The collimation and focus systems discussed in this paper are the important components of the synchronal radiation equipment which can change the direction of X ray and focus it.

• 同步辐射是生物大分子研究中所使用的重要方法,本文讨论的准直镜和聚焦镜系统是生物大分子光束线中的重要装置,其作用是改变X射线的方向并使其聚焦。