It investigates the focal switch phenomenon of a tilted phase l - g beam passing through a system with the aperture and lens separated 摘要研究了相位倾斜l - g光束通过光阑透镜分离系统的焦开关现象。
2.
New infection of truncation parameter on focal shift and focal switch is investigated when studying laguerre - gaussian ( l - g ) beams passing through an aperture - lens separate optic system 摘要以拉盖尔高斯( l - g )光束通过光阑透镜分离的光学系统为例，研究了截断参数对焦移量和焦开关的影响。
3.
The numerical results show that the appearance of focal switch rests not only on the distance of aperture and lens but also on truncation parameter ; focal switch possibly occurs only when truncation parameter is between its critical maximum and minimum truncation parameters 数值结果表明：焦开关的出现不仅与光阑透镜分离量有关，还与截断参数值密切相关；仅当截断参数取某一上、下限之间的值时，才可能出现焦开关。
