Ronchi L
Appl Opt. 1973 Jan 1;12(1):93-7. doi: 10.1364/AO.12.000093.
Modes and resonances of an open resonator formed by two roof mirrors with roof angle smaller than pi/2 are investigated. It is shown that modes exist that are limited by a caustic surface in such a way that they are exponentially low in the region of the edges of the mirrors, so that the diffraction at the edges can be neglected. Such modes and resonant frequencies are expressed in terms of modes and resonances of the flat-roof resonators.
研究了由两个顶角小于π/2的屋脊镜形成的开腔的模式和共振。结果表明,存在一些模式,它们受到焦散面的限制,使得它们在镜边缘区域呈指数级衰减,从而可以忽略边缘处的衍射。这些模式和共振频率可以用平顶共振器的模式和共振来表示。