A gui-based optical isolator parameter evaluation system and method

Abstract

The application discloses a kind of GUI-based optical isolator parameter evaluation system and method.The system includes GUI interaction module (1), parameter input module (2), core calculation module (3) and result output module (4);The method of the application includes the following steps: S1, select evaluation mode by GUI interaction module (1), S2, by parameter input module (2) input light splitting / combination crystal parameters, optical rotatory crystal parameters, target operating wavelength λ And test temperature range t， S3, core calculation module (3) starts operation, S4, result output module (4) shows parameter value and IL-wavelength relationship curve, IL-temperature relationship curve, IS-wavelength relationship curve, IS-temperature relationship curve, and supports data export and performance evaluation.The application relates to the technical field of optical device detection, especially to an intelligent research and development design and data processing system based on industrial internet technology, which serves the optical communication and laser manufacturing industry.

Description

Technical Field

[0001] This invention relates to the field of optical device technology, specifically to a GUI-based optical isolator parameter evaluation system and method, applicable to the design verification and performance evaluation of optical isolators in high-power lasers, capable of accurately calculating core parameters such as insertion loss and isolation. Particularly, it relates to an intelligent R&D design and data processing system based on Industrial Internet technology, serving the optical communication and laser manufacturing industries. Background Technology

[0002] With the rapid development of laser technology, optical isolators, as core passive components of lasers, directly affect the operational safety and stability of lasers. However, existing optical isolator technologies and parameter evaluation methods suffer from time-consuming evaluation processes. Current isolator parameter evaluations largely rely on manual calculations or experience-based judgments, resulting in large computational loads and low accuracy, failing to promptly address the diverse needs of current customer application scenarios.

[0003] Furthermore, under the current global trend of manufacturing transformation towards digitalization, networking, and intelligence, industrial internet technology system services and internet-based collaborative manufacturing platforms have become key infrastructure for enhancing the core competitiveness of industries. For optical isolators—core optical components of high-power lasers and other high-end equipment—their R&D process urgently needs to be integrated into this digital ecosystem. However, existing evaluation methods relying on manual calculations or experience-based judgments are not only inefficient but also fail to generate structured industrial production big data resources. This hinders their ability to connect with industrial artificial intelligence network systems for deep learning and performance prediction, severely restricting the construction of internet-based intelligent manufacturing service platforms in the optical component industry.

[0004] Therefore, developing a method for evaluating optical isolator parameters that can be quickly assessed and visualized has become a pressing technical problem in the field of optical devices. Summary of the Invention

[0005] The purpose of this invention is to overcome the aforementioned deficiencies of existing technologies and provide a GUI-based optical isolator parameter evaluation system and method. By integrating a complete Jones matrix model of polarizers, birefringent crystals, Faraday rotator crystals, and half-glass plates, the mathematical calculation relationships of each core parameter are clarified, achieving accurate and efficient evaluation of optical isolator parameters and simplifying the operation process. This invention is not only an independent evaluation tool but also a standardized SaaS (Software as a Service) application that can be embedded into the industrial internet infrastructure service system, providing powerful industrial data integration services and intelligent support for optical device R&D.

[0006] The technical solution adopted in this invention is a GUI-based optical isolator parameter evaluation system, which includes:

[0007] The GUI interaction module provides a visual operation interface, supporting switching between single-pole CORE mode and dual-pole CORE mode, parameter input, calculation triggering, and result display.

[0008] The parameter input module is connected to the GUI interaction module and is used to receive the parameters of the beam splitting / combining crystal, the parameters of the optical rotation crystal, the working wavelength λ, and the test temperature t.

[0009] The core calculation module, connected to the parameter input module, incorporates a Jones matrix model for optical materials and a light transmission matrix algorithm. The Jones matrix model includes, but is not limited to, the Jones matrix expressions for polarizers, birefringent crystals, Faraday rotator crystals, and half-glass plates. The light transmission matrix algorithm is constructed based on the optical path transmission characteristics of optical devices and is used to calculate the insertion loss IL, isolation IS, wavelength-dependent loss WDL, and temperature-dependent loss TDL of the optical isolator. The wavelength-dependent loss WDL is the difference between the maximum and minimum values ​​of IL at different wavelengths, and the temperature-dependent loss TDL is the difference between the maximum and minimum values ​​of IL at different temperatures.

