229 results about "Spectrograph" patented technology

The invention provides a spectrograph wavelength calibration method, device and equipment and a medium, and the method comprises the steps: obtaining the spectral data of a spectrograph at different temperatures, and obtaining the spectral data of the spectrograph at different temperatures according to the pixel positions of a characteristic wavelength point at different temperatures and the pixel position of the characteristic wavelength point at a preset reference temperature; determining the pixel position offset of the characteristic wavelength point at different temperatures, and calibrating the wavelength of the spectrograph according to the pixel position offset of the characteristic wavelength point at different temperatures; in the process of calibrating the wavelength of the spectrograph, the wavelength drift caused by the pixel position offset of the characteristic wavelength point at different temperatures is fully considered, the output error of the wavelength of the spectrograph is reduced, and the wavelength output accuracy of the spectrograph is improved.

The invention discloses an on-line detection method for volatile organic compounds in waste gas, and belongs to the field of waste gas emission monitoring, the detection method comprises the following specific steps: I, starting a quantum cascade laser frequency comb of a middle infrared band, calibrating various parameters of the quantum cascade laser frequency comb, and ensuring to cover a characteristic absorption area of the volatile organic compounds in the waste gas; iI, inputting the waste gas into a gas detection chamber through a sampling pipeline, monitoring the state of the waste gas in real time, and dynamically adjusting the conditions of the gas detection chamber according to various collected signals; the device can capture instantaneous fluctuation of waste gas concentration in real time, meets the high-speed dynamic emission monitoring requirement, has extremely high coherence and narrow linewidth, can analyze tiny spectral line differences which cannot be distinguished by a traditional spectrograph, remarkably improves the detection precision and the recognition capability, ensures that a measurement result still keeps consistency and high reliability under different working conditions, and is suitable for large-scale popularization and application. The signal-to-noise ratio is obviously improved, the power drift is reduced, and long-time stable operation is realized.

Performance evaluation and structural optimization methods for a high-power semiconductor laser chip, and a performance evaluation system for a high-power semiconductor laser chip. The performance evaluation method for a high-power semiconductor laser chip comprises: providing a window on an N-side electrode of a chip to be tested (step 1); keeping the chip in an operating state (step 2); allowing a quantum well active region of the chip to generate spontaneous emission, so that the spontaneous emission is imaged outside the chip (step 3); acquiring, by means of a spectrograph, a spectrum of the spontaneous emission outside the chip and obtaining a two-dimensional distribution of a quantum well temperature of the chip in the operating state; and acquiring, by means of a CCD camera, an image of the spontaneous emission imaging outside the chip and obtaining a two-dimensional distribution of charge carriers in the quantum well of the chip in the operating state (step 4). According to the performance evaluation and structural optimization methods for a high-power semiconductor laser chip, the distributions of the temperature and the charge carrier concentration in the quantum well of the chip to be tested in the operating state in which the resolution is freely adjusted can be obtained. Operations of the methods are convenient, and implementation is simple and easy, thereby efficiently improving the accuracy of an evaluation result.

The invention provides a soil stress monitoring method based on a distributed echo wall optical fiber cavity array, which innovatively utilizes a plurality of echo wall structures to realize distributed multi-point monitoring of soil stress in the same optical fiber, and accurately reflects the spatial distribution of the soil stress by monitoring the resonant frequency change of the echo wall structures; the method comprises the following steps: testing connection; monitoring the resonant frequency of the echo wall of the optical fiber echo wall array sensor; a wide-spectrum light source is adopted to excite an optical fiber to generate an optical signal, after the optical signal is transmitted by the optical fiber, when the optical signal passes through echo wall structures with different diameters of the optical fiber echo wall array sensor, the optical signal resonates at resonant frequencies of the echo wall structures, so that resonant trapped waves on multiple frequencies appear in a transmitted spectrum measured by a spectrograph; monitoring the resonant frequency change of the echo wall structure caused by the soil stress, and obtaining the spatial distribution information of the soil stress.

