61 results about "Dual wavelength" patented technology

The application relates to a dual-wavelength silicon-based PIN photoelectric sensor with ultralow dark current and high responsivity, which comprises a silicon substrate, a central P + anode region, high resistance / intrinsic silicon absorption region, bottom N + cathode region, junction termination extension region JTE, guard ring GRL, surface passivation layer and electrode structure. Through accurate regulation of the junction edge electric field, the application effectively suppresses the leakage current and early breakdown phenomenon caused by the high edge electric field in the plane PIN structure, realizes sub-nanoampere dark current output, and simultaneously, through synergistic optimization of the intrinsic region thickness and the doping distribution, the sensor obtains higher light responsivity at two typical wavelengths of 660 nm and 940 nm, and meets the requirements of short-wave shallow absorption and long-wave deep absorption.

This invention proposes a non-contact in-vehicle alcohol screening device and system. It includes a transmitting module, a receiving module, a main control and power module, a housing, and a light-shielding structure. The alcohol screening device is connected to a remote management platform. The device also includes a communication module for sending test results, test time, and device identification information to the remote management platform. The transmitting module uses dual Class 1 low-power lasers, combined with real-time current monitoring and a self-locking switch in the main control module, providing triple protection for human safety through light source, circuitry, and mechanical operation. This ensures that even direct laser light into the eyes is harmless, meeting the safety and compliance requirements of law enforcement scenarios. The receiving module is equipped with a bandpass filter with a corresponding center frequency to effectively suppress ambient stray light and circuit noise. Simultaneously, the dual-wavelength differential design, through the ratio calculated by the main control module, jointly cancels common interferences such as water vapor and window reflections, significantly improving the reliability of the screening signal in complex environments.

This invention discloses a wavelength-tunable dual-cavity ultrafast fiber laser based on rotating optical fibers and its control method, relating to the field of laser technology. The dual-cavity ultrafast fiber laser of this invention integrates a wavelength division multiplexer within a dual-ring resonant cavity, structurally integrating two wavelength channels, each containing an independent gain fiber, to achieve dual-color soliton output and reduce gain competition. By setting an adjustable rotating fiber filter, consisting of a polarization controller, rotating optical fibers, and a polarization-dependent isolator, in the multiplexing section, the center wavelength of both wavelengths is tunable. Simultaneously, the two sub-cavities share the same saturable absorber to achieve passive synchronous mode-locking, and a delay line is introduced into one of the channels to adjust the equivalent cavity length, achieving repetition frequency matching and timing alignment between the two sub-cavities, thereby obtaining stable, tunable, and synchronous dual-wavelength ultrashort pulse output.

The application provides a full-layer turbulence inversion method based on spectrum fusion of a laser radar and a millimeter wave radar, wherein observation data of equipment in a same observation area are acquired; then, cloud micro-physical phase state recognition is performed, and liquid cloud areas, ice crystal / snow areas, rainfall areas and supercooled water areas are divided; the particle falling speed is set as zero in the supercooled water area as a strong physical priori; a dual-wavelength speed consistency criterion is introduced, the speed responses of the laser radar and the millimeter wave radar are compared at a same height layer, and an anchor point mode, a deviation correction mode or a model rollback mode is dynamically switched, so that the physical coupling of air vertical movement and particle sedimentation movement is realized; on this basis, the second-order structure function method is applied to invert the full-layer turbulence dissipation rate based on the decoupled air vertical speed time sequence. The application can invert the real full-height-layer turbulence dissipation rate, and is suitable for all-weather, full-height-layer and especially high-precision wind field and turbulence monitoring under complex cloud and precipitation conditions.

The application provides a method for realizing color continuous gradient transition by using DLP light curing 3D printing, and belongs to the technical field of additive manufacturing. The steps comprise: providing a dual-wavelength DLP light curing printing device, adjusting a printing focal plane, segmenting and slicing a three-dimensional digital model, setting dual-wavelength exposure parameters, preparing a photosensitive resin slurry containing components such as pH responsive dyes and photoacid generators, completing layer-by-layer printing through reciprocating dynamic switching of visible light curing forming and ultraviolet light color regulation, and obtaining a target workpiece after post-processing. The method realizes high-resolution, continuous gradient integrated forming of multi-color materials through single-light-machine dual-wavelength (365nm ultraviolet light and 460nm visible light) ultra-high-speed dynamic switching combined with a specific formula of photosensitive resin slurry.