[0010] The results output module, connected to the core calculation module, is used to output the correlation curves of IL to wavelength, IL to temperature, IS to wavelength, and IS to temperature, and supports data export.

[0011] Furthermore, in the core calculation module, the Jones matrix of the polarizer satisfies:

[0012] When the direction of vibration is parallel to the horizontal

[0013] ,

[0014] In the formula , , where L p E represents the polarizer insertion loss. p The extinction ratio of the polarizer;

[0015] When the direction of vibration makes an angle θ with the horizontal direction

[0016] ,

[0017] Among them, T θ For rotation matrix, .

[0018] Furthermore, in the core calculation module, a three-dimensional coordinate system is established with the vibration direction of the o-ray as the x-axis, the vibration direction of the e-ray as the y-axis, and the propagation direction as the Z-axis. The insertion loss of the birefringent crystal is set to L. wedge The extinction ratio is E wedgeThen the o-ray transmission matrix of the birefringent crystal is:

[0019] ,

[0020] The e-optical transmission matrix is:

[0021] ,

[0022] in , .

[0023] Furthermore, in the core calculation module, the Jones matrix of the Faraday rotator crystal is obtained by multiplying the polarization rotation component matrix F1 and the elliptic polarization component matrix F2, and then taking into account the insertion loss correction coefficient.

[0024] ,

[0025] Among them, l F For Faraday insertion loss, ,

[0026] , Φ F It is the rotation angle.

[0027] ,

[0028] e F For ellipticity, e F =10 -EF / 20 E F It is the Faraday extinction ratio; and M F Satisfy M F =T θ M F T -θ It is applied to incident light with arbitrary polarization.

[0029] Furthermore, in the core calculation module, the Jones matrix of the half-glass slide satisfies:

[0030] When establishing the sf coordinate system using the fast and slow axes,

[0031] ,

[0032] When transforming to the xy coordinate system of the incident light polarization state,

[0033] ,

[0034] in,

[0035] ,

[0036] ,

[0037] θ is the angle between the polarization state of the incident light and the optical axis of the half-glass slide.

[0038] Furthermore, when the core computing module calculates the parameters of a single-stage isolator, the oo polarization state transfer matrix for forward light transmission is:

[0039] ,

[0040] The polarization state transfer matrix of ee is

[0041] ,

[0042] in,

[0043] ,

[0044] ,

[0045] When the polarization state of the incident light after normalization is

[0046] ,

[0047] The output optical transmission matrix is ​​then...

[0048] ,

[0049] The insertion loss IL output by the result output module satisfies the formula:

[0050] Let the polarization state of the output light be

[0051] ,

[0052] but

[0053] ,

[0054] Where a and b are two complex components of the output light polarization state vector, i.e., the Jones vector.

[0055] A method for evaluating optical isolator parameters using the GUI-based optical isolator parameter evaluation system described above, the method comprising the following steps:

[0056] S1. Select the evaluation mode through the GUI interaction module. The evaluation mode includes single-polar CORE mode and dual-polar CORE mode.

[0057] S2. Input the spectroscopic / combining crystal parameters, optical rotation crystal parameters, target working wavelength λ, and test temperature range t through the parameter input module;

[0058] S3, the core computing module starts operation, specifically including:

[0059] S31. Based on the input parameters, calculate the optical rotation angle φ using the formula. F =45+K λ •(λ-1550)+K T • (t-23) Calculate the Faraday rotation angle φ F K λ K T These are Faraday's wavelength and temperature-dependent parameters, respectively.

[0060] S32. Construct the Jones matrix for polarizer, birefringent crystal, Faraday rotator crystal and half glass plate respectively according to the matrix expression;

[0061] S33. Based on the optical path transmission order, the Jones matrices of each optical device are multiplied to obtain the oo polarization state transmission matrix M1 and ee polarization state transmission matrix M2 of the single-stage isolator.

[0062] S34. Substitute the normalized incident light polarization state to calculate the output light transmission matrix and obtain IL;

[0063] S35. Test wavelengths and temperatures, calculate IL under different conditions, and then obtain WDL, TDL, and IS parameters, where IS is the isolation degree, satisfying IS = -10lg(P... back / P in ), P back To transmit optical power in the reverse direction, P in This represents the forward input optical power.

