895 results about "Light excitation" patented technology

The invention relates to the technical field of power equipment state monitoring, in particular to an oil-immersed transformer distributed temperature measurement method based on a fluorescent optical fiber sensor, and the method comprises the steps: arranging the fluorescent optical fiber sensor in a key temperature rise region in a transformer in a partitioned and layered three-dimensional topological structure, and forming a distributed temperature measurement network; exciting light is injected through a pulse laser to excite a fluorescence signal; a dual-channel phase-locked amplification technology is used to collect signals, and a dual-weight adaptive attenuation model and an oil flow coupling compensation function are combined to demodulate the temperature; reconstructing a dynamic temperature field based on a three-dimensional thermodynamic inversion algorithm, and marking high-gradient hot spots; and temperature, load current and oil flow velocity data are fused to realize graded alarm. According to the invention, the limitation of traditional single-point monitoring is broken through, the strong electromagnetic interference resistance is excellent, a global temperature field can be accurately reconstructed, dynamic early warning is realized, and the operation safety and the operation and maintenance efficiency of the transformer are remarkably improved.

The invention relates to the technical field of industrial wastewater deep purification, and discloses an industrial wastewater deep purification system based on nano catalytic membrane separation, which comprises a pretreatment module, a catalytic degradation module, a membrane separation module, an intelligent control module and a regeneration maintenance module which are sequentially connected according to a treatment flow, the pretreatment module adjusts the water quality of inlet water to a range suitable for subsequent treatment through pH adjustment and suspended matter interception, that is, the pH is 2-11, and the turbidity is less than or equal to 50NTU; the catalytic degradation module is used for decomposing organic pollutants and mineralizing refractory substances under the excitation of ultraviolet / visible light by utilizing the photocatalytic characteristic of a nano catalytic membrane. The TiO2 / WO3 heterojunction nano catalytic membrane is adopted, so that deep oxidation of refractory pollutants such as phenol and sulfonamide antibiotics is realized, finally, the COD removal rate of 98.7% is achieved, and compared with a traditional photocatalytic process, the energy consumption is reduced by 54%.

The invention provides a preparation method of rare earth ion heavily-doped luminescent glass and application of a light source. The rare earth ion heavily-doped luminescent glass comprises the following components in percentage by mass: 50-68% of black talcum powder, 10-25% of LiF, 10-25% of NaF, 10-25% of CaF2, an externally-doped rare earth compound accounting for 15-25% of the total mass of other raw materials (black talcum powder + LiF + NaF + CaF2), and an externally-doped clarifying agent accounting for 0.5-2% of the total mass of other raw materials (black talcum powder + LiF + NaF + CaF2). The preparation raw materials of the luminescent glass are easy to obtain and low in price, the process is simple, and industrial production is easy; the emission peak of the obtained rare earth doped luminescent glass under the excitation of purple light / ultraviolet light is 450-750 nm, the internal quantum efficiency is greater than or equal to 85%, and the luminous intensity at 150 DEG C is more than 85% of the luminous intensity at room temperature. A light source packaged by the prepared luminescent glass has the characteristics of warm white light output, low color temperature (CCTlt, 4500K), high color rendering index (CRIGt, 90) and high lumen efficiency (LEgt, 851m / W).

The invention relates to a red fluorescent material excited by blue light, an LED device and fluorescent ceramic. The chemical formula of the red fluorescent material is La (2-x) MgNbO6.5: xEu < 3 + >, wherein x is more than or equal to 0.01 and less than or equal to 0.1. The preparation method comprises the following steps: weighing lanthanum oxide, magnesium oxide, niobium oxide and europium oxide raw materials according to a stoichiometric ratio, grinding and uniformly mixing; sintering the uniformly mixed powder in a muffle furnace at high temperature, and cooling to room temperature to obtain the red fluorescent material. Compared with the prior art, the novel oxide-based red fluorescent powder prepared by the invention can emit positive red light of which the central wavelength is 616nm under the excitation of 465nm blue light, and can be used for white light LED (Light Emitting Diode) luminescent devices and fluorescent ceramics.

