High-temperature lens transmittance and high-temperature lens radiation spectrum test platform and test method

Abstract

The present invention provides a test platform and a test method for the transmittance and radiation spectrum of a high-temperature lens. The test platform includes a blackbody furnace for generating a light source, a lens mounting cavity for mounting the lens, and a spectral measuring instrument for measuring the spectral radiation energy value of an object in different wavelength bands, which are arranged on an operating table. A heating device for heating the lens in the lens mounting cavity is provided on the lens mounting cavity. By adjusting the positions of the blackbody furnace and the lens mounting cavity, the present invention measures the blackbody radiation energy value E1 passing through the lens mounting cavity, the blackbody radiation energy value E2 of the lens mounting cavity after adding the lens, the self-radiation energy value E3 of the lens, and the blackbody radiation energy value E4 at the target temperature through the spectral measuring instrument, so as to obtain the transmittance of the high-temperature lens and the self-radiation luminance value of the high-temperature lens, and eliminate the influence of the transmittance and self-radiation spectrum of the lens at high temperature on the experimental results of detecting the radiation spectrum of a high-temperature object.

Description

Technical Field

[0001] The invention belongs to the field of lens transmittance testing, and in particular relates to a high-temperature lens transmittance and high-temperature lens radiation spectrum testing platform and a testing method. Background Art

[0002] With the gradual popularization of remote sensing technology, the foundation for remote sensing detection has been laid in order to explore the radiation spectra of different substances. There are more and more experiments related to detecting the radiation spectra of high-temperature substances, such as high-temperature gas detection experiments, low-carbon chemical combustion spectrum detection experiments, etc. These experiments often use lenses as the detection medium when detecting the radiation spectra of high-temperature objects.

[0003] However, in a high temperature environment, the transmittance and radiation spectrum of the lens itself often affect the detection process, making the actual result of the radiation spectrum of high temperature materials inaccurate due to the influence of the lens transmittance and the lens' own radiation spectrum. Experimental tests show that at room temperature, the transmittance of single-crystal silicon lenses to light of different wavelengths is different. The transmittance of lenses of different wavelengths is less than 60%, and as the temperature rises, the transmittance of light of different wavelengths is also different, but the data under high temperature conditions has yet to be tested. Therefore, in order to eliminate this influence, an integrated test platform for the transmittance and self-radiation spectrum of high temperature lenses is built to eliminate the influence of the transmittance and self-radiation spectrum of lenses at high temperatures on the experimental results. Summary of the invention

[0004] The present invention aims to solve the technical problems existing in the prior art. The purpose of the present invention is to provide a high-temperature lens transmittance and high-temperature lens radiation spectrum testing platform.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a high-temperature lens transmittance and high-temperature lens radiation spectrum testing platform, including an operating table, on which are installed a blackbody furnace for generating a light source, a lens mounting cavity for mounting a lens, and a spectrometer for measuring the spectral radiation energy value of an object in different bands, which are arranged in sequence along its length direction; the lens mounting cavity is provided with a heating device for heating the lens therein; the light source of the blackbody furnace and the lens in the lens mounting cavity can be located in the same optical path and can both be located within the field of view of the spectrometer, the blackbody furnace can also be located separately within the field of view of the spectrometer, and the lens in the lens mounting cavity can also be located separately within the field of view of the spectrometer.

[0006] In the above technical solution, the blackbody furnace is used to emit light in the full wavelength band, the lens mounting cavity and the heating device are used to provide a high-temperature lens, and the spectral measuring instrument is used to measure the spectral radiation energy value of an object in different wavelength bands. By adjusting the positions of the blackbody furnace and the lens mounting cavity, the lens in the blackbody furnace and the lens mounting cavity can be separately located within the field of view angle of the spectral measuring instrument, or both the blackbody furnace and the lens mounting cavity can be located within the field of view angle of the spectral measuring instrument. Thus, the blackbody radiation energy value E1 passing through the lens mounting cavity, the blackbody radiation energy value E2 of the lens mounting cavity with the lens added, the self-radiation energy value E3 of the lens, and the blackbody radiation energy value E4 at the target temperature can be measured by the spectral measuring instrument. Then, the transmittance of the high-temperature lens and the self-radiation luminance value of the high-temperature lens can be calculated to exclude the influence of the transmittance of the lens and its self-radiation spectrum at high temperature on the experimental results of detecting the radiation spectrum of a high-temperature object.

