应用波前编码技术提高空间相机的稳健性  

Applying Wavefront Coding Technology on Enhancing Robustness of Space Camera

作　　者：安宁[1] 张秉隆[1] 金建高[1] 李博[1] 

机构地区：[1]北京空间机电研究所,北京100094

出　　处：《光学学报》2015年第9期129-134,共6页Acta Optica Sinica

基　　金：国家自然科学基金(11304012)

摘　　要：通常情况下,焦面在光学系统焦深范围内移动,空间相机像质变化较小,一旦移出焦深范围,像质将出现不同程度的下降。波前编码(WFC)成像技术具有很好的扩展焦深功能,能够使光学系统表现出离焦不敏感的特性。采用了扩展多项式在光瞳处引入三次相位分布,以光学传递函数作为系统像质衡量准则构建了自定义评价函数,进行了波前编码光学系统的设计,并搭建了实验装置。实验结果表明,复原后的波前编码图像不仅与原系统成像质量相当,并且在较大的焦深范围内保持一致,验证了波前编码技术提升空间相机稳定性的可行性。In normal conditions, image quality of space camera optical system changes very little in a permissible range of depth of focus, which will appear different degrees of falling when the image plane is out of depth of focus however. The wavefront coding technology （WFC） can extend the depth of focus very well, and enable the optical system to be insensitive to defocus. The user-defined merit function using modulation transfer function as image quality guideline is proposed based on extended polynomial to import cube phase distribution in the pupil, the optical system is designed of WFC system, and the test device is builded. The test results show that the image of WFC system is not only correspond to image of original system, but also keeps stably in a big range of depth of focus, which proves the big value of WFC on enhancing the stability of space camera.

关 键 词：成像系统 波前编码 三次相位板 光学设计 

分 类 号：V443.5[航空宇航科学与技术—飞行器设计]