166 results about "Imaging spectrometer" patented technology

The invention belongs to the technical field of ocean water color and ocean ecology, and relates to a near-field actual measurement data set construction method and system for ocean net primary productivity, and the method comprises the steps: collecting profile data observed by a biogeochemical buoy BGC-Argo; s2, respectively performing data quality control processing on the Chl-a profile data and the bbp (700) profile data to obtain profile data after quality control; s3, based on the profile data after quality control, matching remote sensing parameters of a medium-resolution imaging spectrometer (MODIS); wherein the remote sensing parameters comprise photosynthetically active radiation (PAR) and a diffusion attenuation coefficient Kd (490) at a 490nm wave band; s4, on the basis of the profile data after quality control, PAR and Kd (490), utilizing a CbPM model to calculate marine net primary productivity NPP profile data; and S5, carrying out integration on the NPP profile data in a true light layer depth range to obtain NPP data of water column integration. The method can economically and efficiently obtain a large number of NPP samples actually measured in the near field, and makes up for the deficiency of existing actually measured data.

The invention relates to a total primary productivity high-precision downscaling method based on a multi-scale attention mechanism, and belongs to the technical field of remote sensing. According to the method, the technical problems of fuzzy details, fuzzy boundaries and insufficient fitting precision of the existing GPP downscaling technology in a complex terrain region are solved. According to the technical scheme, an Enhanced Multi-scale Residual Attention Network (EMSRAN) model is constructed, multi-source remote sensing data including a medium-resolution imaging spectrometer (MODIS) GPP product and a terrestrial satellite auxiliary factor are integrated, data preprocessing, sample generation and model training and optimization are carried out, and a high-resolution GPP image is output. Technical effects include significant improvement of spatial detail reduction ability, enhancement of heterogeneous ecosystem adaptability, enhancement of boundary definition expression, and improvement of carbon cycle research data reliability.

The invention provides an imaging spectrometer motion compensation imaging model construction method, an imaging model and a device, and relates to the technical field of space remote sensing. The method comprises the following steps: establishing a satellite orbit model, and defining a plurality of coordinate systems such as a detector coordinate system and a spectrometer imaging coordinate system and a conversion relation thereof; constructing a detector-scanning mirror-lunar surface ideal geometric mapping model based on the load optical parameters and a ray tracing method; determining the relation between the rotation angle of the scanning mirror and imaging spectrum view field positioning by using a reflecting prism conjugation theory; a quantitative relation is established by combining parameters such as satellite orbits and position postures, and finally a motion compensation imaging model is established. According to the method, the influence of the on-orbit error on the compensation imaging model is analyzed, and the error is used as an uncertainty component to be coupled into the model. According to the method, the problems of low model precision, neglect of influence of orbit observation parameters on imaging and the like in the prior art are solved, high-precision motion estimation and compensation can be realized, and the quality of data acquired by an imaging spectrometer is remarkably improved.

The invention relates to the field of optical detection, in particular to an interference confocal measurement system based on space coding and a measurement method thereof.White light generated by a light source is collimated through a first collimating lens and then divided into S polarized light and P polarized light through a polarization splitting prism, the S polarized light enters a reference plane mirror through a first quarter-wave plate, and the P polarized light enters a second quarter-wave plate; p polarized light enters a blazed grating through a second quarter-wave plate for transverse dispersion and then is changed into monochromatic polarized light with different wavelengths and the same focal length through a first achromatic lens, and the monochromatic polarized light and the monochromatic polarized light are jointly focused at the same depth position of an object to be measured. Information of the object to be measured is carried and returned to the polarization splitting prism, two beams of polarized light are combined and then focused on a target surface of a photoelectric detector of an imaging spectrometer with a mask plate through a focusing lens, an interference image of the object to be measured is obtained, and spectrum and interference analysis is carried out. According to the invention, the transverse scanning speed can be improved, the measurement time can be shortened, and the resolution can be improved.

The invention provides a slit-type spectral imaging method based on filtering phase reconstruction and a grating spectrometer. The method comprises the following steps: measuring wavefront aberration of a slit-type grating imaging spectrometer before slit filtering by using a wavefront sensor; based on a slit filtering principle, reconstructing a phase function after slit filtering by using wavefront aberration before slit filtering; and capturing a slit image, and reconstructing the slit image by using the reconstructed filtered phase function of the slit to obtain a final reconstructed image. According to the method, effective recovery of the slit imaging data of the grating spectrometer based on the slit is realized, the influence of optical aberration and image noise on the spectrum and spatial resolution of the spectrometer is effectively eliminated, and the slit imaging quality is remarkably improved and is close to the diffraction limit.