This application discloses a laser protective plate and its preparation method. The provided laser protective plate includes a substrate layer and a reflective layer disposed on at least one side of the substrate layer; wherein, the substrate layer contains a substrate and a composite absorber and a silane coupling agent modified heat dissipation agent uniformly dispersed in the substrate; the reflective layer contains a distributed Bragg reflective film formed by alternating deposition of high-refractive-index materials and low-refractive-index materials. The provided laser protective plate, through a photothermal low-temperature synergistic design, achieves an OD value greater than or equal to 8 at both 532nm and 1064nm wavelengths on a plastic substrate, with a visible light transmittance ≥50%; the plate shows no perforation under continuous irradiation with a 1kW-level laser for 60 seconds. It can be widely used in industrial, medical, and military fields.

The application relates to the technical field of gas spectrum detection, and discloses a CO2 gas concentration dual-wavelength detection system and method based on TDLAS-WMS, which comprises a main control upper computer, a signal generation and modulation module, a dual-channel laser module, an optical path module, a gas absorption cell, a photoelectric detection module and a signal acquisition and lock-in amplification module. The method comprises the following steps: initializing and loading parameters; generating a driving signal of superimposed scanning and modulation to drive a laser; extracting a second harmonic signal after the laser passes through the gas to be detected; realizing high signal-to-noise ratio concentration signal acquisition, automatically judging whether the current waveband is saturated or under-response, switching to another waveband, and realizing self-adaptive dynamic detection. Through dual-wavelength cooperation and self-adaptive switching, the technical problems of narrow dynamic range, easy saturation at high concentration, insufficient sensitivity at low concentration, and large error of a single-wavelength TDLAS system are solved, and wide-range, high-precision and continuous self-adaptive detection from low concentration to high concentration are realized.

The application discloses a kind of based on bimodal resonance's photoacoustic-scattering aerosol dual-wavelength synchronous detection system and method, belong to photoelectric detection technical field, in the system, dual-wavelength light source modulation module generates two different frequency modulated laser, respectively from two ends into double-difference bulb pipe coupling photoacoustic-scattering combined gas cell;The gas cell includes the two ends of two acoustical tubes arranged in parallel and each is connected with an integrating sphere, form H type coupling structure;Scattering signal collection module, photoacoustic signal acquisition and processing module respectively acquire two-channel scattering photon counting data in two integrating spheres, sound wave signal in two acoustical tubes and two integrating spheres;Digital lock-in signal processing module based on FPGA outputs modulation signal to light source, and receives sound wave signal in two acoustical tubes and two integrating spheres to carry out full-digital demodulation and processing.The application effectively solves the problem of time-space asynchronization and sampling cumulative error caused by time-sharing multiplexing or multiple machine parallel connection.

The application discloses a PON distributed intelligent computing task scheduling method and belongs to the technical field of optical access network communication technology. The application obtains the link attenuation coefficients of each optical network unit through an optical line terminal and broadcasts; the allocation information of a differential double-wavelength channel and a gradient vector is established and broadcasted; a differential double-wavelength mapping is used to allocate target optical power to gradient components, and each unit is instructed to transmit after compensation in combination with the attenuation coefficients; optical signals are received on the differential double-wavelength channel and are converted into photoelectric current, and a global gradient vector is constructed after dark current is eliminated; the maximum value of the net photoelectric current difference value is counted to adaptively update the mapping coefficients and broadcast, and the global model parameters are updated and issued to each unit to complete synchronization. The application solves the problems of communication bottlenecks in the existing gradient aggregation and a large dynamic range of optical signal power.

