Haiyong Gan, Yingwei He, Xiangliang Liu, Nan Xu, Houping Wu, Guojin Feng, Wende Liu, Yandong Lin, "Absolute cryogenic radiometer for high accuracy optical radiant power measurement in a wide spectral range," Chin. Opt. Lett. 17, 091201 (2019)
- Chinese Optics Letters
- Vol. 17, Issue 9, 091201 (2019)
Fig. 1. Optical radiant power measurement and photodetector spectral responsivity calibration scheme.
Fig. 2. ACR facility at the National Institute of Metrology, China.
Fig. 3. Picture of the ACR cavity receiver.
Fig. 4. Spectral diffuse reflectance measurement results of the specular black material on a flat surface. Inset: the cavity receiver with the inner surface coated with the specular black material.
Fig. 5. Cavity receiver thermistor resistance records during the optical radiant power measurements without reaching full thermal equilibrium.
Fig. 6. Thermistor resistance reading changing rate during the optical radiant power measurements without reaching complete thermal equilibrium.
Fig. 7. Derivation of thermistor resistance at complete thermal equilibrium based on the optical radiant power measurement results without reaching complete thermal equilibrium.
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Table 1. Uncertainty Analysis for Optical Radiant Power Measurements at ∼100 μW (250 nm–16 μm)
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Table 2. Uncertainty Analysis for Optical Radiant Power Measurements at ∼1 mW (500 nm–16 μm)
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