The invention discloses a light-emitting super-structure surface capable of realizing incoherent fluorescence holography and multi-dimensional super-structure display and a preparation method thereof. The light-emitting super-structure surface is mainly composed of an optical waveguide structure layer, a micro-nano structure layer and a fluorescence emission layer. The optical waveguide structure layer comprises a substrate and a waveguide layer and is responsible for guiding fluorescence propagation; the micro-nano structure layer is located above the waveguide layer, is composed of nano bricks and can regulate and control light; the fluorescence emission layer is arranged above the micro-nano structure layer, contains quantum dots and is excited by the pump light to emit fluorescence. The metasurface can regulate and control the emergent angle, wavefront and emergent intensity of fluorescent light and pump light, the time-space coherence of the fluorescent light is enhanced through the waveguide layer, and phase modulation is carried out by using a method based on a circuitous phase. Based on the super-structure surface, through the steps of fluorescence excitation, coherence enhancement, phase modulation, diffraction calculation, hologram generation, multi-dimensional display and the like, incoherent fluorescence hologram and multi-dimensional super-structure display can be achieved, and the functions of fluorescence nanometer printing and multi-channel holographic display are covered.

The present invention combines a fluorescence sensor with an array to provide a fluorescence sensing array detection platform and a detection method for multiple plasticizers. The fluorescence sensing array detection platform includes a B-doped graphene quantum dot solution using N,N-dimethylformamide as a solvent and a B-GQDs solution using cyclohexane as a solvent; the fluorescence intensity of the B-GQDs solution with DMF as the solvent at the fluorescence characteristic peak obtained under ultraviolet light excitation at a wavelength of 350 nm, and the fluorescence data at 391 nm, 413 nm, and 434 nm are used as array points 1, 2, and 3; the fluorescence intensity of the B-GQDs solution with CH as the solvent at the fluorescence characteristic peak obtained under ultraviolet light excitation at a wavelength of 350 nm, and the fluorescence data at 386 nm, 408 nm, and 430 nm are used as array points 4, 5, and 6; thus, a 3×2 fluorescence sensor array is constructed. The detection method using the fluorescence sensor array of the present invention has simple steps, and has satisfactory specificity, reproducibility, stability and practicability, and has application potential.

The present invention includes methods for reducing photoexcitation of a photoswitchable photoinitiator in volumetric printing including a volume of a photohardenable composition at locations in the volume at which intersection of two wavelengths does not occur; methods of three-dimensional (3D) printing including dual-wavelength photoexcitation of a photohardenable composition included in a volume, the method including photoexcitation by a modified or controllably-sized light sheet including a first wavelength and an optical projection including a second wavelength; and methods for extending the reuse-printing lifetime of a photohardenable composition including a photoswitchable photoinitiator. Preferably the photohardenable composition includes the dual-wavelength photoinitiator and a photohardenable resin component. The present invention also includes a photohardenable composition including a photoswitchable photoinitiator with an improved reuse-printing lifetime.

The invention discloses a femtosecond pulse laser modulation-based GaN-based micro light-emitting diode test system, which comprises a femtosecond pulse laser excitation module, a first detection light path, a to-be-tested GaN-based micro light-emitting diode, a photovoltage detection and bias control module, a photoluminescence detection module and a control module, the control module is configured to control the excitation power and the external bias voltage of the femtosecond pulse laser excitation module, and synchronously collect a photoluminescence spectrum signal and a photovoltage signal; according to the excitation power, the external bias voltage, the photoluminescence spectrum signal and the photovoltage signal, the competition relation between carrier drift extraction and local radiation recombination under different bias electric field conditions is obtained, and therefore an experimental basis is provided for structural design and working bias optimization of the GaN-based micro light-emitting diode device to be tested.