The utility model relates to a kind of tunnel construction dust detection devices including sampling gas path, dust detector based on light signal and signal transmitter;Sampling gas path, including air inlet pipeline, optical observation cavity and air outlet pipeline;Dust detector, including the light source of setting at the optical observation cavity of sampling gas path, light path and sampling gas path are orthogonal;Area array photoelectric detector is connected with transmitter electric signal;Signal transmitter, including radio frequency antenna, for the signal of area array photoelectric detector received is sent to the receiving end of collected data.The tunnel construction dust detection device provided by the utility model realizes the real-time dust detection of anti-interference by sealing, independent sampling gas path and independent, isolated light signal path relative to sampling gas path.Optimized scheme, detection laser is shaped into narrow light spot, adopts double-wavelength detection, cooperates with impact type pre-separator, realizes the dust detection resolution improvement of different dimensions such as detection time, detection granularity.

This invention discloses a dual-wavelength optical signal receiving method for a 50G ONU optical device, relating to the field of optical communication technology. The method involves sequentially arranging a 0-degree filter, a tilt filter, and a reflection filter in the receiving optical path of an optical receiving module. The received optical signal is processed sequentially by these filters to obtain optical signals with wavelengths in the ranges of 1342±2nm and 1366±2nm, which then enter the optical receiving module. This invention replaces the existing receiving optical path that uses a combination of a 45-degree filter and a 0-degree dual-bandpass filter by employing a 37-degree reflection filter, an 8-degree tilt filter, and a horizontally arranged 0-degree filter to form a dual-wavelength optical signal receiving optical path. This solves the problem of high production costs associated with the use of 0-degree dual-bandpass filters in existing single-transmitter dual-receiver 50G ONU optical devices.

The application discloses a kind of dual-wavelength ultraviolet light synergistic ozone micro-nano bubble treatment methyl orange wastewater method, belong to wastewater treatment technical field.The method is first to the micro-nano bubble generator is carried out organic solvent ultrasonic cleaning, deionized water flushing and drying pretreatment, then preparation ozone micro-nano bubble water, finally under the condition of stirring ozone micro-nano bubble water is mixed with methyl orange solution, through UV-222 and UV-254 dual-wavelength ultraviolet lamp irradiation realizes methyl orange degradation.The application combines the synergistic effect of ozone micro-nano bubble and dual-wavelength ultraviolet light, strengthens hydroxyl radical generation and organic matter photolysis, improves methyl orange decolorization and mineralization efficiency, can also photolyze debromination to avoid bromate byproduct, whole process does not need to add reagent, no sludge is generated, equipment system is simple and easy to control, applicable to the treatment of methyl orange azo dye wastewater, with good engineering application value.

1. Name of the product in this design: Spectrometer (Dual Wavelength, Fully Automatic). 2. Purpose of this design: For the differentiation and quantitative measurement of inorganic and organic materials. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D view of the assembled state.

This invention discloses a FA-ICG-NBs nanobubble, its preparation method, and its application in the preparation of tumor-targeted therapeutic agents. The FA-ICG-NBs nanobubble employs a composite phospholipid shell, with folic acid (FA) covalently bonded to the surface and indocyanine green (ICG) loaded onto it, encapsulating a mixture of oxygen and sulfur hexafluoride. The preparation method includes: preparing a lipid solution for forming the composite phospholipid shell; mixing the lipid solution with the oxygen and sulfur hexafluoride mixture, and then performing a reciprocating shearing gas-liquid interface self-assembly to obtain the FA-ICG-NBs nanobubble. The FA-ICG-NBs nanobubble prepared by this invention utilizes dual-wavelength photoacoustic imaging for non-invasive assessment of tumor blood oxygenation and hypoxia improvement, combined with ICG fluorescence timing for screening the optimal therapeutic window, and synergistic oxygen-enhanced sonodynamic therapy. It exhibits good biocompatibility, structural stability, and integrates targeted enrichment, blood oxygenation assessment, hypoxia monitoring, timing regulation, and enhanced therapeutic effects.

