118 results about "Transmittance spectra" patented technology

The invention belongs to the technical field of all-dielectric metamaterial optical devices and machine learning, and discloses an all-dielectric metasurface target spectral response reverse design method based on deep learning. And realizing efficient prediction of the transmission spectrum by using a convolutional neural network-recurrent neural network-residual network architecture. A fitness function is designed, and a machinable structure is generated by aiming at single-peak and multi-peak target wavelength optimization and combining a linear and shape optimization strategy. The method breaks through the limitation of spectrum dependence and fixed structure type of the traditional reverse design, realizes on-demand design, and remarkably improves the design efficiency and processing compatibility of the integrated photonic device.

A light absorber 10 has a transmission spectrum satisfying the following requirements (I), (II), (III), (IV), and (V) at an incident angle of 0°. The light absorber 10 has a haze less than 0.20%. (I) An average transmittance TA0deg(460-600) is 75% or more. (II) A shorter cut-off wavelength λH0deg(s) is in a range of 390 nm to 450 nm. (III) A longer cut-off wavelength λH0deg(L) is in a range of 600 nm to 680 nm. (IV) An average TA0deg(300-380) is 1.2% or less. (V) An average TA0deg(750-1000) is 1.2% or less.

The invention relates to a partial discharge detection system based on Rydberg atoms in the field of partial discharge detection of electrical equipment, the system comprises an optical path frequency stabilization module, an atom probe, a photoelectric detection module, a controller module and a power frequency synchronous trigger signal circuit, the optical path frequency stabilization module locks 852.35 nm probe light and pump light frequency less than 509.53 nm through SAS and EIT technologies, and the atomic probe is used for detecting the frequency of the probe light. Inducing transition from a cesium atom ground state to a first excited state to a Rydberg state; under the effect of partial discharge pulse, the atomic probe outputs a modulated EIT transmission spectrum signal, after photoelectric conversion and filtering, the controller module analyzes the amplitude and phase information of the pulse in combination with a power frequency synchronizing signal, the upper computer generates a PRPD diagram to analyze the discharge correlation, the detection sensitivity of the system reaches-50dBm, the frequency band of 300MHz-2GHz is covered, the dynamic range is greater than or equal to 50dB, the equivalent height is greater than or equal to 20mm, and the discharge correlation is greater than or equal to 20mm. Broadband and high-resolution detection is achieved, the problem of phase synchronization is solved, and the device is suitable for high-voltage environment on-line monitoring.

The invention provides an active regulation and control device for a microwave resonant cavity based on Rydberg atoms. The microwave resonant cavity comprises a protective shell, an atomic gas chamber and a photoelectric detector, the active regulation and control device comprises a PID control module and piezoelectric ceramics, the PID control module is used for processing a received EIT transmission spectrum signal after generating a modulation signal to carry out atomic resonant frequency scanning on the atomic gas chamber, obtaining a target resonant frequency through a current feedback zero crossing point corresponding to an EIT transmission spectrum valley bottom value, and generating a deviation correction signal; and the piezoelectric ceramic is used for adjusting the length of a protective shell of the microwave resonant cavity according to the received correction signal, so that the atomic resonant frequency is locked as the target resonant frequency. The invention further provides an active regulation and control method for the microwave resonant cavity based on the Rydberg atoms. According to the invention, the resonant frequency of the microwave resonant cavity can be rectified in real time, and the optimal and most stable resonant mode of the local oscillation microwave frequency responding to atoms is kept.

The invention belongs to the technical field of light polarization analysis, and discloses a method for determining the sex of an embryo in an egg based on polarization image recognition. Comprising the following steps: acquiring a transmitted spectrum image sequence of a hatching egg to be detected at a plurality of polarization angles, wherein the transmitted spectrum image sequence covers a transmitted spectrum image from visible light to a near-infrared band; extracting a polarization sensitive wave band set of the embryonic tissue according to the polarization state change characteristics of the embryo area in the transmitted spectrum image at different polarization angles; constructing an embryo gender characteristic spectrum based on the polarization degree distribution difference and the spatial texture characteristics of each wave band in the polarization sensitive wave band set; determining an optimal wave band combination for sex determination by analyzing the relevance between a polarization anisotropy index of a specific wave band in the embryo sex characteristic spectrum and an embryo development stage; according to the polarization response mode corresponding to the optimal wave band combination, the sex of the embryo in the egg is judged, and the resource investment and the waiting cost are greatly reduced.

