384 results about "Spectrograph" patented technology

The utility model discloses a single-point infrared temperature measuring device for a hot end part of an aero-engine, and relates to the field of temperature in-situ detection of engine blades. The device mainly comprises an optical probe with a cooling function, a spectrograph, a photoelectric detector, a high-precision motion positioning platform and a data processing system. The front end of the optical probe reflects radiation energy on the surface of the blade into the collecting lens set through the reflector, the spectrograph divides spectral energy into three different wave bands, signals are collected through the photoelectric detector and the high-speed data collector, and temperature information is obtained through calibration and analysis. The high-precision motion positioning platform adopts a sliding table and a rotating mechanism, and can control the adjustment of the angle of a reflector and the stretching of an optical probe, thereby achieving the precise measurement of the temperatures of different target positions. The whole device is compact in structure, and has the characteristics of high measurement precision, flexible position, low energy loss and the like, and can resist high temperature of 1500 DEG C.

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 an all-day water body circular polarization hyperspectral measurement method and device. The method provided by the invention comprises the following steps: respectively transmitting circularly polarized white light and linearly polarized white light to a first spectrograph and a second spectrograph, constructing a first equation based on the received circularly polarized white light information, and constructing a second equation based on the received linearly polarized white light information; solving a first correction coefficient and a second correction coefficient by combining the first equation and the second equation; emitting a circular polarization white light source above the horizontal plane of the water area to be detected, receiving scattered light information of substances in the water area to be detected, and correcting the received scattered light information based on a first correction coefficient and a second correction coefficient; and searching and determining target substance attributes corresponding to the actually measured circularly polarized light spectrum curve based on the actually measured circularly polarized light spectrum curve and the circularly polarized light spectrum curve standard library. The all-day water body circular polarization hyperspectral measurement method and device provided by the invention are used for realizing all-day water body circular polarization hyperspectral accurate detection.

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 discloses a Fabry-Perot interference type hydrogen detection device and method. The Fabry-Perot interference type hydrogen detection device comprises a broadband light source, a spectrograph, an optical fiber coupler, a sensing probe, a test gas chamber and a reference probe, the sensing probe and the reference probe are provided with sensor structures based on an optical fiber Fabry-Perot cavity, and the optical fiber coupler outputs input light emitted by the broadband light source to the sensing probe and the reference probe through a port A, a port B and a port C; light reflected by the optical fiber Fabry-Perot cavities of the sensing probe and the reference probe is output to a spectrograph through a D port, so that an interference spectrum is demodulated; hydrogen to be detected is mixed with air, then enters the test gas chamber through the gas flow rate controller, and is discharged from the outlet; the sensing probe adopts an anodic aluminum oxide / palladium film as a terminal reflector of a Fabry-Perot cavity, and an interference spectrum is detected through a spectrograph to obtain hydrogen concentration information in the environment; the reference probe adopts two single-mode optical fiber end faces to align in a sleeve and form an air Fabry-Perot cavity, and the reference probe only provides a stable reference spectrum to realize a vernier effect.

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 invention provides a new material packaging box quality detection device, and relates to the technical field of packaging box detection.The new material packaging box quality detection device comprises a workbench, a detection shell is fixedly installed in the left half area of the upper portion of the workbench through a supporting block, and a spectrograph is embedded in the right side of the bottom end face of the detection shell; when the detection area provided with the packaging box non-standard sample moves to the position of the spectrograph, the proximity switch also senses the matched sensing block, so that the control flashing lamp and the off-post judgment timing module are started, if a worker leaves a post, the off-post judgment timing module cannot be closed, and when a timing value is reached, the microcontroller controls the audible and visual alarm to be started, so that the non-standard sample of the packaging box is detected. The method and the system can be used to attract the attention of surrounding personnel and off-post workers, ensure that the spectrometer fault can be found and processed in time, and solve the problems that the current spectrometer lacks an effective fault detection mechanism, the workers cannot perceive the fault at the first time, the off-post condition of the workers is not considered, and the spectrometer fault is difficult to find and process in time during off-post.

