Absorptance measurement for sloping bottom cavity of cryogenic radiometer

YI Xiao-long; YANG Zhen-ling; YE Xin; WANG Kai; FANG Wei; WANG Yu-peng

doi:10.3788/OPE.20152310.2733

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Absorptance measurement for sloping bottom cavity of cryogenic radiometer

Modern Applied Optics | 更新时间：2020-08-13

- Absorptance measurement for sloping bottom cavity of cryogenic radiometer
- Optics and Precision Engineering Vol. 23, Issue 10, Pages: 2733-2739(2015)
- 作者机构：
  
  中国科学院长春光学精密机械与物理研究所,吉林长春,中国,130033
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20152310.2733
  CLC： P414.5;P422.1
- Received：09 January 2015，
  
  Revised：24 March 2015，
  
  Published：25 October 2015
- 稿件说明：
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衣小龙, 杨振岭, 叶新等. 低温辐射计斜底腔吸收比测量[J]. 光学精密工程, 2015,23(10): 2733-2739

YI Xiao-long, YANG Zhen-ling, YE Xin etc. Absorptance measurement for sloping bottom cavity of cryogenic radiometer[J]. Editorial Office of Optics and Precision Engineering, 2015,23(10): 2733-2739
衣小龙, 杨振岭, 叶新等. 低温辐射计斜底腔吸收比测量[J]. 光学精密工程, 2015,23(10): 2733-2739 DOI： 10.3788/OPE.20152310.2733.

YI Xiao-long, YANG Zhen-ling, YE Xin etc. Absorptance measurement for sloping bottom cavity of cryogenic radiometer[J]. Editorial Office of Optics and Precision Engineering, 2015,23(10): 2733-2739 DOI： 10.3788/OPE.20152310.2733.

摘要

考虑在轨绝对辐射定标基准辐射计(ARCPR)要求其测量太阳总辐照度(TSI)的TSI腔的吸收比优于0.999 9

同时测量不确定度在0.001%以下

本文提出采用在空间和低温环境下性能优越的圆柱形斜底腔作为标定太阳总辐照度的黑体腔

并对斜底腔吸收比进行了测量与研究。介绍了斜底腔的特性

分析了低温辐射计多使用斜底腔作为黑体腔的原因。阐述了替代法测量腔体吸收比的原理

增加了参考光路用于监测激光功率

以提高测量重复性和准确性。通过测量信号与参考光路信号的比值计算了斜体腔的吸收比

并对测量结果进行了不确定度分析。测试实验显示

斜底腔吸收比为0.999 9280.000 005

优于ARCPR对标定黑体腔的要求

验证了将斜底腔作为测量太阳总辐照度的TSI腔的可行性。实验还表明:计算信号电压与参考电压比值

通过比值计算腔体吸收比的方法可以提高测量结果的不确定度

适用于测量超高吸收比腔体的吸收比。

Abstract

The Total Solar Irradiance (TSI) cavity in an Absolute Radiance Calibration Primary Radiometer(ARCPR) for space remote sensing should have an absorptance more than 0.999 9 and the measurement uncertainty superior to 0.001%. Therefore

a cylindrical sloping bottom cavity was used as a receiver cavity for calibration of the TSI because of its superior performance in the space and cryogenic environments. Then

the absorptance of the cylindrical sloping bottom cavity was measured. The characteristics of the cylindrical sloping bottom cavity were introduced

and why the cavity was used as the receiver cavity in cryogenic radiometer was analyzed. Furthermore

the principle of the absorptance measured by a substitution method was expounded. A reference light path was added to monitor the stability of a laser to improve the measurement repeatability and accuracy. Finally

the absorptance of sloping bottom cavity was measured using this method

and the uncertainty of measurement results was analyzed. Experimental results indicate that the absorptance of sloping bottom cavity is 0.999 9280.000 005

superior to that of the calibration standard of the blackbody cavity

which verifies it is feasibility to use the sloping bottom cavity as the TSI cavity for measuring the TSI. The experiments also verify that the ratio of single voltage and reference voltage could be used to calculate the cavity absorptance

and could improve the uncertainty of measurement result. This method is fit for measuring the absorptance of an ultra high absorptance cavity.

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references

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