12 results about "Elliptical polarization" patented technology

The present invention provides a distance calculation device that can calculate distance information relating to the distance a workpiece travels. [Solution] The system comprises a light source 10 that emits light, a first optical system 20 that converts the light from the light source into elliptical polarization and emits it toward a workpiece W1 that is transparent and moving in a specific direction, a second optical system 30 that converts the light from the workpiece into linear polarization and emits it, and an optical sensor 40 that acquires optical information of the workpiece based on the light from the second optical system. The first optical system includes a first polarizing filter 22 that converts to linear polarization and a first waveplate 23 that converts the linear polarization from the first polarizing filter into elliptical polarization. The second optical system 30 includes a second waveplate 31 that converts the light from the workpiece and a second polarizing filter 32 that is placed between the second waveplate and the optical sensor 40 and converts the light from the second waveplate into linear polarization.

To provide an optical laminate including a liquid crystal alignment cured layer and suppressing peeling defects when peeling the alignment substrate. 【Solution means】The optical laminate according to an embodiment of the present invention has a polarizing plate including a polarizer, a retardation layer laminated on the polarizing plate via a first adhesive layer, and a substrate laminated on the retardation layer in a peelable manner; the retardation layer includes, in order from the polarizing plate side, a first liquid crystal alignment cured layer and a second liquid crystal alignment cured layer laminated on the first liquid crystal alignment cured layer via a second adhesive layer; the retardation layer as a whole has a circular polarization function or an elliptical polarization function, has a relationship of Re(450)<Re(550)<Re(650), and its Nz coefficient is 0.30 to 0.70; the substrate is an alignment substrate of the second liquid crystal alignment cured layer, and its tensile elastic modulus is 3000 N / mm 2 or more.

Embodiments of the present application relate to a three-dimensional spatial light source system and a corresponding light measurement device, wherein the three-dimensional spatial light source system comprises: a light source; and a plurality of light paths independent of each other and configured to be coupled to the light source independently; wherein the plurality of light paths further comprises an intermediate light path and a plurality of peripheral light paths arranged around the intermediate light path and capable of being output as secondary light sources. Thus, the three-dimensional spatial light source system of the present application only needs one light source to meet the multi-path light source requirement of an elliptical polarization measurement device, and has simple structure, convenient installation and maintenance.

A single-light-path atom magnetometer based on any polarization state light splitting metasurface cascade is characterized in that coherent light emitted by a laser passes through a first-stage metasurface to realize light beam splitting in an orthogonal elliptical polarization state, one beam of light in the beam splitting light enters a glass gas chamber for pumping and detection, and the other beam of light enters a photoelectric detector for pumping and detection; the second-stage metasurface is used for monitoring the output light power of the laser device and controlling stable output of the laser device through a control circuit, light emitted out of the glass gas chamber passes through the second-stage metasurface, beam splitting of orthogonal linear polarization components is achieved, the light enters the two photoelectric detectors respectively, and precise measurement of an external magnetic field is achieved through signal processing of a rear-end circuit. The atomic magnetometer has the advantages that complete precise control over pumping and detection in the atomic magnetometer is achieved through cascading of the light splitting metasurfaces which can be integrated and are in any polarization state, meanwhile, system configuration is simplified, and performance improvement and miniaturization are facilitated.

The invention discloses a communication electromagnetic wave adjustable linear polarization-to-circular polarization spherical lens antenna, a manufacturing method thereof, a communication base station, a communication system and a communication method, and belongs to the technical field of electronic communication antennas. The antenna comprises a controllable polarization spherical lens and a linear polarization feed source. The feed source is used for emitting polarized electromagnetic waves of which the linear polarization direction and the main axis direction form an inclined angle to the sphere; the length of an axial baseband of the electromagnetic baseband unit is configured to be greater than that of a radial baseband, so that the electromagnetic wave refractive index in the main axis direction is greater than that in the radial direction; and when the feed source is located at the equator part of the moving track, the electromagnetic waves are emitted in a circular polarization manner after being regulated and controlled by the lens. When the feed source is located at the end part of the sphere of the moving track, the polarization direction of electromagnetic waves is not changed after passing through the lens; and when the feed source is located between the equator part and the end part of the sphere, the electromagnetic waves are emitted in an elliptical polarization manner after being regulated and controlled by the lens. And three functions of high-gain wide-angle scanning, broadband working and adjustable polarization state are realized.

The invention relates to the technical field of chip testing, in particular to an electrical property testing method, system and device based on a chip. According to the method, an auxiliary excitation coil is deployed around a to-be-detected chip silicon through hole array to generate a compensation magnetic field, the compensation magnetic field and an eddy current magnetic field are superposed to form an elliptically polarized magnetic field, a magnetic field sensor captures a long axis direction to extract real phase information of an original current magnetic field, and phase offset is dynamically compensated based on the phase information. And outputting the reconstructed current waveform, and finally identifying the chip defect according to the reconstructed current waveform. According to the method, the compensation magnetic field is generated by deploying the auxiliary excitation coil, the magnetic field sensor, the dynamic eddy current transfer function model and the like are combined, the current waveform is reconstructed to identify the defects, and high-precision detection and positioning of the defects such as chip micro short circuit are achieved.