The invention provides an array type near infrared spectrum acquisition coal quality online detection device and method, and relates to the technical field of mineral detection equipment. The multipoint array type near infrared spectrum acquisition on-line detection device comprises a laser range finder, a data processing system, a lifting control system, a liftable ribbon optical fiber, a spectrograph and a light source, the lifting control system can control the lifting and descending of the liftable ribbon-shaped optical fiber according to data acquired by the laser range finder, so that the optical path is kept consistent when the optical fiber acquires the coal flow cross section; and the data processing system performs coal quality information prediction on each detection point of the same coal flow section according to the collected data, and finally adds and sums to obtain a coal quality information prediction value for replacing the coal flow section. According to the coal quality online detection device and method based on array type near infrared spectrum collection, the accuracy of coal quality information prediction is improved, and the sampling and sample preparation process is simplified.

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 provides a coaxial collection laser-induced breakdown spectroscopy device. The coaxial collection laser-induced breakdown spectroscopy device comprises a computer, a laser, a 9-to-1 spectroscope, a photoelectric external trigger unit, a reflector, a dichroscope, a galvanometer group, a field lens, a double-focusing lens group, a spectrograph optical fiber probe and a spectrograph, a laser beam passes through the 9-to-1 spectroscope and the reflector, is deflected, then enters the dichroscope, penetrates through the dichroscope, enters the galvanometer group, is reflected by the X reflector and the Y reflector for multiple times and then enters the field lens, and parallel light is focused to a test sample. A laser induced plasma emission spectrum generated in the laser cleaning process serves as a point light source and is converted into parallel light through a field lens, and then the parallel light enters a dichroscope through an original path of a galvanometer set, deflects to enter a double-focusing lens set and is stably focused to a spectrograph optical fiber probe to be processed and analyzed by the spectrograph. The coaxial collection light path is applied to the galvanometer laser head, plasma emission light can be directly collected in the laser cleaning process, and more efficient signal collection and processing are achieved.

The invention relates to a continuous ion beam screening and enriching system and method and a mass spectrograph, and the continuous ion beam screening and enriching system comprises a vacuum differential unit, a first ion focusing unit, a mass screening unit, a second ion focusing unit, an enriching and releasing unit and a third ion focusing unit which are sequentially arranged from upstream to downstream. The enrichment and release unit is provided with a shell and a plurality of annular electrode plates which are arranged in parallel and located in a cavity of the shell, a resistor and a capacitor are connected between every two adjacent annular electrode plates to form a gradient electric field, and center holes of the annular electrode plates are concentrically arranged to jointly form an ion channel penetrating between an inlet and an outlet of the enrichment and release unit. According to the invention, continuous ion beam low-energy-consumption enrichment and pulse release can be realized, and strict requirements of scientific and industrial fields on mass spectrum detection and ion control precision are met.

The invention discloses a satellite-borne sunlight-induced chlorophyll fluorescence spectrum detection imaging system, and belongs to the technical field of spectral imaging. The system includes a telescope optical system, a field-of-view separator assembly, a hyperspectral spectrometer system, and a hyperspectral spectrometer system. A vegetation chlorophyll signal from the earth surface is condensed by the telescope optical system and then is separated into a first view field object signal and a second view field object signal by the view field separator assembly, and chlorophyll fluorescence information and vegetation photochemical index information are synchronously acquired by the hyper-spectral spectrograph system and the hyperspectral spectrograph system respectively. According to the invention, synchronous high-precision detection of chlorophyll fluorescence and vegetation physiological parameters is realized, dynamic spectrum sampling is supported to match fluorescence peak valley characteristics, and an advanced remote sensing technical means is provided for global vegetation photosynthesis and carbon cycle research.

