光锥耦合对ICCD响应不均匀性的影响分析

Analysis on the Non-Uniformity of ICCD Caused by Fiber Optic Taper Coupling

为提高光锥耦合ICCD成像系统的光响应均匀性,对光锥耦合过程造成光响应不均匀性的机理进行了分析,并用微观图解的方法清晰剖析不均匀性的产生机理.从CCD光敏元、光锥纤维、像增强器光纤面板输出面的微观结构出发,通过实测图像合成,模拟再现了不均匀性的产生过程,分析了其主要因素,阐明了不均匀度的严重性,提出了通过减小光锥光纤直径改善ICCD的响应不均匀性的解决方案.

In order to improve the uniformity of fiber optically coupled intensified CCD （ICCD）, its mechanism of formafion is analyzed. A graphic method is adopted to demonstrate how the non- uniformity is caused. The microstructures of CCD pixels, fiber optic taper and intensifier fiber output panel are analyzed. The process of formation of non-uniformity is illustrated by the composition of real images and the main factors contributing to non-uniformity are described in detail. Severity of non- uniformity is revealed, and its solutions proposed so as to reduce the non-uniformity of ICCD by reducing the fiber diameter of fiber optic taper.