125 results about "Continuous spectrum" patented technology

The invention discloses an ultra-high-speed imaging device based on acousto-optic filtering modulation. The ultra-high-speed imaging device comprises a spectrum modulation system, a spectrum imaging system and a data processing system. The spectrum modulation system utilizes an acousto-optic tunable filter (AOTF) to dynamically modulate broadband continuous spectrum light, narrow-band illumination light which rapidly changes along with time is generated, and time information of a dynamic scene is effectively mapped to a spectrum dimension. And the spectral imaging system images the spectral coded dynamic scene to the hyperspectral camera to realize acquisition of spectral space-time information. The data processing system performs spectral crosstalk correction, channel separation and demosaicing reconstruction on the acquired original mosaic image, and recovers a time sequence image according to a spectrum-time mapping relation, thereby realizing single-shot superspeed imaging in a dynamic process. The device has the advantages of being simple and compact in structure, flexible in time window, high in imaging fidelity and the like, and has wide application prospects in the fields of rapid dynamics such as microfluidics, laser processing and ultrafast physics.

The invention discloses a 10kV medium-voltage power distribution network power line carrier communication method and system based on adaptive OFDM (Orthogonal Frequency Division Multiplexing), and the method comprises the steps that a master station sends a detection frame to a slave station, and the slave station carries out the CE (Channel Estimation), and obtains the CSI (Channel State Information); the method comprises the following steps of: dividing a broadband channel into a plurality of parallel orthogonal subcarriers, and dynamically allocating a modulation mode, a modulation order and a forward error correction (FEC) coding rate for each subcarrier of OFDM (Orthogonal Frequency Division Multiplexing) by adopting a water injection algorithm based on channel state information (CSI); adopting two-stage automatic gain control (AGC) to condition a signal received from a power line; and carrying out dynamic frequency hopping between a frequency band with serious interference and an idle frequency band based on a continuous spectrum sensing result. Compared with the prior art, through the multi-dimensional adaptive technology, the communication system can sense the channel state in real time and dynamically adjust the communication strategy, so that a stable communication link is established in a severe power grid environment.

The invention relates to the technical field of image recognition, in particular to a red tide algae recognition method based on a hyperspectral image, and the method comprises the following steps: calculating a gradient value of each pixel in a spatial dimension and a spectral dimension according to an original hyperspectral data cube, setting a diffusion coefficient for diffusion, and obtaining a three-dimensional fidelity hyperspectral data cube. According to the method, the gradient change trends of the spatial dimension and the spectral dimension are extracted at the same time pixel by pixel, and the regional differentiation diffusion operation is matched, so that the expression ability of the alga plaque boundary and the consistency of the internal spectral characteristics are enhanced, and the fidelity of the hyperspectral data in fine-grained region identification is improved; upper convex hull calculation of a spectral reflectivity curve and construction of a continuous spectrum background baseline are introduced, and characterization of pigment absorption morphological characteristics is enhanced; and in combination with the characteristic absorption wave bands of chlorophyll and phycobiliary, the synergistic weighted response to the distribution of the algae pigment is realized, and the sensitivity and selectivity of pigment recognition are improved.

The invention relates to a spectral confocal three-dimensional shape reduction method and system based on a super-surface spectral imaging chip. The method comprises the following steps: a continuous spectrum light source device emits a continuous spectrum light beam to a dispersion objective lens, the continuous spectrum light beam is subjected to spatial separation along an optical axis direction through the dispersion objective lens and then is irradiated to the surface of a to-be-measured three-dimensional topography object, and the continuous spectrum light beam is reflected on the surface of the object; a part of the reflected light beam penetrates through a light hole of the shading plate, then irradiates a focusing lens, is focused by the focusing lens and then enters a super-surface spectral imaging chip, and the super-surface spectral imaging chip collects wavelength information; wavelength information collected by the super-surface spectral imaging chip is converted into height information, and the three-dimensional shape of the surface of the object is fitted according to the height information and the pixel position corresponding to the height information. According to the invention, the reduction of the three-dimensional morphology can be realized through one-time photographing of the simple optical system, the morphology reduction efficiency is high, and the cost is low.