[0007] In a preferred embodiment of the present invention, a first guide rail extending along the width direction of the operating table is provided on the operating table, and the blackbody furnace is slidably connected to the first guide rail and can slide on the first guide rail; and / or a second guide rail extending along the width direction of the operating table is provided on the operating table, and the lens mounting cavity is slidably connected to the second guide rail and can slide on the second guide rail.

[0008] In the above technical solution, the first guide rail and the second guide rail play a guiding role, facilitating the operator to move the blackbody furnace and / or the lens mounting cavity along the width direction of the operating table.

[0009] In a preferred embodiment of the present invention, the lens mounting cavity includes an annular side wall, and through holes are provided at both ends of the annular side wall.

[0010] In the above technical solution, the annular side wall forms a cavity for mounting the lens, and the through holes at both ends of the lens mounting cavity facilitate the spectral measuring instrument to pass through the through holes to measure the blackbody radiation energy value of the lens mounting cavity, making the test more accurate.

[0011] In a preferred embodiment of the present invention, a doorway is provided on the side wall of the lens mounting cavity, and the lens can be mounted inside the lens mounting cavity through the doorway. A door panel for closing the doorway is provided at the doorway.

[0012] In the above technical solution, the provision of the doorway facilitates the disassembly and assembly of the lens through the doorway. The door panel is provided to close the doorway to reduce the heat loss of the lens, and a cavity for accommodating nitrogen or inert gas can be formed inside the lens mounting cavity.

[0013] In a preferred embodiment of the present invention, one end of the door panel is rotatably connected to the lens mounting cavity, and the other end of the door panel is detachably fixedly connected to the lens mounting cavity; or the door panel is a sliding door, and the door panel is slidably connected to the lens mounting cavity.

[0014] In another preferred embodiment of the present invention, the heating device includes two groups of high-temperature heating plates connected to the lens mounting cavity and located on both sides of the lens. The lens is clamped by the two groups of high-temperature heating plates on its two sides to be fixed.

[0015] In the above technical solution, one group of high-temperature heating plates is arranged on each side of the lens, and both sides of the lens are heated, so that the lens is heated more evenly. Moreover, the two groups of high-temperature heating plates can also axially limit the lens to fix it in the lens mounting cavity.

[0016] In another preferred embodiment of the present invention, a scale slide rail extending along its length direction is fixedly connected to the outside of the lens mounting cavity, and a slider that partially extends outside the lens mounting cavity and is slidably connected to the scale slide rail is fixedly connected to the high-temperature heating plate.

[0017] In the above technical solution, when testing lenses of different thicknesses, the position of the slider on the scale slide rail can be observed to know the thickness of the lens.

[0018] In another preferred embodiment of the present invention, the test platform further includes a gas supply device capable of providing nitrogen or inert gas. The gas outlet of the gas supply device is connected to the air inlet on the side wall of the lens mounting cavity; an air inlet communicating with its interior is provided on one side wall of the lens in the lens mounting cavity or an air inlet communicating with its interior is provided on each of the two side walls of the lens. When an air inlet is provided on the side wall of the lens mounting cavity, the lens mounting cavity is mounted on a rotatable turntable; the lens is located in the middle of the lens mounting cavity or at the end near one end of the lens mounting cavity.

[0019] In another preferred embodiment of the present invention, it includes a high-temperature lens transmittance test method and a high-temperature lens radiant luminance value test method;

[0020] The high-temperature lens transmittance test method includes the following steps:

[0021] After the blackbody furnace is heated to the target temperature, the temperature of the blackbody furnace is kept constant, and the positions of the blackbody furnace and / or the lens mounting cavity are adjusted so that the radiation of the light source of the blackbody furnace can pass through the lens mounting cavity and all enter the field of view angle of the spectral measuring instrument. The spectral measuring instrument measures the blackbody radiation energy value E1 passing through the lens mounting cavity;

