257 results about "Broadband light source" patented technology

The invention discloses a calibration device with a spectrum self-calibration function and a high-resolution spectrum calibration method thereof. The device comprises a narrow-band light source, a broadband light source, an optical fiber isolator, a coupler, an interference system, a multi-way switch, an FP (Fabry-Perot) cavity, a collimator, an orthogonal dispersion system and a computer, wherein the orthogonal dispersion system consists of a cylindrical lens, a reflector, a virtual phase array, a grating, a focusing lens and an industrial camera; according to the device, different light source paths are gated, FP cavity modulation and orthogonal dispersion system light splitting are utilized, and an industrial camera is combined to receive light signals. According to the method, the mapping relation between pixels and wavelengths can be established, the two-dimensional spectrum is compressed into the one-dimensional calibration spectrum through light intensity modulation and normalization processing, the calibration process of the orthogonal dispersion system is simplified, and the measurement precision is improved; and system drift can be compensated in real time through self-checking calibration, and the reliability of a measurement result is ensured, so that accurate calibration and measurement of a high-resolution spectrum can be realized.

The invention relates to the field of optical measurement, in particular to a reflective interference film thickness measurement method and system for eliminating back scattering of a transparent substrate, and the method comprises the following steps: transmitting a light beam through a low-coherence-length broadband light source, and forming linearly polarized light through polarization modulation; focusing the light beam to the surface of the film through a confocal optical system; collecting reflection interference signals of the upper surface and the lower surface of the film; spatial filtering, low-coherence gating and polarization control are used for cooperatively inhibiting back scattering of the substrate. And processing the acquired interference signal, and calculating to obtain film thickness information. According to the invention, triple inhibition mechanisms are adopted for synergistic effect, and the method comprises the following steps: spatial filtering: shielding out-of-focus back reflected light through a confocal small hole; low-coherence gating: using a short coherence length to naturally suppress a reflected signal beyond a coherence range; and polarization control: further weakening stray light interference through polarization state matching, and effectively suppressing back scattering of the substrate.

This invention relates to the field of optical imaging and detection technology, specifically providing a broadband snapshot-type polarization interferometry imaging detection system and method for breast tumors. A broadband light source illuminates a breast tumor tissue sample. The reflected signal light is collected and collimated by a pre-optical system, then sequentially passes through a first and a second ray shaping unit for two shearing and two polarization state transformations, resulting in two beams of linearly polarized light and two beams of circularly polarized light. These beams are imaged by an imaging lens to an area array detector to obtain a polarization interferogram, which is then demodulated to obtain all Stokes parameters of the breast tumor tissue sample. This invention achieves broadband snapshot imaging of breast tumors with all Stokes parameters without using an analyzer, doubling the light throughput compared to traditional polarization imaging instruments using analyzers. Furthermore, this invention has advantages such as compact structure, no moving parts, easy assembly and adjustment, and no need for image registration.

The invention relates to the technical field of spacecraft structure micro stress detection, in particular to a spacecraft structure micro stress detection device and a use method thereof, and the spacecraft structure micro stress detection device comprises a displacement amplification structure, a single mode fiber, a reflector, a broadband light source and a spectrum analyzer. An optical resonant cavity formed by an optical fiber end face and a lens is combined with a displacement amplification structure, when stress acts on a spacecraft structure, the cavity length of the Fabry-Perot resonant cavity changes, so that phase movement of light is caused, and accurate measurement of the stress can be achieved by detecting the phase movement. The antenna has extremely high anti-electromagnetic interference capability, and can work stably in a complex space environment. Even under the condition of violent temperature change, high measurement accuracy can be kept, and detection of tiny stress can be achieved through the amplification effect of the displacement amplification structure. And the stress characteristic signal and the background noise can be effectively separated, so that the detection reliability is remarkably improved.