The invention provides a method for testing a phased array compact range of a high-orbit communication satellite. The method comprises the following steps: unfolding and fixing a whole satellite antenna on the ground; confirming that a test coupler is installed and a cable is connected normally; uploading software to a phased array antenna and confirming that the function is normal; setting a phased array transponder path, switching on the change-over switch, and opening the active single machine and the phased array on the path; after the phased array is preheated through telemetering, system-level testing is carried out, wherein at least one performance parameter such as noise spectrum and equivalent omnidirectional radiation power and functions such as program control pointing and beam hopping are tested; program control pointing function verification is performed according to wave beam program control preset pointing, and the DUT turntable is matched to verify the precision; hopping beam function verification jumps according to a preset time slot, and a Zero Span mode of a frequency spectrograph analyzes a time domain characteristic verification time sequence; and switching the phased array to standby after verification, shutting down after telemetering is normal, and recovering the on-satellite state. In this way, it can be ensured that the integration performance of the phased-array antenna and the transponder system meets the design requirement through quantitative analysis.

The invention relates to a self-coherence optical fiber interference device and method for simultaneously measuring morphology and thickness. The device comprises a light source module (1), a measurement light path (2), a compensation light path (3), a spectrograph (4), a mechanical motion module (6) and a data processing module (5), the measuring light path (2) comprises an optical fiber circulator (21), an optical fiber retroreflector (22) and an optical probe (23) and is used for realizing focusing measurement and enabling reflected light of the end face of the optical fiber retroreflector (22) and reflected light of a transparent object to be measured to return; reflected light of the end face of the optical fiber retroreflector (2) and reflected light of the transparent object to be measured form a measuring light beam, and the measuring light beam enters the compensation light path (3); the compensation light path (3) comprises an optical fiber splitter (31), an optical fiber delay line (32) and an optical fiber coupler (33), the measuring light beam is subjected to optical path compensation to generate a compensation light beam, and the compensation light beam and the measuring light beam are combined and input into the spectrograph (4) together.

The invention relates to the technical field of surface topography measurement, and discloses a spectral interference surface topography measurement method and device based on a metasurface. The device comprises a spectrograph, a white light source, an optical fiber, a focusing metasurface and a dispersion metasurface, the focusing metasurface and the dispersion metasurface are arranged in parallel and aligned, a spherical thin lens and a micro-nano structure are arranged on the two sides of the focusing metasurface respectively, and a reflecting metal film is arranged between the two sides; a semi-transparent and semi-reflective film and a micro-nano structure are arranged on the two sides of the dispersion metasurface respectively; the focusing metasurface is used for converging parallel incident light, one part of light serves as reference light and is reflected and focused on the reflective coating by the semi-transparent and semi-reflective film, and the other part of light serves as measuring light and penetrates through the semi-transparent and semi-reflective film; the dispersion metasurface is used for carrying out axial dispersion on light penetrating through the semi-transparent and semi-reflective film, monochromatic light focused on the to-be-measured surface returns along a light path and interferes with reference light, and a confocal signal or an interference signal is generated to calculate morphology information of the to-be-measured surface. By adopting the device, high-precision surface topography measurement can be realized in a narrow space.

The utility model discloses a peristaltic pump for a spectrograph, which comprises a pump body provided with a rotor; the first pumping component is connected to the pump body and located on the upper side of the rotor, the first pumping component comprises a first pump pipe, a first pressing block and a first pressing rod, and the first pressing rod is connected with the first pressing block, drives the first pressing block to move towards one side of the first pump pipe and can drive the first pump pipe to be matched with the rotor in an abutting mode; the second pumping component is connected to the pump body and located on the lower side of the rotor, the second pumping component comprises a second pump pipe, a second pressing block and a second pressing rod, and the second pressing rod is connected with the second pressing block, drives the second pressing block to move towards one side of the second pump pipe and can drive the second pump pipe to be matched with the rotor in an abutting mode; when the rotor rotates, the rotor can drive the first pump pipe and the second pump pipe to pump liquid in the opposite directions. The functions of liquid supply and waste discharge are achieved in the same pump body at the same time, the working efficiency is remarkably improved, the system structure is simplified, and the requirement for additional pumping equipment is reduced.

