541 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.

According to various embodiments, a tunable optical metasurface includes an array of elongate resonator tracks arranged parallel to each other. The liquid crystal is located within the light field between adjacent resonator tracks. The controller may selectively apply a voltage differential mode to the elongated resonator track to adjust its phase response. In accordance with various embodiments, a cross-backplane reflector is utilized that allows for either an intermediate array routing or an edge array routing of electrical connections between the controller and resonator tracks. The cross-backplane reflector includes a plurality of elongate optical reflectors extending parallel to each other and perpendicular to the resonator track array. An optically transmissive (e.g., transparent) dielectric may electrically separate the resonator track from the optical reflector. A via pattern formed therein facilitates an electrical connection between the optical reflector and the resonator track.

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.

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.

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.

A camera-based optokinetic motor device (OMR) for assessing visual acuity in rodents, consisting of: a. a two-chamber structure consisting of: ◯ an outer rotating chamber with an inner surface of alternating black and white vertical stripes, designed to produce an optokinetic visual stimulus; ◯ an inner static chamber, which is transparent and centrally positioned within the outer chamber and configured to accommodate the test object, wherein the inner chamber contains a centrally arranged, non-rotating platform for placing the rodent; b. a motorized rotation mechanism, comprising: ◯ a stepper motor that is operationally coupled to the outer chamber to enable controlled rotation at a fixed and adjustable speed; ◯ a switch-controlled rotation direction system that enables bidirectional movement, allowing both clockwise (CW) and counterclockwise (CCW) rotation at a predefined speed of 10 revolutions per minute (rpm); c. a high-resolution imaging system, consisting of: ◯ a high-resolution (HD) camera positioned at an optimal height above the device to capture the rodent's movement response in real time; ◯ a motion tracking module, either software-based or hardware-integrated, to analyze and quantify the subject's spatial frequency threshold (SFT) in response to the moving stimulus; d. a closed test environment, consisting of: ◯ a non-transparent housing surrounding the dual-chamber structure, forming a closed box configuration approximately 45 cm long and wide and 30 cm high to minimize interference and distractions from external light; ◯ an internal white LED lighting system on the inner wall of the housing, which ensures uniform lighting conditions and thus guarantees the clarity of the recorded visual data; e. a data acquisition and processing module configured to: ◯ Record the video data received from the HD camera; ◯ Processing and analyzing rodent movement patterns using the rotating stimulus to determine the optokinetic reflex (OKR) and visual acuity response; ◯ Save and export the collected data for later statistical analysis.

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 a quantum cascade laser with a cylindrical waveguide and a preparation method thereof, and belongs to the field of photoelectron, the quantum cascade laser comprises a laminated structure, the laminated structure is provided with two waveguide grooves, a ridge waveguide is formed between the two waveguide grooves, the waveguide grooves are hyperbolic, and the ridge waveguide is cylindrical; the bottom and side wall areas of the waveguide groove are subjected to mechanochemical grinding treatment and filled with InP: Fe, then mechanochemical grinding is carried out again, and then an insulating film layer material is evaporated; due to the unique cylindrical shape of the ridge waveguide, the photon density can be effectively improved, and the output characteristic of laser is optimized; and meanwhile, the mode distribution of light can be better controlled, and excellent laser characteristics are realized by utilizing optical reflection and interference effects. According to the invention, before secondary epitaxy, a mechanochemical grinding method is adopted to carry out surface treatment on the double channels, so that waveguide loss after secondary epitaxy of InP: Fe can be effectively reduced, the threshold current density is further reduced, and the output power and the slope efficiency are increased.

A photovoltaic device includes a substrate, a semiconductor stack and a transparent tunnel junction. The semiconductor stack includes an n-type layer selected from a first transparent conductive oxide layer, or a window layer, or both; and a p-type absorber layer disposed on the n-type layer, wherein the absorber layer consists essentially of CdSexTe(1-x), wherein x is from 1 to about 40 at. %. The transparent tunnel junction comprises a transparent interface layer of CdyZn(1-y)Te doped to be p+type, and a transparent contact layer doped to be n+type, and the interface layer is disposed between the p-type absorber layer and the transparent contact layer. In bifacial embodiments, the tunnel junction forms a transparent back contact and electrode; and in multi-junction embodiments, the tunnel junction forms a diode-like connector between top and bottom cells. The transparent contact layer may comprise tin oxide or zinc oxide doped with aluminum, fluorine or indium. The photovoltaic device may also include an electron reflector layer and / or an optical reflector layer.