The invention aims to provide a dual-channel Fabry-Perot cavity optical fiber pressure sensor with high reliability and high precision and a preparation method thereof, the dual-channel Fabry-Perot cavity optical fiber pressure sensor comprises a base, a pressure-sensitive diaphragm and an optical fiber, the pressure-sensitive diaphragm is hydrogel based on a PVA-boric acid complex structure, a carbon dot fluorescent nano-material is doped in the hydrogel, and the optical fiber is doped in the carbon dot fluorescent nano-material. The dual-channel optical system comprises a pressure sensing channel for detecting the change of a Fabry-Perot cavity interference spectrum by adopting a broadband light source, and a damage monitoring channel for exciting carbon dot fluorescence by adopting an excitation light source and judging diaphragm damage through the change of fluorescence signal intensity. The pressure-sensitive diaphragm based on a PVA-boric acid complex structure has a self-repairing function and can drift for a long time; 0.5% F.S. / month, the service life of the sensor is prolonged, and the accuracy of pressure acquisition is improved; meanwhile, a carbon dot fluorescent nano-material with excellent biocompatibility is doped into the pressure-sensitive diaphragm, so that real-time self-monitoring of optical damage is realized, and the carbon dot fluorescent nano-material is used as an auxiliary function to improve the reliability of pressure acquisition of the sensor.

The present invention relates to the technical field of optical fiber sensing. Disclosed are a multi-core grating sensor and a manufacturing method therefor, and a permafrost monitoring method. The multi-core grating sensor comprises a multi-core optical fiber grating, a strain gauge structure, and a demodulator, and the multi-core optical fiber grating comprises four uniformly and symmetrically distributed single-mode optical fibers, a cladding layer wrapping the four single-mode optical fibers, and a coating layer located between the single-mode optical fibers and the cladding layer; the strain gauge structure is attached to the outside of the multi-core optical fiber grating by means of glue bonding; and the demodulator is used for monitoring the dynamic change of the wavelength of the multi-core optical fiber grating, the demodulator comprises a broadband light source and a spectrum analyzer, an incident end of the multi-core optical fiber grating is connected to the broadband light source by means of the single-mode optical fibers, and an exit end thereof is connected to the spectrum analyzer by means of the single-mode optical fibers. Also disclosed in the present invention is a permafrost monitoring method. By means of comprehensive analysis and demodulation of fiber core wavelength variation amounts of a plurality of single-mode optical fibers on a single multi-core optical fiber grating, simultaneous measurement of multiple parameters is achieved, and the permafrost monitoring accuracy is improved.

A method and a system have been developed to calibrate the total spectral radiance factor (TSRF) obtained from different instruments. A broad-band light source covering the whole visible range as well as the fluorescence excitation wavelengths is used to measure the TSRF, and one or more narrow-band light sources outside of the fluorescent band is used to measure fluorescent spectral radiance factor (FSRF) separately. After that, the TSRF is adjusted by the FSRF, and a calibrated TSRF can be obtained. This can be applied to characterize Optical Brightening Agents (OBAs) as well as other fluorescent materials without requiring any moving part of the instrument to do the calibration.

The invention provides a photoacoustic sensor and a sensing system for trace C4F7N gas detection, and relates to the technical field of C4F7N gas detection. The system comprises a broadband light source used for generating wide-spectrum infrared light; the modulation unit is used for carrying out intensity modulation on the wide-spectrum infrared light; the photoacoustic cell is used for receiving the modulated light beam and exciting C4F7N gas to generate a photoacoustic signal; the sound detector is used for detecting a photoacoustic signal; the signal processing unit is used for processing the photoacoustic signal to obtain the C4F7N gas concentration; the broadband light source is a blackbody radiation source; the photoacoustic cell is a spherical Helmholtz resonant cavity, is of a differential structure and comprises two spherical resonant cavities; and the two sound detectors are symmetrically arranged on the cavity walls of the two spherical resonant cavities. The black-body radiation source is used as a broadband light source, and the differential spherical Helmholtz photoacoustic cell is coupled with the black-body radiation source, so that the system cost and the integration complexity are remarkably reduced on the premise of keeping the advantage of high sensitivity.

The invention discloses an optical detection system and method, and belongs to the technical field of optical non-contact measurement. According to the invention, a low-coherence wide-spectrum light source is adopted, a dispersion element and an array detector are combined to separate a wide spectrum in space so as to construct a plurality of parallel independent wavelength measurement channels, and meanwhile, an envelope extraction algorithm based on empirical mode decomposition, Hilbert transform and window length adaptive Savitzky-Golay filtering is integrated; real-time quality evaluation and dynamic weighted fusion are carried out on each channel signal, vibration measurement continuity and stability in a severe speckle environment are remarkably improved, high-dimension wavelength diversity is realized at low cost, real-time quality evaluation and weighted fusion are carried out through a self-adaptive envelope extraction algorithm, and the accuracy of vibration measurement is improved. And finally, a vibration measurement value of which the signal-to-noise ratio and the measurement precision are remarkably improved is output.

