2405 results about "Reflective surfaces" patented technology

A reflective device includes a control element, and a reflective surface with a plurality of reflective elements. Each reflective element of the plurality of reflective elements includes an antenna element and a phase shifting arrangement and is under control of the control element so as to reflect a radio-frequency (RF) signal incident on the reflective surface with an adjustable phase shift. The plurality of reflective elements are connected to the control element via a cell selection bus system that interconnects the plurality of reflective elements.

The invention discloses a metal surface quality detection method and system, and relates to the technical field of metal surface quality detection. The method is used for solving the problems of low microdefect detection precision, weak technological parameter relevance and closed-loop control deficiency of the high-reflection surface. The metal surface is irradiated through multi-angle coherent light field serialization, the phase offset of interference fringes is analyzed to generate three-dimensional shape data, and reflection noise interference is restrained. Defect depth gradient is extracted based on dynamic segmentation of process parameter constraint, deposition temperature and pressure deviation are quantified through deconvolution calculation, and process deviation feature distribution is constructed. Finite element simulation is utilized to generate a process-morphology mapping atlas library, cross-domain invariance features are extracted through depth constraint manifold alignment and comparative learning, and a causal correlation model of defect types and process parameters is established. And dynamically adjusting process parameters according to the weight gradient, and reflowing data to update the manifold rule. And high-precision three-dimensional defect detection, process deviation traceability and adaptive parameter optimization are realized.

A reflective device includes a control element and a reflective surface. The reflective surface includes a plurality of reflective elements, where each reflective element of the plurality of reflective elements has an antenna element and a phase shifter and is under control of the control element so as to reflect a radio-frequency (RF) signal incident on the reflective surface with an adjustable phase shift. An operating frequency of the reflective surface is configurable by at least a subset of the plurality of reflective elements being divided into a number of sub-elements that are individually switched via the control element from an activated state, in which a respective sub-element contributes to the reflection of the incident RF signal, to a deactivated state, in which the respective sub-element does not contribute to the reflection of the incident RF signal, and vice-versa.

An embodiment of an improved fishing lure comprises a fishing lure body having an approximately flat surface on the top side or bottom side of the body and a blade statically affixed to the approximately flat surface. The lure body may include a recess having a wall and a base, wherein the approximately flat surface is at the base of the recess, and wherein around a portion of the perimeter of the recess at least one lip extends inward from the wall of the recess. The blade is preferably disposed in the recess and below the at least one lip. In some embodiments, the approximately flat surface has a float angle between about 30 degrees and about 90 degrees relative to horizontal, and more preferably between about 35 degrees and about 45 degrees relative to horizontal.

A system having a fixture with a unit under test (UUT) to be measured and at least one alignment target providing a reflective surface with curvature, and at least one alignment hologram oriented at a position of a measurement computer generated hologram (CGH). The alignment hologram being characterized by forming a wavefront that matches one of a point focus normal at a point upon, or a line focus along a segment along, the curvature of the reflective surface of the alignment target, when the UUT is at a target position aligned for interferometric measurement using the CGH. An interferometer or wavefront sensor detects when the wavefront from each of the one or more alignment holograms are aligned along the reflective surface. The alignment target and UUT are movable together with respect to the alignment hologram until alignment of the wavefront of the alignment hologram upon the alignment target is detected.

An apparatus includes a waveguide and one or more partially reflective surfaces embedded inside the waveguide, wherein each of the one or more partially reflective surfaces includes a multi-layer coating structure, wherein a first portion of the multi-layer coating structure induces an overall phase shift of light propagating through the first portion of the multi-layer coating structure and wherein a second portion of the multi-layer coating structure is selected to decrease the overall phase shift.

