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本文对氢脉泽传统的束光学系统提出了应用四极锥形内孔的短态选择器和双聚焦态选择器两种改进设计．推导了四极锥形态选择器束光学系统的设计公式，为实际设计需要提供了一定理论依据，经分析计算，它与六极态选择器相比，有效利用束流，聚焦速度快，缩短了原子束轨道．双聚焦态选择器排除了不需要的F＝1，mF＝1能级的原子，使进入储存胞的原子为振荡所需的F＝1；mF＝0上的有用原子，降低了原子自旋碰撞效应，使线宽减小．新的原子束光学系统有利于氢脉泽性能的提高．
In this paper, we propose two improved designs for the traditional beam optical system of hydrogen maser by using the quadrupole conical borehole short-state selector and the dual-focusing state selector. The design formula of the quadrupole cone beam selector optical system is deduced, which provides a theoretical basis for the actual design requirements. Compared with the six-pole selector, the quadrupole beam selector makes efficient use of the beam current with fast focus and shortened Atomic beam trajectory. The dual-focus state selector eliminates the unwanted atoms of the F = 1, mF = 1 level such that the atoms entering the storage cell are required for oscillation, F = 1; the useful atom at mF = 0 reduces the atomic spin Collision effect, to reduce the line width. The new atomic beam optical system is conducive to the improvement of hydrogen maser performance.