... （主）光轴principal optical axis 摄影主光轴 optical axis of camera 主光轴倾角 tilt angle of photographic axis ...
2
[光]?主光轴
... principal normal 主法线 principal optical axis 主光轴 principal period of calorimetric test 量热实验的主期 ...
3
?系统的主光轴
OO/： 系统的主光轴 （ principal optical axis ） 像方焦点(第二主焦点)：平行于光轴的入射光线的像点。
双语例句
1
The expression of complex amplitude is given in reference plane vertical to the opticalaxis by far-field approximation when the line source and the principal axis are at any Angle.