The invention discloses an optical fiber sensing monitoring system suitable for a complex environment, and aims to solve the problems of insufficient demodulation precision, temperature-strain cross sensitivity, lack of a dynamic environment disturbance real-time compensation mechanism and fixed and rigid alarm strategy of a traditional optical fiber sensing system under a strong noise background. Comprising a broadband light source module, an optical fiber sensing array module, a signal demodulation and acquisition module, an adaptive signal processing module, an intelligent discrimination and alarm module and a system control and data management module. Through an adaptive signal processing chain integrating multi-scale noise suppression, cross-sensitive decoupling and dynamic disturbance compensation, the measurement precision and long-term stability of the system in strong noise, multi-physical field coupling and dynamic disturbance environments are significantly improved, the strain measurement error is reduced to + / -2 [mu] epsilon, and the temperature measurement error is reduced to + / -0.5 DEG C. A self-adaptive alarm threshold mechanism based on environment complexity perception is adopted, the limitation of a fixed threshold strategy is overcome, false alarm and missing alarm are reduced, and the reliability of a monitoring result is improved.

The invention discloses a multi-area real-time end point detection system and method for cleaning a semiconductor chamber, and relates to the field of semiconductor gas detection, a gas path unit is provided with a main gas inlet, a first branch, a second branch and a valve module used for connecting or disconnecting the first branch or the second branch; a first broadband light source and a first multi-channel photoelectric detector are oppositely arranged on the two sides of the first cavity, and optical filters with different central wavelengths are arranged in multiple channels of the first multi-channel photoelectric detector respectively; a plurality of second photoelectric detectors, a plurality of target light sources and a displacement platform are oppositely arranged on the two sides of the second cavity, and the target light sources are installed on the displacement platform and can move relative to the second photoelectric detectors; and the control module is in signal connection with the valve module, the first multi-channel photoelectric detector, the displacement platform and each target light source. By adopting the scheme, the detection efficiency is considered while the detection precision is ensured, and more reliable real-time end point judgment can be realized in a complex gas flow field environment.

The invention discloses a temperature and hydrogen concentration dual-parameter synchronous detection system and method, and the system comprises an ASE broadband light source, the output of the ASE broadband light source is divided into two paths through a coupler, one path enters a first circulator, the other path enters a second circulator, the output of the first circulator enters a first FBG sensor, the output of the second circulator enters a second FBG sensor, and the output of the first FBG sensor enters a second FBG sensor. The two FBG sensors are arranged in the gas chamber, the first FBG sensor and the second FBG sensor are provided with FBG topological optical fiber structures with different working wavelengths and have temperature sensitivity and gas selective response, and reflected signals of the two FBG sensors are coupled to one path through the dual-channel wavelength division multiplexer and are sent to the spectrum analyzer for wavelength demodulation. The temperature sensitivity and the gas selective response are integrated in the same sensing unit by utilizing the wavelength coding characteristic of the fiber bragg grating, so that precise decoupling and real-time output of double parameters are realized, and the detection efficiency and the data consistency are improved.

An LSP broadband light source is disclosed. The light source may include a gas containment structure. The light source may include a plurality of jet nozzles, wherein the jet nozzles are configured to generate a supersonic gas jet and direct the supersonic gas jet to collide within the gas containment structure to form a localized high pressure region at a point of collision. The light source may include a primary laser pump source, wherein the primary laser pump source is configured to direct a primary pump beam to a localized high pressure region formed at the point of impact. The light source may include a pulsed assist laser source, wherein the pulsed assist laser source is configured to direct a pulsed assist beam to the localized high voltage region at the point of impact. The light source may include a light collector element configured to collect broadband light emitted from a plasma.

The invention discloses a micro double-arm vector sensor and a preparation method thereof, and belongs to the technical field of optical fiber sensing. According to the technical scheme, the micro double-arm vector sensor comprises a broadband light source, a first single-mode optical fiber, a second single-mode optical fiber, a first coupling point, an interference arm with a core shift structure, a sensing arm, a second coupling point, a third single-mode optical fiber, a fourth single-mode optical fiber and a spectrum analyzer. The Mach-Zehnder interferometer has the advantages that a micro-double-arm Mach-Zehnder interferometer is formed on the basis of a core shift structure, an asymmetric structure is formed, light transmitted in the asymmetric structure is more sensitive to changes of the bending size and direction, and the vector bending sensitivity is high. Meanwhile, an online Mach-Zehnder interferometer needs to introduce a special optical fiber with high price in order to monitor the vector bending, and the structure only needs a single-mode optical fiber with low price, and is more suitable for batch production.

