secondary optical axis

例句：

1. 1.The camera's secondary optical axis isaligned with the lens.
   相机的次要光学轴与镜头对齐。
2. 2. The scientistused a secondary optical axis to measure thedistance between objects.
   科学家使用一个次要光学轴来测量物体之间的距离。
3. 3. Thenew design uses a secondaryoptical axis to improve image quality.
   新设计使用了次要光学轴来提高图像质量。