Portable ultrahigh-temperature spectral brightness calibration system and method

Abstract

The invention discloses a portable ultrahigh-temperature spectral brightness calibration system and method, and belongs to the technical field of optical radiation measurement and calibration devices. According to the system, a halogen tungsten filament lamp with a densely-arranged filament structure is adopted as a core radiation source, and a light-emitting surface of the halogen tungsten filament lamp is imaged at a light outlet through a lens group to form a uniform small surface source. According to the system, components including the adjustable power supply module, the current monitoring unit and the high-speed chopper are integrated in a portable case, so that the color temperature of a light source is continuously adjustable in a range of 2000K to 3200K, and the system can work in a continuous light mode and a pulse light mode. According to the calibration method, system output is compared with an ultrahigh-temperature blackbody furnace standard source, and an accurate spectral radiance value is obtained through calculation based on the Planck's law of radiation. The technical problem that a traditional ultrahigh-temperature calibration system is heavy and not portable is solved, and the system has the advantages of being small in size, convenient to carry and easy and convenient to operate and is particularly suitable for field calibration of transient high-temperature measurement experiments such as shock compression.

Description

Technical Field

[0001] This invention relates to the field of optical radiation measurement and calibration devices, specifically to a convenient ultra-high temperature spectral brightness calibration system and method. Background Technology

[0002] In high-pressure physics research, radiation pyrometers are commonly used to measure the temperature of materials under impact compression conditions. During experiments, a standard light source with known spectral radiance or spectral irradiance is required to calibrate the relationship between the incident light signal intensity and the signal output amplitude of the radiation pyrometer system. However, calibration using a spectral irradiance standard source is susceptible to the influence of the spatial coupling factor of the pyrometer system during data processing, making it difficult to accurately measure the receiving angle and resulting in relatively poor temperature measurement accuracy. In contrast, calibration using a spectral radiance standard source is relatively simple and highly accurate; therefore, this method is often used to calibrate the radiation pyrometer system in impact temperature measurement experiments. However, due to the instantaneous and destructive nature of impact experiments, the radiation pyrometer system must be calibrated on-site for each impact temperature measurement. Especially in high-temperature experiments, traditional spectral radiance calibration systems such as ultra-high-temperature blackbody furnaces or tungsten ribbon lamps are bulky, have complex operating conditions, and are inconvenient to carry out on-site calibration. Therefore, the current spectral radiance calibration systems, due to their inconvenience for on-site calibration, hinder the conduct of impact temperature measurement experiments. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention aims to provide a convenient ultra-high temperature spectral brightness calibration system and method, which solves the technical problems of traditional ultra-high temperature calibration systems being bulky and inconvenient to carry. It has the advantages of small size, easy portability, and simple operation, and is particularly suitable for on-site calibration of transient high temperature measurement experiments such as impact compression.

[0004] To achieve the above objectives, the embodiments of this invention provide the following technical solutions:

[0005] This application provides a portable ultra-high temperature spectral brightness calibration system, including a halogen tungsten filament lamp, a lens group, an adjustable power supply module, a current monitoring unit, and a high-speed chopper. The halogen tungsten filament lamp, the lens group, and the high-speed chopper are arranged sequentially along the optical path. The adjustable power supply module supplies power to the halogen tungsten filament lamp and the high-speed chopper. The current monitoring unit is used to monitor the operating current of the halogen tungsten filament lamp. The halogen tungsten filament lamp, the adjustable power supply module, and the current monitoring unit are electrically connected to form a series circuit. The halogen tungsten filament lamp, the lens group, the adjustable power supply module, the current monitoring unit, and the high-speed chopper are all integrated and packaged in a portable instrument chassis, which has a light outlet.

[0006] Furthermore, the halogen tungsten filament lamp has a close-packed filament structure.

[0007] Furthermore, the lens group is used to image the light-emitting surface of the halogen tungsten filament lamp onto the light outlet to form a uniform surface light source.

[0008] Furthermore, the diameter of the surface light source is not less than 2 mm, and the radiation characteristics of the surface light source satisfy Planck's gray body radiation model.

[0009] Furthermore, the adjustable power supply module can independently and continuously adjust the operating current of the halogen tungsten filament lamp and the modulation frequency of the high-speed chopper.

[0010] Furthermore, a light-transmitting hole is formed on the blade of the high-speed chopper, and the size of the light-transmitting hole is configured to be larger than the receiving end face size of the external test probe.