The invention discloses a semiconductor etching end point detection method and a multi-channel detection system, and the detection method comprises the following steps: outputting detection light; expanding the detection light into a continuous spectrum band; imaging the continuous spectral band to a modulation surface of a digital micromirror device, and establishing a pixel group corresponding to each narrow-band wavelength of the continuous spectral band; performing spatial sampling on the continuous spectrum band, and distributing and writing a unique radio frequency modulation frequency f for each pixel group; respectively executing vibration type switch modulation on each pixel group at a radio frequency modulation frequency f so as to convert wavelength information of a continuous spectrum band into a time domain frequency optical signal; converting the time domain frequency optical signal into a time domain electric signal; performing frequency domain analysis on the time domain electric signal, and demodulating gas absorption light intensity corresponding to each modulation frequency; and judging the etching end point of the semiconductor according to the change trend of the gas absorption light intensity. According to the invention, parallel detection of a plurality of spectrum channels can be realized through a single detector so as to judge an etching end point.

The invention provides a uniform light mixing algorithm for an omni-directional light-emitting lamp. The uniform light mixing algorithm comprises the steps of obtaining a reflection spectrum of a target object, dynamically calculating a target SPD based on the data, driving a multi-channel LED to synthesize output, and achieving closed-loop control through continuous spectrum monitoring. According to the algorithm, a perception-decision-execution-feedback loop is constructed according to a visual effect of an optimization target after object-light interaction from a light-emitting surface static parameter to match the environment and requirements in real time, and the problems of color development distortion and insufficient comfort of static light mixing in a dynamic scene are solved.

The invention belongs to the technical field of thin film thickness detection, and discloses a multi-channel spectrum-based thin film thickness online detection method and system, and the method comprises the steps: irradiating a plurality of different positions of the surface of a thin film through a plurality of light beams with continuous spectrums, and collecting a multi-channel spectrum image formed by the reflected light of the surface of the thin film; each channel of the multi-channel spectral image corresponds to each irradiated position on the surface of the thin film; segmenting the multi-channel spectral image according to channels, and extracting a single-channel spectral image of each channel; calculating the film thickness of each irradiated position by using a film thickness analysis algorithm according to each single-channel spectral image; displaying a film thickness calculation result on a display interface; therefore, the accuracy and reliability of density detection are improved; therefore, synchronous online detection of multiple positions of the thin film can be realized, the detection efficiency and the spatial resolution are remarkably improved, and the accuracy and the stability of measurement can be improved.

The invention discloses a high-fidelity power pulse sound source for ship noise simulation and a control method thereof, the high-fidelity power pulse sound source comprises an electromagnetic transducer and a driving circuit thereof, the driving circuit of the electromagnetic transducer comprises an element for actively controlling the charging current of an energy storage capacitor and a bipolar Marx circuit for generating bipolar power pulses, the working modes comprise a bipolar pulse output mode and a power amplifier output mode. The invention also provides a circuit control method required by ship noise simulation. According to the high-fidelity power pulse sound source for ship noise simulation and the control method of the high-fidelity power pulse sound source, accurate injection and extraction of current in an electromagnetic transducer coil are achieved, and then the transducer is accurately controlled to output sound waves; the two working modes of bipolar pulse output and power amplifier output simulate a continuous spectrum and a line spectrum in ship noise respectively, and finally, a neural network used for generating a pulse power supply trigger signal is trained based on a cyclic gating unit, so that high-fidelity ship noise simulation is realized.