A kind of spaceborne laser radar multi-functional narrow-band filtering optical system and method, comprising: 1064nm channel and 532nm channel, with the function of the narrow-band filtering of 1064nm and 532nm dual-wavelength channel laser scattering echo, meet the needs of different wavelength laser common receiving optical system and APD detector, compact structure, high integration;With the function of testing the parallelism and transmittance of the whole machine transceiver of different wavelength channels without disassembling any assembled and adjusted component, the testing method is simple, suitable for whole machine testing;With the ability to cancel any wavelength channel arbitrarily, while keeping the auxiliary testing function of another channel unchanged, strong engineering applicability.

The present application relates to the technical field of water quality detection, in particular to a boiler water quality hardness on-line detector and method based on Lambert-Beer law, which comprises an equipment shell box, an optical module, a fluid control module, a self-cleaning module, a compensation algorithm unit, a data transmission unit, a touch control screen and a warning unit; the optical module comprises an LED light source and an optical probe, the LED light source is used for providing light required for detection, and the optical probe is used for receiving light and collecting absorbance signals. In the boiler water quality hardness on-line detector and method based on Lambert-Beer law, the dual-wavelength anti-interference design eliminates error sources: the optical module adopts a combination of a 520±5nm main wavelength and a 700±10nm reference wavelength, and cooperates with the compensation algorithm unit to calculate and correct the absorbance, so that the interference caused by suspended solids and bubbles in the boiler water sample can be accurately deducted.

The present application relates to the technical field of photoacoustic imaging, and discloses a nerve block plane precision determination method based on multi-modal physiological signal fusion, comprising the following steps: attaching a plurality of piezoelectric diaphragms to a to-be-measured region; placing a ring-shaped transducer array in the to-be-measured region; synchronously emitting modulated ultrasonic micro-vibration waves and double-wavelength short pulse laser to jointly excite the tissue by sound and light; collecting original photoacoustic signals and ultrasonic reflection signals through the ring-shaped transducer array; pre-processing the collected signals to obtain instantaneous phases; calculating local phase shifts based on a phase-locked photoacoustic tomographic reconstruction algorithm and inversely obtaining a three-dimensional elastic modulus distribution; extracting a nerve block plane boundary according to the three-dimensional elastic modulus distribution and outputting a visual result. By directly inversing the phase shift of the modulated ultrasonic micro-vibration waves into the three-dimensional elastic modulus distribution of the tissue, and combining the phase-locked photoacoustic tomographic reconstruction algorithm, the present application realizes objective nerve block plane determination without the subjective cooperation of the patient.

Systems and methods for 3D image scanners for real-time dynamic 3D surface imaging are disclosed. Embodiments of the present systems and methods describe a system and method comprising a first and / or second camera, and a projector, and a processor, the projector projects structured light with a fringe pattern onto a 3D object, the processor is configured to extract a phase map and a texture image from the image, and the processor calculates depth information from the phase map. Embodiments further describe methods and systems to determine wrapped phase from the image using a Hilbert transform, and to generate absolute phase from the wrapped phase using a combination of a quality-guided path following algorithm, a two-wavelength phase unwrapping algorithm, or a Markov Random Field method, and to generate a phase map from the absolute phase to determine depth information of the 3D object. Algorithms using conformal mapping, optimal transport mapping, and Tschupmueller mapping are used to register and track captured 3D geometry surfaces.

The application discloses a microwave electric field measuring probe device and a use method thereof. The device comprises an atomic vapor chamber, a double-wavelength spectrometer prism connected to the end of the atomic vapor chamber, an input coupling light fiber collimation assembly and an output signal light fiber collimation assembly connected to the end of the double-wavelength spectrometer prism away from the atomic vapor chamber, an input probe light fiber assembly connected to the atomic vapor chamber, the input probe light fiber assembly connected to the end of the atomic vapor chamber away from the double-wavelength spectrometer prism, the input probe light fiber assembly, the output signal light fiber collimation assembly and the atomic vapor chamber arranged on the same axial line, probe light capable of passing through the double-wavelength spectrometer prism into the output signal light fiber collimation assembly, and coupling light entering the atomic vapor chamber capable of coinciding with the probe light capable of passing through the double-wavelength spectrometer prism in the atomic vapor chamber. The purpose of improving light collection efficiency and use flexibility is achieved.

