit due to external light while maintaining the quality of a projected image. The image projection device includes an image radiation unit that radiates an image, a reflection-transmission unit that reflects radiation light from the image radiation unit at a front surface and transmits light from a back surface, and an angle-dependent light transmission unit of which transmittance of light in a predetermined polarization plane changes depending on an incidence angle. The angle-dependent light transmission unit is disposed in an optical path of the radiation light from the image radiation unit to the reflection-transmission unit.

A wireless communication system (101) is provided with: a housing (10) formed of a conductive material; a plurality of battery packs (20) each having a surface formed of a conductive material; and a plurality of wireless communication devices (40, 30) having antennas (46, 36), the antennas being disposed in propagation paths (S1, S2) formed between the housing and the plurality of battery packs, and the plurality of wireless communication devices performing wireless communication with each other by using radio waves having a predetermined communication frequency. Each of the plurality of wireless communication devices is mainly provided with an antenna that transmits and receives a radio wave based on a polarization plane in a predetermined direction corresponding to that wireless communication device more strongly than a radio wave based on a polarization plane in any direction different from the predetermined direction. With the polarization planes in the predetermined directions, the cutoff frequencies individually defined on the basis of the lengths in the longitudinal directions of cross sections of the propagation paths in which the antennas of the plurality of wireless communication devices are individually disposed are all lower than the predetermined communication frequency.

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.

This wavelength conversion device (500) is provided with: a wavelength conversion element (512) provided with a waveguide array (511); a first optical system (533) for causing the signal light and the excitation light to enter a waveguide (511a) in the waveguide array (511) and causing the monitoring light to enter a waveguide (511b) adjacent to the waveguide (511a); a second optical system (534) for demultiplexing the emitted light from the waveguides (511a, 511b) into signal light, excitation light, and monitoring light; a polarizer (525) having a transmission axis orthogonal to the input polarization plane angle of the monitoring light; a wave detector (526) for receiving the monitoring light; and a measurement unit (532) for measuring the power of the monitoring light on the basis of the output of the wave detector (526).

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 present invention proposes a sensor noise compensation method that combines convergent polarization interference and synchronous sampling of a unit. The light from a light source passes through a polarizer to form linearly polarized light. Under the action of a magnetic field to be measured, the linearly polarized light passes through a magneto-optical thin film, and its polarization plane rotates by α. Then, it enters a uniaxial crystal through a converging lens, where birefringence occurs and it is decomposed into an o-ray and an e-ray with vibration directions perpendicular to each other and a fixed phase difference, forming a convergent polarization interference image. When there is no temperature drift or vibration, in the convergent polarization interference image corresponding to the zero-crossing of the alternating current to be measured, the Faraday magneto-optical rotation angle α The center position of the bright fringe of the corresponding interference spot is at y axis; in the case of temperature drift or vibration, the rotation angle of the interference spot of the convergent polarization interference image corresponding to the zero-crossing of the alternating current to be measured relative to the y axis is the corresponding temperature drift noise γ , which is detected by positioning the spot characteristics γ and compensated to achieve the purpose of eliminating γ ; the present invention can extract and compensate the interference amount formed by stress-induced birefringence.

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.