The invention discloses a method for monitoring the heat dissipation performance of a module in a salt mist environment, and belongs to the technical field of material performance monitoring, and the method comprises the steps: carrying out the continuous spectrum data collection of the heat dissipation surface of the module in the salt mist environment, obtaining original multispectral data, carrying out the background correction, generating multispectral imaging data, and recognizing an action region; analyzing the spectral response attribute of the action area, obtaining a characteristic spectral fingerprint, carrying out physical parameter inversion, obtaining heat dissipation related physical parameters, and combining heat flow distribution data during the operation of the synchronous acquisition module to establish a related mapping relationship; and carrying out quantitative evaluation on the influence degree and the degradation trend of the salt mist environment on the heat dissipation performance of the module by combining the related mapping relationship to obtain a performance evaluation report. According to the method, the technical means of combining multispectral imaging analysis and heat flow data modeling is adopted, and quantitative diagnosis and trend prediction of heat dissipation performance degradation can be achieved.

A quantum information processing system may comprise a quantum mechanical system capable of exhibiting transitions between a plurality of eigenstates; and a quantum control environment, wherein the quantum control environment eigenstates is capable of exhibiting modes from a continuous spectrum and is coupled to the quantum mechanical system at at least one coupling location, wherein said coupling is characterized with a set of parameters of the quantum mechanical system, and wherein a selected combination of the at least one coupling location and the set of parameters intentionally causes to suppress at least one of said transitions when intentionally changing a state of the quantum mechanical system by the quantum control environment.

The invention discloses a distributed passive positioning method based on spectrum whitening cross-correlation, and belongs to the technical field of underwater sound distributed passive positioning. According to the method, the problems of low time delay inequality estimation precision and low target positioning precision caused by low-frequency strong line spectrums in ship radiation noise are solved. In order to solve the problem that a low-frequency strong line spectrum in ship radiation noise affects delay inequality estimation, a signal spectrum whitening processing method is provided, and then a distributed passive positioning method based on spectrum whitening cross correlation is provided. Aiming at the non-white characteristic of a signal power spectrum caused by a ship line spectrum and a continuous spectrum trend, an alpha filter is used for carrying out average processing on the same frequency in time to obtain the average intensity of each frequency point, and then spectrum whitening processing on the power spectrum is realized through frequency domain normalization processing. The method solves a problem that the low-frequency strong line spectrum enables the correlation function to generate multiple peaks, thereby affecting the time delay estimation precision, and improves the precision of subsequent target positioning. The method can be applied to distributed passive positioning.

The invention discloses a light source system capable of continuously adjusting an attenuation ratio, and belongs to the technical field of optical radiation measurement and photoelectric detection. In order to solve the problems of wavelength dependence, discontinuous adjustment, spectrum distortion and the like existing in an existing light intensity adjusting scheme, a combined structure of an integrating sphere and a diaphragm cylinder is adopted, and the device comprises a light source, the integrating sphere with the high-reflection inner wall, a front-end adjustable diaphragm, the diaphragm cylinder with the extinction inner wall and a rear-end adjustable diaphragm. Continuous attenuation of output light intensity in a predetermined dynamic range is realized by adjusting the apertures of the front and rear diaphragms, the lower limit of attenuation ratio meets the requirement, and the dynamic range can reach more than three orders of magnitude. The system uses the integrating sphere to form a stable Lambert light source, the attenuation process depends on geometric parameters, spectral distribution and spatial uniformity basically remain unchanged, and the non-uniformity of a light-emitting surface is not greater than 5%. The invention further provides a calibration method, high-precision attenuation prediction is achieved through detector measurement and view factor model fitting, and the calibration method is suitable for weak cursor calibration, detector linearity testing and other applications.

The invention relates to the field of digital cultural heritage processing and man-machine interaction, and discloses a farming and nomadism digital symbol interactive experience system, which comprises an attribute propagation module used for calculating an organizational form attribute value representing a continuous pedigree state of a symbol between a farming ordered system and a nomadism free system; the correlation calculation module is used for constructing a correlation graph containing a time sequence evolution relationship based on the attribute value; the manifold evolution engine is used for constructing a mixed potential energy field formed by superposition of grid adsorption potential energy and free interaction potential energy, and adjusting sign stress parameters and motion trails according to attribute values; and the adaptive rendering module is used for generating a symbol form and visual feedback according to the attribute value and the association weight. According to the method, logic attributes are mapped into physical potential energy field weights and rendering parameters, so that continuous dynamic expression and visual interaction of historical symbols from a grid structure to a manifold structure are realized.