This invention discloses a multi-channel programmable miniaturized high-speed FBG demodulation system and method based on an AWG (Optical Fiber Optic Generator), belonging to the field of fiber optic sensing technology. The AWG-based multi-channel programmable miniaturized high-speed FBG demodulation system includes a high-stability broadband light source module, a low-loss isolation module, a miniaturized programmable fiber optic amplifier, a circulator, a two-stage miniaturized high-speed optical switch, a high-crosstalk AWG module, a photoelectric conversion module, a programmable A / D conversion module, and a core control module. The AWG-based multi-channel programmable miniaturized high-speed FBG demodulation method involves the optical signal entering an FBG sensor array, the FBG sensor reflecting the optical signal, the reflected optical signal entering the AWG module, and the output light undergoing photoelectric conversion to calculate the center wavelength of the FBG sensor. This invention, based on an AWG, improves demodulation accuracy while ensuring the demodulation range, achieving continuous wavelength demodulation within the AWG wavelength range.

A calibration light source includes: a broad band light source emitting light in a broad spectral range; and a filter receiving light emitted by the broad band light source and providing structured light by imposing an attenuation pattern exhibiting pattern features at multiple spectral reference lines on the received light such that an emission spectrum of the structured light emitted by the calibration light source exhibits distinct, identifiable emission spectrum features corresponding to the pattern features at the multiple spectral reference lines. A method of calibrating at least one spectrometer using the calibration light source is further disclosed.

A system may include a broadband light source emitting polarized light that is polarized to two orthogonal polarization states, multiple beam splitters for combining and splitting the polarization states, and interferometric cell for creation of interference patterns with respect to a sample surface, lenses of appropriate design that focus the polarized light at predefined locations, and sensors that analyze the polarized light as a function of angle and wavelength. The system may also include a controller configured to modulate the reference arm through operation of an optical chopper and allow for different data analysis modes to be used on the system produced data.

The application discloses a fiber refractive index sensor based on a vernier effect, which comprises a broadband light source, an isolator, a first fiber ring resonant cavity, a second fiber ring resonant cavity, a refractive index sensitive unit, a spectrum analysis module and a data processing unit; the input end of the isolator is connected with the output end of the broadband light source; the input end of the first fiber ring resonant cavity is connected with the output end of the isolator; the input end of the second fiber ring resonant cavity is connected with the output end of the first fiber ring resonant cavity; the first fiber ring resonant cavity and the second fiber ring resonant cavity constitute a cascaded fiber ring resonant cavity; the refractive index sensitive unit is connected into the second fiber ring resonant cavity; the input end of the spectrum analysis module is connected with the output end of the second fiber ring resonant cavity; and the input port of the data processing unit is connected with the output port of the spectrum analysis module. The application has the characteristics of high sensitivity, simple structure, high demodulation precision and suitability for mass production.

The invention discloses a method for measuring a residual birefringence difference value of a transparent ferroelectric electro-optical material based on a Fabry-Perot resonant cavity. The method comprises the following steps: constructing a Fabry-Perot resonant cavity measuring light path consisting of a broadband light source, a polarization control assembly and a sample to be measured; the polarization state of incident light is accurately controlled through a magnetic control Faraday rotating mirror, and transmission spectrums in the o-light direction and the e-light direction are obtained respectively; a high-precision spectrum acquisition module is adopted to record transmission spectrum characteristics; based on an original spectrum processing algorithm, the residual birefringence difference value of the to-be-detected material is calculated by analyzing the resonant wavelength offset and the free spectrum range change of the o-light and e-light transmission spectrums. The method solves the problem that the weak birefringence detection capability of the existing measurement technology is insufficient, has the advantages of high measurement precision, strong anti-interference capability and the like, and is suitable for performance evaluation, process optimization and device performance improvement of the transparent ferroelectric electro-optical material.