The invention relates to a radiation contamination simulation detection equipment control method based on an ultraviolet fluorescence signal, which is applied to radiation contamination simulation detection equipment, and the equipment comprises a detection probe. The method comprises the steps that a fluorescence intensity original signal and an ambient light interference signal of a target area are collected, the distance between a detection probe and a target surface is obtained, a fluorescence simulation agent is sprayed on the target area and irradiated by an ultraviolet LED lamp, and the simulation agent is used for emitting fluorescence with the wavelength larger than 450 nm under excitation of ultraviolet light; based on the distance and the ambient light interference signal, performing coupling compensation on the fluorescence intensity original signal; and calculating a radiation simulation value according to the calibration fluorescence intensity signal, and outputting information such as the radiation simulation value, the safety level and the component type. According to the method, through non-radiation simulation agent replacement, signal calibration and multi-dimensional analysis technical means, the safety of radiation detection training is improved, the health threat of a real radioactive source to trainees is eliminated, and the accuracy and the information amount of a detection result are remarkably improved.

The invention discloses novel dual-emission dissimilar metal MOFs, the chemical formula of which is [Eu2 (na) 6 (CH3OH) 2 (Cu4I4)], and na-is a nicotinic acid radical ion. The MOFs have two secondary structural units: a cubic alkane [Cu4I4] cluster and a 1D inorganic-organic chain [Eu (na) 3] n, each [Cu4I4] cluster serves as a four-connection node, and the 1D [Eu (na) 3] n chain is connected through a nitrogen atom of a na-ligand, so that a three-dimensional skeleton structure is expanded. Tests show that at room temperature, when the compound is excited by 338 nm ultraviolet light, the compound shows two emission centers, a wide emission peak at 557 nm belongs to cluster center triplet emission of a [Cu4I4] cluster, and emission of sharp peaks at 591, 611 and 701 nm corresponds to characteristic emission of Eu < 3 + >. Particularly, the intensity ratio of two fluorescence emission peaks of the compound at 567 nm and 610 nm in the temperature range of 125-300 K and the temperature have a good linear relation, the compound is a sensitive ratio type fluorescence temperature sensing material, and a new thought is provided for application of the ratio type fluorescence temperature sensing material.

The invention discloses a wide-temperature-range perovskite optical storage material and a preparation method and application thereof, the chemical general formula of the wide-temperature-range perovskite optical storage material is CsCdCl3: xSb < 3 + >, yMn < + >, Mn < + > is Zr < 4 + >, Sn < 2 + >, Hf < 4 + > or Gd < 3 + >, x is more than 0 and less than 0.06, and y is more than 0 and less than 0.02. The perovskite crystal can generate free carriers under excitation of X-rays or 365-nanometer ultraviolet light, the carriers can be stored in a crystal defect trap, and the storage temperature of the carriers covers an ultra-wide temperature range from 100 K to 350 K, so that wide-temperature-range X-ray imaging, information storage and anti-counterfeiting application can be realized.

The invention belongs to the technical field of fluorescence spectrum collection, and particularly relates to a quasi-three-dimensional fluorescence spectrum collection method and spectrograph based on a software phase locking technology, and the method comprises the following steps: respectively modulating coprime modulation frequencies of a plurality of laser light sources with different wavelengths, and synchronously exciting the laser light sources to the surface of a sample; a fluorescence signal generated on the surface of the sample is received and processed by a linear array CCD detector to obtain a multi-wavelength spectral signal simultaneously containing background light, scattered light and fluorescence components; inputting the multi-wavelength spectral signal into a software phase-locked amplification system, introducing a Costas ring to the software phase-locked amplification system for real-time tracking and correction, and generating a synchronous reference signal consistent with the laser modulation frequency; inputting the synchronous reference signal into a software lock-in amplifier, and extracting a plurality of pure fluorescence spectrum components excited by specific-frequency laser; and synthesizing the plurality of pure fluorescence spectrum components to finally form a quasi-three-dimensional fluorescence spectrum.