[0022] Keep the positions of the blackbody furnace, the lens mounting cavity and the spectral measuring instrument unchanged, install the lens in the lens mounting cavity, start the heating device to heat the lens, so that the lens rises to the target temperature, and the spectral measuring instrument measures the blackbody radiation energy value E2 of the lens mounting cavity after adding the lens;

[0023] Move the blackbody furnace outside the field of view angle of the spectral measuring instrument and there is no light source within the field of view angle of the spectral measuring instrument, and the spectral measuring instrument measures the self-radiation energy value E3 of the lens;

[0024] The transmittance of the high-temperature lens is calculated according to the formula T(v) = E1 / (E2 - E3) * 100%.

[0025] The method for testing the radiant luminance value of the high-temperature lens includes the following steps:

[0026] After completing the transmittance test of the high-temperature lens, adjust the positions of the blackbody furnace and the lens mounting cavity so that the light source of the blackbody furnace is within the field of view angle of the spectral measuring instrument and the lens mounting cavity is outside the field of view angle of the spectral measuring instrument. The spectral measuring instrument measures the blackbody radiation energy value E4 at the target temperature, and combined with Planck's blackbody formula and Python for calibration calculation, the self-radiant luminance value L1 of the lens is obtained.

[0027] In the above technical solution, by adjusting the positions of the blackbody furnace and the lens mounting cavity, the spectral measuring instrument measures the blackbody radiation energy value E1 passing through the lens mounting cavity, the blackbody radiation energy value E2 of the lens mounting cavity after adding the lens, the self-radiation energy value E3 of the lens, and the blackbody radiation energy value E4 at the target temperature, and calculates the transmittance of the high-temperature lens and the self-radiant luminance value of the high-temperature lens, excluding the influence of the transmittance of the lens and its self-radiation spectrum at high temperature on the experimental results of detecting the radiation spectrum of high-temperature objects.

[0028] In another preferred embodiment of the present invention, when a gas supply device is provided; in the step of measuring E1, before measuring E1, turn on the gas supply device and fill the lens mounting cavity with nitrogen or inert gas to discharge the air inside the lens mounting cavity; in the step of measuring E2, before heating the lens, turn on the gas supply device and fill the lens mounting cavity with nitrogen or inert gas to discharge the air inside the lens mounting cavity, and the filled nitrogen or inert gas fills the side of the lens in the lens mounting cavity close to the spectral measuring instrument; in the step of measuring E3, before measuring E3, turn on the gas supply device and fill the lens mounting cavity with nitrogen or inert gas to discharge the air inside the lens mounting cavity, and the filled nitrogen or inert gas fills the side of the lens in the lens mounting cavity close to the blackbody furnace.

[0029] In the above technical solution, when measuring E1, E2, and E3, nitrogen or inert gas is introduced into the lens mounting cavity to discharge the air inside it, avoiding the influence of the self-radiation of the lens after heating when air contacts it and the absorption of the lens radiation by the air on the accuracy, and the self-radiation and absorption of nitrogen or inert gas are very small, so that the measurement of E1, E2, and E3 is more accurate.

[0030] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0031] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of embodiments in conjunction with the accompanying drawings, in which:

[0032] Figure 1 is a schematic structural diagram of a high-temperature lens transmittance and high-temperature lens radiation spectrum test platform according to an embodiment of the present application.

[0033] Figure 2 is a longitudinal sectional view schematic diagram of a lens mounting cavity in an embodiment of the present application.

[0034] Reference numerals in the accompanying drawings of the specification include: blackbody furnace 1, lens mounting cavity 2, high-temperature heating plate 3, slider 4, thermometer 5, lens 6, door panel 7, handle 71, graduated slide rail 8, air inlet 9 of the lens mounting cavity, magnetic strip 10, first guide rail 111, second guide rail 112, spectral measuring instrument 12, gas supply device 13, gas storage cylinder 131, gas supply valve 132, gas supply pipe 133, turntable 14, hinge 15, support feet 16, data analysis system 17, blackbody furnace temperature control box 18, lens temperature control box 19, operation table 20, bottom plate 21. Detailed Embodiments

[0035] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "longitudinal", "lateral", "vertical", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0037] In the description of the present invention, unless otherwise specified and defined, it should be noted that the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a mechanical connection or an electrical connection, or may be the communication inside two elements. It may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0038] The present invention provides a high-temperature lens transmittance and high-temperature lens radiation spectrum test platform and a test method.