The invention discloses a film strength detection method and related equipment, and the method comprises the steps: carrying out the multi-angle broadband scanning sampling of the whole process of an incident light beam penetrating through a lens, recording the transmission light intensity, group phase and scattering power, and generating a reference transmission spectrum matrix; applying low-amplitude periodic ultrasonic vibration disturbance to the lens according to the reference matrix, synchronously obtaining a transmission spectrum time change curve, and performing time domain analysis to obtain a stress response characteristic matrix; determining a detection path by integrating the two matrixes, performing incremental load scratch disturbance along the path, recording data of transmission light intensity and scattering power changing along with the load in real time, and forming a critical damage response data set; performing fine grid transmission light scanning on the scratch and the neighborhood, acquiring multi-angle scattering distribution, and constructing optical characteristic distribution data; and performing multi-dimensional analysis on the data, and outputting a result. According to the scheme, early-stage accurate identification and evaluation of microcracks in a lens film layer and interface hidden defects are realized, and the use reliability of the lens is improved.

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 relates to the technical field of new material detection, in particular to a touch screen production fault detection method based on data feedback, which comprises the following steps of: arranging a transmission spectrum detection device on a flexible touch screen roll-to-roll production line, and continuously monitoring a plurality of layers of films by adopting a U-shaped light path structure to obtain multi-wavelength transmission spectrum data; based on an optical absorption model of each thin film layer, chromatography decoupling operation is carried out on the multi-wavelength transmission spectrum data, and a target spectrum is separated; according to the film temperature monitored in real time, combining a preset material temperature optical constant database and setting a reference light path to carry out temperature compensation and baseline correction on the target spectrum; establishing a silver nanowire agglomeration spectrum model, performing second derivative calculation on the target spectrum after baseline correction, identifying spectrum characteristic peaks, and evaluating the agglomeration degree of the silver nanowires; and judging the degradation defect of the conductive network based on the agglomeration degree of the silver nanowires to obtain a defect detection result, and adjusting process parameters.

To provide an optical filter advantageous for exhibiting desired transmissivity characteristics even without comprising a near infrared ray reflection film.SOLUTION: An optical filter 1a comprises a first light absorber 11 and a second light absorber 12. The first light absorber 11 contains an organic dye. The second light absorber 12 contains a copper component, and absorbs at least part of infrared rays. The optical filter exhibits a first transmission spectrum satisfying the following conditions: (I) an average value TA450-600 of a transmissivity in a wavelength range of 450 nm to 600 nm is 76% or more; (II) a first cutoff wavelength λF falls in a range of 360 nm to 450 nm; (III) a second cutoff wavelength λS falls in a range of 600 nm to 700 nm; and (IV) a maximum value TM700-750 of a transmissivity in a wavelength range of 700 nm to 750 nm is 5% or less.SELECTED DRAWING: Figure 1

The invention relates to the field of microcavity photonics and the technical field of control, and provides a temperature locking method and device based on an optical microcavity absorption peak position, and the method comprises the steps: employing a tunable laser to output continuous light, and obtaining a transmission spectrum power curve; manually adjusting the output wavelength of the tunable laser, and recording the wavelength interval as a rough absorption peak position when a wave band with significantly reduced transmission spectrum power is detected; automatically adjusting the output wavelength of the tunable laser, and continuously scanning in the rough wavelength interval of the absorption peak position to obtain the absorption peak position; the offset between the position of the absorption peak and the position of a target absorption peak of the optical microcavity in a natural room temperature state is calculated, and the detected position of the absorption peak is stably maintained at the position of the target absorption peak by automatically heating or refrigerating the optical microcavity. Through the method, the problems of heat conduction path delay and thermal field gradient between the microcavity and the sensor are avoided, and the response speed and precision of wavelength drift compensation are improved.