The application discloses an embedded light wave-electromagnetic wave coupling detection head and a hydraulic parameter measurement method thereof, and belongs to the technical field of engineering safety monitoring. The detection head is of a point type structure, comprising a packaging shell, a photosensitive sensing core and an electromagnetic excitation sensing core. The packaging shell is made of high-strength corrosion-resistant non-metallic material, and a sensing window is arranged at the front end. The photosensitive sensing core realizes stress and temperature separation detection through a series connection of double-wavelength fiber Bragg gratings. The electromagnetic excitation sensing core emits high-frequency electromagnetic waves through a micro electromagnetic coil or an interdigital electrode array. The measurement method comprises photoelectric signal synchronous acquisition, double decoupling compensation based on a temperature reference, water content and stress parameter inversion and coupling state research and judgment. The application realizes high-precision monitoring of water and force parameters at the same point, solves the problems of single parameter and high false alarm rate of traditional technologies, and is suitable for safety monitoring and hierarchical early warning of high-risk nodes of underground pipelines.

The embodiment of the present disclosure provides a weather radar reflectivity factor calibration method based on clear air echo, comprising: obtaining reflectivity factor data obtained by standard weather radar and to-be-measured weather radar for synchronous observation on the same clear air area; wherein the standard weather radar is a normal performance weather radar, and works at a first wavelength; the to-be-measured weather radar is a weather radar with questionable performance, and works at a second wavelength; clear air echo reflectivity factor data is selected from the reflectivity factor data, and the measured dual-wavelength ratio is calculated therefrom; the theoretical dual-wavelength ratio is calculated according to the first wavelength and the second wavelength; if the measured dual-wavelength ratio and the theoretical dual-wavelength ratio are not equal, then the reflectivity factor data observed by the to-be-measured weather radar is calibrated according to the deviation between the measured dual-wavelength ratio and the theoretical dual-wavelength ratio. In this way, remote and automatic weather radar reflectivity factor calibration can be realized based on clear air echo, without the need for additional personnel to go to the operation.

This invention relates to the fields of nanomaterial applications and biomedical imaging technology, specifically to near-infrared absorbing gold nanoclusters, their preparation, and their application in photoacoustic microscopy. The near-infrared absorbing gold nanoclusters include Au. 60 NCs and Au 42 NCs, Au 60 The absorption peak of NCs is at 1090 nm, Au 42 Both NCs and Au exhibit strong absorption in the near-infrared region of 700–1700 nm, low absorption at 532 nm, and are water-soluble. 60 NCs and Au 42 NCs can be applied to photoacoustic microscopy, Au 60 NCs are excited using a dual-wavelength method at 532 nm / 1064 nm, with Au 42 NCs were excited using a dual-wavelength method at 532 nm / 808 nm; the Au 60 NCs and Au 42 NCs can be used in photoacoustic microscopy for high-resolution three-dimensional visualization and quantitative analysis of kidney microstructure.

This invention discloses an on-chip integrated optical waveguide and graphene dual-wavelength velocimetry device, velocimetry method, and manufacturing method. The wavelength velocimetry device includes a silicon wafer substrate, a lower cladding layer disposed on the silicon wafer substrate, a waveguide core layer disposed on the lower cladding layer, and an upper cladding layer disposed on the waveguide core layer. The waveguide core layer includes an input / output waveguide, an optical beamsplitter, and an interferometer arm. A metal reflective layer is disposed at the end of the interferometer arm, which includes a sensing arm and a reference arm. The sensing arm and the reference arm are symmetrically arranged, and the surface of the sensing arm is covered with graphene. The output end of the input / output waveguide is connected to the input end of the optical beamsplitter, and the two output ends of the optical beamsplitter are respectively connected to the reference arm and the sensing arm of the interferometer arm.

An illuminator comprising a body defining an illumination axis; a first light source and a second light source; a movable optical element movable between a first position in which light from the first light source is directed along the illumination axis, and a second position in which light from the second light source is directed along the illumination axis; and wherein the first and second light sources are different colors, and wherein the movable optical element is a mirror rotatable on a rotation axis perpendicular to the illumination axis and wherein each of the first and second light sources directs light toward the movable optical element along a respective light path perpendicular to the illumination axis.

