435 results about "Optical reflection" patented technology

The invention relates to the technical field of medical instruments, and discloses a laparoscope and digestive endoscope combined positioning measurement system and method.The method comprises the steps of positioning mark initialization, image feature analysis, instrument path planning, dynamic positioning calibration, operation integrity evaluation and the like. Spatial matching is realized by setting multiple types of positioning marks and utilizing optical reflection signals, noise reduction and feature extraction are performed on endoscope imaging data to generate a measurement area boundary, an operation path is planned in combination with anatomical path information, the tail end position of an instrument is calibrated in real time, and operation integrity is evaluated. The system comprises a positioning module, an analysis module, a correction module and an integration module which are respectively used for realizing the functions of positioning mark setting, image processing and path generation, offset correction and operation evaluation. According to the system, the operation positioning precision and the operation safety are improved, intellectualization and precision of minimally invasive surgery are achieved, and the system is suitable for minimally invasive treatment of digestive system diseases.

The invention provides a home overall design method and system based on virtual reality. Wherein indoor environment data are collected in real time in a spatial gridding mode through a distributed temperature and humidity sensor array and a multispectral illumination sensor, and heterogeneous data are fused by using a spatial topology association engine to generate a three-dimensional environment parameter set. And based on the space coordinate weight matrix of the parameter set, driving a micro-electro-mechanical execution unit of the dynamic optical reflection film layer to adjust the surface inclination angle and the refractive index so as to form an optical reflection characteristic distribution diagram. And a three-dimensional light field model dynamically linked with physical illumination distribution is further constructed in the virtual scene, adaptive compensation operation of temperature and humidity parameters is triggered in real time according to physical space illumination intensity changes, characteristic parameters of the reflecting film layer are synchronously and reversely regulated and controlled, and a closed-loop control link is formed. According to the technical scheme provided by the invention, the full-dimensional precise synchronization of the optical characteristics of the material, the temperature and humidity influence and the illumination distribution in the home design scene is realized.

The invention provides an underwater target identification method and system based on 4K visible light polarization imaging, and relates to the technical field of underwater target identification. High-resolution spectral intensity information and polarization physical characteristics of a target are synchronously captured by using a pixel-level registration RGB and polarization four-dimensional light field tensor coding technology; the limitation of information loss of single-mode data in a low-illumination or high-turbidity scene is overcome; the polar coordinate symmetry design of the annular direction sensitive convolution kernel is combined with the polarization degree matrix decomposition technology of the Fresnel reflection law to accurately quantify the optical reflection characteristic difference of the material; based on a cross-modal attention mechanism, dynamically learning a correlation weight of a spatial feature and a polarization feature, and strengthening a joint response of a target edge contour and an internal texture; a lightweight recognition network architecture is adopted, a polarization sensitive convolution kernel and a dynamic channel re-parameterization module are integrated, parallel efficient reasoning of target position, category and material information is achieved, and accurate recognition of an underwater target is achieved.

The invention discloses lithotripsy equipment and a control method thereof. The lithotripsy equipment comprises a lithotripsy device, an optical tracking device, a display and control device and an ultrasonic imaging device, the lithotripsy device comprises a mechanical arm module, a shock wave module and a control module; the mechanical arm module and the shock wave module are both electrically connected with the control module, and the control module and the optical tracking device are both electrically connected with the display and control device. The ultrasonic imaging device comprises a handheld ultrasonic probe; the handheld ultrasonic probe is in communication connection with the display and control device; the mechanical arm module comprises a mechanical arm, the shock wave module comprises a shock wave generator, and the shock wave generator is arranged at the front end of the mechanical arm; and a plurality of optical reflection markers are arranged on the backs of the handheld ultrasonic probe and the shock wave generator. According to the lithotripsy equipment provided by the embodiment of the invention, the intelligent degree of the extracorporeal shock wave lithotripsy machine is improved, the extracorporeal shock wave lithotripsy treatment process is simplified, and the treatment positioning precision is improved.