The utility model relates to a micro-fluidic flow cytometry fluorescence detector which comprises an excitation light source optical fiber, a light beam shaping module, a focusing and fluorescence collecting module and a micro-fluidic chip which are sequentially arranged along the excitation light path direction of the excitation light source optical fiber, and a multi-channel silicon photomultiplier tube is arranged above the micro-fluidic chip. A plurality of groups of detection channels for receiving fluorescence signals of different wave bands are arranged in the multichannel silicon photomultiplier tube at intervals up and down, and a dichroscope, a band-pass filter and a lens group are sequentially arranged in each group of detection channel along a light path and are gathered on a receiving chip; the micro-fluidic flow cytometry fluorescence detector can efficiently and accurately complete multi-wavelength fluorescence excitation and signal collection, and is suitable for multi-channel and multi-wavelength fluorescence detection requirements in a micro-fluidic chip.

The invention discloses a preparation method of supramolecular aggregation-induced emission self-repairing waterborne polyurethane, which comprises the following steps of: polymerizing isocyanate serving as a hard segment and polytetramethylene glycol serving as a soft segment under the action of a catalyst to obtain a prepolymer, adding a molecular ligand into the prepolymer, and reacting to obtain the supramolecular aggregation-induced emission self-repairing waterborne polyurethane. And carrying out a stirring induced reaction to obtain the waterborne polyurethane with both luminescence property and self-repairing function. The preparation method is simple, the process is easy to control, the prepared waterborne polyurethane has excellent mechanical properties, the tensile strength reaches up to 72.6 MPa, and the elongation at break is 689.6%; under excitation of ultraviolet light of 260-400 nm, the material can emit blue fluorescence, and shows reversible optical response under external stimulation of acid, alkali and the like. In addition, after the material is repaired for 24 hours under the condition of 60 DEG C, the repair rate reaches 100%, and excellent self-repair capability is shown.

The invention discloses a distributed fluorescent optical fiber temperature acquisition method for an excitation system, and the method comprises the steps: constructing a distributed fluorescent optical fiber sensing network for a silicon controlled rectifier device in the excitation system, and enabling a fluorescent optical fiber to be attached to the surfaces of an SCR device and a matched radiator; an adaptive excitation light source is adopted to inject excitation light into the fluorescence optical fiber, and the excitation optical fiber generates a fluorescence signal related to the temperature; receiving the fluorescence signal through a signal acquisition and demodulation module, and combining a specific temperature measurement algorithm and a positioning technology; the fluorescent optical fiber and the signal acquisition and demodulation module adopt an anti-electromagnetic interference packaging structure to shield interference signals in a complex electromagnetic environment; the upper computer is used for receiving the demodulated temperature data, temperature field reconstruction and real-time display of the SCR device are completed, and early warning is triggered when the temperature is abnormal. High precision, anti-electromagnetic interference, low cost and easy installation can be realized, and the temperature distribution of the device can be fully covered.

The present application relates to a light-initiated chemiluminescence detection apparatus and detection method. The detection apparatus comprises: a sample feeding module; a reagent module; a pipetting mechanism comprising a first driving assembly and a pipettor, wherein the pipettor can be driven by the first driving assembly to move in a three-dimensional space and can be connected to disposable pipette tips, so as to transfer a sample and a first reagent; a cup grasping mechanism comprising a second driving assembly and a cup grasping assembly, wherein the cup grasping assembly can be used for grasping reaction cups, and is driven by the second driving assembly to perform positional dispatching on the grasped reaction cups; an incubation mechanism, which comprises a rotary disk configured to circumferentially load a plurality of reaction cups, and incubates sample-reagent mixtures in the reaction cups; a detection mechanism, which is arranged on the incubation mechanism and is configured to perform light initiation and detection on the incubated sample-reagent mixtures; and a liquid-filling assembly, which completes at a specific position the filling of a second reagent into the reaction cups. The solution provided in the present application can omit a washing procedure in chemiluminescence analysis and detection, thereby improving the detection efficiency.