[0039] As Figure 1 and Figure 2 shown, in a preferred embodiment, the high-temperature lens transmittance and high-temperature lens radiation spectrum test platform includes an operation table 20, on which a blackbody furnace 1 for generating a light source, a lens mounting cavity 2 for mounting a lens 6, and a spectral measuring instrument 12 for measuring the spectral radiation energy values of an object in different bands are sequentially arranged along its length direction. For example, the blackbody furnace 1, the lens mounting cavity 2, and the spectral measuring instrument 12 are arranged in sequence from left to right. The lens mounting cavity 2 is provided with a heating device for heating the lens 6 inside it. A blackbody furnace temperature control box 18 for adjusting the temperature of the blackbody furnace 1 is arranged below the blackbody furnace 1 and the operation table 20, and a lens temperature control box 19 for adjusting the temperature of the heating device to heat the lens 6 is arranged below the lens mounting cavity 2 and the operation table 20.

[0040] The light source of the blackbody furnace 1 and the lens 6 in the lens mounting cavity 2 can be located in the same optical path and both can be within the field of view angle of the spectral measuring instrument 12. The blackbody furnace 1 can also be located alone within the field of view angle of the spectral measuring instrument 12, and the lens 6 in the lens mounting cavity 2 can also be located alone within the field of view angle of the spectral measuring instrument 12. The position of the spectral measuring instrument 12 in this embodiment is fixed, and the blackbody furnace 1 and the lens mounting cavity 2 can move independently back and forth on the operation table 20. Preferably, the operation table 20 is provided with a first guide rail 111 extending along its width direction. The blackbody furnace 1 is slidably connected to the first guide rail 111 and can slide back and forth on the first guide rail 111. The operation table 20 is provided with a second guide rail 112 extending along its width direction. The lens mounting cavity 2 is slidably connected to the second guide rail 112 and can slide on the second guide rail 112.

[0041] The spectral measuring instrument 12 of the present invention adopts a Fourier transform infrared spectrometer, which is a full-band and high-precision spectral measurement and monitoring instrument. The spectral measuring instrument 12 is connected to a data analysis system 17. The data analysis system 17 can adopt a computer, and the signal output end of the spectral measuring instrument 12 is connected to the computer.

[0042] In the present invention, the lens mounting cavity 2 includes an annular side wall, and both ends of the annular side wall are provided with through holes. When no lens 6 is installed in the lens mounting cavity 2, the spectral measuring instrument 12 can pass through the through holes at both ends of the lens mounting cavity 2 to measure the blackbody radiation energy value. The lower end of the lens mounting cavity 2 is connected with a support foot 16, and the lens mounting cavity 2 is mounted on the bottom plate 21 through the support foot 16. The bottom plate 21 is slidably connected to the second guide rail 112 on the operation table 20.

[0043] To facilitate the installation of the lens 6 in the lens mounting cavity 2, a doorway is provided on the side wall of the lens mounting cavity 2. The lens 6 can be installed inside the lens mounting cavity 2 through the doorway. A door panel 7 for closing the doorway is provided at the doorway, and a handle 71 is provided on the door panel 7. Preferably, the lower end of the door panel 7 is rotatably connected to the lens mounting cavity 2 through a hinge 15, and the upper end of the door panel 7 is detachably fixedly connected to the lens mounting cavity 2, such as by magnetic attraction or snap connection. When connected by magnetic attraction, a magnetic strip 10 can be fixedly connected to the lens mounting cavity 2, and the upper end of the door panel 7 can be fixed by the suction force of the magnetic strip 10.

[0044] It should be noted that the door panel 7 can also adopt a sliding door structure, and the door panel 7 is slidably connected to the lens mounting cavity 2, and can specifically slide along the axial or circumferential direction of the lens mounting cavity 2 to open or close the door panel 7.