A display system 700 comprising a replicator and a light control device 706, 706’. The replicator receives spatially modulated light, waveguides the light between a reflective surface and a transmissi

Mechanisms for adjusting atoms of an Intelligent Reflective Surface (IRS) are provided. A method is performed by a controller configured to control an IRS comprising an array of atoms, each having an individually adjustable phase shift and gain. At least some of the atoms are provided with a measurement sensor. The method comprises obtaining, from the measurement sensors, measurements of received power of a signal transmitted from a user equipment and received by the atoms and determining, by a gradient in received power between two of the measurement sensors is larger than a threshold value, that the user equipment is in near-field of the IRS. The method comprises, as a result thereof, adjusting the phase shift of a first subset of the atoms for reflection at the IRS of subsequent communication between a network node and the user equipment when the user equipment is in the near-field of the IRS.

A display system includes a replicator and a light control device 1000. The replicator receives spatially modulated light and replicates the light to form multiple replicas by waveguiding between a re

[Problem] To provide an imaging optical system having a small size, a large aperture, and high optical performance. [Solution] An imaging optical system according to the present invention has an aperture diaphragm, as well as a first transmissive reflective surface, a quarter-wave plate, and a second transmissive reflective surface arranged in order from the object side to the image side. Light coming from the object side is transmitted through the first transmissive reflective surface and the quarter-wave plate in order, is reflected toward the object side by the second transmissive reflective surface, is transmitted through the quarter-wave plate, is reflected toward the image side by the first transmissive reflective surface, and is transmitted through the quarter-wave plate and the second transmissive reflective surface in order toward the image surface. The total optical length, the distance on the optical axis from the first transmissive reflective surface to the image surface, the aperture diaphragm diameter, and the distance on the optical axis from the aperture diaphragm to the image surface are each set suitably.

The invention discloses a high-reflective surface defect detection method based on structured light and phase deflection, which belongs to the technical field of visual inspection, and comprises the following steps: generating a multi-frequency sinusoidal grating pattern by using a structured light module, and projecting the multi-frequency sinusoidal grating pattern to the surface of a detected object; multi-frequency phase shift coding is introduced, an absolute phase is calculated through a pilot frequency unwrapping method, a depth map obtained by the structured light is calculated, and a structured light point cloud is reconstructed; a unit normal vector is calculated, a Poisson reconstruction model is adopted to obtain a depth map obtained by phase deflection, and deflection point cloud is obtained; the structured light point cloud data and the deflection point cloud data are registered through an iterative nearest point algorithm and then fused to form a fused depth map; and determining a defect area by adopting the maximum principal curvature and the minimum principal curvature combined mask. By means of the mode, the limitation of a traditional three-dimensional measurement means in high-reflection and complex-curvature surface defect recognition is solved, and submicron-level three-dimensional deformation detection precision is achieved.

A lighting device disclosed in an embodiment of the invention comprises a substrate; a light source disposed on the substrate; and a light guide member disposed on the substrate and the light source, wherein the light guide member includes an exit surface and a first reflective surface facing the exit surface, the first reflective surface includes a plurality of reflective portions having different heights with respect to an upper surface of the substrate, and each of the plurality of reflective portions may include a plurality of first surfaces inclined with respect to the upper surface of the substrate.

An optoelectronic apparatus (100, 500) includes a dual folding mirror (114, 510) mounted on a carrier substrate (112, 524) with first and second reflecting surfaces (520, 522) disposed at opposite angles. A plurality of identical photonic integrated circuits (PICs 108, 110, 320, 502, 504, 506, 508) are disposed on the carrier substrate. Each PIC includes an array of optical transceiver cells (314, 400) on a planar substrate with respective edge couplers (406) along an edge of the planar substrate, and an optical distribution tree (320) coupled to convey coherent radiation to the optical transceiver cells. A first PIC is disposed on the carrier substrate such that the edge of the first PIC is in proximity to the first reflecting surface, and a second PIC is rotated by 180° relative to the first PIC such that the edge of the second PIC is in proximity to the second reflecting surface.

The optical system OS1 includes a first transmissive reflective surface HM1, a second transmissive reflective surface HM2 located closer to an image IM than the first transmissive reflective surface.

A light detection and ranging (LIDAR) system for a vehicle can include: a light source configured to output a transmit beam at a first orientation; a reflective surface configured to redirect the transmit beam from the first orientation to a second orientation; and a lens interface configured to receive the transmit beam at the first orientation and focus the transmit beam onto the reflective surface; wherein the LIDAR system emits the transmit beam at the second orientation into an environment of the LIDAR system.

