光学 精密工程, 2013, 21 (3): 608, 网络出版: 2013-04-08   

绝对光谱辐照度仪的波长定标

Wavelength calibration of absolute irradiance spectra-radiometer
作者单位
中国科学院 安徽光学精密机械研究所 中国科学院通用光学定标与表征技术重点实验室, 安徽 合肥 230031
摘要
为了提高太阳绝对光谱辐照度仪的波长定标精度, 提出了用线阵CCD作为位置传感器进行波长定标的方案, 完成了0.4~1.0 μm波长的定标。根据仪器的安装结构和Fèry棱镜的参数, 描述了波长与CCD像元的对应关系, 制定了定标与计算方法, 并介绍了器件的选型及线阵CCD的时序驱动和输出信号的处理。在室内波长定标中, 利用可调谐激光器作为光源, 确定了CCD像元与中心波长的对应关系, 并通过光谱扫描进行了验证。在室外开展了太阳观测实验, 并与可见-短波红外光谱仪做了对比。实验结果表明, 波长定位精度优于0.5 nm, 测量的光谱曲线吸收峰与大气典型吸收谱线吻合, 同时验证了波长定标方案的可行性与CCD电子学设计的合理性。
Abstract
To improve the wavelength calibration accuracy of a solar absolute irradiance spectra-radiometer, a wavelength calibration scheme that a linear CCD was used as position sensor to control the wavelength was presented. The wavelength calibration was implemented from 0.4 μm to 1.0 μm. Based on the install configuration of the instrument and the parameters of Fèry prism, the relationship between wavelength and CCD pixels was described and the calibration and calculation methods were depicted in detail. The selection of devices, the designs of a clock driver and an output signal processor for CCD were introduced. For wavelength calibration in a lab, a tunable laser was used as source, and the relationship between CCD pixels and center wavelength was confirmed and verified by spectral scanning. Furthermore, the outdoor measurement was developed and the results were compared with that of a visible-short wave infrared spectrometer. Experimental results indicate that the precision of wavelength orientation is better than 0.5 nm, and the absorbing peak of spectral curve measured is accord with the absorbing spectra of typical atmosphere exactly. The feasibility of spectral scanning scheme and the reasonability of electronic design of CCD were demonstrated finally.

刘恩超, 郑小兵, 李新, 张艳娜. 绝对光谱辐照度仪的波长定标[J]. 光学 精密工程, 2013, 21(3): 608. LIU En-chao, ZHENG Xiao-bing, LI Xin, ZHANG Yan-na. Wavelength calibration of absolute irradiance spectra-radiometer[J]. Optics and Precision Engineering, 2013, 21(3): 608.

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