These can be "dragged out" of rulers, providing a vertical or horizontal line to reference as you place components on the workspace.
可以从标尺“拖出”这些线,作为在工作区上放置组件时的垂直或水平参考线。
2
The expression of complex amplitude is given in reference plane vertical to the optical axis by far-field approximation when the line source and the principal axis are at any Angle.