【摘要】 为了实现任意球面元件的超高反射率测量,提出直腔和折叠腔两种光腔结构,以实现0°,10°,15°和30°等不同角度下球面元件的超高反射率测量。详细分析了这两种测量方式,根据光束传输变换公式,推导了任意球面元件在测量中引入的衰荡光腔物理腔长的变化,得到了实验测量中腔长调节指导。并根据光腔衰荡法原理,推导了球面元件在超高反射率测量中的通用数学表达式,对测量公式进行了讨论,分析结果扩展了光腔衰荡法在元件超高反射率测量的使用范围。更多还原

【Abstract】 In order to measure super-high reflectivity of any sphere optical element at different angles,such as 0°,10°,15°,30° and so on,two optical resonator structures are put forward: one is straight-cavity,and the other is folded-cavity.Physical length of the ring-down cavity is defined based on the concept of light path.These two kinds of measurement methods are analyzed in detail.When spherical surface is put in the ring-down cavity,it brings length misalignment of the ring-down cavity.This varied length is derived based on the beam transmission and transformation law,which can be used as length adjustment guidance of the ring-down cavity for reflectivity measurement.In addition,according to reflectivity measuring principle of cavity ring-down,mathematical expressions of reflectivity measuring for spherical components are deduced at different angles,which are discussed separately.The results expand the super-high reflectivity measurement scope of optical elements for the cavity ring-down method.更多还原