A current sensor for detecting an electrical current in a line (LTG) comprises means for optical excitation and fluorescence analysis of non-magnetic centers (NV) or paramagnetic centers (NV) in isotropic sensor elements (SE1, SE2). Pump radiation (LB) with a specific wavelength and intensity is used to generate fluorescent radiation (FL), the intensity and time delay of which are measured relative to the pump radiation. The current sensor generates a magnetic field through the current flow, which floods the non-magnetic centers (NV) with different magnetic flux densities (B1, B2). The current value (ILTG) is determined from the detected fluorescence intensities and delays. A computing module (CTR) enables the evaluation, storage, transmission, or output of the data.

The invention discloses a multi-information synchronous measurement device and method for a whole space, and belongs to the technical field of spectral measurement and analysis. The device comprises a double-pulse laser excitation module, a multi-angle spectrum acquisition module, a transient imaging module, a backlight shadow imaging module and a synchronous control module. The measurement method comprises the steps of sample positioning pretreatment, double-pulse plasma excitation, multi-angle spectrum synchronous acquisition, plasma transient imaging, shock wave backlight shadow imaging, detection post-treatment and the like, and synchronous acquisition of multi-dimensional data is realized through accurate time sequence control. Omnibearing synchronous measurement of plasma spectrum, form and shock wave propagation is realized, and the device has the advantages of high data time consistency, comprehensive information acquisition, high measurement precision and high experiment efficiency, can be widely applied to the fields of material analysis, environment monitoring, plasma physical research and the like, and has wide application prospect. And the method has good adaptability in LIBS (Laser-induced Breakdown Spectroscopy) technology expansion scenes such as double pulses and magnetic confinement.

The invention relates to a purple light-excited cyan light-emitting fluorescent material as well as a preparation method and application thereof. The cyan light emitting fluorescent material is a Ce < 3 + > doped oxide cyan light emitting fluorescent material, the chemical expression of the cyan light emitting fluorescent material is SrCa0. 7Mg0. 3Lu4-xO8: xCe < 3 + >, and x is more than or equal to 0.003 and less than or equal to 0.05. The preparation method comprises the following steps: weighing a strontium source compound, a calcium source compound, a magnesium source compound, a lutetium source compound and a cerium source compound according to a stoichiometric ratio of a chemical expression of the green light emitting fluorescent material, grinding and uniformly mixing to obtain a mixture; sintering the mixture at high temperature, and cooling to obtain the purple light excited cyan fluorescent material. Compared with the prior art, the method has the advantages of optimizing the crystal field environment, constructing a cyan fluorescent material with wide-spectrum excitation characteristic, high luminous efficiency and excellent thermal stability and the like.

A self-supervised multimodal structured illumination microscopic reconstruction method comprises: exciting a biological sample with structured illumination to obtain J raw fluorescence image sequences, wherein J is an integer greater than or equal to 1, each raw fluorescence image sequence comprises S fluorescence images, S being an integer greater than or equal to 2; generating a training set for each raw fluorescence image sequence among the J raw fluorescence image sequences; training a denoising neural network on the basis of the training set; and performing super-resolution reconstruction on the S fluorescence images in each of the J raw fluorescence image sequences using a standard structured illumination super-resolution reconstruction algorithm to form a super-resolution image, which is input into the denoising neural network to obtain a final super-resolution reconstructed image.

