Multiple degrees of freedom mechanical interleaving stitching method of CCDs for aero-camera

With the rapid development of relative technologies, the aero-cameras are developing in the direction of high resolution and large field of view. The existing CCDs cannot meet the requirement of large field of view． So, high-precision, multi-degree of freedom stitching technology has become an urgent demand for the current development． By comparing existing stitching technology, a multiple degrees of freedom mechanical interleaving stitching method which was different from traditional mechanical stitching and optical stitching methods were designed. The multiple degrees of freedom stitching machine with three points of cam was used to replace the traditional way of adjusting shims. So stitching can be adjusted in real time online. The analysis result shows that the method has a stitching error of less than 2m, a coplanar error of less than 5m． It can meet the imaging requirement of the camera. Modal simulation and modal experiment show that the resonant frequency of the structure of the first order is greater than 390 Hz, it can meet the requirements.