The invention relates to the technical field of optical fibers, and provides a device and method for measuring size structure parameters of a hollow-core optical fiber, and the device comprises a light source transmitting end (11), an optical circulator (12), a spectrometer (13), and a rotary displacement platform (14). The light source emitting end (11) is connected with a first port (1) of the optical circulator (12), a second port (2) of the optical circulator (12) is aligned with the side surface of a to-be-detected hollow-core optical fiber (15) of which a coating layer is stripped, the to-be-detected hollow-core optical fiber (15) of which the coating layer is stripped is arranged in the rotary displacement table (14), and a third port (3) of the optical circulator (12) is connected with the spectrograph (13); the to-be-tested hollow-core optical fiber (15) is a band-gap hollow-core optical fiber or an N-layer nested anti-resonance hollow-core optical fiber, and N is a positive integer; the detection device is simple in composition, and the detection method is convenient to operate, simple in calculation and good in measurement accuracy.

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 utility model relates to a system for measuring a PL spectrum of a C + L wave band wafer overall plane, and relates to the technical field of semiconductor lasers. Comprising a 980nm pump laser, an optical fiber coupler, a tapering optical fiber, a spectrograph, an electric control two-dimensional translation table, an objective table and a tapering optical fiber clamp. The objective table is used for bearing and fixing a tested wafer and realizing temperature control and heat dissipation of a test environment; the electric control two-dimensional translation stage is fixed with the objective table and drives the objective table to realize the overall displacement of the test wafer; the spectrograph is used for reading the measured light-emitting wavelength and intensity of the test wafer; and the optical fiber coupler is connected with the 980nm pump laser, the tapered optical fiber and the spectrograph, so that the whole optical path structure is connected in series, and the measurement and drawing of the overall plane PL spectrum can be realized. The testing device is simple and low in cost; the testing method is simple and easy to implement, high in accuracy and wide in application range.

An input end and an output end of a first transmission optical fiber are respectively communicated with an output end of a light source and an input end of a light filtering assembly, and an input end and an output end of a second transmission optical fiber are respectively communicated with an output end of the light filtering assembly and an input end of a spectrograph. The output end of the light filtering assembly is electrically connected with the input end of the spectrograph, and excitation light emission signals can be filtered. The in-situ spectrum testing system is suitable for fluorescence testing and ultraviolet-visible absorption spectrum testing scenes. Wherein the first transmission optical fiber and the second transmission optical fiber are respectively used for optical signal transmission of the light source and optical signal input and output of the light filtering assembly. The light filtering assembly is arranged between the light source and the spectrograph, the photon number of the light source signal can be effectively filtered, and it is guaranteed that a sample with a weak fluorescence signal can be tested while the power of the light source is increased.

The invention discloses an adjustable slit device for a spectrograph, and belongs to the technical field of optical analysis instruments. According to the adjustable slit device for the spectrograph, the number of driving parts in the adjustable slit device for the spectrograph is effectively reduced by arranging the two sets of synchronous assemblies, and under the condition that the installation precision of the two sets of synchronous assemblies is guaranteed, the adjustable slit device for the spectrograph is more stable through synchronous movement of the two sets of synchronous assemblies. The size adjusting precision of the pinhole slit defined by the two sets of blades is effectively improved. In addition, a set of adjusting driving part is adopted to provide driving force, and errors and assembly errors caused by asynchronous movement of a plurality of driving parts in related technologies are effectively avoided. The adjustable slit device for the spectrograph is simple in structure, small in size and wide in application scene due to the fact that the number of the driving components is small, and meanwhile the adjustable slit device for the spectrograph is convenient to machine, low in cost and high in assembling quality.