The invention discloses a multi-modal AI material quantitative and qualitative rapid detection method, which comprises the following steps: acquiring multi-modal data through a double-pulse laser excitation system, carrying out time-space alignment, and cooperatively exciting light and heavy element characteristic plasmas by using femtosecond laser and nanosecond laser; spectral decoupling and dynamic compensation are carried out based on physical rule embedding, spectral signals are separated, and interference is suppressed; a light-heavy element dual-channel deep learning model is constructed, and multi-modal data is fused, so that feature extraction and prediction capabilities are improved; and a double-source mutual verification optimization model is adopted, so that the result reliability is ensured. According to the method, the limitation of single-mode detection is overcome, multi-component high-precision real-time synchronous detection of coal is realized, the adaptability of the model to complex coal quality and environmental change is improved, and an effective and accurate solution is provided for online monitoring of coal quality of a coal-fired power plant.

This invention discloses a method for detecting polycyclic aromatic hydrocarbons (PAHs) based on ultraviolet fluorescence and absorption spectroscopy, comprising: Step 1, acquiring the ultraviolet absorption spectrum and the fluorescence emission spectrum of a water sample under ultraviolet light excitation; Step 2, analyzing the corresponding CDOM fluorescence spectrum using the ultraviolet absorption spectrum obtained in Step 1; Step 3, subtracting the CDOM fluorescence spectrum obtained in Step 2 from the fluorescence emission spectrum obtained in Step 1 to obtain a mixed fluorescence spectrum containing multiple PAHs; Step 4, performing multivariate fitting on the mixed fluorescence spectrum obtained in Step 3 to obtain the type and concentration of each PAH in the water sample. This invention also provides a PAH detection device. The method provided by this invention is simple to operate and can directly detect raw water samples, thereby obtaining more accurate PAH detection results.

The invention discloses a photo-thermal modulation differential microscopic imaging method based on double excitation light excitation, and relates to a photo-thermal modulation differential microscopic imaging method. The invention aims to solve the problem that the existing photo-thermal microscopic imaging technology is limited by the diffraction limit and cannot break through the minimum resolution limit. The method comprises the following steps: step 1, determining a sample piece to be detected, and placing the sample piece in a photo-thermal modulation differential microscopic imaging system; step 2, starting a photo-thermal modulation differential microscopic imaging system; 3, starting an exciting light laser power supply, a probe light laser power supply and a refrigerator; step 4, setting detection parameters in photo-thermal modulation differential microscopic imaging system software in the computer; 5, gold nanoparticles are selected as imaging objects, and multiple times of detection are carried out; step 6, adopting a multi-arm carbon nanotube as a sample, and carrying out multiple times of detection; and 7, closing the equipment after the experiment is finished for 5 minutes. The invention belongs to the technical field of photo-thermal science and detection signal processing.

This invention discloses a near-infrared long-afterglow nanocomposite, its preparation, and its application in uric acid detection, belonging to the technical field of testing or analyzing materials by measuring their chemical or physical properties. The nanocomposite comprises a near-infrared long-afterglow luminescent center and an outer layer of organosilicon-doped mesoporous silicon containing tetrasulfide bonds. Under near-infrared light excitation, this nanocomposite exhibits excellent afterglow luminescence enhancement response to hydrogen peroxide. Since the product of uric acid decomposition by uricase is hydrogen peroxide, this composite enables highly sensitive and rapid detection of uric acid in blood. The composite provided by this invention has uniform particle size and high stability, effectively eliminating autofluorescence interference from biological components and improving detection accuracy.

The invention belongs to the technical field of gas sensors, and discloses a portable ratio fluorescent film sensor for visual detection of oxygen as well as a preparation method and application of the portable ratio fluorescent film sensor. According to the sensor, polymethyl methacrylate is used as a base material, a carbon dot emitting blue light is used as a fluorescent indicator, protoporphyrin emitting red light is used as a fluorescent reference agent, and the two materials are physically blended to form a blue-red dual-emission system; under the excitation of 365nm ultraviolet light, the oxygen concentration affects the yield of active oxygen, the active oxygen quenches the fluorescence of the carbon dots, the fluorescence of protoporphyrin is stable, and the sensor gradually changes from blue violet to red. Meanwhile, the invention discloses an oxygen quantitative / semi-quantitative detection method of the sensor. The preparation process is simple, the cost is low, the detection operation is simple and convenient, the anti-interference performance is strong, the high-sensitivity visual portable detection of the oxygen concentration can be realized, and the sensor is suitable for the fields of food packaging, medical monitoring, industrial safety and the like, and has the potential of large-scale production and commercial application.