The invention discloses a spectral analysis device and method for gas Raman scattering of a hollow-core optical fiber, and belongs to the technical field of gas analysis sensing. The spectrum analysis device comprises a laser, a light beam coupling device, a hollow-core optical fiber gas sample chamber, a collecting device and a spectrograph which are sequentially arranged along a light path, the light beam coupling device is used for coupling excitation laser generated by the laser into the hollow-core optical fiber gas sample chamber; to-be-detected gas flows in the hollow-core optical fiber gas sample chamber, excitation laser is conducted, and a transmission light beam containing the excitation laser and Raman scattering light is output; the collecting device is used for separating excitation laser in the transmission light beam and outputting a light beam only containing Raman scattering; a small round hole is formed in an inlet of the spectrograph, spatial filtering is carried out, and the luminous flux lost when a light beam enters the spectrograph is reduced; and the spectrometer receives the Raman scattering to obtain the Raman spectrum of the gas to be detected. The luminous flux lost when the light enters the spectrograph is reduced, the light beam collection efficiency is improved, and the signal-to-noise ratio and the analysis sensitivity are improved.

The invention discloses a portable light intensity verification device, and belongs to the technical field of environment and meteorological monitoring. The portable light intensity verification device comprises a voltage-stabilized power supply, a light source and a shading sealing cover, and the voltage-stabilized power supply is connected with the light source through an electric wire, supplies power to the light source and controls the light intensity of the light source; the light source is a group of LED lamp beads, the shading sealing cover is made of a hot good conductor, a plurality of open holes are formed in the shading sealing cover, and the LED lamp beads are fixedly arranged on the inner wall of the shading sealing cover through the open holes. A heat dissipation assembly can be further arranged to promote heat dissipation of the shading sealing cover. In the process of measuring the photolysis rate of the gas in the atmosphere by a spectroscopic method, the optical receiving head is covered by the shading sealing cover provided with the LED lamp beads, and the spectrograph is subjected to simple, rapid and reliable field calibration or verification, so that the verification work can be carried out without a standard optical platform, and the characteristics of accuracy, convenience and the like are achieved.

The invention provides a device and method for calibrating the wavelength of a spectrometer, and belongs to the technical field of optics, and the device comprises a light source module which is used for outputting wide-spectrum continuous light; the collimation module is used for outputting collimated light based on the wide-spectrum continuous light; the polarizer is used for generating linearly polarized light based on the collimated light; the rotating platform is used for placing a wave plate; the polarization analyzer is located in the light beam output direction of the wave plate; the focusing module is used for converging the light beams output by the polarization analyzer to the spectrograph; the spectrograph is used for detecting the energy of the input light beam so as to output corresponding optical data; the optical data comprises pixels and light intensity data of the input light beam; and a processor for determining a ratio of maximum response discrete light intensity data to minimum response discrete light intensity data based on the optical data, determining a peak center pixel position based on the ratio, and calibrating the spectrometer wavelength based on the pixel position. According to the invention, the technical problem of low accuracy of the wavelength calibration result of the existing spectrograph wavelength calibration method can be solved.

The invention discloses a picture type hyperspectral full-wave band imaging system based on image space scanning. The system comprises a telescope system, an image space scanning mirror, a view field separation device, a spectrograph and a detector, wherein the spectrograph and the detector are arranged at different wave bands from visible light to long-wave infrared light; wherein the image space scanning mirror is in the shape of a cylinder with a right triangle section, a central optical axis is arranged in the image space scanning mirror, and the image space scanning mirror can move in parallel or rotate horizontally along the central optical axis to form rectangular view fields in different directions and at different angles; light from the rectangular area of the earth surface is converged to the image space scanning mirror through the telescope system, and a plurality of rectangular view fields are formed at different positions; and after passing through the field of view separation device, the light is split by a spectrograph and received by a detector in different bands of visible light-long wave infrared, and the problem of virtual focus of an image plane is avoided in the process of obtaining the hyperspectral full-band earth surface information in a picture manner. According to the invention, a foundation is laid for high-resolution area array staring imaging and full-band picture type hyperspectral and multispectral comprehensive detection.