A display system is provided The display system comprises a replicator arranged to receive spatially modulated light and replicate the spatially modulated light to form a plurality of replicas of the spatially modulated light by waveguiding between a reflective surface and a transmissive-reflective surface. The transmissive-reflective surface forms an output surface for the plurality of replicas of the spatially modulated light. The display system further comprises a light control device located in the optical path of the plurality of replicas of the spatially modulated light downstream from the output surface of the replicator. The light control device is arranged to compensate for the curvature of an curved optical component downstream from the light control device. The compensation is a function of the position on the output surface.

An optical member includes a light-transmitting light guide body and a light-shielding back cover. The light guide body has an incident part including a plurality of protruding incident prism portions, a reflective surface adjacent to the incident part, and an exit surface facing the incident part and the reflective surface. Each of the plurality of incident prism portions has an incident surface that allows an external scenery light to enter the inside of the light guide body and an adjacent surface adjacent to the incident surface. The back cover covers at least an entire area of the reflective surface of the light guide body across a gap, and abuts against the adjacent surface of a rear prism portion that is one of the plurality of incident prism portions adjacent to the reflective surface.

This disclosure relates generally to a composite reconfigurable intelligent surface system for real time beam steering and method thereof. Conventional method for real time beam steering includes bulky systems with several antenna elements and amplifiers to shape and control the beam. The present disclosure provides a composite reconfigurable intelligent surface (CRIS) for real time beam steering. The CRIS is formed from a set of constituent reflecting surfaces which in turn are generated from unit cells. These unit cells are responsible for providing individual phase reflection performance utilizing the installed varactor diode in each unit cell. The CRIS can provide a) multi-beam reflection performance, b) polarization sensitive operation, c) 2D beam steering abilities, d) real-time beam control, e) null point reduction for beam shaping requirements and f) dependable pattern stability over a suitable range of frequencies.

The invention relates to a head-up display device, a head-up display system and a vehicle. In one aspect, the head-up display device includes: a first image generation unit configured to emit first image light; the second image generation unit is provided with a first transflective surface, the second image generation unit is configured to emit second image light rays through the first transflective surface of the second image generation unit, and the first image light rays emitted by the first image generation unit and propagated to the second image generation unit are reflected through the first transflective surface of the second image generation unit; and a first imaging amplification unit configured to reflect the second image light emitted by the second image generation unit and propagated to the first imaging amplification unit and the first image light reflected by the second image generation unit and propagated to the first imaging amplification unit. According to the method and the device, virtual images of different distances can be formed to realize fusion of the virtual images and corresponding real scenes, so that the driving safety and the driving experience are improved.

The invention belongs to the field of virtual image display, particularly relates to a spherical reflection cavity virtual calibration method based on a neural radiation field, and aims to solve the problems that micron-level deviation is difficult to accurately capture due to interference of a high-reflection surface, and an executable correction instruction cannot be generated by fusing process constraints. The method comprises the following steps: deploying image acquisition equipment around a cavity to synchronously capture a multi-view optical image sequence; inputting a neural radiation field model, reconstructing a three-dimensional geometric structure and optical properties through a volume rendering technology, and dynamically optimizing and fitting reflection characteristics and curvature changes of a carbon fiber material; extracting spherical radius, local curvature and boundary contour parameters, and comparing the parameters with design specifications point by point to generate a deviation distribution diagram; generating a multi-level calibration instruction set based on the deviation distribution diagram in combination with the laying layer tolerance and the assembly clearance; and outputting an instruction to the manufacturing system to execute physical adjustment, and re-collecting the image to verify the calibration effect until the acceptance index is met. According to the invention, the deviation capturing precision is improved, and a correction instruction can be generated.