The camera system mirror (100) comprises a substrate (101), a mirror layer (102), a fluorescent layer (103) and an excitation window layer (104). The substrate (101) is arranged at a position opposite to the objective lens of the infrared camera, allowing visible light and infrared light to pass through. The mirror layer (102) is arranged on the main surface of the substrate (101) on the side opposite to the infrared camera, reflecting visible light and allowing infrared light to pass through. The fluorescent layer (103) is arranged on at least a portion of the surface of the mirror layer (102), and emits at least infrared light by receiving a predetermined excitation light. The excitation window layer (104) is arranged in a manner covering the fluorescent layer (103), allowing the excitation light to pass through and at least reflecting infrared light.

The invention relates to a method for realizing transient absorption full polarization state measurement based on Stokes parameters. The method is suitable for accurately representing detection light absorption polarization state change caused by pump light excitation. According to the method, a femtosecond pulse generation module is used for generating a pump light and probe light pulse sequence, and the pump light and probe light pulse sequence is modulated by a femtosecond pulse modulation module and then used for exciting a sample and detecting signal changes. The polarization state of the detection light signal is changed through the Stokes parameter modulation module, and finally the detection light signal is collected by the time resolution signal acquisition module. Stokes parameters at different delay moments are calculated by recording the change of the light intensity of the probe light in the on / off state of the pump light, and polarization information such as the degree of polarization, the azimuth angle and the elliptic polarization is further obtained. The method combines a transient absorption spectrum technology and a polarization modulation technology, has time resolution and polarization resolution capabilities, is suitable for research on anisotropic and chiral polarization sensitive samples and the like, and can be widely applied to polarization related fields such as material research and molecular optical analysis.

The utility model discloses an annular fluorescence excitation loop for transduction and synergy. The annular fluorescence excitation loop comprises a slide, a dichroscope, a first reflecting mirror, a second reflecting mirror and a third reflecting mirror which are sequentially arranged to form a closed-loop light path, the dichroscope is arranged on the laser and fluorescence signal emitting side of the slide, and the dichroscope is used for reflecting the incident laser to the first reflector and transmitting the fluorescence signal from the slide; the first reflector is used for receiving the residual laser reflected by the dichroscope and reflecting the residual laser to the second reflector; the second reflecting mirror is used for receiving the residual laser reflected by the first reflecting mirror and reflecting the residual laser to the third reflecting mirror; the third reflector is used for receiving the residual laser reflected by the second reflector and reflecting the residual laser to the slide; after the scheme is adopted, the laser utilization rate can be improved, so that the problem of low laser utilization rate in the prior art is practically solved.

The application discloses a two-dimensional magnetic field imaging method based on diamond NV color centers, comprising the following steps: generating a rough scanning path according to a region to be measured, controlling a displacement scanning unit to drive a diamond NV color center detection unit to move point by point, locking and triggering collection after reaching a position; obtaining the light detection magnetic resonance spectrum of each measuring point through light excitation and microwave sweep, and calculating the magnetic field information; identifying an abnormal region according to the rough scanning result and generating a fine scanning path, and performing fine scanning on the abnormal region; periodically returning to a reference point to collect a reference spectrum line during the scanning process, and compensating for the drift of the current batch of measuring points, and finally matching the compensated magnetic field information with coordinate information to generate a two-dimensional magnetic field distribution map. The application can improve the positioning accuracy, measurement stability and imaging reliability of two-dimensional magnetic field imaging.