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兰州理工大学 [1]
长春光学精密机械与物... [1]
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会议论文 [2]
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2015 [1]
2006 [1]
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Effect of Reflector Structure on Solar Collecting Performance of Thermal Receive-storage Cavity
会议论文
作者:
Wang, J. W.
;
Jia, H. G.
;
Wang, Z. P.
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浏览/下载:7/0
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提交时间:2019/11/15
The full hemisphere integrating measurement of the reflectance of black cavity (EI CONFERENCE)
会议论文
ICO20: Illumination, Radiation, and Color Technologies, August 21, 2005 - August 26, 2005, Changchun, China
Fang W.
;
Wang Y.
;
Yu B.
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提交时间:2013/03/25
The conical black cavities are used in the Solar Irradiance Absolute Radiometers (SIARs) of the solar constant monitor aboard on the SZ spaceship and of the Solar Total Irradiance Monitor (STIM) aboard on sun-synchronous polar orbit weather satellites. A low reflectance measurement instrument which is used for making the integrating measurement on the reflectance of the conical black cavity in a high precision within the full hemisphere (include the entrance of the Ulbrichtsphere) has been constructed. The characteristic of the instrument is the employment of a semi-transparent mirror
which is mounted in an inclination angle of 45 degrees in front of the entrance of the Ulbrichtsphere. The incident beam is reflected to the black cavity or white board by the semi-transparent mirror. A portion of those
which is made diffused reflection through the black cavity or white board
is measured by the detector located in the side face of the Ulbrichtsphere
and the other portion which is reflected to the entrance is measured by the other detector
after passing through the semi-transparent mirror
and then being focused on by an ellipsoidal mirror. The two measurement data are added up to get the integrating reflectance within full hemisphere. The presentation and verification on the measurement result of the reflectance of the black cavity and its precision are described in this article. The absolute accuracy can reach 0.012%.
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