[0045] In the present invention, the heating device includes two groups of high-temperature heating plates 3 connected to the lens mounting cavity 2 and located on both sides of the lens 6. The lens 6 is clamped and fixed by the two groups of high-temperature heating plates 3 on its two sides, and the high-temperature heating plates 3 will not move in the lens mounting cavity 2 without external force.

[0046] Specifically, as Figure 2 shown, one group of high-temperature heating plates 3 includes two high-temperature heating plates 3 arranged circumferentially along the inner wall of the lens mounting cavity 2, and the two high-temperature heating plates 3 are respectively located at the top and bottom of the lens mounting cavity 2. When the lens 6 needs to be installed, pull the handle 71 to open the door panel 7, move the two groups of high-temperature heating plates 3 left and right so that there is a space for accommodating the lens 6 between the two groups of high-temperature heating plates 3, then place the lens 6 between the two groups of high-temperature heating plates 3, and then adjust the positions of the two groups of high-temperature heating plates 3 to clamp the lens 6 and fix its position. By adjusting the left and right positions of the sliders 4 of the two groups of high-temperature heating plates 3, lenses 6 with different thicknesses can be installed and fixed.

[0047] In another preferred embodiment, a graduated slide rail 8 extending along its length direction is fixedly connected outside the lens mounting cavity 2, and one graduated slide rail 8 is fixedly connected to the outside of the top and bottom of the lens mounting cavity 2 respectively. A slider 4 that partially extends outside the lens mounting cavity 2 and is slidably connected to the graduated slide rail 8 is fixedly connected to each high-temperature heating plate 3. The high-temperature heating plate 3 and the slider 4 are connected by a heat-insulating material, and the slider 4 will not be hot when the high-temperature heating plate 3 is heated. The slider 4 connected to the upper high-temperature heating plate 3 is snapped into the upper graduated slide rail 8 and can slide left and right on it, and the slider 4 connected to the lower high-temperature heating plate 3 is snapped into the lower graduated slide rail 8 and can slide left and right on it.

[0048] When testing lenses 6 with different thicknesses, the thickness of the lens 6 can be known by observing the position of the slider 4 on the graduated slide rail 8.

[0049] AsFigure 1 As shown, in another preferred embodiment, the test platform further includes a gas supply device 13 capable of providing nitrogen or inert gas. The gas outlet of the gas supply device 13 is connected to the air inlet on the side wall of the lens mounting cavity 2. The gas supply device 13 includes a gas storage cylinder 131 for storing nitrogen or inert gas. A gas supply pipe 133 is connected to the gas outlet of the gas storage cylinder 131. A gas supply valve 132 is provided on the gas supply pipe 133. The gas outlet of the gas supply pipe 133 is connected to the air inlet 9 of the lens mounting cavity.

[0050] In this embodiment, an air inlet 9 communicating with the inside is provided on the right side wall of the lens mounting cavity 2 where the lens 6 is located. The lens mounting cavity 2 is mounted on a rotatable turntable 14 through support feet 16, and the turntable 14 is rotatably connected to the bottom plate 21. Preferably, the lens 6 is located at Figure 1 the left end of the lens mounting cavity 2 as shown, so that Figure 1 there is a cavity with sufficient length on the right side of the lens 6 in the lens mounting cavity 2 as shown. Of course, the lens 6 can also be arranged in the middle of the lens mounting cavity 2.

[0051] The test methods of the test platform of the present invention include a high-temperature lens transmittance test method and a high-temperature lens radiant luminance value test method.

[0052] Among them, the high-temperature lens transmittance test method includes the following steps:

[0053] S1. Turn on the blackbody furnace 1, adjust the temperature control box 18 of the blackbody furnace 1 to heat up the blackbody furnace 1. When the temperature of the blackbody furnace 1 reaches the target temperature (greater than 500 °C), fix the temperature of the blackbody furnace 1; then turn on the gas supply device 13, and fill the lens mounting cavity 2 with nitrogen or inert gas to discharge the air inside the lens mounting cavity 2. The air is discharged from the through holes at both ends of the lens mounting cavity 2, and keep a small amount of inert gas or nitrogen continuously introduced; next, adjust the position of the blackbody furnace 1 and / or the lens mounting cavity 2 so that the light source of the blackbody furnace 1 can pass through the lens mounting cavity 2 and all enter the field of view angle of the spectral measuring instrument 12. The spectral measuring instrument 12 measures the blackbody radiation energy value E1 passing through the lens mounting cavity 2. After measuring E1, close the gas supply valve 132 of the gas supply device 13.

