图 a)所示为情况一,W形轴锥镜与准直单元之间产生一个位移差β。图b)所示为情况二,W形轴锥镜在安装过程中发生倾斜,准直单元的光轴与W形轴锥镜的光轴之间产生一个角度θ。
Figure a) shows case one, where a displacement difference β is generated between the W-axis tapered mirror and the collimation unit.
The W-axis tapered mirror is tilted during installation, and an angle θ is generated between the optical axis of the collimation unit and the optical axis of the W-axis tapered mirror.