The invention, which belongs to the technical field of spectral imaging, discloses an ultra-wide-band ultra-wide-field-of-view high-spectral-resolution real-time imaging spectrometer comprising a first micro-lens array, a plurality of optical fibers, a plurality of second micro-lens arrays and a plurality of assemblies. First micro lenses in each column of the first micro lens array are arranged on a vertical plane arc, and micro lenses in each row are arranged on a horizontal plane straight line, so that incident light of a one-dimensional ultra-wide view field is obtained in real time; through optical fiber coupling, incident light is transmitted to the second micro lens array to be collimated into parallel light beams; according to the components, light of different wavebands is processed through the optical filter, the plane transmission grating and the detector, first-order diffraction light beams of different wavelengths in the different wavebands are received by the detector after diffraction, and space information and spectral information are obtained in real time according to an irradiated target block. The imaging spectrometer provided by the invention has the advantages of ultra-wide wave band, ultra-wide field of view, high spectral resolution, real-time measurement, compact structure and high stability, and is suitable for a remote sensing photoelectric reconnaissance detection system.

A hyperspectral imaging device includes an optical channel arranged to focus light at a first image plane. A spectrometer includes a slit formed at the first image plane to allow a slit-shaped portion of the light pass through. A dispersive element receives light from the slit and spectrally disperses it along a direction perpendicular to a width of the slit. A focusing lens focuses the spectrally dispersed light at a second image plane such that the spectral dispersion is imaged along a first axis thereof, and a spatial image of the slit width is imaged along a second axis for detection by a sensor. A sliding lens group between the optical channel and the first image plane moves to direct the incident light, scanning the entire image over the slit such that multiple frames acquired by the sensor each correspond to a horizontal line of the image.

The invention discloses a thin film thickness measurement system, method and device and a computer readable storage medium, and relates to the technical field of thin film thickness measurement, and the system comprises a light source unit which is used for transmitting an initial light source signal; the light splitting unit is arranged on a transmitting path of the initial light source signal and is used for splitting the initial light source signal into a first light source signal and a second light source signal; the imaging objective lens is arranged on an emission path of the first light source signal, a to-be-measured film is placed at a measurement position, and the imaging objective lens is used for irradiating the first light source signal onto the to-be-measured film, forming a measurement signal and returning the measurement signal; the reference signal unit is arranged on a transmitting path of the second light source signal and is used for returning a reference signal under the action of the second light source signal; and the imaging spectrometer is arranged on the reflection path of the light splitting unit and is used for determining the thickness of the to-be-measured film based on the reference signal and the measurement signal returned by the light splitting unit, so that the measurement accuracy of the film thickness is improved.

The invention provides a lens optical fiber array coupling system and a chromaticity measurement system and method, and belongs to the field of chromaticity measurement, and the lens optical fiber array coupling system comprises an imaging lens which is used for obtaining incident light of an object to be measured and guiding the incident light to an array optical fiber; the end face of the array optical fiber is located on the first image plane of the imaging lens, the normal of at least part of the optical fiber end face in the array optical fiber has a deflection angle relative to the normal of the first image plane, and the deflection angle is angle deflection performed by taking the main light ray of the light received by the corresponding optical fiber position as a target reference; and the imaging spectrometer is used for receiving the light information sent by the array optical fiber. By setting the deflection angle of the array optical fiber, the effective receiving area of the optical fiber is maximized, and the change of the transmission efficiency of light of different wavebands is avoided.

The invention relates to a natural rubber tree detection device and detection method based on a hyperspectral technology. The device comprises a walking chassis, a mechanical arm, an imaging spectrometer, a visual camera, a portable supporting holder, a laser scanning system, a data acquisition system, a data transmission module, a data processing module and a power supply system. Spectral reflection data of different layers of the bark of the rubber tree are obtained by utilizing an imaging spectrometer, efficient sampling is realized by combining laser scanning, and the data are sent to an analysis terminal through wireless transmission. Through a built-in data processing module, a spectrum separation and feature extraction technology is adopted, and a machine learning model is combined to realize prediction of bark health conditions, tree ages and plant diseases and insect pests. The device has the characteristics of portability, non-destructiveness, high efficiency and intelligence, and is suitable for tree health management and precision agricultural monitoring in natural rubber parks.