[0054] S2. Keep the positions of the blackbody furnace 1, the lens mounting cavity 2, and the spectrometer 12 unchanged. Open the door panel 7, install the lens 6 in the lens mounting cavity 2, and make the lens 6 closely contact the high-temperature heating plates 3 on both sides of it to ensure uniform heating. Open the gas supply valve 132 of the gas supply device 13, and fill nitrogen or inert gas into the cavity on the right side of the lens 6 in the lens mounting cavity 2 to discharge the air inside the lens mounting cavity 2 on the right side of the lens 6. The air is discharged from the through hole at the right end of the lens mounting cavity 2, and keep a small amount of inert gas or nitrogen continuously introduced. Start the heating device, and the high-temperature heating plates 3 heat the lens 6. Adjust the heating temperature through the lens temperature control box 19 to raise the lens 6 to the target temperature, and the spectrometer 12 measures the blackbody radiation energy value E2 of the lens mounting cavity 2 after the lens 6 is added.

[0055] S3. Move the blackbody furnace 1 backward on the first guide rail 111 outside the field of view angle of the spectrometer 12 and without a light source within the field of view angle of the spectrometer 12, and then rotate the turntable 14 by 180°. The spectrometer 12 measures the self-radiation energy value E3 of the lens 6. In this step, it is necessary to keep the high-temperature heating plates 3 working to keep the lens 6 at the target temperature, and the gas supply device 13 also needs to provide a small amount of inert gas or nitrogen continuously introduced. Since the turntable 14 rotates by 180°, the gas supply device 13 continuously introduces a small amount of inert gas or nitrogen into the cavity of the lens mounting cavity 2 on the left side of the lens 6 after it rotates by 180°, so that there is a section of inert gas or nitrogen background on the left side of the lens 6.

[0056] S4. The data analysis system 17 calculates the transmittance of the high-temperature lens according to the formula T(v) = E1 / (E2 - E3) * 100%. When measuring E1, E2, and E3 in the present invention, nitrogen or inert gas is introduced into the lens mounting cavity 2 to discharge the air inside it, avoiding the influence of the self-radiation of the lens 6 after heating when the air contacts it and the absorption of the radiation of the lens 6 by the air on the accuracy. Moreover, the self-radiation and absorption of nitrogen or inert gas are very small, so that the measurement of E1, E2, and E3 is more accurate. In addition, when measuring E2, the light source of the blackbody furnace 1 is the background. At this time, the lens 6 is close to the blackbody furnace 1, ensuring that all the blackbody radiation energy passes through the lens 6, making the measurement of E2 more accurate; when measuring E3, due to the limited length of the lens mounting cavity 2, the lens mounting cavity 2 is rotated by 180°, so as to ensure that there is a relatively long inert gas or nitrogen background when measuring E3, making the measurement of E3 more accurate.

[0057] The test method for the radiation luminance value of a high-temperature lens includes the following steps: After completing the aforementioned transmittance test of the high-temperature lens, adjust the position of the blackbody furnace 1 forward on the first guide rail 111, and adjust the position of the lens mounting cavity 2 backward on the second guide rail 112, so that the light source of the blackbody furnace 1 is within the field of view angle of the spectral measuring instrument 12, and the lens mounting cavity 2 is outside the field of view angle of the spectral measuring instrument 12. Taking the light source of the blackbody furnace 1 as a reference, the spectral measuring instrument 12 measures the blackbody radiation energy value E4 at the target temperature (at this time, the temperature of the blackbody furnace 1 needs to be controlled at the target temperature of the lens to be measured). Combining the Planck blackbody formula and Python for calibration calculation, the self-radiation luminance value L1 of the lens is obtained. Specifically, calibrating the self-radiation luminance value L1 based on E4 is prior art and will not be elaborated here. The blackbody furnace 1 emits light sources of different bands, obtains the energy values E4 of different bands, and then calibrates the self-radiation luminance values L1 of the lens in different bands. Taking the wavelength as the abscissa and the self-radiation luminance value L1 of the lens as the ordinate, the lens radiation spectrogram can be plotted.