A kind of water environment cadmium ion and temperature double parameter optical fiber chemical sensing system relates to water body environment detection field.In the above system, spontaneous emission light source is near infrared light source;The surface of optical fiber sensing unit is coated with magnetic MOF-cadmium ion imprinted polymer;The light signal generated by spontaneous emission light source enters optical fiber sensing unit, optical spectrometer collects the transmission spectrum signal of optical fiber sensing unit, and the collected spectrum data are output to photoelectric detection module;Photoelectric detection module converts light signal into electrical signal and transmits to demodulation module;Demodulation module gives the cadmium ion concentration and temperature according to input signal using machine learning algorithm.The present application has higher specific recognition ability to cadmium ion, and can effectively separate the coupling influence of cadmium ion concentration and temperature on sensing signal.

The present invention discloses a chlorophyll hyperspectral inversion method based on a curled plant leaf radiation transmission model. The method is as follows: 1. For the curled leaf to be measured, the hemispherical reflectance spectrum DHR and the hemispherical transmission spectrum DHT are measured. The three-dimensional point cloud data of the curled leaf is collected. 2. The leaf structure parameters, leaf surface roughness, leaf average refractive index and leaf chlorophyll absorption coefficient of the curled leaf are obtained. 3. Based on the three-dimensional point cloud data, the spatial geometric model of the curled leaf is obtained. 4. The spatial geometric model of the curled leaf is spectrally simulated. 5. Chlorophyll concentration is inverted. The present invention takes into account the influence of the spatial morphology of the curled leaf on the multi-angle spectral simulation and the chlorophyll hyperspectral inversion results, improves the accuracy of chlorophyll inversion, and can obtain a high-precision canopy radiation transmission model based on this.

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 application discloses a method for measuring optical constants of transparent solid based on a layered sample transmission spectrum analysis method, and belongs to the fields of spectroscopy and optical measurement. The principle of the application is that: layering flat sample materials with the same thickness, measuring the transmittance of two layered combination samples, deriving the transmittance t and reflectance r of light vertically through a single layer sample with a thickness of L through algebraic operation, then obtaining the attenuation factor y and the interface reflectance R through an analytical method, and further obtaining the extinction coefficient k and the refractive index n of the sample, so as to realize the measurement of the optical constants of the transparent solid. The application solves the problem of inconsistent conditions of measuring the reflection and transmission spectrum of the single layer sample in the prior art, and also solves the iteration error and the time-consuming calculation problem existing in the layered sample transmission spectrum inversion method, and greatly simplifies the experimental measurement and solving calculation process.

A filter array includes filters disposed in a two-dimensional plane and having different transmission spectra. The filters include a first filter with a transmission spectrum having a first peak group including first and second peaks adjacent to each other, and at least one second filter with a transmission spectrum having a second peak group including third and fourth peaks adjacent to each other. Of peaks included in the second peak group, the third peak has a wavelength closest to a wavelength at the first peak. A first interval between the wavelength at the first peak and a wavelength at the second peak is different from a second interval between the wavelength at the third peak and a wavelength at the fourth peak. ΔFSR / σ≥0.25, where ΔFSR denotes an absolute value of a difference between the first and second intervals and σ denotes a half-width of the first peak.

The invention relates to an ophthalmic article (1), in particular for sunglasses, comprising at least one substrate (9) and a photochromic filter compound (15), the ophthalmic article (1) having a first transmission spectrum in an activated state of the photochromic filter compound (15) and a second transmission spectrum in a deactivated state of the photochromic filter compound, such that: ⋅—the first and the second transmission spectra at wavelengths lower than 380 nm is lower than 1%, ⋅—the first and the second transmission spectra have a relative first maximum between 460 nm and 510 nm, ⋅—the first and the second transmission spectrum have a relative first minimum between 560 nm and 610 nm, and where ⋅—Tvactivated is the luminous transmittance according to ISO_13666 in the activated state of the photochromic filter compound. ⋅—Tvdeactivated is the luminous transmittance according to ISO_13666 in the deactivated state of the photochromic filter compound. ⋅The lens has a reduced transmission in the blue between 400 and 450 nm and a reduced transmission around 585 nm. The lens provides a good contrast and reduces glare.TvdeactivatedTvactivated>2.5TvactivatedTνdeactivated