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 discloses a spectrum detection probe and a spectrograph, relates to spectrum detection analysis technical field, said spectrum detection probe includes the shell, wherein the shell is provided with light transmission port, and the shell is internally provided with incident light channel and receiving light channel, said spectrum detection probe also includes incident light subassembly and receiving light subassembly, the incident light subassembly is provided with light transmission port, and the receiving light subassembly is provided with light transmission port and receiving light channel. The incident light assembly is arranged in the incident light channel, the receiving light assembly is arranged in the receiving light channel, and the incident light channel and the receiving light channel are both communicated with the light transmitting opening. The incident light can pass through the light transmitting opening from the incident light assembly, the detection light can enter the light receiving assembly through the light transmitting opening, and an included angle exists between the light propagation direction of the incident light channel and the light propagation direction of the light receiving channel. The spectrum detection probe and the spectrograph provided by the utility model are used for measuring spectrum information of deposits, and have the advantage of high utilization rate of optical signals.

The invention belongs to the technical field of optical measurement, and discloses an implementation device and method of a single-photon spectrograph, and the device comprises a spectral wavelength scanning module which is used for collecting a wide-spectrum optical signal, carrying out the wave division processing, and calculating the photon counting change rate between adjacent wavelengths; wavelength stepping is dynamically adjusted according to the photon counting change rate, self-adaptive scanning of spectrum change is achieved, and a single-spectrum optical signal is output; the self-focusing detection module is used for converting the single-spectrum optical signal into a photon event through a preset array channel; in a preset time window, calculating the variance and the Shannon entropy of each photon event, and constructing a local uncertainty index; performing spectral domain self-focusing and resampling according to the local uncertainty index to obtain photon counting data; high-precision, high-stability and high-efficiency spectrum light signal detection and visual analysis are realized.

The invention discloses an ultrathin metal foil thickness measuring system and method based on Mach-Zehnder interference, and relates to the technical field of ultrathin metal thickness measuring methods. The system comprises a super-luminescent diode wide-spectrum light source SLD, the SLD emits a beam of white light, the white light is divided by a 50: 50 first optical fiber coupler into a light beam I and a light beam II with the same intensity, and the light beam I and the light beam II enter two Mach-Zehnder interference modules with the same structure respectively; the two Mach-Zehnder interference modules are symmetrically arranged along the upper side and the lower side of the sample to be tested, the output ends of the two Mach-Zehnder interference modules are connected with the input end of the second optical fiber coupler, and the output end of the second optical fiber coupler is connected with the input end of the spectrograph. The system and the method have the advantages of high real-time performance, high measurement precision, low cost and the like.

The invention discloses a miniature ultraviolet spectrometer, which comprises a light source assembly, a miniature collimating lens group, a triangular prism, a parallel glass plate, a cylindrical lens and an area array detector, the light output end of the light source assembly faces the incident plane of the miniature collimating lens set, and the emergent plane of the miniature collimating lens set faces the first face of the triangular prism. The emergent surface of the triangular prism is in close contact with the incident surface of the parallel glass plate; the emergent surface of the parallel glass plate faces the incident surface of the cylindrical lens, and is used for refracting light rays close to a total reflection critical angle to form a plurality of light beams; the emergent surface of the cylindrical lens faces the receiving end of the area array detector; and the area array detector processes the received interference fringes to obtain spectral information. According to the micro ultraviolet spectrograph provided by the embodiment of the invention, the light path structure of the spectrograph is simplified, the simplified structure can reduce the loss of light in the transmission process, and more light can reach the detector, so that the accuracy of spectral information is ensured.

