1·Telecentric lens has parallel chief ray with its optical axis and is ideal for co-axial lighting.
远心镜头拥有与它的光轴平行的主光线，同轴照明是非常理想的。
2·The relation between the stress along the optical axis of trigonal crystallographic system and the refractive index is established.
运用折射率椭球分析晶体的弹光效应，给出了三方晶系沿光轴方向的应力与折射率的变化关系。
3·An algorithm for the resection of imagery along the optical axis is presented to implement both of the camera calibration and resection at the same time.
提出了一种沿主光轴方向影像的单像空间后方交会方法，实现了相机检校和空间后方交会的同时进行。
4·A novel noncontact scanner that scans the inspected part's surfaces by changing the Angle between laser plane and optical axis is designed based on optical triangulation.
本文基于光学三角法测量原理，设计了一种通过改变光平面与成像光轴夹角来实现对视场内被测零件表面扫描的视觉测头。
5·The method of tuning is rotating the wave-plate by the axial direction parallel to the optical axis.
调谐的方法是使石英波片绕平行于光轴的轴向转动。