The invention provides a calcium ion concentration detection sensor based on a hydrogel-coated tilted fiber bragg grating and a preparation method of the calcium ion concentration detection sensor. The sensor is composed of a broadband light source, a polarization controller, a TFBG sensor and a spectrum analyzer. The broadband light source is used for providing a light source, the polarization controller is used for obtaining the P polarization state of input light, the hydrogel functionalized TFBG sensor is used for detecting the concentration of a calcium ion solution in the flow cell, the spectrometer is used for monitoring and recording the spectrum change condition, and the solution concentration is obtained according to the transmission spectrum intensity change condition. The device has the advantages of high sensitivity, wide detection range, low detection limit, reusability, electromagnetic interference resistance and small size.

The invention discloses a method for optically realizing a restricted Boltzmann machine. According to the invention, analog calculation of the restricted Boltzmann machine and optical Gibbs sampling can be realized, and the system has the advantages of wide application range, fast information transmission, simple structure, low cost, fast calculation and the like. According to the invention, a coherent wide-spectrum light source is used as signal input, a light field is subjected to light splitting by using a light splitting device such as a grating and then enters a modulator, then spinning, interaction and magnetic field parameters are coded on light wavefront at different positions through a time or space light modulator, and optical Fourier transform is carried out by using a time or space lens system, so that the optical field is obtained. The light intensity after Fourier transform is measured through the detector, and finally the difference between the light intensity measured twice is calculated, so that optical Gibbs sampling is realized, the calculation complexity is reduced, and the calculation efficiency is improved. The method provided by the invention has important application prospects in the fields of optical neural networks and the like, can realize applications of content generation, classification and identification and the like, and is convenient to integrate in optical chips and the like.

Various examples of a closed-loop optical gyroscope are disclosed. The closed-loop optical gyroscope includes a broadband light source configured to generate broadband optical signal(s). The broadband optical signal(s) propagate in an optical resonator and are coupled in and out of the optical resonator by optical couplers. A phase modulator applies phase modulation to the optical signal(s) based on a sawtooth modulation signal. The optical signal(s) repropagate in the optical resonator in a different direction. The optical signal(s) are then received and analyzed to determine parameter(s) of the phase modulator. One or more processors configure the phase modulator based on the determined parameter(s).

The utility model provides a kind of F-P interference microfluid sensing detection device of full-suspension core optical fiber integration, including wideband light source and the coupler of signal connection, coupler is signal connected to No. one circulator and No. two circulators respectively, No. two circulators are also signal connected to No. two spectrometer and fan in fan out module respectively;No. one circulator is signal connected to No. one spectrometer and fan in fan out module respectively, the output end signal connection of fan in fan out module is used to pass through the F-P interference microfluid cavity structure of light beam and liquid to be measured, the F-P interference microfluid cavity structure is equipped with two liquid inlets and two liquid outlets, and each liquid inlet is communicated with a liquid outlet to form micropore channel, each liquid inlet is connected with a microfluid pump pipeline, and each liquid outlet is connected with a waste liquid pool pipeline.The utility model structure is highly integrated, can detect two kinds of liquid in parallel, improve work efficiency, the micropore channel of the setting of double-hole optical fiber, so that the amount of sample to be measured is very little to complete test.

There is described a system and method for measuring properties of water, such as surface water at site. That site may be in an agricultural setting. The properties of water, such as surface water may include nitrates and / or dissolved organic carbons. An example system may comprise a light source configured to emit a broadband source signal comprising a particular bandwidth for use in measuring a range of particular properties of water as well as an optical device configure to split the source signal into a measurement signal, and a corresponding reference signal. The system may also comprise a sensor unit configured to communicate a measurement signal through water at the sensor unit (e.g., when located in a stream), and a spectrometer configured to receive both a measurement signal having been communicated through water at the sensor unit and a reference signal from the optical device. Such a spectrometer may be configured to separate received measurement signals and reference signals into common component wavelengths, those common component wavelengths being associated with expected properties of water; and the system may be further configured to use respective component wavelengths of a measurement signal together with those of a reference signal to determine one or more particular properties of measured water.

This invention discloses a single-light-source composite sensor, comprising a housing with an air inlet and an air outlet, a control circuit board disposed within the housing, and a broadband light source, an infrared detector, and a photodetector disposed on the control circuit board. An inclined first filter is positioned in front of the broadband light source. This invention employs a broadband light source capable of emitting different wavelengths as a common light source, and places a first filter in front of the broadband light source. The first filter selectively reflects and transmits the light emitted by the broadband light source, selecting appropriate wavelengths for the detection of particulate matter and gases. This invention effectively reduces the size of the composite sensor and lowers power consumption.