The invention provides a method for producing a 3D item by depositing 3D printable material, wherein the 3D printable material comprises core material and 3D printable shell material. The core material is one or more of (i) reflective, (ii) transmissive, (iii) absorbing, and (iv) luminescent for light having a wavelength in the visible wavelength range. The 3D printable shell material is transmissive for the wavelength in the visible wavelength range. A printed core-shell layer has a layer width (W) and a layer height and a first aspect ratio AR1, wherein AR1=W / H and wherein AR1>1. A cross-sectional plane of the core-shell layer comprises the layer width (W) and the layer height, and the core (330) provides a core cross-section having a first dimension (A1), which is the longest dimension of the core cross-section, and a second dimension (A2) perpendicular to the first dimension (A1), providing a second aspect ratio AR2, wherein AR2=A1 / A2, wherein 2=<AR2=<10,000; and wherein AR2 / AR1>=1.5, wherein the core (330) comprises two or more strip-like elements (337), wherein each of the two or more strip-like elements (337) has an element length (LE) individually selected from the range of at least the layer width (W), wherein LE>=*A1, and wherein the spacing distance (S) between two neighboring strip-like elements S=<10*LE.

A near-far field encryption method based on singular point amplitude characteristics comprises the following steps: 1) constructing a nano structure unit which is composed of a substrate and nano bricks deposited on the substrate; 2) optimizing parameters: optimizing the structural parameters of the nano brick through CST electromagnetic simulation software according to the selected working wavelength; 3) determining the structural parameters of the EP, and determining a singular point EP by using CST electromagnetic simulation software by changing the structural parameters of the nano brick; 4) determining phase distribution of the two holographic images IA and IB; (5) arranging a nanostructure array: according to the phase distribution of the two holographic images IA and IB determined in the step (4), obtaining a PB phase by changing the rotating angles of the two nano bricks to meet the phase distribution; (6) observing the nano array arranged in the step (5), enabling RCP light to enter from the front surface of the metasurface, detecting a first hologram IA on a reflecting surface, and displaying a pattern IC in a near field; lCP light is incident from the front surface of the metasurface, a second hologram IB can be detected on the reflecting surface, and a complementary pattern of the pattern IC is displayed in a near field. The method is ingenious in design, the phase information of the unit structure is manipulated, the near-field pattern is achieved through the amplitude difference, and the method can be used for simultaneous encryption of the near field and the far field.

A system projects a user-viewable, computer-generated or -fed image, wherein a head-mounted projector is used to project an image onto a retro-reflective surface, so only the viewer can see the image. The projector is connected to a computer that contains software to create virtual 2-D and or 3-D images for viewing by the user. Further, one projector each is mounted on either side of the user's head, and, by choosing for example a retro angle of less than about 10 degrees, each eye can only see the image of one of the projectors at a given distance up to 3 meters, in this example, from the retro-reflective screen. The retro angle used may be reduced with larger viewing distance desired. These projectors use lasers to avoid the need for focusing, and in some cases these projectors use instead of lasers highly collimated LED light sources to avoid the need for focusing.

The present disclosure relates to estimating a channel in a wireless communication system, and a method for operating a user equipment (UE) may a method for operating a user equipment (UE) in a wireless communication system may include receiving configuration information related to channel measurement from a base station, receiving reference signals for the channel measurement, generating channel information by using the reference signals, and transmitting the channel information to the base station. The reference signals may be transmitted from the base station, reflected in portion of reflecting surfaces included in a reflecting intelligent surface (RIS), and then received by the UE, and the configuration information may include information indicating a number or location of at least one off-reflecting surface among the reflecting surfaces.

The invention discloses a light beam drift automatic compensation device of a high-power laser processing head, and the implementation process of a light beam detection module comprises the following steps: a laser main light beam is firstly divided into transmission light and two beams of reflection light (detection light) by two reflection surfaces of an optical wedge, and the two beams of detection light are respectively converged on a position photoelectric detector and a CMOS (Complementary Metal-Oxide-Semiconductor Transistor) camera through a focusing lens; through data information fusion of the position photoelectric detector and the CMOS camera, light spot shape information obtained by the CMOS camera can be complementary with the high-precision angle measurement capability of the position photoelectric detector, and the measurement precision of light spots in various shapes is improved while high resolution and high response speed of detection are ensured. Whether the incident light beam deflects relative to the incident direction or not is judged according to the angular offset theta, measured by the light beam detection module, of the light beam, and the transmitted light automatically compensates the deflected light beam through the light beam compensation module, so that the emergent light beam and the incident light beam keep the same optical axis and are emergent perpendicular to the incident plane.

