外部导入激光的积分球辐射源的研制  

Development of laser illuminated integrating sphere source

作　　者：徐秋云[1] 郑小兵[1] 李健军[1] 张伟[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所遥感室,安徽合肥230031

出　　处：《光学精密工程》2009年第4期738-744,共7页Optics and Precision Engineering

基　　金：国家863高技术研究发展计划资助项目(No.2007AA12Z106)

摘　　要：为了满足光谱辐射遥感器的定标需求,研制了一种新型的外部导入激光的积分球辐射源。这种积分球辐射源不仅完全满足辐亮度响应度定标对定标光源的要求,而且可以对高光谱、超光谱仪器的光谱辐射响应度进行精细扫描。通过导入单波长激光对积分球辐射源的基本辐射特性进行了研究,测试结果表明,这种积分球辐射源的辐亮度非稳定性在0.5 h内为0.09%;平面非均匀性在积分球出口中心Φ63 mm内为0.16%;±22°范围在水平面内和垂直面内的角度非均匀性分别为1.8%和0.7%。由于其具有光谱辐通量高、单色性好、波长准确性高、可宽波段调谐等优点,可以在辐亮度模式下直接标定仪器的光谱辐亮度响应度。For calibration of a recent developded spectral radiation remote sensor, a new integrating sphere radiation source with an illuminated outside laser was developed. The radiation source not only could meet the demand of the calibration for radiance responsivity, but also could scan the spectral responsivity of hyperspectral detectors accurately. A single-wavelength laser was illuminated to research the basic radiometric characteristics of the integrating sphere source. The results show that the radiance instability of the radiation source is 0.09% in half an hour, the radiance plane nonuniformity is spatially 0.16% in the central region of the sphere exit port,and the angular nonuniformity in horizontal and vertical planes within a range of ±22° are 1.8% and 0.7% respectively. These results indicate that the proposed system can calibrate directly the spectral radiance responsivity for optical instrumerts under the radiance mode, for it has advantages of higher spectral flux, lower wavelength uncertainty, and wider tunable source wavelengths.

关 键 词：积分球 激光 定标 光谱辐亮度响应度 

分 类 号：TP73[自动化与计算机技术—检测技术与自动化装置] O432.2[自动化与计算机技术—控制科学与工程]