The invention belongs to the technical field of optical thin films, display imaging and holographic storage, and particularly discloses a chalcogenide phase-change material-based dynamic programmable narrow-band optical filter, a first Bragg reflector, a middle spacing layer and a second Bragg reflector form a Fabry-Perot resonant cavity, the resonant wavelength of the Fabry-Perot resonant cavity is determined by the optical thickness of each thin film, and the thickness of the Fabry-Perot resonant cavity is smaller than that of each thin film. The optical filter is used for outputting different transmission spectrums by changing the central wavelength of filtered light; the chalcogenide phase change material layer is used for realizing on-off and gray scale adjustment of a transmitted spectrum through a phase change process from an amorphous state to a crystalline state; and the top anti-reflection layer is a third transparent dielectric layer, and is used for anti-reflection of the transmitted spectrum and preventing oxidation of the chalcogenide phase change material. According to the invention, excellent narrowband filtering characteristics and high color saturation are realized, and high switch contrast is realized by using significant difference of extinction coefficients before and after phase change of the phase change material.

The invention relates to the field of agricultural information, and discloses a crop light energy capturing capability determination method and system based on spectral analysis under canopy, a medium and equipment, and the method comprises the following steps: collecting a direct solar radiation spectrum and a transmission spectrum under the canopy of a crop in a space-time synchronization mode; preprocessing the collected spectral data, analyzing and determining the light energy capturing capability of the crop canopy, and performing accurate quantitative evaluation on the photosynthetic capability of the crop through the light energy capturing capability. According to the invention, the limitation of traditional single-point acquisition can be broken through, and non-destructive and real-time photosynthetic potential monitoring is realized.

The present application relates to the technical field of perovskite photoelectric devices and flat plate optical waveguide, and particularly relates to a method for monitoring the quality and uniformity of perovskite thin film. The method comprises: providing a device to be measured comprising at least a glass substrate and a perovskite layer; coupling light from a wide-spectrum light source into the glass substrate through a multimode optical fiber to excite a loss mode resonance (LMR) effect; collecting a transmission spectrum after a polarizer through a spectrometer; extracting the peak position, intensity and half-peak width of the LMR characteristic peak. The red shift of the peak position indicates thickness change, the intensity decay and the half-peak width broadening indicate quality decline. Multi-point scanning can evaluate uniformity. The present application does not require vacuum equipment, is non-destructive, fast, low-cost, can be integrated into the production line, and solves the problem that the existing detection method cannot meet the needs of large-scale production.

This invention relates to the field of thin film preparation, and discloses a method and system for preparing dimming films based on PET and liquid crystal. The method includes: first, acquiring the transmittance parameters of the PET substrate and the phase transition temperature data of the liquid crystal material; constructing an interlayer framework; forming an activated interface layer on the surface of the PET-liquid crystal composite through plasma treatment; coating a liquid crystal dispersion to obtain a pre-cured film; gradient curing based on its thickness distribution data using an ultraviolet light source to form a dimming functional layer; collecting the transmission spectrum curves of the dimming functional layer under different electric field intensities; calculating the duty cycle value of the liquid crystal molecules; configuring a transparent conductive electrode pattern accordingly; and topologically designing it as a uniquely controlled electrode array. Defect clusters are identified and repaired by calculating the electronic control adjustment value; the dimming attenuation parameters of the repaired film are analyzed; and finally, a PET-liquid crystal composite thin film preparation scheme is formulated. This invention can improve the preparation efficiency of dimming films.