The invention discloses a spectral analysis-based PCB chemical preparation ratio intelligent adjustment method and system, and relates to the technical field of industrial data processing. The method comprises the following steps: monitoring a cleaning solution flowing through a PCB cleaning tank in real time to obtain continuous spectrum time sequence data; analyzing in real time to obtain a copper ion concentration value sequence and a corrosion inhibitor concentration value sequence, and calculating a copper ion concentration change rate and a corrosion inhibitor concentration change rate in real time; analyzing the real-time change trend of the copper ion concentration value and the corrosion inhibitor concentration value, and analyzing the real-time numerical relationship between the copper ion concentration change rate and the corrosion inhibitor concentration change rate; judging whether a harmful side reaction which mainly consumes the corrosion inhibitor occurs or not; and when the harmful side reaction is judged to occur, inputting the copper ion concentration change rate and the corrosion inhibitor concentration change rate into a pre-trained proportioning optimization model, and outputting to obtain an acid agent adjustment amount and a corrosion inhibitor adjustment amount. According to the invention, the precise, real-time and intelligent adjustment of the proportion of the PCB chemical agent is realized.

The invention relates to a device (56) for on-the-fly measurement of the absorption spectrum (σ(λ1)) in the visible light range of at least one wall (16) of preforms (12), comprising: - means (36) for conveying preforms (12), - a measurement light source (58) which emits a measurement light beam (55) according to a continuous measurement spectrum (σm), - a spectrometer (62) measuring the intensity (I) and the wavelength (λ1) of the first light beam (55) after having passed through the preform (12), characterised in that the measurement light source (58) comprises at least two primary light sources (58A, 58B, 58C, 58D) which each emit a primary light beam according to an associated continuous spectrum (σA, σB, σC, σD), the primary continuous spectra (σA, σB, σC, σD) of the primary sources (58A, 58B, 58C, 58D) being different.

The invention discloses a spectrum super-resolution method and system based on an FP cavity and deep learning, and the method comprises the steps: S1, carrying out the initialization of spectrum collection, and selecting light with a specific wavelength after the light is acted with a target detection object; s2, performing photoelectric conversion and digitization to generate low-resolution original discrete spectrum data of corresponding wavelengths; s3, continuous spectrum scanning is carried out, and original discrete spectrum data collection of the whole target wave band is completed; and S4, performing super-resolution spectrum reconstruction, and judging whether cyclic reconstruction is performed or not based on a reconstruction data quality evaluation result until the quality is qualified. According to the method, an accurate mapping model from a low-resolution spectrum to a high-resolution spectrum is established through a pre-trained deep neural network, and an original spectrum which is collected by an FP cavity and is limited by the theoretical limit optical resolution of the FP cavity can be reconstructed into a super-resolution spectrum of which the resolution remarkably exceeds the theoretical limit. The problem that the resolution of an FP cavity in a long-wave region is sharply reduced is effectively solved, and the full-wave-band uniform high resolution is realized.

The invention relates to an ultraviolet analyzer for detecting sports diet finished products, which is characterized in that a lower liquid level table and an upper liquid level table are arranged on a base unit, and a to-be-detected fluid sample forms a liquid bridge between the lower liquid level table and the upper liquid level table; the surface energy anchoring structure is used for forcibly limiting a solid-liquid contact line of a to-be-detected fluid sample in a preset optical path light passing area; the liquid bridge impedance feedback loop is used for forming a closed loop through a liquid bridge in the liquid bridge stretching process so as to monitor the equivalent complex impedance value of the liquid bridge in real time; in the process that the driving unit drives the lifting detection head to stretch the liquid bridge, the stretching speed of the driving unit is adjusted in real time according to the complex impedance change rate fed back by the impedance analysis module; and the optical fiber spectrum detection unit is triggered to carry out spectrum acquisition at a plurality of different stretching heights when the liquid bridge maintains a continuous state. According to the invention, high-precision detection can be realized without physical dilution, and continuous spectrum data under a group of optical program columns can be obtained through single sample loading.

