1088 results about "Reflective surfaces" patented technology

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.

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.

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.

A method of wireless communication at a user equipment (UE) is provided. The method includes receiving, from a scheduling entity, an indication of at least two different cross link interference (CLI) measurement resources of a message for transmission from a transmission source. The method also includes receiving, from an intelligent reflecting surface (IRS), a reflected transmission of the message originating from the transmission source, wherein the reflected transmission of the message is reflected by the IRS based on one or more IRS coefficients. The method further includes determining one or more CLI measurement parameters to generate a report. The method includes transmitting, to the scheduling entity, a CLI measurement report. The method also includes receiving, from the IRS, another reflected transmission of the message originating from the transmission source using one or more configured IRS coefficients that are configured based on the CLI measurement report.

Imaging lens arrangement (100), comprising: an optical plastic element (110), comprising: an incidence surface (111), wherein an imaging light enters the optical plastic element (110) through the incidence surface (111); a reflective surface (112), wherein the imaging light changes direction through the reflective surface (112); an exit surface (113), wherein the imaging light exits the optical plastic element (110) through the exit surface (113); and at least one connecting surface (130) which is used to connect the incident surface (111), the reflecting surface (112) and the exit surface (113), wherein the at least one connecting surface (130) comprises: a sprue (131) which is arranged on the at least one connecting surface (130), and wherein the sprue (131) is raised relative to an adjacent section (134) of the at least one connecting surface (130); a divergent nozzle surface (132) connected to the sprue (131) and the adjacent section (134), wherein the divergent nozzle surface (132) diverges from the sprue (131) and extends in a direction of the adjacent section (134); and a gate remnant (133) which is arranged on a surface of the sprue remnant (131), wherein a contour of the gate remnant (133) is linear and the gate remnant (133) extends over the surface of the sprue remnant (131); wherein, when projected along a direction in a front view of the adjacent section (134) of the at least one connecting surface (130), a projection surface of the divergent nozzle surface (132) is As, a projection surface of the sprue residue (131) is Ag, and the following condition is met: 0.08 ≤ As / Ag ≤ 0.68.

The invention provides a multi-reflection superposition enhanced microwave displacement measurement method and system, and the method comprises the steps: S1, constructing a microwave multi-reflection propagation path, enabling a microwave radar to transmit electromagnetic waves to the microwave multi-reflection propagation path as a transmission signal, and receiving a corresponding echo signal; s2, extracting length change information of a microwave multi-reflection propagation path according to the echo signal; s3, establishing a linear superposition relation model between the total length of the microwave propagation path and respective displacements of W reflection surfaces in the microwave multi-reflection propagation path; w2; and S4, based on the linear superposition relation model, displacement information of the corresponding reflection surface is obtained and output. According to the invention, a larger phase variation can be obtained under the condition of small displacement or weak vibration, so that the measurement sensitivity is improved and the signal-to-noise ratio is improved.

Certain aspects of the present disclosure provide techniques for compensating for certain characteristic(s) of an intelligent reflecting surface (IRS). A method that may be performed by a first wireless node includes obtaining an indication of a correction for an IRS to compensate for one or more characteristics of the IRS and communicating with a second wireless node via the IRS using the indication of the correction.

A cap having a closed end and one or more openings is attached to the tip of an optical Raman probe sensor. The cap serves to block stray light noise from entering the tip of the sensor. In this way, Raman spectra may be more accurate and consistent. Further, the cap may be permanently affixed or removably attached to the sensor. In some embodiments, a reflective surface may be included on the interior surface of the closed end of the cap. This reflective surface may reflect Raman scattering light toward the tip, enhancing the received signal by a factor of 2 to 100.

A Kaleidoscopic Geometric Vision Platform (KGVP) that transforms three-dimensional (3D) machine vision through an optical system that creates multiple virtual laser projectors from a single moving component. A spindle mirror mechanism (SMM) rotates a reflective surface to sweep collimated laser beams in circular patterns. These beams strike a series of kaleidoscopic mirror facets (KMFs) arranged concentrically around the SMM in a concave configuration. Each KMF redirects the rotating beam, creating a virtual projector with a distinct origin point and sweep direction. As the SMM completes one rotation, it generates N distinct laser trajectories (where N equals the number of KMFs), each sweeping from a different virtual origin point. Event-based cameras / sensors positioned strategically around the KMFs detect laser light reflected from object surfaces with microsecond precision. The KGVP triangulates 3D surface coordinates by determining correspondence between detected light and specific virtual projectors based on precise timing information.