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 invention relates to the technical field of measurement, in particular to an automatic calibration device and method for a spectrograph. Comprising a light source, an optical isolator, an optical fiber coupler, a standard reference light source, an adjustable optical fiber attenuator, a first optical fiber collimator, a holographic frequency selection module, an electric reflector, a volume holographic grating, a second optical fiber collimator, a beam splitter, an optical interface unit, a spectrometer to be tested, a photoelectric detector, an electric reflector driver, an arc second level angle encoder, a control module and a communication module. A computer and an image display unit. The volume holographic grating is used for selecting a specific wavelength to measure the corresponding relation between the spectrograph pixel and the wavelength, monochromatic light can be continuously selected, and the theoretical resolution is consistent with the spectral resolution of the light source; automatic calibration of the spectrometer is realized by using an automatic calibration method, pixel-wavelength calibration data can be automatically generated and stored in a preset format, automatic calibration and data processing of spectral measurement software are facilitated, and pixel-level wavelength-pixel position registration is realized.

The utility model provides a penetration detection system and a laser welding system, the penetration detection system comprises a reference arm, a detection light source and a spectrometer, the detection light source is connected to a light splitting optical fiber coupler, and the light splitting optical fiber coupler splits detection laser into a first emergent light beam and a second emergent light beam; the first emergent light beam is transmitted to the laser welding galvanometer system through a second optical fiber and is reflected at a welding spot to form a first reflected light beam, and the first reflected light beam sequentially passes through the laser welding galvanometer system and the second optical fiber to return to the light splitting optical fiber coupler; the second emergent light beam is transmitted to the reference arm through the third optical fiber and then is reflected by the reference arm to form a second reflected light beam, and the second reflected light beam returns to the light splitting optical fiber coupler through the third optical fiber; and the first reflected light beam and the second reflected light beam are transmitted to the spectrograph through a fourth optical fiber after interfering at the light splitting optical fiber coupler. According to the utility model, the color difference between the detection laser and the welding laser can be effectively corrected, and the detection quality of OCT on penetration detection is improved.

The invention discloses a portable yellow wine alcoholic strength detection device and a rapid detection method. The device comprises a power supply module, a light source module and a spectrograph, the power supply module is connected with the light source module and the spectrograph, a transmission detection module and an optical fiber adjustable attenuator are sequentially connected between the light source module and the spectrograph through optical fibers, and the transmission detection module is provided with a cuvette used for containing a yellow wine solution. An optical signal emitted by the light source module is emitted into the yellow wine solution in the cuvette, passes through the optical fiber adjustable attenuator and then is transmitted into the spectrograph, the spectrograph receives the signal, and the spectrograph is connected with a computer processing unit. The invention has the advantages of small size, light weight and strong portability; the detection speed is high, quantitative analysis of the alcoholic strength of the yellow wine can be completed in a short time, and the detection efficiency is greatly improved; besides, complicated sample pretreatment and professional operation skills are not needed, common personnel can operate the device through simple training, and meanwhile, the manufacturing cost and the use cost are greatly reduced.

The invention discloses an off-axis paraboloid mirror image difference correction high-resolution C-T type spectrum detection method and device, and belongs to the technical field of spectrum imaging and detection. The collimating mirror and the convergent mirror are off-axis parabolic mirrors. The off-axis parabolic mirror is used for correcting the spherical aberration of the spectrometer; suppressing and correcting coma of the spectrometer by using the off-axis angles of the collimating mirror and the convergent mirror and focal length symmetric structure parameters; the field curvature of the spectrograph is corrected by calculating the optimal grating position; performing linear array integral detection on the convergent light by using a small-pixel deep refrigeration array detector; by combining high and low density gratings, the gratings are switched under the application requirements of different wave band ranges, resolving power and scanning speed, and rapid light splitting detection from ultraviolet to infrared broadband is realized; high-precision grating rotary scanning and angle monitoring are utilized, and large-range spectral broadband and high-resolution detection is realized through spectral line splicing. According to the invention, wide-spectrum, high-resolution and high-sensitivity rapid detection of Raman, infrared, emission, absorption and other spectral signals can be realized.

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.