The invention relates to the technical field of spectral analysis, in particular to a knapsack type laser-induced breakdown spectroscopy analysis system which comprises a laser, an optical control system, a probe, a spectrometer, an industrial personal computer, a sample to be detected and a knapsack, and the laser, the spectrometer and the industrial personal computer are all arranged in a main bin of the knapsack. The industrial personal computer is electrically connected with the laser, the optical control system and the spectrograph, one side of the backpack main bin is connected with a handheld probe, and the optical control system is arranged in the probe; laser emitted by the laser enters the optical control system to be focused, the focused laser is output from the probe and is used for burning a to-be-detected sample, plasma radiation generated by the to-be-detected sample is received by the probe and is transmitted to the spectrograph, and the spectrograph is used for completing spectrum detection and transmitting a detection result to the industrial personal computer; and the industrial personal computer performs qualitative and quantitative analysis on elements contained in the to-be-detected sample according to the detection result. The invention provides a portable spectral analysis system.

The utility model discloses a belt coal flow coal quality detection device, and relates to the technical field of coal quality detection, the belt coal flow coal quality detection device comprises two support plates, the inner sides of the two support plates are provided with sliding chutes, the interiors of the sliding chutes are slidably connected with a sliding frame through sliding blocks, the front of the sliding frame is fixedly connected with two circular plates, and the circular plates are fixedly connected with the two circular plates. A first driving motor is arranged on the left side of a circular plate on the left side, a second driving motor is arranged on the right side of a circular plate on the right side, a circular sleeve and a second containing box can collect and sample coal above a conveying belt, and then the collected coal can be pulverized through a pulverizing rod in a pulverizing cylinder; according to the coal quality detection device, coal quality can be accurately sampled, the work of operators is relieved, the pulse laser and the spectrograph are matched for work, the spectrograph and the pulse laser are used for coal quality analysis, the components and characteristics of the coal quality can be accurately detected, the working efficiency and accuracy are improved, and the practicability is improved.

The spectrograph comprises a light-emitting element, a diaphragm, a light splitting element and a lead sulfide quantum dot photoelectric detector, the light-emitting element is used for emitting light, the diaphragm is arranged on a propagation path of the light emitted by the light-emitting element, and the diaphragm is used for limiting the width of the light which is emitted by the light-emitting element and passes through the diaphragm. The light splitting element is arranged on a propagation path of light rays irradiated by the diaphragm and used for dispersing the light rays irradiated by the diaphragm into light rays with multiple wavelengths, and the lead sulfide quantum dot photoelectric detector is arranged on the propagation path of the light rays dispersed by the light splitting element and used for receiving the light rays dispersed by the light splitting element and converting the light rays into electric signals. According to the spectrograph provided by the embodiment of the invention, the Pbs quantum dot photoelectric detector is adopted, so that the spectrograph can cover a relatively wide spectral region, the detector does not need to be replaced when the spectrograph performs detection, the detection efficiency is improved, and the cost is reduced.

A Raman spectroscopy apparatus comprises an imaging optical system that transmits light from an object to a spectrograph along an optical path. A scanning device intersects, and is movable with respect to, the optical path. Light is directed onto the scanning device to illuminate the object at a plurality of illumination points. The imaging optical system transmits Raman scattered light emitted from the object at the illumination points to an intermediate image plane, the scanning device being located at the intermediate image plane, and transmits the Raman scattered light from the intermediate image plane to the spectrograph. In comparison with conventional confocal Raman spectroscopy, the apparatus can perform Raman analysis of a sample more quickly, and in comparison with conventional line scan Raman spectroscopy the apparatus can perform Raman analysis more accurately.

The invention discloses a multi-emission composite nano ratiometric fluorescent probe for detecting fluoroquinolone antibiotics and a preparation method of the multi-emission composite nano ratiometric fluorescent probe. The CdTe-Tb-UMP composite nano ratiometric fluorescent probe with double ligands is prepared by taking metal terbium ions (Tb < 3 + >) as central ions and respectively taking uridine monophosphate (UMP) and CdTe quantum dots with red fluorescence emission as bridged ligands. ENR is further coordinated with Tb < 3 + >, energy is transferred to Tb < 3 + > through an antenna effect, so that characteristic green fluorescence of Tb < 3 + > is turned on, and fluorescence of CdTe quantum dots is almost kept unchanged. On the basis, a portable nursing point testing system is further constructed, and the portable nursing point testing system comprises an intelligent mobile phone detector and a wearable fingertip sensor integrated with a micro-fluidic chip and is used for on-site rapid detection of the ENR. The paper-based chip shows rapid and sensitive fluorescence response, and the detection limits of the spectrograph and the paper-based sensor on the ENR are 4.7 nM and 13.1 nM respectively. The probe can be applied to detection of ENR in actual environment water samples, food and drugs.