Aspects of the present invention relate to providing see-through computer display optics. In embodiments, a wearable head device comprises a frame, a first optical module comprising a first reflecting surface, a second optical module, electronic components, and a heat sink. The electronic components may be disposed adjacent to the frame and further disposed between the first reflecting surface and the second optical module. The electronic components may comprise a processor. The electronic components may be configured to rest a first distance from the head of a user of the wearable head device. The heat sink may be disposed between the first reflecting surface and the second optical module and configured to rest a second distance from the head of the user, the second distance greater than the first distance. The heat sink may be thermally coupled to the processor.

An EUV collector (24) is used in an EUV projection exposure system. The EUV collector (24) is designed to guide EUV useful light (3) from a source area (19) to a collecting area (26). The EUV collector (24) has at least one reflective surface area (28) which has the shape of a segment of an ellipsoid with two ellipsoidal focal points (F1, F2). The source area (19) is located in the region of one of the ellipsoidal focal points (F1), and the collecting area (26) is located in the region of the other ellipsoidal focal point (F2). The reflective surface area (28) has a maximum collecting angle S2 greater than 120° for useful light beams emanating from the source area (19). Alternatively or additionally, the reflection surface area (28) has at least two detachably connected reflection surface sub-areas, each representing sub-areas of a shape of a section of an ellipsoid with two ellipsoid focal points (F1, F2).

A light guide includes: a light entrance section which has a light entrance surface to which light is input, reflective surfaces and a light transmitting section, the reflective surfaces reflecting a part of the light input, and the light transmitting section transmitting another part of the light input and reflected light reflected by the reflective surfaces; a light guiding section which has a light exit surface, and guides the reflected light so that it is output from the light exit surface; and a continuous section and a non-continuous section. A large part of the light collected by the light entrance section can be output from the light exit surface, by a part of the light input being reflected by the reflective surfaces and the reflected light entering the light guiding section from the light transmitting section via the continuous section to be guided within the light guiding section.

The technology described herein is directed towards determining a phase shift matrix for an intelligent reflective surface based on active tag-enhanced sensing that provides calibrated orientation data and distance data of the intelligent reflective surface relative to a transmission-reception point, such as a radar system, base station or wireless access point. The calibration data is based on accurate estimation of element distances to the intelligent reflective surface elements. Based on the calibration data, a phase shift matrix for the elements of the intelligent reflective surface is determined. The phase shift matrix can be used in optimizing the intelligent reflective surface for redirected communications with a target. Other calibration data can be obtained at the target for element distances of the intelligent reflective surface relative to the target. An approximate position of a target can be determined by using the intelligent reflective surface with a radar system at the transmission-reception point.

The invention relates to a fringe projection high-reflection surface phase unwrapping method based on frequency reuse. The fringe projection high-reflection surface phase unwrapping method comprises the steps of collecting a multi-frequency fringe image and dividing the multi-frequency fringe image into an overexposure area and a non-overexposure area, solving a wrapped phase in the non-overexposure area by adopting a generalized phase shift method, obtaining an initial unwrapping phase based on a multi-frequency heterodyne algorithm, and performing block filtering and interpolation processing to obtain a fringe projection high-reflection surface phase unwrapping phase. A continuous unwrapped phase containing a high-reflection area is obtained, a complementary Gray code consistent with a wrapped phase period is constructed in combination with a multi-threshold constraint and is used for correcting the stripe level of an overexposure area, brightness attenuation design is further carried out on low and medium frequency stripes, frequency reuse is achieved, and the high-reflection area is obtained. Obtaining an unwrapped phase of an overexposure point in a non-high-frequency stripe and mapping the unwrapped phase to a high frequency; the method comprises the following steps of: extracting and fusing a wrapped phase by adopting one-dimensional Fourier and Hilbert transform for areas with overexposure of each frequency, and selecting and inhibiting spectrum leakage through a complete period, so that effective correction of the wrapped phase and stripe level of an overexposure point is realized, and a reliable unwrapped phase is obtained.

