Williams C S
Appl Opt. 1973 Apr 1;12(4):872-6. doi: 10.1364/AO.12.000872.
A simple, single-mode, coherent Gaussian laser beam with wavefronts that are spherical as they pass through a reference plane is assumed, and then by using only the Huygen's principle and scalar diffraction theory, the propagation characteristics are found, and the formulas for the beam at a distance from the reference plane are derived. The action of a lens on a wavefront is discussed, and the lens formula is derived.
假定有一束简单的、单模、相干高斯激光束，其波前在通过参考平面时呈球面状，然后仅利用惠更斯原理和标量衍射理论，求出其传播特性，并推导出离参考平面一定距离处光束的公式。讨论了透镜对波前的作用，并推导出透镜公式。