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 discloses a galvanometer motor linearity and symmetry detection device and method, the device comprises an optical platform provided with a detection station, and the detection station comprises a machine base fixed on the optical platform; the fixed seat is arranged on one side of the machine base; the laser is arranged on the fixed seat; the first optical reflecting mirror is positioned in a receivable range of the first laser beam; the second optical reflecting mirror is positioned in a receivable range of the second laser beam reflected by the first optical reflecting mirror; the first diaphragm is embedded in the machine base; the second diaphragm is embedded in the fixed seat, and a third laser beam reflected by the second optical reflector can penetrate through the second diaphragm; a galvanometer piece of the galvanometer motor is located in a receivable range of a fourth laser beam emitted by the second diaphragm; and the light spot acquisition device is positioned in a receivable range of the fifth laser beam reflected by the galvanometer. The device is simple in structure, low in cost and small in occupied space; operation is simple, verification is convenient, and the performance quality of the galvanometer motor can be rapidly detected.

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 discloses a high-temperature-resistant endoscope. The high-temperature-resistant endoscope comprises an inner tube, an outer tube and a camera shooting assembly. An endoscopic cavity is formed in the inner tube, an observation window is arranged at one axial end part of the inner tube, and an optical lens is fixed on the observation window; the camera shooting assembly comprises a camera, and the camera is arranged in the endoscopic cavity and located on the side, provided with the observation window, of the inner tube. The outer pipe is arranged on the periphery of the inner pipe in a sleeving mode, the inner pipe is detachably connected with the outer pipe, the outer pipe is provided with a cooling cavity used for containing cooling liquid, and the cooling cavity is arranged around the peripheral side of the inner pipe. The camera capable of imaging is directly placed in the endoscopic cavity, so that the process of optically reflecting an image by a lens is omitted, an imaging light path is greatly shortened, and the imaging quality is effectively improved. The liquid cooling structure is arranged on the peripheral side of the endoscopic cavity, the temperature of the endoscopic cavity can be reduced, the heat resistance of the camera in the endoscopic cavity is improved, and normal work of the camera is guaranteed.

In some examples, optical fiber identification and distance measurement may include utilizing a reflectometer and optical fiber connection device that includes a Rayleigh wavelength pass filter to pass, in one direction, an optical reflectometer signal to an optical fiber. The reflectometer and optical fiber connection device may include a Raman wavelength pass filter to filter out, in another direction, Rayleigh backscattering from the optical reflectometer signal. Further, the Raman wavelength pass filter may pass, in the another direction, a Raman Anti-Stokes signal from the optical fiber.

The invention relates to the technical field of optical reflective films, and discloses a coated reflective film containing white light quantum dot coated organic particles and a preparation method thereof, and the coated reflective film comprises a white reflective base film and a coating coated on the surface of the white reflective base film; the raw materials in the coating comprise white light quantum dot coated organic particles, an adhesive and an auxiliary agent; in the organic particles coated with the white light quantum dots, the white light quantum dots are ZnCuGaInS / ZnS quantum dots subjected to surface ligand exchange through molecules containing sulfydryl functional groups, and the particle size of the organic particles is 3-50 microns. According to the coating reflective film, the white light quantum dots are adopted in the coating to wrap the organic particles to serve as the coating particles, and due to the fact that the coating contains the organic flexible particles, the coating reflective film has the good anti-adsorption effect; in addition, as the surfaces of the coating particles are coated with white light quantum dots, the material can spontaneously generate white light emission under the excitation of a backlight source, and the brightness of the coating reflecting film is greatly increased.

The invention provides a low-stress large-aperture reflector supporting structure and method, and relates to the technical field of optical reflector supporting, the supporting structure comprises a reflector, a reflector substrate, a cylindrical bonding hole, a flexible lining and a flexible supporting structure, the cylindrical bonding hole and the flexible lining corresponding to the cylindrical bonding hole are designed, and the flexible supporting structure is formed. A cylindrical surface-cylindrical surface matched connection mode is adopted for the bonding interface of the reflecting mirror and the flexible lining, a traditional conical surface-conical surface matched connection mode is replaced, the cylindrical bonding holes can effectively avoid the processes of running-in and turning of the conical surface, the machining cost and the development time are greatly saved, and the production efficiency is improved. The technical problems that an existing traditional reflecting mirror back three-point supporting mode is complex in working procedure, high in machining cost and time cost, incapable of eliminating bonding stress and poor in self heat dissipation effect are solved.