An apparatus and methods are provided for a gunsight and sighting system for use on firearms. The gunsight and sighting system comprises a mount portion coupled with a hood portion. A projection window with a collimated image overlay is secured to the mount portion by the hood portion. A front sight dot is forward of the projection window, while two rear sight dots are rearward of the mount portion. The sight dots may be illuminated by any of various desirable colors to enhance visibility in various lighting conditions. Light sensors disposed at the front of the mount portion detect ambient light and / or light in a target area and accordingly adjust the illumination of the sight dots. The light sensors may be disposed in asymmetric locations of the mounting portion to overcome interference due to light arriving at angles other than in front of the gunsight and sighting system.

The invention discloses a dynamic multi-spot projection optical system based on an LED light source, which comprises the LED light source, a reflecting cover, a grating sheet, a condensing lens, a concave reflector and an optical reflection assembly, and is characterized in that the LED light source is arranged at the bottom of the reflecting cover, and the grating sheet is provided with a light-transmitting area with a preset pattern shape; the reflecting cover consists of a plurality of plane reflectors A; the concave reflector consists of a plurality of plane reflectors B; light emitted by the LED light source forms a pattern light beam through the grating piece, the light beam is divided and reflected into a plurality of sub light beams through the conical reflecting cover, and the sub light beams are guided to the condensing lens through the optical reflecting mirror set. According to the invention, a low-cost, laser-free and safe LED scheme is adopted, and through innovative optical design, a complex dynamic light and shadow effect comparable to or even surpassing laser projection is realized, and the imaging definition is kept unchanged within a projection distance range of 2-15 meters.

The invention discloses a rotating mirror scanning light path system for generating point ring light and a control method thereof. The light path system comprises a light source module used for outputting laser; the shaping and focusing module comprises a rotary reflecting mirror and an arc-shaped reflecting mirror which are sequentially positioned on a laser light path; the rotating reflector comprises a central area and an outer ring area, the outer ring area surrounds the central area, and the curvature radiuses of the central area and the outer ring area are different; the rotary reflecting mirror is used for reflecting the laser and shaping the laser into a point annular light spot; the arc-shaped reflector is used for focusing the annular spot; the control module is used for controlling the rotating reflector to rotate around the rotating shaft, and laser scanning in the first direction is achieved. And the control module is also used for controlling the rotary reflector and the arc reflector to integrally move and rotate to realize line scanning and rotary scanning of the laser in the second direction. According to the laser shaping device, only two arc-shaped optical reflectors and one optical fiber output laser are needed, laser can be shaped into point annular light spots, splashing can be reduced, the porosity can be reduced, and the machining quality can be improved.

The invention provides a full-automatic laser vision coding machine and a coding path optimization method. The method comprises the following steps: acquiring three-dimensional point cloud data of a target object; performing spatial calibration on the three-dimensional point cloud data according to the point cloud distribution diagram of the three-dimensional calibration block so as to determine curvature field distribution required for performing light beam path compensation on the target object; based on the curvature field distribution and the surface material distribution of the target object, determining an absorption response curve of laser beams in all coding regions in a region boundary range when the target object is coded; determining an energy compensation factor corresponding to each coding area according to an energy attenuation rate of laser energy in the absorption response curve and an optical reflection coefficient of each coding area in an area boundary range during coding; and when it is detected that the absorption response curve of the target object deviates from a preset standard curve, generating a dynamic coding path of the target object based on all the energy compensation factors. According to the scheme, the laser coding path can be optimized to compensate energy attenuation in the coding process.

The invention relates to the technical field of illumination angle adjustment, in particular to a tea table illumination angle adjustment control method and system, and the method comprises the following steps: obtaining optical reflection characteristic data of a desktop area, three-dimensional geometric data of an article and user observation point information, and constructing a space model for illumination evaluation; when it is monitored that the desktop environment changes, the changes include that an object enters an unstable state, whether the illumination state touches a preset judgment threshold value or not is evaluated based on the current light source projection angle, and the judgment threshold value comprises a glare threshold value, an illumination uniformity threshold value and a secondary reflection avoidance threshold value; if any judgment threshold value is touched, re-calculation and adjustment of the current light source projection angle are started; and if any judgment threshold is not touched, the current light source projection angle is maintained. The problems of glare, uneven illumination, secondary reflection and the like are effectively solved, and the visual comfort of a user is improved.