[0011] Furthermore, by adjusting the operating current of the halogen tungsten filament lamp, the output spectral radiance of the calibration system is continuously adjustable, and the corresponding color temperature adjustment range covers 2000K to 3200K.

[0012] Accordingly, this application also provides a convenient method for calibrating ultra-high temperature spectral brightness, the calibration method comprising the following steps: S1, calibrating the spectrometer system using a calibrated ultra-high temperature blackbody furnace standard source, and obtaining the standard spectral intensity curve I of the ultra-high temperature blackbody furnace at a set temperature T. C (λ); S2. Under the same measurement conditions, use the spectrometer system to measure the output spectral intensity curve I(λ) of the calibration system under different operating currents; S3. Calculate the spectral radiance values ​​of the calibration system under different operating currents using a comparison method and based on Planck's radiation law, according to the first formula, which is expressed as: Where E(λ) is the spectral radiance value, in W·m. -2 ·sr -1 ·nm -1 C1 and C2 are the first and second radiation constants, respectively, with C1 = 1.191 * 10⁻⁶. -16 Wm 2 / Sr, C2 = 1.4388 * 10 -2 mK and λ are the spectral wavelengths, and T is the set temperature of the standard blackbody radiation source.

[0013] Furthermore, after calculating the spectral radiance value, the process further includes: performing data fitting on the spectral radiance curve based on the Planck gray body radiation model to determine the color temperature and emissivity of the output light source of the calibration system.

[0014] Furthermore, the calibration method is used to calibrate the radiation pyrometer, specifically including: aligning the test probe of the radiation pyrometer with the light outlet of the system, and ensuring that the surface light source formed at the light outlet completely fills the field of view of the test probe.

[0015] The beneficial effects of this invention are as follows: By integrating the halogen tungsten filament lamp, lens group, adjustable power supply module, current monitoring unit and high-speed chopper into a portable instrument chassis, the system is integrated, greatly improving portability and facilitating rapid on-site calibration; the current monitoring unit controls the operating current of the halogen tungsten filament lamp in real time, ensuring the stability of the light source and improving the accuracy of calibration results; the integration of each component along the optical path into the chassis simplifies the optical path calibration process and enhances the ease of use of the system. Attached Figure Description

[0016] Figure 1 This application provides a schematic diagram of the structure of a convenient ultra-high temperature spectral brightness calibration system.

[0017] Figure 2 This application provides a flowchart illustrating a convenient ultra-high temperature spectral brightness calibration method.

[0018] Attached reference numerals: 1-Halogen tungsten filament lamp, 2-Lens group, 3-Adjustable power supply module, 4-Current monitoring unit, 5-High-speed chopper, 6-Light output port, 7-Portable instrument chassis, 8-Test probe, 9-Radiation pyrometer. Detailed Implementation

[0019] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0020] In this invention, the terms "system" and "network" are used interchangeably. "Multiple" refers to two or more; therefore, in this invention, "multiple" can also be understood as "at least two." "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Additionally, the character " / ", unless otherwise specified, generally indicates that the preceding and following related objects have an "or" relationship. Furthermore, it should be understood that in the description of this invention, terms such as "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or order.

[0021] Example 1

[0022] Traditional ultra-high temperature spectral radiance calibration equipment is large-scale and fixed in layout. The dispersed components make optical path calibration cumbersome. In addition, there is no real-time current monitoring, the working status of the light source is unstable, and the portability is lacking, making it unsuitable for rapid on-site calibration scenarios.

[0023] like Figure 1 As shown in the figure, this application provides a portable ultra-high temperature spectral brightness calibration system, including a halogen tungsten filament lamp 1, a lens group 2, an adjustable power supply module 3, a current monitoring unit 4, and a high-speed chopper 5. The halogen tungsten filament lamp 1, the lens group 2, and the high-speed chopper 5 are arranged sequentially along the optical path. The adjustable power supply module 3 supplies power to the halogen tungsten filament lamp 1 and the high-speed chopper 5. The current monitoring unit 4 is used to monitor the operating current of the halogen tungsten filament lamp 1. The halogen tungsten filament lamp 1, the adjustable power supply module 3, and the current monitoring unit 4 are electrically connected to form a series circuit. The halogen tungsten filament lamp 1, the lens group 2, the adjustable power supply module 3, the current monitoring unit 4, and the high-speed chopper 5 are all integrated and packaged in a portable instrument chassis 7. The portable instrument chassis 7 is provided with a light outlet 6.