A display system is provided. The display system comprises a replicator arranged to receive spatially modulated light and replicate the spatially modulated light to form a plurality of replicas of the spatially modulated light by waveguiding between a reflective surface and a transmissive-reflective surface. The transmissive-reflective surface forms an output surface for the plurality of replicas of the spatially modulated light. The display system further comprises a light control device located in the optical path of the plurality of replicas of the spatially modulated light downstream from the output surface of the replicator. The light control device is arranged to provide a first compensation for the curvature of a curved optical component downstream from the light control device. The first compensation is a function of the position on the output surface and is arranged to only partially counteract the curvature of the optical component and retain some distortion from the curvature of the optical component of at least one of the replicas compared to another of the replicas.

A system that performs wall direction estimation to determine a position of an acoustically reflective surface relative to a device. For example, the device may detect a direct sound received from an active sound source and a first reflection reflected from a nearby wall. Based on a time delay, the device can estimate a direction and / or distance to the wall. For example, the device determines a time differential of arrival (TDOA) between the direct sound and the first reflection for each microphone in a microphone array. The device combines TDOA values of the entire microphone array into a distance vector, which the device can compare to reference distance data to determine the best wall direction estimate. For example, reference distance values are fixed based on a geometry of the microphone array and the device can identify an azimuth value that is most similar to the distance vector.

The invention relates to an optically variable security element (12) for securing valuables (10), having a reflective surface area (14) containing a plurality of reflective pixel elements (20) which together produce an optically variable motif representation, the appearance of which changes when the security element is tilted along a first direction (16) in the plane of the reflective surface area.According to the invention, it is provided that the pixel elements (20) along the first direction (16) each have an inclination to the reflective surface region (14) which is constant except for any isolated discontinuities, that the pixel elements (20) along a second direction (18) perpendicular to the first direction in the plane of the reflective surface region each have an inclination to the reflective surface region (14), which inclination varies in the entire surface region (14) or in two or more partial surface regions (52, 54; 60, 62, 64) visible to the naked eye, in each case except for any isolated discontinuities, within a predetermined inclination range, whereby the optically variable motif representation appears with a substantially uniform brightness in the entire surface region or in the said partial surface regions when tilted along the second direction (18).

A display system comprises a replicator arranged to receive spatially modulated light and replicate the spatially modulated light to form a plurality of replicas of the spatially modulated light by waveguiding between a reflective surface and a transmissive-reflective surface, which forms an output surface for the plurality of replicas of the spatially modulated light. The display system further comprises a light control device located in the optical path of the plurality of replicas of the spatially modulated light downstream from the output surface of the replicator, arranged to provide a first compensation for the curvature of a curved optical component downstream from the light control device. The first compensation is arranged to only partially counteract the curvature of the optical component and retain some distortion from the curvature of the optical component of at least one of the replicas compared to another of the replicas.

The invention relates to an eyewear display system (1) for displaying a virtual image in a field of view of a user, the eyewear display system comprising: a display unit (14) for emitting light (163", 161'', 162'') as computer-generated image information in an emission direction; a deflection unit (17) for deflecting the light (163", 161'', 162'') emitted by the display unit (14) as computer-generated image information into an eye (10) of the user; and a plurality of micromirror elements (12, 12', 12"), each of which can be tilted in a support structure (200) and each of which has a reflective surface (25) for deflecting the light (163", 161", 162") emitted by the display unit (14) as computer-generated image information; wherein the micromirror elements (12, 12', 12'') and the support structure (200) are arranged in a sealed housing element (17a) of the deflection unit (17), said housing element being filled with a liquid (23), in order to provide an eyewear display system (1) which offers improved immersion.