The application discloses an infrared spectrum mixed gas identification method and an identification device. The identification method comprises the following steps: sending a regulation and control instruction to a regulation and control component according to a regulation and control strategy, so that an infrared narrow-band filter generates multiple detection light beams with different center wavelengths, which are incident into a detection component; obtaining detection information obtained by detecting values corresponding to the detection component and each detection light beam, and judging whether it is a mixed gas type through a judgment rule; if yes, performing multi-component analysis on the detection information to obtain component analysis information; and obtaining key detection parameters from the detection information according to the component analysis information, and performing analysis to obtain a corresponding gas identification result. The identification method can realize continuous spectrum scanning in a certain waveband range by controlling the regulation and control component to adjust the infrared narrow-band filter to generate detection light beams with different center wavelengths, can perform multi-component analysis and obtain a gas identification result, and can realize reliable analysis on a mixed gas with multiple gas components and accurate acquisition of the concentration values of each gas.

The invention relates to the technical field of X-ray optics and spectral analysis, in particular to a multi-objective optimization design method and system for an X-ray fluorescence spectrum monochromator, and the main points of the technical scheme are as follows: S1, parameter and database input, S2, source spectrum generation and calibration, S3, monochromator dynamics solution, S4, multi-scheme comprehensive scoring and optimization selection, and S5, XRF forward modeling and system-level indexes. According to the method, an X-ray tube source parameter library is established to synthesize a real source spectrum containing a continuous spectrum and a characteristic line, an optimal design scheme is automatically searched in a multi-parameter space through a normalized weighted scoring system, and finally a simulated full spectrum is generated and system-level performance indexes are evaluated through an end-to-end'source-monochromatization-sample-detector 'forward modeling link. The problems that in a traditional design method, parameter coupling is complex, and model prediction deviation is large are solved, collaborative optimization of energy resolution, flux and purity is achieved, and technical support is provided for developing a high-performance XRF spectrograph.

This invention provides an intelligent spectrum allocation method and system for adaptive signal-to-noise ratio (SNR) in C+L band optical networks, relating to the field of optical fiber communication technology. The method includes: initializing the C+L band elastic optical network and determining nodes, links, spectrum slots, and time slot resources; receiving service requests and clarifying the source node, destination node, time slot requirements, and capacity; calculating link weights based on transmission distance and spectrum occupancy, and selecting the optimal path; determining the modulation format based on path distance and calculating the required spectrum slots; allocating higher-order modulation to the C band and lower-order modulation to the L band; ensuring continuous spectrum slots and consistent links, otherwise the request fails; selecting the spectrum block with the highest OSNR for allocation, comparing the OSNR with a threshold, and determining whether the request is successful. This invention improves the transmission quality of service requests and enables more comprehensive and accurate resource allocation.

The invention relates to the technical field of inertial confinement fusion measurement, in particular to a full-view-field full-spectrum response efficiency calibration method of a KB microscope, which comprises the following steps: acquiring a system response efficiency measured value of a microscope to be calibrated at at least one selected position in an object space view field under at least one discrete energy point; a system response efficiency theoretical model of the microscope to be calibrated is constructed, the theoretical model characterizes the system response efficiency as a function changing along with the object view field position and the incident X-ray wavelength, and the theoretical model comprises at least one correction parameter used for characterizing the deviation between an actual system and an ideal model; comparing and fitting the actual measurement value of the system response efficiency with the calculation result of the theoretical model under the corresponding same condition to correct the correction parameter to obtain a corrected theoretical model; and determining the system response efficiency of the microscope to be calibrated in the whole object view field and the continuous spectral range by using the corrected theoretical model.