[0024] In another possible embodiment, the halogen tungsten filament lamp 1, lens group 2, adjustable power supply module 3, current monitoring unit 4, and high-speed chopper 5 are first installed into the portable instrument chassis in the optical path sequence, ensuring that the light emitted from the halogen tungsten filament lamp 1 is output from the light output port 6 of the chassis after passing through the lens group 2 and the high-speed chopper 5. Then, the halogen tungsten filament lamp 1, adjustable power supply module 3, and current monitoring unit 4 are electrically connected in series, with the adjustable power supply module 3 supplying power to the halogen tungsten filament lamp 1 and the high-speed chopper 5, and the current monitoring unit 4 monitoring the operating current of the halogen tungsten filament lamp 1 in real time. Finally, after completing the installation of each component and the circuit connection, the spectral radiance of the peripheral testing equipment can be calibrated through the light output port 6.

[0025] By integrating the halogen tungsten filament lamp 1, lens group 2, adjustable power supply module 3, current monitoring unit 4, and high-speed chopper 5 into a portable instrument chassis 7, system integration is achieved, greatly improving portability and facilitating rapid on-site calibration. The current monitoring unit 4 monitors the operating current of the halogen tungsten filament lamp 1 in real time, ensuring stable light source status and improving the accuracy of calibration results. The integration of each component along the optical path into the chassis simplifies the optical path calibration process and enhances system usability.

[0026] Conventional halogen tungsten filament lamps have a loose filament structure, which makes them prone to deformation and breakage when operating at ultra-high temperatures. This results in poor light source stability and affects the accuracy and reliability of spectral radiance calibration.

[0027] In the embodiments of this application, the halogen tungsten filament lamp 1 has a close-packed filament structure.

[0028] In another possible embodiment, a halogen tungsten filament lamp 1 with a closely packed filament structure is selected as the light source and installed in a designated position inside the portable instrument chassis. The light output direction is aligned with the optical path of the lens group 2 and the high-speed chopper 5. Then, the system assembly and debugging are completed, including circuit connection, optical path calibration and other operations, so that the system can work normally.

[0029] By adopting a halogen tungsten filament lamp 1 with a closely packed filament structure, the strength of the filament structure is enhanced, making it less prone to deformation and breakage at ultra-high temperatures, thereby improving the stability and service life of the light source and ensuring the accuracy and reliability of spectral radiance calibration.

[0030] In traditional calibration systems, the surface light source formed by the light-emitting surface of the light source through optical elements has poor uniformity and unstable size, which leads to inconsistent light signals received by the peripheral test probe 8, affecting the accuracy of the calibration results.

[0031] In the embodiments of this application, the lens group 2 is used to image the light-emitting surface of the halogen tungsten filament lamp 1 onto the light outlet 6 to form a uniform surface light source.

[0032] In another possible embodiment, the lens group 2 is placed in the optical path between the halogen tungsten filament lamp 1 and the high-speed chopper 5. The position and parameters of the lens group 2 are adjusted so that the light-emitting surface of the halogen tungsten filament lamp 1 forms a uniform surface light source at the light outlet 6 after being imaged by the lens group 2. Then, the system is debugged as a whole to ensure that the optical path is unobstructed and all components are working properly.

[0033] Lens group 2 images the light-emitting surface of halogen tungsten filament lamp 1 onto light outlet 6, forming a uniform surface light source, ensuring the uniformity and consistency of the light signal received by the peripheral test probe 8, and improving the accuracy of calibration results; at the same time, the size of the surface light source is stably controlled by the imaging of lens group 2 to meet the receiving requirements of different test probes 8.

[0034] The existing calibration system has a small output surface light source diameter and its radiation characteristics do not conform to Planck's gray body radiation model. It cannot meet the calibration requirements of some instruments and equipment that have high requirements for light source size and radiation characteristics, and the calibration results deviate from the actual gray body radiation.

[0035] In the embodiments of this application, the diameter of the surface light source is not less than 2 mm, and the radiation characteristics of the surface light source satisfy Planck's gray body radiation model.

[0036] In another possible embodiment, the parameters of lens group 2 and the working state of halogen tungsten filament lamp 1 are optimized so that the diameter of the surface light source formed at the light outlet 6 is not less than 2mm and the radiation characteristics conform to Planck's gray body radiation model. Then the system is tested to verify whether the surface light source size and radiation characteristics meet the requirements.