[0064] S4. The results output module displays parameter values ​​and IL-wavelength relationship curves, IL-temperature relationship curves, IS-wavelength relationship curves, and IS-temperature relationship curves, and supports data export and performance evaluation.

[0065] Further, in step S2, the test temperature range is -5℃ to 75℃, and the target working wavelength range is 1545nm to 1605nm; in step S3, the polarization state θ of the incident light ranges from 0° to 90°, and after normalization, |cosθ| 2 +|sinθ| 2 =1.

[0066] Furthermore, in step S4, the exported data format supports a general text format and includes specific values ​​of IL, IS, WDL, and TDL at each wavelength and temperature.

[0067] The present invention has the following beneficial effects:

[0068] 1. Significantly improved evaluation accuracy: The core calculation module integrates a complete Jones matrix model of optical devices, clarifying the quantitative calculation relationship of parameters such as optical rotation angle and loss coefficient, avoiding prediction errors caused by incomplete models in existing technologies; at the same time, the calculation of core parameters such as insertion loss and isolation is based on strict matrix optics principles, ensuring the scientific nature and reliability of the results.

[0069] 2. Simplified operation process and integrated design: The visual interface design based on Matlab GUI allows operators to complete the evaluation by simply inputting basic parameters without needing to master complex matrix operations, improving operation efficiency by more than 100 times; at the same time, the system's digital evaluation method replaces the traditional complex physical testing device, which helps to miniaturize and integrate the optical isolator design and meet the compact requirements of high-power lasers.

[0070] 3. Empowering Industrial Digital and Intelligent Transformation: This invention encapsulates complex optical theoretical models into user-friendly digital services, representing a typical extension of industrial IoT information sensing and perception technology services in the R&D and design phase. It establishes a data link from physical devices to digital models, generating standardized, high-quality data streams that provide a solid foundation for upper-level industrial information and data processing, as well as industrial artificial intelligence applications. This effectively promotes the digitalization, networking, and intelligentization of the optical device industry's R&D system, aligning with the national strategic emerging industries development direction. Attached Figure Description

[0071] Figure 1 This is a simplified structural diagram of the system of the present invention;

[0072] Figure 2 This is a simplified schematic diagram of a single-pole isolator core;

[0073] Figure 3 This is a curve showing the relationship between the insertion loss and wavelength of a single-pole isolator output by the system of this invention;

[0074] Figure 4 This is a curve showing the relationship between the isolation degree of the single-pole isolator and the wavelength, output by the system of this invention.

[0075] Figure 5 This is a screenshot of the interface when the system of this invention starts up;

[0076] Figure 6 This is a screenshot of the interface after the calculation and output results of this invention. Detailed Implementation

[0077] like Figures 1-6 As shown, a GUI-based optical isolator parameter evaluation system includes:

[0078] GUI interaction module 1 is used to provide a visual operation interface, supporting the switching between single-pole CORE mode and dual-pole CORE mode, parameter input, calculation triggering and result display;

[0079] The parameter input module 2 is connected to the GUI interaction module 1 and is used to receive the parameters of the beam splitting / combining crystal, the parameters of the optical rotation crystal, the working wavelength λ, and the test temperature t.

[0080] The core calculation module 3 is connected to the parameter input module 2. It has a built-in Jones matrix model and light transmission matrix algorithm for optical materials. The Jones matrix model includes, but is not limited to, the Jones matrix expressions for polarizers, birefringent crystals, Faraday rotator crystals and half-glass plates. The light transmission matrix algorithm is built based on the optical path transmission characteristics of optical devices and is used to calculate the insertion loss IL, isolation IS, wavelength-dependent loss WDL and temperature-dependent loss TDL of the optical isolator. The wavelength-dependent loss WDL is the difference between the maximum and minimum values ​​of IL at different wavelengths, and the temperature-dependent loss TDL is the difference between the maximum and minimum values ​​of IL at different temperatures.

[0081] The result output module 4 is connected to the core calculation module 3 and is used to output the correlation curves of IL to wavelength, IL to temperature, IS to wavelength, and IS to temperature, and supports data export.

[0082] Specifically, in the core calculation module 3, the Jones matrix of the polarizer satisfies:

[0083] When the direction of vibration is parallel to the horizontal

[0084] ,

[0085] In the formula , , where L p E represents the polarizer insertion loss. p The extinction ratio of the polarizer;

[0086] When the direction of vibration makes an angle θ with the horizontal direction

[0087] ,

[0088] Among them, T θ For rotation matrix, .