The invention discloses a dispersion objective lens with a numerical aperture of 0.75. The dispersion objective lens comprises a triplet lens, three doublet lenses and three single lenses which are coaxially arranged, and after a continuous spectrum point light source passes through the dispersion objective lens, light with different wavelengths realizes differential convergence on an optical axis; a dispersion curve is fitted through a quadratic function, a small amount of dispersion linearity is sacrificed, better balance of an axial dispersion range and imaging quality is realized, and double targets of large dispersion range and high-quality imaging are achieved. The device has the advantage of long object distance, is convenient for front-end light path adjustment, and can be flexibly applied to various measurement systems.

The invention discloses an underwater target identification method and device and a storage medium, and relates to the technical field of audio data processing. The method comprises the following steps: forming a hydrophone target audio random matrix according to audio data of a target audio signal; determining a residual component in the target audio random matrix of the hydrophone; constructing a continuous spectrum binary structure model based on the residual components; determining a theoretical spectrum and an estimated spectrum according to the continuous spectrum binary structure model; determining an optimal line spectrum characteristic parameter and an optimal continuous spectrum characteristic parameter according to the theoretical spectrum and the estimated spectrum; determining characteristic value statistical parameters according to the optimal line spectrum characteristic parameters; obtaining a structured feature vector through the optimal continuous spectrum feature parameter and the feature value statistical parameter; and underwater target identification is carried out through the structured feature vector and the Mel spectrogram of the target audio signal. According to the method, the recognition accuracy of the underwater target can be improved by effectively extracting the continuous spectrum features of the underwater acoustic signal.

The application provides a cultural relic hyperspectral image reconstruction method and device, a hyperspectral area array camera and a medium, relates to the technical field of hyperspectral imaging and cultural relic digital protection, and collects the RGB image of the surface of the cultural relic under the illumination of uniform and continuous spectrum; a plurality of sampling points are selected in the RGB image, and the hyperspectral data at the plurality of sampling points is collected; the spatial registration of the RGB image and the hyperspectral data is carried out, and the corresponding relationship between the pixel coordinates and the spectral coordinates is established; the spatial information of the RGB image and the hyperspectral data are fused according to the corresponding relationship between the pixel coordinates and the spectral coordinates; the fusion result is combined with the prior constraint of the preset cultural relic pigment standard spectral database to reconstruct the complete hyperspectral image of the surface of the cultural relic, complete hyperspectral area array images are quickly generated under the condition of a small amount of sampling, have the advantages of lightweight equipment, efficient collection and reliable results, and can be widely applied to cultural relic protection scenes such as murals, calligraphy and painting, ceramics and textiles.

This invention discloses a novel self-oscillating optical frequency comb generator, an OEO loop A, used in conjunction with a continuous spectrum laser and a photoelectric oscillator to generate an optical frequency comb; a signal separation component, connected to the OEO loop A via a 1x15 optical demultiplexer A, used to generate real and imaginary signals; a transmission channel, connected to the signal separation component via a 1x15 optical demultiplexer B, used for signal transmission; and a decoding component, connected to the transmission channel, used to recover the real and imaginary signals and perform decoding processing. The OEO loop A includes a single-mode fiber A, a PIN photodetector, an electrical amplifier A, and a bandpass Bessel filter. This invention demonstrates strong and clear constellation diagrams for receiving signals in a 300Gbps 116-QAM transmission and reception channel over uncompensated fiber optic links of standard single-mode fiber (80km to 240km), exhibiting high applicability in coherent optical communication.

This invention discloses a converging optical path for a solar spectroradiometer and its coaxial adjustment method, relating to the field of atmospheric measurement devices. The converging optical path includes a tracking optical tube and a measuring optical tube. The tracking optical tube consists of a pinhole, an adjustment mechanism, a four-quadrant detector, and an amplification and acquisition circuit. The measuring optical tube consists of a window, an aperture diaphragm, an off-axis parabolic mirror, a field-of-view diaphragm, a stray beam diaphragm, a meniscus lens, a neutral density filter, and a spectrometer. The method constructs a normalized evaluation index by acquiring a weighted integral sum of continuous spectral intensity from four quadrant signals and multiple preset reference bands (2–6 micrometers). A local five-point cross scan is performed centered on the current lock point to determine the optimal coaxial point and obtain target locking characteristics. Coaxial adjustment is triggered again upon power-on or when the evaluation index decreases. This invention improves the consistency between the measuring and tracking optical paths and the stability of direct-light measurements.