The application discloses a spin terahertz emitter with adjustable polarization without an external magnetic field and a manufacturing method thereof. A metal thin film layer heterostructure is deposited on a surface of a glass substrate. A ferromagnetic layer is a FeNi thin film layer, an anti-ferromagnetic layer is an IrMn3 thin film layer, and an interface between the FeNi thin film layer and the IrMn3 thin film layer is an exchange coupling interface subjected to directional magnetic field induction treatment. A surface of the metal thin film layer heterostructure is a periodic stripe array structure. The manufacturing method comprises the following steps: a magnetron sputtering process is used to sequentially deposit a ferromagnetic layer, an anti-ferromagnetic layer and a protective layer; the exchange coupling interface is formed through directional magnetic field induction treatment; and a micro-nano processing process is used for patterning treatment. Beneficial effects are as follows: under the condition of no external magnetic field, reliable spin current generation, spin-charge conversion and terahertz radiation can be realized. The stripe patterning structure realizes linear polarization, elliptical polarization and near-circular polarization output. The 'zero-field emission function' and the 'polarization control function' are integrated in the same thin film device system, and the system complexity is reduced.

The invention discloses a bottom-supported ocean controllable source electromagnetic data batch processing method, which comprises the following steps: carrying out integrity check and time / frequency sequence preview on recorder data, emission source data and navigation data to obtain key data information; converting the time domain observation data into a frequency domain; performing normalization and correction on the observation data; rotating the electromagnetic field vector to the main axis direction of the elliptical polarization field; performing time window superposition processing on the corrected and rotated data, and synchronously estimating a data error; filtering the navigation data; projecting the filtered navigation data to a preset 2D profile orientation through coordinate rotation; time sequences of the navigation data and the electromagnetic acquisition data are aligned through interpolation, the transceiving distance of each time point is calculated, and an amplitude-transceiving distance curve and a phase-transceiving distance curve for inversion are generated. According to the method, the normalized electromagnetic field spectrum response which can be used for underground resistivity inversion can be efficiently and accurately extracted from the original time sequence data.

Presented herein are methods and systems for performing spectral elliptical polarization measurements of semiconductor structures with a collection NA resolved at a detector. The collection NA defines a small measurement cartridge size. The NA is distinguished and collected at the detector, so that the measurement sensitivity is remarkably improved. In some examples, the collection NA is subdivided into 50 to 100 sub-ranges at the detector. In some embodiments, a spectral ellipsometer employing angle resolved detection of collected NAs includes a coherent illumination source having a high spectral intensity across a wavelength range from 400 nanometers to 2,500 nanometers. In some embodiments, an illumination beam is scanned over a surface of a sample being measured at a high frequency during measurement. Spectral elliptical polarization measurements with detector-resolved collected NAs enable critical dimension, shape and profile measurements as well as film measurements of deep structures fabricated according to current semiconductor fabrication nodes, as well as those considered to be fabricated at future semiconductor fabrication nodes.

The invention discloses an ocean controllable source electromagnetic acquisition station position correction method based on near-field symmetry. The method comprises the following steps: acquiring an initial position coordinate of a target receiving station, ocean controllable source electromagnetic actual measurement time sequence data, and real-time space coordinate and azimuth angle data of an emission source; preprocessing the time sequence data, and calculating the maximum amplitude of the elliptical polarization field in the main axis direction; screening out near-field data of which the transmitting-receiving distance between an emission source and a receiving station is smaller than a set threshold value from all data; searching a data pair in which the emission sources pass through the opposite directions of the two sides of the receiving station, the distances from the receiving station are approximate, and the absolute value of the azimuth angle difference between the two emission source positions is smaller than a set angle threshold; establishing an optimization objective function according to the data pair; and performing minimization solution on the target function by adopting a nonlinear least square algorithm to obtain an optimal position. The physical principle that an electromagnetic field in a near-field region should be strictly symmetrical about the position of the receiving station is utilized, and the real horizontal position of the receiving station is automatically optimized through an optimization algorithm.

The application provides an antenna system and a control method and device thereof, an electronic device and a readable storage medium, wherein the antenna system comprises: an antenna assembly, the antenna assembly comprising a first antenna arm, a second antenna arm and a third antenna arm, the first antenna arm and the second antenna arm being perpendicular, the first antenna arm and the third antenna arm being perpendicular, and the second antenna arm and the third antenna arm being perpendicular; and a phase shift assembly, the phase shift assembly comprising at least two phase shifters, at least two of the first antenna arm, the second antenna arm and the third antenna arm being connected to different phase shifters respectively, so that the first antenna arm and the second antenna arm form circularly polarized radiation or elliptically polarized radiation when working, the first antenna arm and the third antenna arm form circularly polarized radiation or elliptically polarized radiation when working, and the second antenna arm and the third antenna arm form circularly polarized radiation or elliptically polarized radiation when working.

The present application relates to the technical field of fiber laser, particularly relates to a kind of full optical fiber integrated polarization adjustable control narrow line width laser, the device includes semiconductor pump source, active pi phase shift fiber grating, polarization maintaining isolator, polarization maintaining polarization beam splitter, power equalization unit, phase modulator and polarization maintaining polarization combiner.The present application utilizes the single longitudinal mode orthogonal dual polarization light field generated by active resonant cavity as base, and separates it into two paths;Through power equalization unit, the light energy of two paths is consistent, and the phase difference of two light is regulated using phase modulator, and finally coherent superposition output is output.The present application realizes stable continuous regulation between laser on-line polarization, circular polarization and elliptical polarization state, adopts full optical fiber structure, is strong against interference, and is suitable for communication and sensing field.