To provide a chromatic confocal measuring device that uses an efficient and long-lifetime broadband light source.SOLUTION: There is provided a chromatic confocal measuring device in which a beam path for imaging of a pump light source (1) onto a luminophore (5), and a beam path for imaging of the luminophore (5) onto a surface (8a) of a fiber or fiber bundle partially match each other. The measuring device comprises a dichroic beam splitter (3) arranged so as to separate the beam path for imaging of the luminophore (5) onto the end (8a) of the fiber or fiber bundle from the beam path for imaging of the pump light source (1) onto the luminophore (5).SELECTED DRAWING: Figure 1

The application relates to the technical field of micro-nano optics and high-precision thin film thickness measurement, and discloses a resolution-optimized thin film thickness measurement method and system based on a metasurface, to solve the problem that the existing thin film thickness measurement method cannot realize non-contact and high resolution. The system comprises a broadband light source, a composite metasurface measurement probe, a spectrometer and a data processing unit. The composite metasurface measurement probe comprises a composite metasurface, the composite metasurface comprises a multilayer step flat lens and a single-layer metasurface, the single-layer metasurface is composed of a transparent glass substrate and a micro-nano structure array constructed above the transparent glass substrate, and the flat lens is connected with the transparent glass substrate of the single-layer metasurface. The composite metasurface is used for receiving and phase-controlling incident light of different wavelengths. The spectrometer is used for recording the light intensity distribution of reflected light changing with wavelengths, and obtaining a reflected spectrum signal. The data processing unit is used for calculating the thin film thickness according to the reflected spectrum signal. The system can improve the precision of thin film thickness measurement.

The invention provides a high-transparency Yb-doped yttrium gallium garnet laser ceramic and a preparation method thereof, the ceramic component is (YbxY1-x) 3Ga5O12 (0.001 < = x < = 0.2), raw material powder is prepared through coprecipitation and then formed, and oxygen presintering and hot isostatic pressing sintering are combined to prepare the high-transparency Yb-doped yttrium gallium garnet laser ceramic. The technical scheme provided by the invention has the advantages of simple preparation process and low cost, and can be applied to the fields of ultrashort pulse laser and broadband light sources.

The invention discloses an acetylene optical fiber photoacoustic detection system based on a π-shaped cantilever beam and an application thereof, and relates to the technical field of acetylene gas detection in transformer oil. The detection system comprises a photoacoustic cell; a π-shaped cantilever beam arranged in the photoacoustic cell, with one end of the π-shaped cantilever beam fixed and the other end combined with a single-mode optical fiber to form an F-P cavity; a semiconductor laser for irradiating the gas to be detected entering the photoacoustic cell; an SLED detection light source tube, which is a broadband light source, for coupling the emitted broadband light into the F-P cavity through a single-mode optical fiber and an optical fiber circulator to generate an interference spectrum; a spectrometer for collecting the interference spectrum; a data collection and control circuit module for transmitting the interference spectrum data collected by the spectrometer to a data analysis and computer module; and the data analysis and computer module for analyzing the change in the length of the F-P cavity and obtaining the acetylene concentration after calibration. The π-shaped cantilever beam of the invention exhibits extremely high sensitivity when detecting trace acetylene gas.

The application provides a visible light band optical fiber SPR liquid refractive index linear measurement device and method, the device comprises a broadband light source, a first lens and a second lens, a polarizer, a third lens and a fourth lens, a pinhole, a fifth lens, an optical fiber SPR, a sixth lens, a diffraction grating, a concave mirror, a linear array CCD and a data processing unit; the data processing unit is used for extracting the resonance wavelength corresponding to the normalized light intensity minimum value from the wavelength-intensity spectrum curve, and calculating the refractive index of the liquid medium to be measured according to the linear relationship between the refractive index and the resonance wavelength which is calibrated in advance. The device is not only intuitive in optical path debugging and easy to operate, but also has a rigorous theoretical model and high measurement precision, and is very suitable for rapid and accurate refractive index screening and analysis of a large number of low-concentration liquid samples, and has wide application prospect and industrial value.