针对多视场定焦距CCD摄像系统按照传统光机结构设计方法造起各光轴平行性容易偏移和系统占用空间较大等问题，提出多视场定焦距CCD摄像系统的光机结构可以以一个精密铸件为基体，铸造出每个视场的内腔毛坯形状，通过数控机械加工和可靠的装调方法保证各视场光轴的平行性和稳定性。装调完成后进行冲击和振动试验，结果表明：该多视场定焦距CCD摄像系统各视场光轴的平行性误差不大于0.2 mrad；各视场光轴的稳定性误差不大于0.1 mrad。因此，该结构设计方法是可行的，它具有结构紧凑、体积小，各光轴平行性和稳定性容易保证，可靠性高等特点。

In order to solve the problems of more deviation of optical axis and larger space occupancy induced by traditional structural method, this paper presents a CCD camera with the structure of multiple fields of view(FOVs) and fixed focal length which is based on a precision casting to cast the inner rough shape of every FOV in the casting. Through the numerical control (NC) machining and the reliable assembling and adjustment method, the parallelism and stability of optical axis for this system are guaranteed efficiently. Impact and vibration tests are carried out and the measurement results show that the optical-axis parallelism error of the multiple FOV system is less than 0.2mrad; its optical-axis stability error is less than 0.1mrad. So the structure design method is feasible and effective .It has the advantages of compact structure, lighter weight, more reliable optical-axis parallelism and stability, high reliability.