The application discloses a single / dual-wavelength switching method and device based on an inherent Lyot type liquid crystal filter structure, and specifically relates to the following: (1) single-wavelength transmission mode: the phase retardation of all cascaded liquid crystal boxes is controlled to meet the single-wavelength filtering requirement, all the multiple liquid crystal boxes are in the effective working state, and the single-wavelength narrowband transmission is realized. (2) dual-wavelength transmission mode: the maximum driving voltage is applied to the first and second cascaded liquid crystal boxes, the phase retardation of the first and second cascaded liquid crystal boxes is reduced to 0, only the remaining cascaded liquid crystal boxes at the rear are kept in the effective working state, and the dual-wavelength transmission is realized. The application effectively solves the limitation that independent filtering structures need to be designed for single-wavelength and dual-wavelength applications in the prior art, the inherent structure does not need to be changed, and only voltage regulation is needed to 'activate' the corresponding cascaded liquid crystal layer, so that the flexible switching of the working mode is realized.

This invention relates to the field of laser precision welding technology, specifically to a dual-wavelength beam spot flexible adjustment composite welding system and method. The system includes a ring welding laser source, an adjustable ring beam shaping and deflection device, a spot scanning laser source, a pre-compensation beam expanding and shaping system, and a dichroic mirror. The ring welding laser source emits a first fundamental mode laser beam; the spot scanning laser source emits a second fundamental mode laser beam; the two beams are coaxially combined by the dichroic mirror and focused onto the target working surface. This invention achieves multi-dimensional and multi-condition flexible adjustment of the ring beam spot and precise welding control through the adjustable ring beam shaping and deflection device. The auxiliary optical path is responsible for high-precision spot scanning welding. Utilizing the characteristics of real ring beam generation and coaxial collaboration of the two optical paths, it solves the problems of arc initiation and termination defects, scanning haloing, and distortion in traditional ring welding, overcomes the shortcomings of complex beam spot adjustment in existing laser welding, and improves welding quality and processing flexibility. It is particularly suitable for precision welding of new energy lithium battery components.

This invention relates to the field of all-solid-state laser technology, specifically providing a master-slave pulse delay-controllable ultraviolet dual-wavelength dual-pulse laser, comprising: a pump source and a V-shaped folded resonator. The V-shaped folded resonator includes an input mirror, a gain medium, a Q-switched crystal, a total reflection mirror, a frequency doubling crystal, and an output mirror. The Q-switched crystal performs step modulation via a dual-step electrical signal. Within one modulation cycle, the dual-step electrical signal sequentially includes a high-voltage phase, a low-voltage phase, and a de-voltage phase. Within one pump cycle, it sequentially generates transitions from the high-voltage phase to the low-voltage phase and from the low-voltage phase to the de-voltage phase, respectively outputting a dual-wavelength master pulse and a dual-wavelength slave pulse. Furthermore, the delay between the dual-wavelength master pulses can be controlled by adjusting the duration of the low-voltage phase. This invention achieves ultraviolet dual-wavelength dual-pulse output with flexible and controllable master-slave pulse delay.

A kind of optical fiber pulse laser radar system for measuring atmospheric water vapor concentration profile, comprising multi-wavelength optical fiber laser emission module and data acquisition and processing module, three different wavelength pulses are generated by using first, second online seed laser and offline seed laser in multi-wavelength optical fiber laser emission module, two online wavelengths are respectively locked to water vapor absorption peak center by seed light frequency stabilization module, after being alternately output by optical switch, energy amplification is carried out by distributed Bragg reflection type fiber amplification module and emitted to atmosphere, first online wavelength and offline wavelength are combined to detect high layer water vapor concentration in troposphere by data acquisition and processing module, second online wavelength and offline wavelength are combined to detect low layer water vapor concentration in troposphere, and water vapor concentration profile is obtained by inversion.The present application adopts double-wavelength pair adaptive layered detection strategy, combines all-fiber DBR resonant cavity structure, and realizes high-precision, high-spatial and temporal resolution, all-day water vapor concentration profile measurement.