The application discloses a method for preparing a spectrum continuously adjustable perovskite-polymer composite film by femtosecond laser direct writing and application. The method comprises the following steps: preparing a perovskite precursor solution and coating to form a uniform wet film, and performing heating annealing under an inert atmosphere to obtain a perovskite precursor composite film; a femtosecond laser is used to perform focusing scanning in a line scanning mode, a spatial overlap is controlled to form a continuous and uniform heat field by adjacent pulses, perovskite nanocrystal growth is induced, and a perovskite-polymer composite film with continuously adjustable emission spectrum is obtained. Based on the quantum size effect of a single halogen system or the ion exchange mechanism of a mixed halogen system, the application realizes, for the first time, sub-nanometer precision continuous spectrum tuning in a visible light band in the composite film, and can directly write a high-resolution 2D or 3D light-emitting pattern in the film, thereby fundamentally eliminating spectrum crosstalk caused by a heterojunction, and providing a new technical platform for full-color display, information encryption and flexible optoelectronic devices.

The present application relates to a wide-spectrum continuous picosecond pulse laser source and a laser generation method, comprising a controller and a seed laser diode, a plurality of amplification stages and a photonic crystal fiber connected in sequence, the controller being connected with the seed laser diode and the plurality of amplification stages; wherein the controller stores a plurality of editable repetition frequency parameters of the seed laser diode, amplification parameters of the amplification stages corresponding to each repetition frequency, and a switching strategy of different repetition frequencies, for selecting the repetition frequency of the seed laser diode as needed and outputting a repeatable continuous spectrum. The present application can generate picosecond light pulses in an ultra-wide continuous spectrum range of 400 nm to 2100 nm, the output spectrum has the spatial characteristics and high brightness of laser, and at the same time provides the bandwidth characteristics of incandescent lamps or fluorescent lamps. Through the setting of the present application, a repeatable output spectrum can be generated at all repetition frequencies, there is zero loss in output power, and no light pulse is lost during output.

The invention belongs to the technical field of motor noise reduction control, and particularly relates to a method and system for suppressing vibration noise of a position sensorless control motor. Comprising the following steps: selecting one of a first frequency pulsating voltage signal and a second frequency pulsating voltage signal as a random frequency pulsating voltage signal by adopting a random determination mode; injecting a random frequency pulsating voltage signal under the control of a position sensor, and obtaining a corresponding current response signal; demodulating the current response signal to obtain rotor position information; wherein the matched frequencies of the first frequency pulsating voltage signal and the second frequency pulsating voltage signal are selected, so that a discrete spectrum in a response current PSD frequency spectrum is expanded into a continuous spectrum, and an electromagnetic force wave newly generated by the random frequency pulsating voltage signal is far away from the intrinsic mode frequency of the motor as far as possible. Discrete spectrums of vibration noise caused by injection of random-frequency high-frequency signals are eliminated, and electromagnetic vibration and noise of the motor are effectively reduced.

Embodiments of the present application provide a kind of MR equipment color correction method and related device, it is related to mixed reality technical field, the method comprises: obtaining target image to be displayed;Obtain the frequency domain data related to light source environment of the target image;In the case where it is determined that discrete spectral light source environment and continuous spectral light source environment exist in the target image according to the frequency domain data, the target image is regionally segmented, and discrete spectral light source region, continuous spectral light source region and transition region are obtained;The image corresponding to each region is respectively sampled to carry out color correction on the color correction model of preset;Display the target image after color correction.The target image is segmented, and different color correction parameters are used for correction for the different light source environment images segmented, effectively solve the color consistency problem of MR equipment under complex light source environment, provide more immersive and natural mixed reality experience for user.