The invention relates to the technical field of photoacoustic spectrometry, in particular to a gas detection device and method based on a 3D printing Helmholtz photoacoustic cell, and is suitable for the fields with load requirements such as unmanned aerial vehicle-mounted gas monitoring platforms. In order to overcome the problems of large volume, heavy weight, complex structure and low integration level of a photoacoustic gas sensor in the prior art, the lightweight Helmholtz photoacoustic cell structure manufactured based on 3D printing comprises a sound wave generation cavity, a small-diameter connecting pipe and a detection cavity which are integrally formed, an optical reflection unit is integrated in the sound wave generation cavity, and the optical reflection unit is integrated in the detection cavity. Two concave reflectors are arranged to reflect incident light beams for 160 times, a laser, an optical fiber collimator, a pre-amplifier, a lock-in amplification circuit board, a notebook computer and a current temperature control module are arranged outside, and the concentration of gas to be detected is obtained through analysis and processing of the notebook computer.

Embodiments of the present disclosure provide a passive optical network (PON) coexistence method and apparatus. The method comprises: at a same moment, controlling one of a 50G PON downlink signal and an EPON & 10G EPON uplink optical signal to be transmitted in a PON optical path, wherein the 50G PON downlink signal comprises a 50G PON downlink optical signal and / or a 50G PON downlink optical reflection signal, and the EPON & 10G EPON uplink optical signal comprises an EPON uplink optical signal and / or a 10G EPON uplink optical signal.

A device includes a photonic integrated circuit (PIC) of a PIC structure. The PIC includes a substrate and a waveguide structure disposed on a first side of the substrate. The waveguide structure includes an optical reflector disposed on a waveguide. The device further includes a set of optical elements of the PIC structure. The set of optical elements is formed on a second side of the substrate opposite the first side of the substrate. The optical reflector is configured reflect an optical signal received from the waveguide toward the set of optical elements.

The invention discloses a muon monitoring device and a tunnel monitoring method thereof.The muon monitoring device comprises multiple layers of muon detection modules which are arranged in a laminated mode in the height direction, and each layer of muon detection module comprises a shell, a scintillator array, an optical reflection shielding layer, a front-end signal processing plate and a signal leading-out plate, and the scintillator array, the optical reflection shielding layer, the front-end signal processing plate and the signal leading-out plate are arranged in the shell; the scintillator array is arranged between the optical reflection shielding layer and the front-end signal processing board, and the front-end signal processing board of the muon detection module on the upper layer and the optical reflection shielding layer of the muon detection module on the lower layer of two adjacent layers are arranged oppositely, the scintillator array comprises a plurality of scintillator units arranged in a two-dimensional matrix mode, a photomultiplier is arranged at the bottom of each scintillator unit, the photomultipliers are fixedly installed on the front-end signal processing board, and the front-end signal processing board is in signal connection with the signal leading-out board arranged at the edge of the scintillator array.

The invention relates to the technical field of semiconductor packaging, and discloses a bonding wire welding method based on bare chip interconnection, and the method comprises the steps: collecting and fusing acoustic response and optical reflection signals of a bonding interface in real time through a multi-mode in-situ sensing mechanism integrating acoustic resonance and surface plasmon resonance; dynamically calculating the thickness, the mechanical coupling deformation and the energy dissipation state of the intermetallic compound layer; and the ultrasonic power and the bonding force are subjected to closed-loop adjustment in combination with a model prediction control algorithm, so that the welding process is evolved along a preset optimal physical path all the time. The system comprises a multi-mode sensing welding head, a synchronous data acquisition module, a state resolving module and a self-adaptive control module. The transparent and intelligent welding process is realized, and the bonding consistency, reliability and yield of high-density interconnection are remarkably improved.

An optical circuit includes one or more input waveguides, a plurality of output waveguides, and a reflector structure. At least a portion of the reflector structure forms an interface with the one or more input waveguides. The portion of the reflector structure has a smaller refractive index than the one or more input waveguides. An electrical circuit is electrically coupled to the optical circuit. The electrical circuit generates and sends different electrical signals to the reflector structure. In response to the reflector structure receiving the different electrical signals, a carrier concentration level at or near the interface or a temperature at or near the interface changes, such that incident radiation received from the one or more input waveguides is tunably reflected by the reflector structure into a targeted output waveguide of the plurality of output waveguides.