The invention relates to an automatic identification device and method for mould types and growth stages. The automatic identification device is composed of a microscopic acquisition table and a hyperspectral imaging system. The microscopic acquisition table is composed of a microscopic acquisition box, a light path converter and a microscope, and microscopic information of a sample in the microscopic acquisition box is transmitted to the hyperspectral imaging system through the light path converter. The hyperspectral imaging system consists of a light source, a CCD (Charge Coupled Device) camera, an imaging spectrometer, a controller and a microprocessor, and can automatically acquire microscopic hyperspectral image information of different types of moulds in four different growth stages, namely a spore stage, a germination stage, a hypha stage and a spore production stage, and the types and the growth stages of the moulds are automatically distinguished by a recognition model. The invention further discloses a detection method corresponding to the automatic recognition device for the mold types and the growth stages. According to the invention, real-time, accurate and automatic detection of different types of moulds and various growth stages thereof is realized.

The invention provides a hyperspectral imaging system. The hyperspectral imaging system comprises a telescope group, a collimator objective, a prism, a volume holographic diffraction grating, an imaging objective and an imaging sensor which are arranged in sequence, the telescope group is composed of a primary reflector, a secondary reflector, a third reflector, a plane reflector and an entrance slit; the primary reflector, the secondary reflector and the third reflector form an off-axis three-reflector structure; the plane reflector is used for folding a light path; the collimating objective lens, the prism, the volume holographic diffraction grating, the imaging objective lens and the imaging sensor form an imaging spectrometer, and an entrance slit is used as object space input; the formed off-axis three-mirror and folded light path and an imaging spectrometer are in coaxial butt joint by taking an entrance slit as a node, and are used for joint correction and splicing to form a hyperspectral imaging system. According to the optical path architecture, optimal matching of the unobstructed total reflection front end and the transmission type rear end is realized, and the detection sensitivity of crop weak spectrum signals is greatly improved while a better modulation transfer function of a full view field is ensured.

The present invention relates to a computed tomography spectrometer based on a metasurface diffraction element. The computed tomography spectrometer includes an optical system structure, a focal plane detector, and a data acquisition and processing system; the optical system structure includes a converging lens group, a field stop, a collimating lens group, a metasurface holographic grating, and an imaging lens group. The present invention combines a metasurface with a computed tomography spectrometer, which can avoid the manufacturing difficulties of the computed tomography spectrometer, miniaturize the computed tomography spectrometer, and produce a better diffraction effect, so that the focal plane array target surface and the overall size of the spectrometer are both in the millimeter range, and can realize an imaging spectrometer with a mobile phone terminal or even smaller structure.

The invention belongs to the technical field of Raman signal detection, and particularly discloses a line laser array type optical fiber multipoint Raman spectrum acquisition system which comprises a line laser conversion unit, a scattered light imaging unit, an optical fiber array unit and an imaging spectrometer which are sequentially arranged along a light path, wherein the line laser conversion unit is used for converting a received laser beam into line laser and outputting the line laser to an object to be measured to excite Raman scattering; the scattered light imaging unit is used for collecting Raman scattered light generated by an object to be measured, converting the Raman scattered light into a linear image and coupling the linear image into the input end of the optical fiber array unit; the output end of the optical fiber array unit is connected with the imaging spectrometer; and the imaging spectrometer is used for synchronously analyzing signal spectrums at different positions on the linear image. According to the invention, a line laser technology, an optical fiber array technology and a Raman spectrum acquisition technology are combined, multi-point synchronous excitation Raman scattering and multi-point batch acquisition and analysis are realized, and compared with existing Raman spectrum acquisition and detection equipment, the device is faster and more efficient.

