According to Kirchhoff's scalar diffraction theory, with the ray tracing method, a continuous relief mask for diffractive focus lens has been designed.
基于基尔霍夫标量衍射理论，采用光线追迹法设计了连续型平面衍射聚光透镜掩模。
2
Electromagnetic field theory based on Maxwell's equations (field method) and circuit theory based on Kirchhoff's laws (circuit method) are the main tools to analyze transmission line problems.