摘要
针对目前空间光学遥感器向着大口径、高精度方向发展相应需要大出光面的积分球辐射光源,本文研制了一种大口径空间相机用积分球辐射定标光源,并使用自制的积分球辐射性能测试装置测试了大口径积分球光源的均匀性、余弦特性和稳定性。研制的积分球辐射定标光源内径为3000mm,出光面直径为1 000mm。测试结果表明,积分球的最大幅亮度为240.13 W·m-2·sr-1,辐亮度调节范围为371.5∶1,辐亮度不稳定性为0.04%/h,光源出口面非均匀性为1.7%,辐射定标光源的不确定度为5%。
This paper designs a large aperture integrating sphere radiometric source system. The laborato ry radiometric calibration is an important part during the development of the space optical remote sensor and its effect is to build the response function between input radiance and output electric signal. This process usually uses an integrting sphere as the radiometrie source. The principle of radiometric calibra- tion follows full aperture, full field of view and end to end. The extended radiometric source is the standard source of laboratory radiometrie calibration and is required to illuminate the camera with full aperture and full field of view, so it must have large hatch diameter and ideal cosine radiation performance. At present,the radiometric calibration device needs a large-scale integrating sphere. Systematically, this paper describes the design method and process of a large aperture integrating sphere. We test the radiation characteristics of the large aperture integrating sphere, including the uniformity, the stability, the cosine characteristics and the output uncertainty. The diameter of the integrating sphere is 3 000 mm and the opening diameter is 1 000 ram. The test results indicate that the output uncertainty of this system is 5 %.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2013年第3期464-469,共6页
Journal of Optoelectronics·Laser
基金
国家"863"高技术研究发展计划基金(863-2-5-1-13B)资助项目
关键词
遥感
积分球
均匀性
稳定性
余弦特性
不确定度
remote sensing
integrating sphere
uniformity
stability
cosine
uncertainty