To provide metal oxide fine particles capable of forming a metal oxide film having excellent heat shielding properties and visible light transmittance, and a metal oxide fine particle dispersion.SOLUTION: In a transmission spectrum measured when a dispersion liquid dispersed at a concentration of 0.7 mass% in a dispersion medium is placed in a 1 mm cell, a slope k1 obtained by linear approximation using the least squares method in a wavelength range from 290 nm to 330 nm is within a range of 0.90 or more and 1.60 or less. In a transmission spectrum measured when a dispersion liquid dispersed at a concentration of 0.7 mass% in a dispersion medium is placed in a 1 mm cell, a slope k2 obtained by linear approximation using the least squares method in a wavelength range from 310 nm to 330 nm is within a range of 0.95 or more and 2.30 or less.SELECTED DRAWING: None

A filter array has a plurality of filters arranged two-dimensionally and each having a different transmission spectrum. The plurality of filters includes a first filter having a transmission spectrum with a first peak group including a first peak and a second peak adjacent to each other, and at least one second filter having a transmission spectrum with a second peak group including a third peak and a fourth peak adjacent to each other, among the plurality of peaks included in the second peak group, the wavelength of the third peak is closest to the wavelength of the first peak. A first interval between the wavelength of the first peak and the wavelength of the second peak is different from a second interval between the wavelength of the third peak and the wavelength of the fourth peak. When an absolute value of a difference between the first interval and the second interval is ΔFSR, and a half-value width of the first peak is σ, ΔFSR / σ ≥ 0.25.

The present application provides an atmospheric environment monitoring and early warning system and method. By performing differential analysis on the transmission spectrum of the atmosphere, the spectral distribution of atmospheric pollutants at each monitoring site is obtained. The coupling characteristics of the atmospheric pollutants at each monitoring site in the spectral band are determined from the spectral distribution. Based on the coupling characteristics, the absorption contribution of the atmospheric pollutants at each monitoring site in the transmission spectrum is determined. The influence coefficient of each physical state on the diffusion of atmospheric pollutants is determined, and the diffusion gradient of atmospheric pollutants in the target area is determined based on all the influence coefficients. The atmospheric pollutant concentration in the target area is analyzed by fusion of all the absorption contributions and diffusion gradients to obtain a composite index of atmospheric environmental pollution in the target area. The composite index of atmospheric environmental pollution is sent to a monitoring and early warning center. The solution of the present application can realize the composite pollution assessment of the atmosphere in a complex atmospheric pollution environment to reduce the monitoring error of atmospheric environmental pollution.

The invention discloses an optical fiber-based sodium ion concentration detection method. A used device comprises a broadband light source, a single-mode optical fiber, a polarization controller, a flow cell, a TFBG-SPR sensor and a spectrum analyzer. Firstly, the broadband light source emits light with the wavelength range of 1420-1620 nm, the polarization state of the light is adjusted to a P state through the polarization controller, then the light is input into the TFBG / PVC / NPOE / Sodium ion III / MB ion selective membrane, and finally a spectrum is displayed on the spectrum analyzer. The Sodium ion phore III on the surface of the TFBG can be combined with sodium ion molecules to cause the change of the refractive index, the change is shown as the drifting of a transmission spectrum on a spectrum analyzer, and the rapid, accurate and trace detection of the sodium ion concentration is realized by comparing the relationship between the concentrations of different sodium ion solutions and the drifting of the transmission spectrum. The invention provides a novel method which is simple in structure, high in accuracy and quick in response for sodium ion concentration measurement, and has great application potential.

The application provides a kind of pulse signal positioning device based on Rydberg atom, including Rydberg atom preparation system, multiple Rydberg atom antennas, data acquisition module, signal processing module and positioning module, Rydberg atom preparation system is used to output frequency-locked detection light and coupling light;Multiple Rydberg atom antennas are all connected with Rydberg atom preparation system, generate EIT transmission spectrum signal and output;Data acquisition module is connected with multiple Rydberg atom antennas respectively, for outputting multiple original pulse sequence data;Signal processing module is connected with data acquisition module, for outputting multiple pulse sequence characteristics.Positioning module is connected with signal processing module, for calculating the position of pulse signal source.The application solves the technical problems of low sensitivity, narrow working frequency band and low positioning accuracy caused by the limitation of physical characteristics of electronic devices in traditional equipment.