[0037] The surface light source has a diameter of not less than 2mm, which can be adapted to more types of peripheral test probes with an 8-field of view, thus expanding the applicability of the system. The radiation characteristics of the surface light source meet the Planck gray body radiation model, making the calibration process more in line with the actual gray body radiation scenario and improving the accuracy and reliability of the calibration results.

[0038] Traditional adjustable power supply module 3 cannot independently and continuously adjust the operating current of the light source and the modulation frequency of the chopper. The output parameter adjustment of the calibration system is inflexible, making it difficult to meet the calibration requirements under different working conditions and limiting the applicability of the system.

[0039] In the embodiments of this application, the adjustable power supply module 3 can independently and continuously adjust the operating current of the halogen tungsten filament lamp 1 and the modulation frequency of the high-speed chopper 5.

[0040] In another possible embodiment, an adjustable power supply module 3 with independent continuous adjustment function is selected and connected to the halogen tungsten filament lamp 1 and the high-speed chopper 5 respectively. The working current of the halogen tungsten filament lamp 1 and the modulation frequency of the high-speed chopper 5 are adjusted by the adjustment knob or control interface of the adjustable power supply module 3 respectively. The changes in system output are observed to ensure that the adjustment function is normal.

[0041] The adjustable power supply module 3 can independently and continuously adjust the working current of the halogen tungsten filament lamp 1 and the modulation frequency of the high-speed chopper 5, so that the output spectral radiance and modulation characteristics of the calibration system can be flexibly adjusted according to actual needs, meeting the calibration requirements of different working conditions and different types of instruments and equipment, and improving the system's versatility and flexibility.

[0042] The size of the light-transmitting aperture on the blade of the high-speed chopper 5 is smaller than the size of the receiving end face of the external test probe 8, which causes part of the optical signal to be blocked. As a result, the test probe 8 cannot receive the complete optical signal, affecting the accuracy of the calibration results.

[0043] In an embodiment of this application, a light-transmitting hole is formed on the blade of the high-speed chopper 5, and the size of the light-transmitting hole is configured to be larger than the receiving end face size of the external test probe 8.

[0044] In another possible embodiment, the blades of the high-speed chopper 5 are designed and a light-passing hole is opened. The receiving end face size of the common external test probe 8 is measured to ensure that the size of the light-passing hole is larger than the size. Then, the high-speed chopper 5 is installed on the optical path of the system, and optical path testing is performed to verify whether the light-passing hole meets the requirements for complete optical signal transmission.

[0045] The size of the light-transmitting aperture on the blade of the high-speed chopper 5 is larger than the size of the receiving end face of the external test probe 8, ensuring that the external test probe 8 can receive the complete optical signal, avoiding optical signal blockage and loss, and improving the accuracy of calibration results.

[0046] Existing calibration systems have limited output spectral radiance adjustment range and narrow color temperature adjustment range, failing to cover various color temperature requirements in ultra-high temperature scenarios, thus limiting the application of the system in the calibration of instruments and equipment in different temperature ranges.

[0047] In the embodiments of this application, by adjusting the working current of the halogen tungsten filament lamp 1, the output spectral radiance of the calibration system is continuously adjustable, and the corresponding color temperature adjustment range covers 2000K to 3200K.

[0048] In another possible embodiment, the operating current of the halogen tungsten filament lamp 1 is continuously adjusted by the adjustable power supply module 3, and the spectral radiance and color temperature of the system output are monitored in real time using equipment such as a spectrometer. The spectral radiance and color temperature under different operating currents are recorded to verify whether the adjustment range covers 2000K to 3200K, and to ensure that the system adjustment function meets the requirements.

[0049] By adjusting the operating current of the halogen tungsten filament lamp 1, the output spectral radiance of the calibration system can be continuously adjusted, and the color temperature adjustment range covers 2000K to 3200K, which can meet the calibration of instruments and equipment with different color temperature requirements in ultra-high temperature scenarios and expand the application range of the system.

