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qsj98:三种方法仅供参考: 4^_'LiX3[ 1. 考查系统出射光线平行性; P~M<OUg 2. 加理想透镜,其焦距等于系统焦距; ]?lUe5F 3. 光路反向计算,即系统倒置,从无穷计算到焦平面。....... (2013-07-31 22:50) ^!rAT1(/_