The present application relates to a three-dimensional reconstruction method and system based on a laser-rotating polygon mirror, and a medium. The method comprises: acquiring line laser; changing the offset angle of the line laser by synchronously controlling laser power and the rotation angle of a rotating polygon mirror, so as to output a multi-modal laser-encoded pattern; determining a signal compensation amount on the basis of a non-linear relationship between spatial coordinates of an imaging end and the rotation angle, and a coordinate relationship between an initial reflective surface and a rotating reflective surface; compensating the multi-modal laser-encoded pattern on the basis of the signal compensation amount to output a target multi-modal laser-encoded pattern; and reconstructing three-dimensional coordinates on the basis of the target multi-modal laser-encoded pattern. A signal compensation amount is accurately determined by means of a non-linear relationship between spatial coordinates of an imaging end and an offset angle of line laser, and a coordinate relationship between an initial reflective surface and a rotating reflective surface, thereby eliminating measurement deviations caused by system errors or environmental factors.

Certain aspects of the present disclosure provide techniques for compensating for certain characteristic(s) of an intelligent reflecting surface (IRS). A method that may be performed by a first wireless node includes obtaining an indication of a correction for an IRS to compensate for one or more characteristics of the IRS and communicating with a second wireless node via the IRS using the indication of the correction.

A retinal projection display system includes at least one visible light source for projecting a visible light image, an infrared light source for projecting infrared light, a scanning mirror having a field of view larger than the visible light image, a reflective surface on which the visible light image is projected and on which the infrared light is reflected at least partially towards an eye of a user, wherein the reflective surface is larger than the visible light image, at least one infrared photodetector for receiving reflected infrared light that reflects off of the eye of the user, and a hardware computation module comprising a processor and a memory, the hardware computation module configured to determine a gaze direction of the user based at least in part on the reflected infrared light.

A Kaleidoscopic Geometric Vision Platform (KGVP) that transforms three-dimensional (3D) machine vision through an optical system that creates multiple virtual laser projectors from a single moving component. A spindle mirror mechanism (SMM) rotates a reflective surface to sweep collimated laser beams in circular patterns. These beams strike a series of kaleidoscopic mirror facets (KMFs) arranged concentrically around the SMM in a concave configuration. Each KMF redirects the rotating beam, creating a virtual projector with a distinct origin point and sweep direction. As the SMM completes one rotation, it generates N distinct laser trajectories (where N equals the number of KMFs), each sweeping from a different virtual origin point. Event-based cameras / sensors positioned strategically around the KMFs detect laser light reflected from object surfaces with microsecond precision. The KGVP triangulates 3D surface coordinates by determining correspondence between detected light and specific virtual projectors based on precise timing information. This approach eliminates the computational complexity typically required for multi-view feature matching, as the KGVP can unambiguously identify which virtual projector created each detected event. With calibration, the KGVP can establish the exact 3D positions of all virtual projector origins and their beam trajectories and build look-up tables that optimize triangulation accuracy. The KGVP enables real-time 3D surface reconstruction with high precision while using far fewer mechanical components than conventional machine vision systems.

The invention relates to a structured light imaging system suitable for semiconductor SIP system-in-package, which comprises a central camera, and a plurality of groups of DLP projections and side cameras are symmetrically arranged on two sides of an optical axis of the central camera; the DLP projector emits parallel light beams to irradiate the surfaces of the crystal grains, and the side cameras receive reflected light rays in parallel; the device further comprises a control unit, and the control unit sequentially controls the DLP projectors and the side cameras which are symmetrically arranged in pairs to synchronously work and processes image data so as to reconstruct the three-dimensional morphology of the surface of the crystal grain. When incident light emitted by the DLP projector irradiates the surface of the crystal grain at a specific angle, specular reflection light of the incident light propagates in the symmetrical direction according to the reflection law. The side camera and the DLP projector are symmetrically arranged, so that the optical axis of the side camera is consistent with a reflection light path, and a highlight area image generated by mirror reflection is accurately captured. The layout breaks through the limitation of the traditional diffuse reflection hypothesis, so that the morphology information of the high-reflection surface can be completely acquired, and the accuracy and reliability of crystal grain three-dimensional reconstruction in SIP packaging are remarkably improved.