The invention provides an electric field measurement method based on polymorphic Rydberg atoms, which comprises the following steps: two beams of detection light and two beams of coupling light with different frequencies oppositely enter two atom probes respectively, and atoms in the two atom probes are excited from a ground state to a Rydberg state, after initial EIT transmission peaks respectively appear on the transmission spectrum of the two beams of detection light, the two inner plate electrodes are used for generating an electric field and gradually increasing the electric field intensity, and EIT transmission spectrum data under different electric field intensities are output; performing data labeling and preprocessing on the EIT transmission spectrum data, and outputting spectrum data to be identified; and then, identifying the spectrum data to be identified, and outputting a judgment result of the electric field intensity in a regression manner. The problems that in an existing scheme, the strong field measurement accuracy and the electric field resolution are insufficient, and the measurement bandwidth is difficult to further improve are solved.

A combination structure includes an in-plane pattern of unit cells, where each unit cell includes a nanostructure and a light absorbing layer, each nanostructure having a size that is smaller than a near-infrared wavelength, the light absorbing layer being adjacent to the nanostructure and including a near-infrared absorbing material configured to absorb light in at least a portion of a near-infrared wavelength spectrum. The nanostructure defines a nanostructure array in the unit cell, and a wavelength width of a transmission spectrum of the combination structure in the near-infrared wavelength spectrum at 50% transmission is wider than a wavelength width of a transmission spectrum of the nanostructure array in the near-infrared wavelength spectrum at 50% transmission.

The invention discloses an optical fiber-based IgG protein concentration detection method. A used device comprises a broadband light source, a single-mode optical fiber, a polarization controller, a flow cell, a TFBG-SPR sensor and a spectrum analyzer. Firstly, light with the wavelength range of 1420-1620 nm is emitted by a broadband light source, the polarization state of the light is adjusted to a P state through a polarization controller, then the light is input into an AuNPs / 11-MAA / rabbit anti-human IgG modified sensing probe, and finally a spectrum is displayed on a spectrum analyzer. Rabbit anti-human IgG on the surface of the TFBG can be combined with human IgG to cause change of the refractive index, drifting of a transmission spectrum is shown on a spectrum analyzer, and rapid, accurate and trace detection of the IgG concentration is realized by comparing the relationship between the concentrations of different IgG solutions and the drifting of the transmission spectrum. The invention provides a novel method which is simple in structure, high in accuracy and quick in response for measuring the concentration of IgG, and has great application potential.

The invention discloses a trace lead ion concentration detection method based on a TFBG-SPR integrated MXene film. A used device comprises a broadband light source, a single-mode fiber, a polarization controller, a flow cell, a TFBG-SPR sensor and a spectrum analyzer. Firstly, a broadband light source emits light with the wavelength range of 1420-1620 nm, the polarization state of the light is adjusted to a P state through a polarization controller, an MXene functional film is deposited on the surface of a TFBG-SPR sensor and used for being combined with lead ions in a solution to be detected, and finally a spectrum is formed on a spectrum analyzer; the MXene functional film on the surface of the TFBG can be combined with the lead ions to cause the change of the refractive index, the change shows the drifting of the transmission spectrum on a spectrum analyzer, and the rapid, accurate and trace detection of the concentration of the lead ions in the water environment is realized by comparing the relationship between the concentrations of different lead ion solutions and the drifting of the transmission spectrum. The invention provides a novel method which is simple in structure, high in accuracy and quick in response for measuring the concentration of the lead ions, and has great application potential.

The invention belongs to the technical field of optical components, and particularly relates to a low-stress high-reflectivity optical composite film and a preparation method and application thereof. The method comprises the following steps: S1, respectively weighing a SiO evaporation material and a Ge evaporation material, putting the materials into an evaporation table, and vacuumizing; and S2, sequentially depositing SiO of # imgabs 0 #, Ge of # imgabs 1 #, SiO of # imgabs 2 #, Ge of # imgabs 3 #, SiO of # imgabs 4 # and Ge of # imgabs 5 # on the silicon wafer to obtain the optical composite film with low stress and high reflectivity. The prepared optical composite film can be used as a high-reflection film of a tunable F-P resonant cavity, and narrower transmission spectrum peak bandwidth and higher transmissivity are achieved.