Methods, systems, and storage media for performing multi-user gaze tracking in a vehicle space using multi-surface optical reflections are disclosed. Implementations may: acquire face and eye region image data of a plurality of occupants within a field of view of at least one camera associated with a vehicle; evaluate reflected image quality thresholds; locate and match occupants within the vehicle space; and perform eye tracking for multiple occupants independently via reflected multi-view images provided to a deep learning model.

The invention relates to the field of display driving control of input equipment, in particular to an electronic ink screen display control method of a keycap, which comprises the following steps of: firstly, inserting a sensing phase in a key domain, and constructing a state vector containing charge bias estimator, optical reflectance and temperature by utilizing opposite-polarity probe pulse, phase-locked demodulation and temperature measurement; then filtering fusion and sample-based temperature-related response parameter calibration are carried out, a Prantl-Ishlinskii hysteresis model is constructed, an equivalent dose target is obtained through analysis and inversion, and a charge bias target is set to be zero; solving a constraint optimization synthesis zero direct current vector waveform under zero direct current constraint and executing, and injecting a correction phase pair with opposite polarity when a judgment condition is not met; and summarizing execution records to calculate the total equivalent charge amount of the whole board, carrying out blocking and phase staggered scheduling based on optical deviation and charge bias, and carrying out online parameter back-writing. According to the invention, ghosting and flickering are reduced and long-term stability is improved.

The invention discloses a high-precision detection and calculation method for optical reflection and mechanical deflection centers of a precise rotating mirror. According to the invention, the direction of the laser beam emitted by the laser is adjusted, the precise rotating mirror is controlled to carry out sine scanning rotation at the same time, and the corresponding transverse displacement change of the beam is calculated, so that the target incident angle of the measurement beam incident on the precise rotating mirror is determined; under a target incident angle, a laser beam emitted by a laser or a precise rotating mirror is translated, the precise rotating mirror is controlled to perform sine scanning rotation, corresponding longitudinal optical path change of an optical path is calculated, and the position of an optical reflection center of the precise rotating mirror is detected by utilizing the longitudinal optical path change of the optical path and transverse displacement change of the laser beam. And the position of the mechanical deflection center of the precise rotating mirror is detected. According to the invention, high-precision detection of the positions of the optical reflection center and the mechanical deflection center of the precise rotating mirror can be realized, and the optical path error of an optical path is effectively reduced.

The invention relates to the technical field of gas sensing and optical detection, in particular to an annular multi-pass absorption cell and a detection method thereof.The annular multi-pass absorption cell comprises a reflecting mirror, the reflecting mirror is a cylinder with the two ends open, and a reflecting film is arranged on the inner wall of the reflecting mirror to form a continuous annular optical reflecting surface; the end cover assemblies are arranged at the openings in the two ends of the reflecting mirror, and a closed gas cavity is defined by the end cover assemblies and the reflecting mirror; an incident light hole and an emergent light hole are formed in the cylinder wall of the reflecting mirror and are respectively used for guiding a detection light beam to enter and exit from the gas chamber. The cylindrical reflector with two open ends is adopted, and an annular optical reflecting surface is formed on the inner wall of the cylindrical reflector, so that complex optical paths of discrete components in a traditional absorption cell are integrated in a single structure, the innovative design remarkably improves the system integration level, effectively compresses the size, can realize a longer absorption optical path in a limited space, and improves the absorption efficiency. The sensitivity of gas detection is greatly improved.

The invention relates to the technical field of navigation system error correction, and discloses a multi-path error correction method in a Beidou navigation system, which comprises the following steps of: scanning through an environment perception sensor integrated with a navigation receiver to obtain three-dimensional space data of a surrounding environment of the navigation receiver; generating a set comprising a plurality of candidate paths according to the space reflection source model; establishing a sparse optimization model taking an observation matrix as a core through sparsity priori of a plurality of candidate path signals; solving the sparse optimization model, and identifying a real reflection path which forms dominant influence on the pseudo-range observation value; and a corrected pseudo-range observation value is obtained, and a final positioning result is calculated based on the corrected pseudo-range observation value and is fed back. According to the method, potential reflecting surfaces around a receiver are actively sensed and parameterized through an environment modeling and geometric path prediction mechanism based on three-dimensional space data, and the additional delays of all candidate reflecting paths are calculated according to the optical reflection law.