The utility model discloses a multi-source target detection device, and relates to the field of spectral detectors, a hyperspectral imaging module comprises a movable imaging lens protruding out of a mounting shell, an imaging spectrometer communicated with the imaging lens, and a detector mounted at the output part of the imaging spectrometer; the RGB camera and the imaging lens are located in the same acquisition direction, and a lens of the RGB camera is embedded into the surface of the shell to acquire an RGB image; the push-sweeping module is mounted on the inner wall of the mounting shell and comprises a driving motor, a sliding rail and a push-sweeping platform; the push-broom platform is mounted on the slide rail, the imaging lens is embedded in a mounting hole of the push-broom platform, and light enters through a slit at the entrance of the spectrometer; the push-scan platform is controlled based on the driving motor and moves along the sliding rail, and a hyperspectral image is obtained through push-scan. According to the scheme, the problems of poor precision and difficulty in correction of aircraft push-scan imaging are solved through the built-in push-scan module, and image type diversification is realized through the built-in multifunctional camera module.

The application discloses a kind of full polarization spectral imaging device and detection method, contain sequentially arranged polarization modulator, imaging spectrometer, data acquisition processing display system to incident light;Polarization modulator is single fixed retarder and single fixed linear polarizer sequentially arranged along incident light, can carry out spectral modulation to full stokes parameter, it has the superiority of simple, ultra-compact, miniaturization, anti-system error in structure.By constructing complete imaging physical model or constructing imaging physical model based on compressed sensing, then using untrained artificial neural network realizes the full stokes parameter image reconstruction under each narrow waveband, and the deep neural network of "black box operation" is endowed with physical meaning.The reconstructed polarization spectral resolution can be consistent with the resolution of the imaging spectrometer used;And it has the characteristics of strong anti-noise ability, so as to ensure high-quality reconstruction.

The invention provides an adjustable filter based on temperature change characteristics according to the problem of traditional filtering limitation, and relates to the technical field of filter design in imaging spectrometers. According to the adjustable filter provided by the invention, the temperature is taken as an independent variable, and the change of the transmissivity of the thermally induced phase change material in the phase change temperature interval is converted into the change of the transmission spectrum of the interference film along with the temperature, so that the adjustable function of the filter is realized. Through a temperature-transmissivity spectrum mapping relation, continuous spectrum tuning without mechanical motion and with low power consumption is realized, and an innovative filtering solution is provided for an imaging spectrometer. Meanwhile, the filter regulation and control function is achieved, meanwhile, the temperature change transmission spectrum characteristic meets the requirement of spectrograph inversion, that is, original data of spectrum inversion is provided for transmissivity spectrums at different temperatures, and therefore the invention further provides a spectrum inversion method. The method can be applied to the technical fields of environment monitoring, medical diagnosis, intelligent manufacturing and the like.

The application discloses a kind of global light path adjusting devices and adjusting methods of correction lens group for solar imaging spectrometer, including correction lens group and adjustment shim, the front end of correction lens group is formed as first reference surface, the rear end of correction lens group is formed as second reference surface;The first reference surface of correction lens group is used as the reference of off-axis three-mirror optical system of global light path system of solar imaging spectrometer;The second reference surface of correction lens group is used as the reference of spectral scanning imaging system of global light path system of solar imaging spectrometer.The adjusting device and method of the application utilize the design of the form of self connection interface and the introduction of adjusting reference, reduce the difficulty of angle adjusting of lens group by means of external reference mirror in the prior art, can quickly and accurately connect the optical system of front end and rear end, ensure that the imaging quality of imaging spectrometer optical system is optimal.

This invention provides a catadioptric shortwave infrared imaging spectrometer, comprising, in order of light incidence, an entrance slit, a plane mirror, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, a grating, and an imaging sensor. The plane mirror, together with the upper portions of the first, second, third, fourth, fifth, sixth, and seventh lenses, forms a collimation system. The grating, together with the lower portions of the seventh, sixth, fifth, fourth, third, second, and first lenses, and the imaging sensor, together form an imaging system. Collimation and imaging share a single lens group, resulting in a compact structure, easier aberration correction, simpler assembly and adjustment, better image quality, lower tolerance sensitivity, and reduced assembly difficulty.

The utility model discloses an imaging spectrometer monochromator convenient to install and adjust, which relates to the technical field of optical instruments and comprises a fixed bottom plate, and an entrance slit group, a collimation imaging light path group, a grating group, a focusing imaging light path group and a detector assembly which are fixed on the fixed bottom plate and are sequentially distributed on a light path, the entrance slit group is connected to the fixed bottom plate through the slit adjusting plate; the collimation imaging light path group and the focusing imaging light path group are arranged on the fixed bottom plate through the support adjusting assembly; the grating group is connected to the fixed bottom plate through a grating adjusting plate; and each component can be finely adjusted. The assembling and adjusting operation is simpler, more convenient and faster, and the consistency, the reliability and the production efficiency are improved.