An avian distractor device includes a clamp having a pair of jaws attached to a hinge and biased via a plurality of springs into a closed position, and a locking member disposed in communication with the pair of jaws to rigidly hold a conductor of different sizes under a force generated by the plurality of springs. A spherical diverter is provided and is rotatably attached to the hinge and the clamp. A reflective surface encircles a central portion of the spherical diverter to enhance visibility of the device to wildlife. A plurality of dimples are formed on an external surface of the spherical diverter to reduce a drag force on the device.

The invention belongs to the technical field of intelligent traffic, and particularly relates to a vehicle-road cloud integrated communication method based on communication-perception-reflection cooperation. Comprising the following steps: step 1, constructing an integrated sensing and communication system model assisted by an intelligent reflecting surface; step 2, base station active beam forming optimization based on equivalent conversion; thirdly, IRS passive beam forming is optimized through multi-agent reinforcement learning; step 4, alternative optimization and system deployment; the method is used in the scene that obstacles such as buildings and large vehicles exist on urban roads, and the problems of communication interruption and sensing failure in a non-line-of-sight area are solved through an intelligent reflecting surface auxiliary integrated sensing and communication system. According to the method, the active wave beams and the passive wave beams of the base station are alternately optimized, and the communication rate and the radar detection performance are jointly improved on the premise that accurate channel state information is not needed.

The invention relates to an optical element (1) for reflecting radiation (2) in the VUV wavelength range, comprising: a surface (4a, 4a'), and a dielectric multilayer coating (5) applied to the surface (4a, 4a'). The dielectric multilayer coating (5) is designed for the particularly broadband reflection of radiation (2) in the VUV wavelength range. The surface (4a, 4a') is formed from a preferably metallic base material that has a reflectivity of 60% or less, particularly 50% or less, in the VUV wavelength range. Preferably, the base material for reflecting radiation (3) in the UV / VIS wavelength range has a reflectivity of at least one wavelength (λ). VIS) exhibits a reflectivity of more than 50%, preferably more than 70%, particularly preferably more than 80%, and especially more than 90% in the UV / VIS wavelength range. The invention also relates to an optical arrangement for the VUV wavelength range, which comprises at least one such optical element (1).

An air cushion tube light includes a reflector which is provided with an accommodating cavity having an open end surface, the inner side surface of the reflector is a reflective surface; an air cushion which comprises an inflatable main body portion, the side surface of the main body portion includes a soft light surface and a light-transmitting surface arranged opposite to each other, the air cushion is disposed at the opening of the accommodating cavity, the reflector corresponds to and covers the light-transmitting surface of the air cushion, and the soft light surface can scatter light; and tube lights disposed in the accommodating cavity of the reflector and located between the reflective surface of the reflector and the light-transmitting surface of the air cushion, the light emitted from the tube lights passes through the light-transmitting surface, and then is emitted through the soft light surface.

Provided is a phase modulation device capable of controlling a phase by increasing the output of a laser beam. The phase modulation device comprises: at least one mirror including a reflective surface; and a plurality of driving elements arranged on a side opposite to the reflective surface of the at least one mirror, wherein the reflective surface is displaced by the plurality of driving elements.

A touch sensing apparatus is disclosed, comprising a light transmissive panel that defines a touch surface, an opposite rear surface, and panel sides extending between the touch surface and rear surface. The panel sides define a perimeter of the light transmissive panel. The touch sensing apparatus comprises a plurality of light emitters and detectors arranged along the perimeter and adjacent the panel sides, a light guide arranged along the perimeter and having a first reflective surface comprising a diffusive light scattering element. The light emitters are arranged to emit a respective beam of light onto the diffusive light scattering element so as to generate propagating light that diffusively propagates above the touch surface, wherein the light detectors are arranged to receive detection light generated as said propagating light impinges on the diffusive light scattering element, and wherein the diffusive light scattering element is arranged at least partly outside the panel sides and extending at least partly above the touch surface.

