6 results about "Polarization plane" patented technology

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 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.

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.

The invention provides an ophthalmic device having adjustable filtering properties, comprising at least one first polarizer (18), at least one second polarizer (19) which is fixed relative to said first polarizer, and at least one adjustable filtering member (20) located between said first and second polarizers and configured to rotate a polarization plane of light received from said first polarizer and propagating towards said second polarizer; wherein said adjustable filtering member is configured to admit a plurality of active states, in each of which it rotates the polarization plane according to a respective and predetermined angle.

The invention relates to an optical device (100) for a polarization lidar system (200), a method therefor, a polarization lidar system (200), a computer program product for such a system, and a signal processing unit (70) for an optical device (100) of a polarization lidar system (200). The device comprises an optical transmitter unit (10) with a laser source (12) for emitting a pulsed, polarized light beam (14) for raster scanning of an environment (110), an optical receiver unit (30) with photodetectors (32, 34) for receiving a light beam (36) backscattered from the environment (110), wherein the optical receiver unit (40) is configured to determine the intensity of the backscattered light beam (36) in at least two polarization planes, and a signal processing unit (70) for processing signals from the photodetectors (32, 34).wherein the signal processing unit (70) is configured both to generate spatial information of the environment (110) from a temporal correlation of the pulsed light beam (14) and the backscattered light beam (36) and to determine a polarization of the backscattered light beam (36) at least for the localization and / or classification of one or more aerosols.