The invention relates to the field of remote sensing detection imaging systems, in particular to a polarization hyperspectral imaging system, an imaging method and application, and the system comprises a housing, an imaging lens, an imaging spectrometer, an area array polarization camera, a focusing translation assembly, a push-broom translation assembly and a processor. A mounting hole is formed in one side wall of the shell; the imaging lens is fixed on the casing through the mounting hole and extends out of the casing; an imaging spectrometer and an area array polarization camera are sequentially arranged in the machine shell from the imaging lens to the back, and the imaging spectrometer is connected with the area array polarization camera. The focusing translation assembly is arranged in the shell, the push-broom translation assembly is arranged on the focusing translation assembly, and the imaging spectrometer is arranged on the push-broom translation assembly; the processor is arranged in the machine shell and connected with the area array polarization camera, the focusing translation assembly and the push-broom translation assembly, and the processor is connected with an electronic output interface.

The invention discloses scanning measurement equipment and a control method thereof and a storage medium, and relates to the technical field of measurement equipment, the scanning measurement equipment comprises a base frame, a measurement mechanism and a material conveying mechanism, the base frame comprises a conveying table and a supporting frame, the conveying table is provided with the material conveying mechanism, and the supporting frame is provided with the measurement mechanism; the measuring mechanism comprises an imaging spectrometer, a lighting mechanism, a rotating mechanism and an objective lens, an entrance slit of the imaging spectrometer is located at the image plane position of the objective lens, the lighting mechanism is installed on the side face of the objective lens, and the rotating mechanism is in transmission connection with the objective lens; a light beam emitted by the illumination mechanism forms a linear illumination area on the sample to be detected through the objective lens; the imaging spectrometer receives a measurement signal generated by the to-be-measured sample through the objective lens. According to the invention, by introducing the rotating mechanism into the measuring mechanism, the cooperative movement of the rotating mechanism and the material conveying mechanism can be realized, so that the packaging film can be scanned and measured in any direction, and the efficiency and accuracy of packaging film detection are improved with low cost.

The present application relates to a kind of based on spectrometer imaging method and system of blaze grating.From the far field light of incident slit, into plano-convex lens, refract by plano-convex lens and meniscus lens, after again passing through thick catadioptric mirror concave surface reflection, with convergent light beam form is incident to convex blaze grating, after grating diffraction and reflection, form multiple beam single wavelength divergent light beam, in turn through thick catadioptric mirror reflection, meniscus lens and plano-convex lens refract, image on image plane, realize spectral imaging.The present application adopts immersion littrow-Offner structure, incident slit is off-axis in meridian and sagittal direction, so that incident slit and image plane are separated, facilitate engineering implementation;Spectrometer imaging system uses full immersion optical path, so that imaging spectrometer structure is more simple and compact, more convenient to assemble and use;Grating selects convex blaze grating, has high diffraction efficiency, so that the present imaging system can play a role in more extensive application field.

The invention relates to a stray light suppression system based on a Dyson structure, and relates to the technical field of stray light suppression. The system comprises a spectrograph, an optical fiber array, a Dyson optical structure and a CCD (Charge Coupled Device) which are sequentially connected in a light path direction, wherein the Dyson optical structure comprises an image surface, a lens group and a reflector which are sequentially connected in the light path direction; the optical fiber array is connected with the Dyson optical structure at the image plane position; and the CCD is arranged at the image plane position. The stray light suppression system based on the Dyson structure is based on the design principle and structural characteristics of an existing imaging spectrometer, and stray light outside a view field is difficult to effectively improve by using a traditional method; based on a Dyson structure refraction and reflection concentric integration characteristic, an optical fiber array is used as a bridge and is coupled to an image plane position of an imaging spectrometer, and the optical fiber array and pixels are in one-to-one correspondence, so that separation of stray light and effective signals is realized, and stray light suppression capability is greatly improved.