The objective of the invention is to provide the imaging lens and the imaging device, and the imaging lens and the imaging device can achieve the lightening and thinning of the body of the imaging device, and can shorten the shortest shooting distance. According to the transmission sequence of light from an object side, the imaging lens provided by the invention sequentially comprises a diaphragm; the lens group comprises at least one lens with positive focal power and at least one lens with negative focal power; and the reflection light guide element is used for emitting the light to the imaging element. One of the at least one lens with the positive focal power is made of a glass material, the reflection light guide element is provided with a plurality of reflection surfaces, and a light path is reflected on the plurality of reflection surfaces for multiple times.

The invention discloses a mechanical non-resonant one-bit phase electromagnetic reflection metasurface unit, and belongs to the field of artificial electromagnetic materials. The unit comprises a non-resonant electromagnetic structure and a mechanical driving device. The non-resonant electromagnetic structure comprises a dielectric layer, an air layer and an adjustable metal backboard from top to bottom; the mechanical driving device adopts a bidirectional self-holding electromagnet, a screw rod of the bidirectional self-holding electromagnet is connected with the metal back plate, the back plate is driven to be switched between two preset positions through forward / reverse pulse current, the thickness of an air layer is accurately adjusted, and therefore one-bit dynamic switching of a reflection phase between 0 degree and 180 degrees is achieved through propagation phase accumulation. In the 5G millimeter wave frequency band of 20 GHz to 29.5 GHz, the reflection coefficients of the two states are both larger than 0.99, the phase difference is stabilized within 180 degrees + / -20 degrees, and good robustness is achieved for mechanical displacement deviation. The unit has the advantages of zero static energy consumption, low insertion loss, wide bandwidth, simple structure and simple control, and is suitable for a low-power-consumption intelligent reflecting surface and a dynamic beam forming system.

The invention discloses a communication anti-interference method assisted by a plurality of closed intelligent reflecting surfaces on a receiving side, and the method comprises the steps: constructing a closed space selection structure formed by a plurality of RIS panels in a surrounding manner, placing a receiving antenna in the closed space selection structure, and enabling each RIS unit to independently regulate and control the transmission or reflection state of incident electromagnetic waves; according to the relative position of a receiving antenna and an external signal source, the space outside the structure is divided into different signal areas, and each signal area is covered by an RIS panel; and according to the signal area where the signal source is located, adjusting the working mode of the RIS unit of each signal area: adjusting the RIS unit of the signal area where the signal source is located to a transmission mode, and adjusting the RIS units of other signal areas to a reflection mode. According to the invention, the reachable transmission rate and the anti-interference capability of a communication system are improved, the problem of signal interference in a complex environment is solved, and efficient and reliable communication in a complex interference environment is realized.

A vehicle lamp includes a first light source configured to emit light in a direction along a vertical direction; a first reflector having a first reflective surface that allows a portion of the light emitted from the first light source to be reflected forward; a second reflector having a pair of second reflective surfaces that allow light traveling without being reflected by the first reflective surface to be reflected leftward and rightward; a third reflector having a pair of third reflective surfaces that allow light reflected by the second reflective surfaces to be reflected forward; and a first lens that allows light reflected by the first reflective surface and light reflected by the pair of third reflective surfaces to exit forward through an exit surface. A maximum length of the first lens in the vertical direction is smaller than a maximum length of the first lens in a left-right direction.

The invention discloses a high-efficiency ultraviolet light source and a packaging method thereof. The ultraviolet light source comprises a substrate, an ultraviolet LED chip and a light window, an inner electrode layer and a welding layer are arranged on the upper surface of the substrate, and the ultraviolet LED chip is welded on the inner electrode layer; the light window comprises a lens and an integrated tube shell; the integrated tube shell comprises a surrounding shell arranged around the ultraviolet LED chip and a reflection cup located on the inner side of the surrounding shell and arranged around the ultraviolet LED chip. A horizontal part extending outwards is arranged at the lower end of the surrounding shell, and the bottom surface of the horizontal part and the welding layer of the substrate are sealed and welded together; the upper surface of the reflection cup is constructed to be a reflection surface which is gradually raised from inside to outside, and a reflection layer is arranged on the reflection surface; the surrounding shell and the reflection cup are integrally formed, a downward-concave welding flux groove is formed in the connecting position of the surrounding shell and the reflection cup, a welding flux ring is arranged in the welding flux groove, and the edge of the lower surface of the lens is pressed on the welding flux ring and welded and fixed. The invention has the advantages of low light loss and high light extraction efficiency.