[0089] In the core calculation module 3, a three-dimensional coordinate system is established with the vibration direction of the o-ray as the x-axis, the vibration direction of the e-ray as the y-axis, and the propagation direction as the Z-axis. The insertion loss of the birefringent crystal is set to L. wedge The extinction ratio is E wedgeThen the o-ray transmission matrix of the birefringent crystal is:

[0090] ,

[0091] The e-optical transmission matrix is:

[0092] ,

[0093] in , .

[0094] In the core calculation module 3, the Jones matrix of the Faraday rotator crystal is obtained by multiplying the polarization rotation component matrix F1 and the elliptic polarization component matrix F2, and then taking into account the insertion loss correction coefficient.

[0095] ,

[0096] Among them, l F For Faraday insertion loss, ,

[0097] , Φ F It is the rotation angle.

[0098] ,

[0099] e F For ellipticity, e F =10 -EF / 20 E F It is the Faraday extinction ratio; and M F Satisfy M F =T θ M F T -θ It is applied to incident light with arbitrary polarization.

[0100] In the core calculation module 3, the Jones matrix of the half-glass slide satisfies:

[0101] When establishing the sf coordinate system using the fast and slow axes,

[0102] ,

[0103] When transforming to the xy coordinate system of the incident light polarization state,

[0104] ,

[0105] in,

[0106] ,

[0107] ,

[0108] θ is the angle between the polarization state of the incident light and the optical axis of the half-glass slide.

[0109] When the core computing module 3 calculates the parameters of the single-stage isolator, the polarization state transmission matrix of the forward light transmission is:

[0110] ,

[0111] The polarization state transfer matrix of ee is

[0112] ,

[0113] in,

[0114] ,

[0115] ,

[0116] When the polarization state of the incident light after normalization is

[0117] ,

[0118] The output optical transmission matrix is ​​then...

[0119] ,

[0120] The insertion loss IL output by the result output module 4 satisfies the formula:

[0121] Let the polarization state of the output light be

[0122] ,

[0123] but

[0124] ,

[0125] Where a and b are two complex components of the output light polarization state vector, i.e., the Jones vector.

[0126] The method for evaluating optical isolator parameters using the GUI-based optical isolator parameter evaluation system described above includes the following steps:

[0127] S1. Select the evaluation mode through the GUI interaction module 1. The evaluation mode includes single-polar CORE mode and bipolar CORE mode.

[0128] S2. Input the splitting / combining crystal parameters (L) through parameter input module 2. wedge E wedge Optical crystal parameters (K) λ K T L F EF ), target operating wavelength λ and test temperature range t;

[0129] S3, the core computing module 3, begins operation, specifically including:

[0130] S31. Based on the input parameters, calculate the optical rotation angle φ using the formula. F =45+K λ •(λ-1550)+K T • (t-23) Calculate the Faraday rotation angle φ F K λ K T These are Faraday's wavelength and temperature-dependent parameters, respectively.

[0131] S32. Construct the Jones matrix for polarizer, birefringent crystal, Faraday rotator crystal and half glass plate respectively according to the matrix expression;

[0132] S33. Based on the optical path transmission order, the Jones matrices of each optical device are multiplied to obtain the oo polarization state transmission matrix M1 and ee polarization state transmission matrix M2 of the single-stage isolator.

[0133] S34. Substitute the normalized incident light polarization state to calculate the output light transmission matrix and obtain IL;

[0134] S35. Test wavelengths and temperatures, calculate IL under different conditions, and then obtain WDL, TDL, and IS parameters, where IS is the isolation degree, satisfying IS = -10lg(P... back / P in ), P back To transmit optical power in the reverse direction, P in This represents the forward input optical power.

[0135] S4, Result Output Module 4 displays parameter values ​​and IL-wavelength relationship curves, IL-temperature relationship curves, IS-wavelength relationship curves, and IS-temperature relationship curves, and supports data export and performance evaluation.