This invention relates to the field of imaging spectrometer technology and discloses an imaging spectrometer assembly and adjustment method. The method includes: installing an auxiliary assembly and adjustment slit assembly at the spectrometer slit assembly mounting position; coarsely adjusting the detector using a first adjustment device to obtain a first position range that meets the first coarse adjustment conditions; successively adjusting the detector position within the first position range using the first adjustment device; after each adjustment, illuminating the auxiliary assembly and adjustment slit assembly with beams of different wavelengths using a monochromatic light source to form a slit image on the detector; determining the spectral resolution of the current detector position in the first preset field of view based on the response value of the slit image in the first preset field of view during each wavelength illumination; and determining the fixed position of the detector based on the spectral resolution of each wavelength in the first preset field of view. This invention enables quantitative optimization of spectral resolution and improves assembly and adjustment accuracy.

The invention belongs to the technical field of imaging spectrometers, and particularly relates to an airborne high-frequency linear array sweep imaging spectrum system based on an optical waveguide device. The system comprises a telescope objective and a spectrometer and further comprises an optical waveguide device coupled between the telescope objective and a slit of the spectrometer, the optical waveguide device comprises an optical switch and a beam splitting optical fiber which are connected in sequence, the optical fiber array end of the optical switch is coupled to the focal plane of the telescope objective, and the optical switch rapidly switches on and off of all optical fibers at the optical fiber array end. And the beam splitting optical fiber enables a scanning result of the optical fiber array end to correspondingly enter a slit of the spectrograph so as to realize sweep imaging. The linear array sweep imaging spectrum system is innovated and optimized, and the scanning efficiency of the linear array sweep imaging spectrum system is greatly improved.

The present invention discloses a method for measuring the PRNU characteristics of an imaging spectrometer array detector. By constructing an optical model based on a monochromatic LED and an optical pinhole, an ideal correction light source can be obtained through a light field model fitting method of a diffraction spot. The method has a simple structure, reduces the PRNU correction error introduced by the light source, and realizes low-cost, high-precision PRNU testing. By adjusting the spot size and position, pixels in different areas on a single detector can be irradiated with light of different wavelengths. A control group area can be set to realize the study of the relationship between the PRNU of the imaging spectrometer detector and the wavelength, and the relationship between the PRNU and the irradiation time, thereby improving research efficiency and reliability.

This invention proposes a method for correcting image non-uniformity in an imaging spectrometer using uniform bright and dark regions. The method includes: obtaining correction coefficients in the laboratory for preliminary detector pixel calibration; selecting uniform bright and dark regions from the spectral band unaffected by banding noise after coefficient correction; applying a threshold constraint using an improved iterative method to remove abnormal signals in the uniform bright and dark regions to obtain a stable reference value; and using the reference value to calculate the gain and bias of all pixels in the spatial dimension, ultimately correcting non-uniformity across the entire image and spectral band. This method requires only a single non-uniform image that meets the requirements as input to quickly obtain good correction results, with low computational complexity and high correction speed.

The application discloses a design method of a free curved surface concave grating imaging spectrometer, which comprises the following steps: S1, selecting a series of light rays incident from different positions of a slit as characteristic light rays; S2, calculating the coordinates and normal of a characteristic data point at the intersection of the characteristic light rays and a free curved surface concave grating surface; S3, obtaining an initial structure by fitting the free curved surface of the free curved surface concave grating; and S4, optimizing the initial structure. The application also relates to a free curved surface concave grating imaging spectrometer obtained by using the design method of the free curved surface concave grating imaging spectrometer.

The application discloses an infrared large-view-field wide-spectrum multi-spectrum imaging spectrometer optical system, which is coaxially arranged in sequence from an object plane to a focal plane as a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a filter wheel; the first lens and the fourth lens are meniscus positive lenses, the second lens, the third lens and the fifth lens are meniscus negative lenses, and the sixth lens is a double-convex positive lens. The application adopts common chalcogenide and zinc selenide crystal infrared materials, corrects aberration and chromatic aberration by optimizing surface shape parameters of each surface and adopting aspheric surfaces, realizes high-quality imaging in a wide waveband range of 2.5-15 mu m, has the characteristics of large view field, small distortion, athermalization and super-long back intercept, is easy to produce and adjust, has strong versatility, and can be applied to the fields of monitoring of chemical harmful gases, environmental protection, agriculture and food safety, medical treatment and health and judicial identification.