Acta Optica Sinica, Volume. 42, Issue 12, 1212002(2022)
High-Precision BRDF Measurement System in Near Infrared Band
Figures & Tables(9)
Fig. 5. Stability results of light source systems. (a) Xenon lamp; (b) SiN light source
Fig. 7. Measurement results of diffuse reflection gold plate at different wavelengths. (a) 1064 nm; (b) 2000 nm
Table 1. Accuracy and repeatability of wavelengthunit: nm
View tableTable 1. Accuracy and repeatability of wavelengthunit: nm
Calibration Measurement Indication error Repeatability 1069.8 1069.5 -0.3 0.1 1150.2 1150.5 0.3 0.1 1363.8 1363.5 -0.3 0.1 1464.5 1464.1 -0.4 0.1 1523.9 1523.5 -0.4 0.1 1938.4 1938.5 0.1 0.1
Table 2. BRDF measurement results of diffuse gold plate
View tableTable 2. BRDF measurement results of diffuse gold plate
θr of 1064 nm /(°) BRDF of 1064 nm /sr-1 θr of 2000 nm /(°) BRDF of 2000 nm /sr-1 5 1.765 10 2.419 10 1.247 15 1.233 15 0.718 20 0.560 20 0.310 25 0.245 25 0.130 30 0.130 30 0.050 35 0.088 35 0.025 40 0.064 40 0.016 45 0.051 45 0.009 50 0.046 70 0.006 65 0.042 80 0.005 85 0.037
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Zhuoran Li, Yuxiao Li, Zilong Liu. High-Precision BRDF Measurement System in Near Infrared Band[J]. Acta Optica Sinica, 2022, 42(12): 1212002
Paper Information
Category: Instrumentation, Measurement and Metrology
Received: Nov. 1, 2021
Accepted: Jan. 20, 2022
Published Online: Jun. 7, 2022
The Author Email: Liu Zilong (liuzl@nim.ac.cn)
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