[0136] Specifically, in step S2, the test temperature range is -5℃ to 75℃, and the target working wavelength range is 1545nm to 1605nm; in step S3, the polarization state θ of the incident light ranges from 0° to 90°, and after normalization, |cosθ| 2 +|sinθ| 2 =1. In step S4, the exported data supports a general text format and includes specific values ​​for IL, IS, WDL, and TDL at each wavelength and temperature.

[0137] The specific implementation method is as follows.

[0138] Take Faraday loss l F =0.05dB; Faraday extinction ratio E F =45dB; optical wedge loss L wedge =0.025dB; optical wedge extinction ratio E wedge =45dB, taking 1550nm Faraday as an example (the same applies to other wavelengths).

[0139] The following table lists the relevant Faraday specifications:

[0140]

[0141] Calculate the WDL and TDL parameters of a single-stage isolator at 1550±40nm and temperatures of -5, 23, and 75℃.

[0142]

[0143] At the same time, the IS parameters can be calculated.

[0144] With Faraday loss LF = 0.05dB; Faraday extinction ratio EF = 45dB; optical wedge loss Lwedge = 0.025dB; and optical wedge extinction ratio Ewedge = 45dB, the following results will be output.

[0145]

[0146] The IL and IS results are calculated based on the key test wavelengths and temperatures entered in the variable input. The IL and IS curves are curves showing the variation of IL / IS with temperature / wavelength at the test wavelength / temperature. The corresponding curve data can be exported using the "Export Data" button.

[0147] This invention is implemented using the Matlab GUI development tool. By integrating the calculation formulas (light transmission matrix) for the aforementioned CORE parameters, engineers only need to input the basic parameters of the CORE constituent materials (splitter / combiner crystals, optically active crystals) and the product's operating wavelength into the software. The software automatically calculates and outputs the CORE parameters and related charts at the product's operating wavelength. Engineers can then evaluate whether the product design meets customer requirements based on the software output results.

[0148] The system outputs of this invention, including core parameter values, performance curves, and a complete evaluation report, are all generated in a structured data format. This data can be directly imported into an enterprise's industrial cloud database service or dedicated industrial database, becoming a valuable knowledge asset for optical device design. The accumulated evaluation data can provide training samples for industrial artificial intelligence network systems, used to build performance prediction models for optical isolators, achieving a paradigm shift from "design-simulation-verification" to "intelligent recommendation-automatic optimization." Furthermore, this system can be deployed via a local area network (LAN) to provide collaborative design support for engineers from multiple departments, or integrated as a module into a larger internet-based collaborative manufacturing platform, enabling cross-regional and cross-team R&D collaboration and strongly supporting the intelligent needs of industrial LAN maintenance services and industrial network operation.

[0149] Finally, it should be emphasized that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A GUI-based optical isolator parameter evaluation system, characterized in that, The system includes: The GUI interaction module (1) is used to provide a visual operation interface, supporting the switching and selection of single-pole CORE mode and dual-pole CORE mode, parameter input, calculation triggering and result display; The parameter input module (2) is connected to the GUI interaction module (1) and is used to receive the spectroscopic / combining crystal parameters, optical rotation crystal parameters, working wavelength λ and test temperature t; The core calculation module (3) is connected to the parameter input module (2) and has a built-in Jones matrix model and light transmission matrix algorithm for optical materials. The Jones matrix model includes the Jones matrix expressions for polarizers, birefringent crystals, Faraday rotator crystals and half-glass plates. The light transmission matrix algorithm is built based on the optical path transmission characteristics of optical devices and is used to calculate the insertion loss IL, isolation IS, wavelength-dependent loss WDL and temperature-dependent loss TDL of the optical isolator. Among them, wavelength-dependent loss WDL is the difference between the maximum and minimum values ​​of IL at different wavelengths, and temperature-dependent loss TDL is the difference between the maximum and minimum values ​​of IL at different temperatures. The result output module (4) is connected to the core calculation module (3) and is used to output the correlation curve of IL to wavelength, the correlation curve of IL to temperature, the correlation curve of IS to wavelength, and the correlation curve of IS to temperature, and supports data export. When the core computing module (3) calculates the parameters of the single-stage isolator, the polarization state transmission matrix M1 of the forward light transmission is: ， The polarization state transfer matrix M2 is ， in, ， ， When the polarization state of the incident light after normalization is ， The output optical transmission matrix is ​​then... ， The insertion loss IL output by the result output module (4) satisfies the formula: Let the polarization state of the output light be ， but ， Among them, M F T is the Jones matrix of a Faraday-rotating crystal, θ is the angle between the polarization state of the incident light and the optical axis of the half-glass, and T is the angle between the polarization state of the incident light and the optical axis of the half-glass. θ Let be the rotation matrix, and a and b be the two complex components of the output light polarization state vector, i.e., the Jones vector.