[0050] Example 2

[0051] Please refer to Figure 2 Accordingly, this application also provides a convenient method for calibrating ultra-high temperature spectral brightness, the calibration method comprising the following steps: S1, calibrating the spectrometer system using a calibrated ultra-high temperature blackbody furnace standard source, and obtaining the standard spectral intensity curve I of the ultra-high temperature blackbody furnace at a set temperature T. C (λ); S2. Under the same measurement conditions, use the spectrometer system to measure the output spectral intensity curve I(λ) of the calibration system under different operating currents; S3. Calculate the spectral radiance values ​​of the calibration system under different operating currents using a comparison method and based on Planck's radiation law, according to the first formula, which is expressed as: Where E(λ) is the spectral radiance value, in W·m. -2 ·sr -1 ·nm -1 C1 and C2 are the first and second radiation constants, respectively, with C1 = 1.191 * 10⁻⁶. -16 Wm 2 / Sr, C2 = 1.4388 * 10 -2 mK and λ are the spectral wavelengths, and T is the set temperature of the standard blackbody radiation source.

[0052] In another possible embodiment, the spectrometer system is first calibrated using a calibrated ultra-high temperature blackbody furnace standard source. The temperature T is then set according to the blackbody furnace operating specifications, and the spectrometer system is used to measure the standard spectral intensity curve I at that temperature. C (λ), completing the spectral radiance reference transfer; then, under the same spectrometer settings and measurement conditions as described above, aligning the output port 6 of the calibration system with the test probe 8 of the spectrometer, adjusting the operating current of the halogen tungsten filament lamp 1 via the adjustable power module 3, and using the spectrometer system to measure the output light intensity curve I(λ) of the calibration system under different operating currents; finally, according to Planck's radiation law, using the first formula (where C1 = 1.191 * 10) -16 Wm 2 / Sr, C2 = 1.4388 * 10 -2 Calculate the spectral radiance value E(λ) of the calibration system under different operating currents (where mK is the spectral wavelength and T is the set temperature of the standard blackbody radiation source).

[0053] A calibrated ultra-high temperature blackbody furnace standard source is used for spectral radiance reference transfer to ensure the accuracy of the calibration reference. The output light intensity curve of the calibration system is measured under the same measurement conditions, and the spectral radiance value is calculated by comparison method combined with Planck's radiation law to improve the accuracy and consistency of calibration results. The calibration steps are standardized and clear, which is convenient for operation and promotion.

[0054] After obtaining the spectral radiance value, the existing technology lacks further data processing of the spectral radiance curve, making it impossible to determine the color temperature and emissivity of the output light source of the calibration system. This results in insufficient understanding of the light source characteristics of the calibration system itself, affecting the comprehensive analysis of the calibration results.

[0055] In an embodiment of this application, after calculating the spectral radiance value, the method further includes: performing data fitting on the spectral radiance curve based on the Planck gray body radiation model to determine the color temperature and emissivity of the output light source of the calibration system.

[0056] In another possible embodiment, after calculating the spectral radiance value, spectral radiance curve data under different operating currents are collected. Based on the Planck gray body radiation model, data fitting software such as Origin and Matlab is used to fit the spectral radiance curves, thereby obtaining the color temperature and emissivity information of the output light source of the calibration system.

[0057] By fitting the spectral radiance curves using the Planck gray body radiation model, the color temperature and emissivity of the output light source of the calibration system can be accurately determined, improving the light source characteristic parameters of the calibration system. This facilitates a more comprehensive and in-depth analysis of the calibration results, further enhancing the quality of the calibration work.

[0058] Traditional calibration methods do not specify the calibration operation details for the radiation pyrometer 9, which makes it difficult to guarantee the alignment of the test probe 8 with the light output port 6 of the calibration system and the filling of the field of view when calibrating the radiation pyrometer 9, thus affecting the calibration accuracy of the radiation pyrometer 9.

[0059] In the embodiments of this application, the calibration method is used to calibrate the radiation pyrometer 9, specifically including: aligning the test probe 8 of the radiation pyrometer 9 with the light outlet 6 of the system, and ensuring that the surface light source formed at the light outlet 6 completely fills the field of view of the test probe 8.

[0060] In another possible embodiment, the test probe 8 of the radiation pyrometer 9 is aligned with the light outlet 6 of the calibration system, the position and angle of the test probe 8 are adjusted to ensure that the surface light source formed at the light outlet 6 completely fills the field of view of the test probe 8, and then the calibration of the radiation pyrometer 9 is completed according to the calibration steps.