The invention discloses an anesthesia preoperative risk assessment method and system based on multi-source data fusion, and relates to the technical field of medical informationization, and the method comprises the following steps: S001, building a cross-time-scale illumination and skin state combined observation baseline, injecting a micro-amplitude polarization mark in an image collection chain, and obtaining an image collection chain; extracting a hot spot track and a boundary definition curve through frame-by-frame image analysis, and constructing a time reference point set of a reflection behavior; and S002, based on the time reference point set, executing optical reflection decomposition on the observation image sequence, separating mirror reflection and diffuse reflection components under a unified light field model, generating a double-domain characteristic spectrum of a reflection domain and a blood flow response domain, and constructing an artifact risk map. According to the method, the time reference point and the polarization mark are constructed, illumination and reflection behavior modeling and separation are achieved, anti-fact playback, causal checking and dynamic regulation are combined, artifacts are accurately removed, real blood flow features are extracted, and the accuracy and stability of preoperative risk assessment are improved.

Hybrid integrated photonic integrated circuit laser comprising a photonic integrated circuit including an elongated optical waveguide comprising an elongated gain medium waveguide, at least a first and second optical reflector, the gain medium waveguide being located or extending between the first and second optical reflectors and being located inside an optical cavity to provide optical feedback. Further comprising a pump laser diode to provide electromagnetic radiation to the gain medium waveguide. The elongated optical waveguide, and the first and second optical reflectors are monolithically integrated inside the photonic integrated circuit. The gain medium waveguide comprises a rare-earth ion implanted silicon nitride waveguide core. The pump laser diode is positioned adjacent to the at least one photonic integrated circuit and is edge coupled or facet coupled to a lateral edge or a facet of the photonic integrated circuit to provide pump radiation to the rare-earth ion implanted silicon nitride waveguide core.

An integrated-lighting-module may have a heat sink module, a LED light chip, an optical reflector, and a holder, and optionally a driver cap. The driver cap may be configured to hold a driver within the driver cap to power the LED light chip. The driver cap may attach to a top of the heat sink module. The driver may be housed within the heat sink module. The heat sink module may be finned at various locations. The holder may attach to the heat sink module with the optical reflector and the LED light chip disposed between elements of the holder and elements of the heat sink module. Trim, such as MR16 sized trim, a lamp, and / or a lens holder, may attach to a bottom flange of the holder. The integrated-lighting-module may be adjusted without interfering with the trim. The holder may function as trim in some embodiments.

The present disclosure is a light reflection measurement device including: a first light source for outputting first continuous light; a second light source for outputting second continuous light as local light; and a signal processing unit for performing digital signal processing on a light reception signal I(t) obtained by multiplexing reflected light that is obtained by irradiating a measurement target with one branched light of the first continuous light, reference light that is the other branched light of the first continuous light, and the local light, in which the signal processing unit calculates an autocorrelation function between the light reception signal I (t) and a light reception signal I (t+τ) obtained by shifting the light reception signal by time τ, and measures reflection on the measurement target by using a position of a peak of the autocorrelation function.

The application provides an underwater target recognition method and system based on 4K visible light polarization imaging, and relates to the technical field of underwater target recognition.The application uses pixel-level registration RGB and polarization four-dimensional light field tensor encoding technology to synchronously capture high-resolution spectral intensity information and polarization physical characteristics of a target, overcomes the limitation of information loss of single modal data in low-light or high-turbidity scenes, designs polar coordinate symmetry of a ring-shaped direction-sensitive convolution kernel, combines polarization degree matrix decomposition technology of the Fresnel reflection law, accurately quantifies the optical reflection characteristic difference of a material, dynamically learns the correlation weight of spatial features and polarization features based on a cross-modal attention mechanism, strengthens the joint response of target edge contours and internal textures, adopts a lightweight recognition network architecture, integrates a polarization-sensitive convolution kernel and a dynamic channel reparameterization module, realizes parallel and efficient inference of target position, category and material information, and realizes accurate recognition of underwater targets.

