Author Affiliations
1University of Science and Technology of China, Hefei 230022, Anhui, China2Nanjing Research Center of Astronomical Instruments, University of Science and Technology of China, Nanjing 210042, Jiangsu, China3Nanjing Astronomical Instruments Co., Ltd., Chinese Academy of Sciences, Nanjing 210042, Jiangsu, China4Mathematics and Science College of Shanghai Normal University, Shanghai 200234show less
Fig. 1. Layout of measuring devices. (a) Devices for measuring spectral emissivity of high-temperature materials; (b) 800 nm semi-ellipsoidal mirror
Fig. 2. Simulated ray-tracing diagrams. (a) 30°reflectivity measurement mode; (b) 60°reflectivity measurement mode; (c) 90°reflectivity measurement mode; (d) normal transmittance measurement mode
Fig. 3. Simulation result curves. (a) 30° reflectivity measurement curves; (b) 60° reflectivity measurement error curves; (c) 90° reflectivity measurement curves; (d) 30° reflectivity measurement error curves; (e) 60° reflectivity measurement curves; (f) 90° reflectivity measurement error curves
Fig. 4. 90° normal transmittance curves. (a) Measured value curves; (b) standard value curves
Fig. 5. Transmittance error curves of AlN
Fig. 6. Spectral emissivity and reflectivity of super black alloy material. (a) Emissivity; (b) reflectivity
Fig. 7. Actual measurement result curves. (a) Spectral emissivity curves of grass green sample; (b) spectral reflectivity curves of grass green sample; (c) relationship between transmittance of translucent material and wavelength; (d) standard deviation diagram of transmittance of translucent material
Fig. 8. Measurement results for alloy material. (a) Emissivity; (b) reflectivity
Fig. 9. Physical diagrams of alloy material. (a) Physical diagram of alloy material at medium-low temperature; (b) physical diagram of alloy material at high temperature
Fig. 10. Three-dimensional ray-tracing model diagrams. (a) Wireframe diagram of model; (b) physical diagram of model
Fig. 11. Two-dimensional irradiance distributions. (a) Irradiance distribution without structural factors; (b) irradiance distribution with structural factors
Parameter | Description |
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Length of ellipsoid major axis /mm | 800 | Length of ellipsoid minor axis /mm | 690 | Focal length /mm | 404.8 | Ellipsoid equation | +=1 | Material | Aluminum 7075 | Surface accuracy | ≤3λ@0.6328 μm |
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Table 1. Parameters of semi-ellipsoidal mirror
Model type | Description |
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Semi-ellipsoidal mirrorinner surface | Gold-plated film;reflectivity: 98.3%;ABg model: A=0.0001,B=0.0150, g=2 | Light source setting | Emission type: blackbody;number of rays: 100000;angular distribution: Lambertian;temperature: 1000 K | Off-axis mirror | Gold-plated film;reflectivity: 99.9%;wavelength: 2--14 μm | Sample surface model | Specular/diffuse reflection | Infrared spectrometer | Receiving surface is setas a perfect absorber witha radius of 80 mm |
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Table 2. Parameters of Ray tracing