[0058] The present invention can make the blackbody furnace 1 emit light sources of different bands, obtain the energy values E1, E2, and E3 of different bands, thereby obtaining the transmittance of the high-temperature lens in different bands. Then, by measuring the blackbody background radiation energy value E4 and performing calibration calculation, the radiation luminance value of the high-temperature lens is obtained, and then the lens radiation spectrogram is plotted. The present invention can also adjust the temperature of the lens 6 heated by the lens temperature control box 19 to obtain the transmittance of the lens and the radiation luminance value of the lens at different temperatures.

[0059] The present invention can measure the transmittance and radiation spectrum of the lens for light of different bands at high temperatures. When detecting the spectrum of substances in a high-temperature closed environment, the lens is usually used as the detection medium, such as high-temperature gas spectrum detection experiments, spectrum detection of substances in a closed heating furnace, etc. These usually use the lens as the observation window. This test platform can accurately measure the transmittance and self-radiation spectrum of the high-temperature lens in different bands while excluding the interference of the lens's own radiation, and then exclude the interference of the lens transmittance and self-radiation spectrum on the radiation spectrum of the object to be measured. At the same time, lens manufacturers can also use the transmittance of the lens at different temperatures and the self-radiation spectrum of the lens at different temperatures as the factory parameters of the lens through this test platform, which is convenient for users.

[0060] Example 2

[0061] The structural principle of this embodiment is basically the same as that of the first embodiment. The difference lies in that the number and positions of the air inlets 9 of the lens mounting cavity are different. In this embodiment, one air inlet 9 communicating with the inside is provided on each of the two side walls of the lens 6 in the lens mounting cavity 2, that is, one air inlet 9 is provided on each of the left and right side walls of the lens mounting cavity 2 where the lens 6 is located. The gas storage cylinder 131 is connected to the two air inlets 9 of the lens mounting cavity 2 through two parallel supply air pipes 133, and air supply valves 132 are provided on both of the two supply air pipes 133. In this embodiment, the turntable 14 does not need to be provided.

[0062] In the step of measuring E2, the nitrogen or inert gas provided by the air supply device 13 only enters from the air inlet 9 on the right side of the lens mounting cavity 2, and the right side of the lens 6 in the lens mounting cavity 2 is filled with nitrogen or inert gas. In the step of measuring E3, the nitrogen or inert gas provided by the air supply device 13 only enters from the air inlet on the left side of the lens mounting cavity 2, and the left side of the lens 6 in the lens mounting cavity 2 is filled with nitrogen or inert gas.