The invention discloses an image motion compensation device in a vacuum low-temperature environment based on a Stewart mechanism, which relates to the field of optical system motion and comprises a movable platform, six single-leg driving rods and a bottom plate. The bottom of the movable platform and the six single-leg driving rods are fixed through thrust bearing assemblies respectively. The single-leg driving rod comprises a thrust bearing assembly, an upper hooke joint assembly, a ball screw, an angular contact ball bearing assembly, a high-precision servo motor assembly, a dust cover, a pre-tightening spring and a lower hooke joint assembly. The high-precision servo motor drives the ball screw to rotate, and the angular contact ball bearing is axially supported; the six single-leg driving rods are connected and fixed to the bottom plate through the six hooke joints in a threaded mode, and each hooke joint is composed of a cross-shaped rotating shaft, a ball bearing and a hooke joint supporting base. According to the invention, six-degree-of-freedom adjustment of the optical reflector in an on-orbit vacuum low-temperature environment is realized.

The invention relates to the technical field of optical reflection cavities, and provides an optical reflection cavity, an optical multi-pass pool system and an optical resonant cavity system. According to the optical reflection cavity provided by the embodiment of the invention, the first sub-plane mirror is introduced into the plane-concave cavity; a first sub-plane mirror is arranged in an edge area of a main plane mirror in the y-axis direction and is inclined relative to the main plane mirror in the y-axis direction, and the length of the first sub-plane mirror in the x-axis direction is more than one time of the track width of a light beam on the main plane mirror in the x-axis direction; the light beam can be reflected by the first sub-plane mirror for more than one time, and the translation direction of the track is continuously changed after the light beam is reflected by the first sub-plane mirror, so that the reflection times of the light beam in a limited volume are increased, the optical path is increased, and the distribution density of reflected light spots is also increased. And more reflection times, higher optical path volume ratio and higher-density light spot distribution can be achieved.

The application discloses a method for designing and optimizing a VLCP system assisted by light reflection RIS under low signal-to-noise ratio, wherein the VLCP system comprises an intelligent wall adopting a smart surface RIS with mirror reflection, a transmitter and a user terminal equipped with a receiver with a liquid crystal smart surface, communication and positioning signals are integrated into the transmitter, the transmitter comprises an LED, and the method comprises the following steps: under low signal-to-noise ratio, taking asymptotic capacity as a communication metric constraint condition, taking a Cramer-Rao lower bound of positioning error as a positioning metric constraint condition, combining a positioning constraint satisfaction process based on a two-stage greedy algorithm and a communication performance maximization process based on a greedy strategy convex relaxation algorithm, optimizing elements of an RIS allocation matrix to maximize the asymptotic capacity, obtaining an optimal RIS allocation matrix, and completing the design and optimization of the VLCP system. In a low signal-to-noise ratio scene, the VLCP system of the application can significantly improve system performance by applying RIS.

The invention belongs to the technical field of non-ferrous metal material preparation, and particularly relates to an AlMgSi optical reflector material and a preparation method and application thereof.The AlMgSi optical reflector material comprises, by weight, 0.4%-0.7% of Si, smaller than or equal to 0.08% of Fe, 0.15%-0.30% of Cu, 0.8%-1.1% of Mg, smaller than or equal to 0.01% of Cr, smaller than or equal to 0.001% of Ti and the balance Al and inevitable impurities; the preparation method of the AlMgSi optical reflector material comprises the following steps that soaking, extrusion forming, solid solution treatment and aging treatment are sequentially conducted on an AlMgSi alloy ingot, and the AlMgSi optical reflector material is obtained; the soaking temperature ranges from 480 DEG C to 520 DEG C, and the extrusion temperature of extrusion forming ranges from 300 DEG C to 350 DEG C; the AlMgSi optical reflector material disclosed by the invention has high hardness and low surface roughness at the same time.

The application relates to the technical field of LCD liquid crystal screen processing, and discloses a curved surface display screen backlight assembly preparation device, which comprises a monitoring base plate, a rotating mechanism, an optical reflection part and a monitoring assembly which are rotationally connected to the monitoring base plate, light emitted by the monitoring assembly passes through a gap between external workpieces and is reflected by the optical reflection part to form a mapping light path, and a reciprocating cleaning mechanism which is arranged on the monitoring assembly and comprises a motion conversion assembly which is in transmission cooperation with the monitoring base plate, a cleaning execution part and a light transmission window. The optical mapping detection light path which is composed of the monitoring assembly, the optical reflection part and a mapping plate is arranged, so that the defects that the assembly and correction mode of the LCD screen and the backlight plate assembly is single, the internal gap size is not easy to dynamically control and the edge position is usually corrected only are solved.