[0061] The specific operation of the calibration method for calibrating the radiation pyrometer 9 was clarified, namely, ensuring that the test probe 8 of the radiation pyrometer 9 is aligned with the light output port 6 of the system and that the surface light source at the light output port 6 completely fills the field of view of the test probe 8, thus ensuring the integrity and uniformity of the light signal received by the radiation pyrometer 9 and improving the calibration accuracy of the radiation pyrometer 9.

[0062] The optional embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above embodiments. Within the scope of the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical solutions of the embodiments of the present invention, and these simple modifications all fall within the protection scope of the embodiments of the present invention.

[0063] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not describe the various possible combinations separately.

[0064] Furthermore, various different implementations of the present invention can be combined arbitrarily, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed in the present invention.

Claims

1. A convenient ultra-high temperature spectral brightness calibration system, characterized in that, The instrument includes a halogen tungsten filament lamp, a lens group, an adjustable power supply module, a current monitoring unit, and a high-speed chopper. The halogen tungsten filament lamp, the lens group, and the high-speed chopper are arranged sequentially along the optical path. The adjustable power supply module supplies power to the halogen tungsten filament lamp and the high-speed chopper. The current monitoring unit is used to monitor the operating current of the halogen tungsten filament lamp. The halogen tungsten filament lamp, the adjustable power supply module, and the current monitoring unit are electrically connected to form a series circuit. The halogen tungsten filament lamp, the lens group, the adjustable power supply module, the current monitoring unit, and the high-speed chopper are all integrated and packaged in a portable instrument chassis. The portable instrument chassis is provided with a light outlet.

2. The convenient ultra-high temperature spectral brightness calibration system according to claim 1, characterized in that, The halogen tungsten filament lamp has a closely packed filament structure.

3. The convenient ultra-high temperature spectral brightness calibration system according to claim 1, characterized in that, The lens group is used to image the light-emitting surface of the halogen tungsten filament lamp onto the light outlet to form a uniform surface light source.

4. The convenient ultra-high temperature spectral brightness calibration system according to claim 3, characterized in that, The diameter of the surface light source is not less than 2 mm, and the radiation characteristics of the surface light source satisfy Planck's gray body radiation model.

5. A convenient ultra-high temperature spectral brightness calibration system according to claim 1, characterized in that, The adjustable power module can independently and continuously adjust the operating current of the halogen tungsten filament lamp and the modulation frequency of the high-speed chopper.

6. The convenient ultra-high temperature spectral brightness calibration system according to claim 1, characterized in that, A light-transmitting hole is provided on the blade of the high-speed chopper, and the size of the light-transmitting hole is configured to be larger than the receiving end face size of the external test probe.

7. A convenient ultra-high temperature spectral brightness calibration system according to claim 1, characterized in that, By adjusting the operating current of the halogen tungsten filament lamp, the output spectral radiance of the calibration system is continuously adjustable, and the corresponding color temperature adjustment range covers 2000K to 3200K.

8. A convenient method for calibrating ultra-high temperature spectral brightness, using the system as described in any one of claims 1-7, characterized in that, The calibration method includes the following steps: S1. The spectrometer system is calibrated using a calibrated ultra-high temperature blackbody furnace standard source, and the standard spectral intensity curve I of the ultra-high temperature blackbody furnace at a set temperature T is obtained. C (λ); S2. Under the same measurement conditions, use the spectrometer system to measure the output spectral intensity curve I(λ) of the calibration system under different operating currents; S3. By comparing different operating currents and based on Planck's radiation law, the spectral radiance values ​​of the calibration system are calculated according to the first formula, which is expressed as follows: Where E(λ) is the spectral radiance value, in W·m. -2 ·sr -1 ·nm -1 C1 and C2 are the first and second radiation constants, respectively, with C1 = 1.191 * 10⁻⁶. -16 Wm 2 / Sr, C2 = 1.4388 * 10 -2 mK and λ are the spectral wavelengths, and T is the set temperature of the standard blackbody radiation source.

9. A convenient ultra-high temperature spectral brightness calibration method according to claim 8, characterized in that, After calculating the spectral radiance value, the process further includes: fitting the spectral radiance curve to the Planck gray body radiation model to determine the color temperature and emissivity of the output light source of the calibration system.

10. A convenient ultra-high temperature spectral brightness calibration method according to claim 8, characterized in that, The calibration method is used to calibrate a radiation pyrometer, specifically including: aligning the test probe of the radiation pyrometer with the light outlet of the system, and ensuring that the surface light source formed at the light outlet completely fills the field of view of the test probe.

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