The utility model discloses a spectrograph which comprises a detection unit and a filtering reflection unit, the filtering reflection unit is arranged between a light source and the detection unit, a path through which light rays emitted by the light source pass is a light path, and the light path passes through the filtering reflection unit and the detection unit; one end, far away from the filtering and reflecting unit, of the detection unit is used for approaching or extending into an object to be detected, the other end of the detection unit and the filtering and reflecting unit are arranged at an interval, the detection unit comprises a light guide part and a photoelectric detector, and the photoelectric detector is far away from the filtering and reflecting unit relative to the light guide part; light emitted by the light source can penetrate through the light guide piece and is received by the photoelectric detector after reaching an object to be detected; the filtering reflection unit is used for focusing light emitted by a light source and then reflecting the light to the light inlet end of the light guide part. According to the utility model, the filtering reflection unit and the detection unit are separately arranged, the heat dissipation and easy maintenance are improved, the process complexity is reduced by collecting light, and the utilization rate is improved.

The utility model relates to the technical field of water extinction coefficient measurement, in particular to an automatic liquid level control device for liquid extinction coefficient measurement, which comprises a measuring tube, an upper communication box and a lower communication box, and the upper communication box and the lower communication box are respectively connected to the top and the bottom of the measuring tube. The lower communication box is provided with a light through hole, a water inlet hole and a first drainage hole, the inner side of the light through hole is connected with a lower window piece, the outer side of the light through hole is provided with a light source, and the water inlet hole is provided with a water inlet assembly; a water drainage assembly is arranged outside the first water drainage hole, the second water drainage hole, the third water drainage hole and the fourth water drainage hole, a measuring hole is formed in the upper communication box, an upper window piece is connected to the inner side of the measuring hole, a shutter and an optical fiber are installed on the outer side of the measuring hole, and the optical fiber is externally connected with a spectrograph. The liquid level control device has the effects of improving the liquid level control precision during liquid extinction coefficient measurement and ensuring the accuracy and the stability of a liquid extinction coefficient measurement result.

The invention discloses an extreme ultraviolet spectrograph calibration method based on extreme ultraviolet diffraction, and relates to the technical field of spectrograph calibration, and the technical scheme is characterized in that a desktop type XUV light source generation device is used for generating XUV light beams; a diffraction device is arranged on the propagation path of the XUV light beam, so that the XUV light beam is diffracted; taking the FID spectral line of the helium atom 2p-1s as an energy reference point, and deducing part of unknown parameters of the diffraction device and the spectrometer according to the separation distance of + / -1 level diffraction beams measured at the position corresponding to the energy; in combination with a Gaussian fitting method, the positions of 0-level light beams and + / -1-level diffraction light beams at other positions on the detector are obtained, and according to a diffraction formula, energy corresponding to all positions on the XUV spectrometer is inverted; calibration precision is ensured by correcting copper mesh placement angle deviation and CCD image angle deviation. According to the invention, XUV light is diffracted by using the copper net, and global continuous calibration of the energy axis of the spectrometer is realized by combining with a characteristic spectral line with a known wavelength.

According to the Mini LED backlight intelligent detection system, an optical detection module shoots full-bright, full-black and gray-scale pictures through a high-frame-rate camera, brightness uniformity is calculated in combination with transmittance data of a diffusion plate, a color gamut coverage rate is analyzed through a spectrograph, and it is ensured that the color gamut coverage rate meets the HDR10 + standard; and the electrical test module adopts multi-power-supply voltage parallel detection, measures the voltage value of each lamp bead in real time, records voltage offset and marks a fault position. The AI defect identification module preprocesses the acquired image, extracts a defect area by using Hough circle transformation and mask processing, and generates a defect thermodynamic diagram; the dynamic performance optimization module suppresses halo and improves contrast by adjusting Local Dimming algorithm parameters; the data uploading and cloud platform integration module compresses data through edge computing equipment and uploads the data to a cloud end for statistical analysis, so that the yield of a production line is monitored in real time, and the detection efficiency, precision and display quality are remarkably improved.