2. The system according to claim 1, characterized in that, In the core calculation module (3), the Jones matrix M of the polarizer P satisfy: When the direction of vibration is parallel to the horizontal ， In the formula , , where L p E represents the polarizer insertion loss. p The extinction ratio of the polarizer; When the direction of vibration makes an angle θ with the horizontal direction ， Among them, T θ Let be a rotation matrix. .

3. The system according to claim 2, characterized in that, In the core calculation module (3), a three-dimensional coordinate system is established with the vibration direction of the o-ray as the x-axis, the vibration direction of the e-ray as the y-axis, and the propagation direction as the Z-axis. The insertion loss of the birefringent crystal is set to L. wedge The extinction ratio is E wedge Then the o-ray transmission matrix M0 of the birefringent crystal is: ， e-optical transmission matrix M e for: ， in , .

4. The system according to claim 3, characterized in that, In the core computing module (3), the Jones matrix M of the Faraday optical rotator crystal F The product of the polarization rotation component matrix F1 and the elliptic polarization component matrix F2 is then used to account for the insertion loss correction factor l. F To obtain, that is ， in, L F For optically active crystal parameters, Φ F It is the rotation angle. ， e F For ellipticity, E F It is the Faraday extinction ratio; and M F Satisfy M F =T θ M F T -θ It is applied to incident light with arbitrary polarization.

5. The system according to claim 4, characterized in that, In the core calculation module (3), the Jones matrix of the half-glass slide satisfies: When establishing the sf coordinate system with the fast and slow axes, the Jones matrix M of the half-glass slide is... sf for ， When transformed to the xy coordinate system of the incident light polarization state, the Jones matrix M of the half-glass slide is: ， in, ， ， θ is the angle between the polarization state of the incident light and the optical axis of the half-glass slide.

6. A method for evaluating optical isolator parameters using the GUI-based optical isolator parameter evaluation system as described in any one of claims 1 to 5, characterized in that, The method includes the following steps: S1. Select the evaluation mode through the GUI interaction module (1), the evaluation mode includes single-polar CORE mode and double-polar CORE mode; S2. Input the spectroscopic / combining crystal parameters, optical rotation crystal parameters, target working wavelength λ and test temperature range t through the parameter input module (2); S3, the core computing module (3) starts the operation, specifically including: S31. Based on the input parameters, calculate the optical rotation angle φ using the formula. F =45+K λ •(λ-1550)+K T • (t-23) Calculate the Faraday rotation angle φ F K λ K T These are Faraday's wavelength and temperature-dependent parameters, respectively. S32. Construct the Jones matrix for polarizer, birefringent crystal, Faraday rotator crystal and half glass plate respectively according to the matrix expression; S33. Based on the optical path transmission order, the Jones matrices of each optical device are multiplied to obtain the oo polarization state transmission matrix M1 and ee polarization state transmission matrix M2 of the single-stage isolator. S34. Substitute the normalized incident light polarization state to calculate the output light transmission matrix and obtain IL; S35. Test wavelengths and temperatures, calculate IL under different conditions, and then obtain WDL, TDL, and IS parameters, where IS is the isolation degree, satisfying IS = -10lg(P... back / P in ), P back To transmit optical power in the reverse direction, P in This represents the forward input optical power. S4. The result output module (4) displays parameter values ​​and IL-wavelength relationship curves, IL-temperature relationship curves, IS-wavelength relationship curves, and IS-temperature relationship curves, and supports data export and performance evaluation.

7. The method according to claim 6, characterized in that, In step S2, the test temperature range is -5℃ to 75℃, and the target working wavelength range is 1545nm to 1605nm; in step S3, the polarization state θ of the incident light ranges from 0° to 90°, and after normalization, |cosθ| 2 +|sinθ| 2 =1.

8. The method according to claim 6, characterized in that, In step S4, the exported data supports a general text format and includes specific values ​​of IL, IS, WDL, and TDL at each wavelength and temperature.

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