[0063] In the description of this specification, the description with reference to terms such as "preferred embodiment", "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0064] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A testing method for the transmittance of a high-temperature lens and the radiation spectrum of a high-temperature lens testing platform, characterized in that, The test platform includes an operation table, on which a blackbody furnace for generating a light source, a lens mounting cavity for mounting lenses, and a spectral measuring instrument for measuring the spectral radiant energy value of an object at different wavelengths are sequentially arranged along its length direction. The lens mounting cavity includes an annular side wall, and both ends of the annular side wall are through holes. A heating device for heating the lens inside the lens mounting cavity is provided on the lens mounting cavity; The light source of the blackbody furnace and the lens in the lens mounting cavity can be located in the same optical path and both can be within the field of view angle of the spectral measuring instrument. The blackbody furnace can also be located alone within the field of view angle of the spectral measuring instrument, and the lens in the lens mounting cavity can also be located alone within the field of view angle of the spectral measuring instrument; The test method includes a high-temperature lens transmittance test method and a high-temperature lens radiant luminance value test method; The high-temperature lens transmittance test method includes the following steps: After the blackbody furnace is heated to the target temperature, the temperature of the blackbody furnace is fixed. Adjust the positions of the blackbody furnace and / or the lens mounting cavity so that the radiation of the light source of the blackbody furnace can pass through the lens mounting cavity and all enter the field of view angle of the spectral measuring instrument. The spectral measuring instrument measures the blackbody radiation energy value E1 passing through the lens mounting cavity; Keep the positions of the blackbody furnace, the lens mounting cavity, and the spectral measuring instrument unchanged. Install the lens in the lens mounting cavity, start the heating device to heat the lens, and raise the lens to the target temperature. The spectral measuring instrument measures the blackbody radiation energy value E2 of the lens mounting cavity after adding the lens; Move the blackbody furnace outside the field of view angle of the spectral measuring instrument and there is no light source within the field of view angle of the spectral measuring instrument. The spectral measuring instrument measures the self-radiation energy value E3 of the lens; Calculate the high-temperature lens transmittance according to the formula T(v)=E1 / (E2-E3)*100%; The high-temperature lens radiant luminance value test method includes the following steps: After the high-temperature lens transmittance test is completed, adjust the positions of the blackbody furnace and the lens mounting cavity so that the light source of the blackbody furnace is within the field of view angle of the spectral measuring instrument and the lens mounting cavity is outside the field of view angle of the spectral measuring instrument. The spectral measuring instrument measures the blackbody radiation energy value E4 at the target temperature, and combines the Planck blackbody formula and Python for calibration calculation to obtain the self-radiant luminance value L1 of the lens.

2. The test method according to claim 1, characterized in that, A first guide rail extending along the width direction of the operation table is provided on the operation table. The blackbody furnace is slidably connected to the first guide rail and can slide on the first guide rail; And / or a second guide rail extending along the width direction of the operation table is provided on the operation table. The lens mounting cavity is slidably connected to the second guide rail and can slide on the second guide rail.

3. The test method according to claim 1, wherein A door opening is provided on the side wall of the lens mounting cavity. The lens can be installed inside the lens mounting cavity through the door opening, and a door panel for closing the door opening is provided at the door opening.

4. The test method according to claim 3, wherein One end of the door panel is rotatably connected to the lens mounting cavity, and the other end of the door panel is detachably fixedly connected to the lens mounting cavity; Or the door panel is a sliding door, and the door panel is slidably connected to the lens mounting cavity.

5. The testing method according to claim 1, characterized in that, The heating device includes two groups of high-temperature heating plates that are connected to the lens mounting cavity and located on both sides of the lens. The lens is clamped and fixed by the two groups of high-temperature heating plates on its two sides.

6. The test method according to claim 5, characterized in that, A scale slide rail extending along its length direction is fixedly connected to the outside of the lens mounting cavity. A slider that partially extends outside the lens mounting cavity and is slidably connected to the scale slide rail is fixedly connected to the high-temperature heating plate.

7. The test method according to any one of claims 1-6, characterized in that, It further includes a gas supply device capable of providing nitrogen or inert gas. The gas outlet of the gas supply device is connected to the air inlet on the side wall of the lens mounting cavity. An air inlet communicating with its interior is provided on one side wall of the lens in the lens mounting cavity, or an air inlet communicating with its interior is provided on each of the two side walls of the lens. When one such air inlet is provided on the side wall of the lens mounting cavity, the lens mounting cavity is mounted on a rotatable turntable. The lens is located in the middle of the lens mounting cavity or at the end near one end of the lens mounting cavity.

8. The test method according to claim 7, characterized in that, When the gas supply device is provided; In the step of measuring E1, before measuring E1, the gas supply device is turned on, and nitrogen or inert gas is filled into the lens mounting cavity to discharge the air inside the lens mounting cavity. In the step of measuring E2, before heating the lens, the gas supply device is turned on, and nitrogen or inert gas is filled into the lens mounting cavity to discharge the air inside the lens mounting cavity. The filled nitrogen or inert gas fills the side of the lens in the lens mounting cavity close to the spectral measuring instrument. In the step of measuring E3, before measuring E3, the gas supply device is turned on, and nitrogen or inert gas is filled into the lens mounting cavity to discharge the air inside the lens mounting cavity. The filled nitrogen or inert gas fills the side of the lens in the lens mounting cavity close to the blackbody furnace.

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