The utility model discloses a transmission / reflection spectrum detection light path structure, which relates to the field of spectrum detection, and comprises an integrating sphere fixedly arranged on the left upper side in a shell; the object carrying cover is arranged on the top surface of the shell, and the object carrying cover is arranged right above the integrating sphere in a covering manner; the left side of the cuvette bracket is fixed at an outlet in the right side of the integrating sphere; the buckling cover is mounted on the top surface of the shell, and the buckling cover is positioned right above the cuvette bracket; the first heat dissipation cover is mounted on the right side of the cuvette bracket; the second heat dissipation cover is mounted at a left interface of the lower end of the integrating sphere; the spectrograph is fixedly mounted in the shell, and the spectrograph is connected with a right interface at the lower end of the integrating sphere through an optical fiber. According to the utility model, transmission and reflection spectrum detection can be simultaneously carried out, the reliability and stability of object detection can be effectively ensured, and the accuracy of a detection result is ensured.

The invention relates to the technical field of optical measurement, in particular to a system and a method for measuring infrared transmissivity of a material under gas radiation interference, and the system comprises a gas heat source system, a transmissivity testing system and a data acquisition and processing system, the gas heat source system provides high-temperature radiation gas for a test cavity of the transmissivity test system; the black body and the spectrograph directly face two to-be-tested materials which are oppositely arranged on the test cavity; and the data acquisition and processing system acquires state parameters of the high-temperature radiation gas, the temperature of the to-be-measured material and optical signals of the spectrograph. According to the invention, the high-temperature radiation gas with controllable state parameters is provided for the test cavity through the gas heat source system, and different gas radiation interference environments are simulated; a spectrograph is used for measuring optical signals, and a data acquisition and processing system is used for acquiring state parameters of high-temperature radiation gas and the temperature of a to-be-measured material, so that data is provided for real infrared transmissivity calculation of the material under radiation interference of different gases.

The embodiment of the invention discloses a drive circuit of a spectrometer and a spectrum detection system, and the drive circuit comprises an oscillation circuit which receives a first control signal and generates a first signal according to the first control signal, and the first signal is a sine wave signal; the shaping circuit receives the second control signal and the first signal and generates a second signal according to the first signal, the frequency of the first signal is equal to that of the second signal, and the second signal is a square wave signal with a preset duty ratio; the amplitude modulation circuit receives the third control signal and the second signal and generates a third signal according to the second signal, and the amplitude of the third signal is different from that of the second signal; and the buffer circuit receives the third signal and generates a driving signal according to the third signal, and the driving current of the driving signal is determined based on the amplitude of the third signal. Based on the control signal, the signal generated by the oscillation circuit is processed by the shaping circuit and the amplitude modulation circuit, and the driving signal with the preset duty ratio and adjustable frequency and amplitude is output.

The invention discloses a complement amplification folic acid optical fiber sensing system and a folic acid concentration detection method thereof. The sensing system comprises an excitation light source, an optical fiber sensing probe, a micro-fluidic plate, a nanogold rod amplification solution and a spectrograph, the excitation light source, the optical fiber sensing probe and the spectrograph are sequentially communicated, the optical fiber sensing probe is introduced into the micro-fluidic plate, the nanogold rod amplification solution is introduced into the micro-fluidic plate, and the nanogold rod amplification solution is introduced into the spectrograph. The optical fiber sensing probe is a folic acid receptor protein modified gold-plated film optical fiber, and the nanogold rod amplification solution is a folic acid modified nanogold rod solution. Under the participation of the gold nanoparticles, the optical fiber sensing probe realizes enhanced plasma resonance wavelength shift, so that the sensitivity of folic acid molecule detection is remarkably improved, folic acid in a solution can be quickly and directly measured, and the application range is wide.