Multivariate Function Extreme Value Based Calculations of the Defocused Amount of Expending Telescope
Ruijie Wang · Journal of Yunnan Normal University · 2009
There are several methods that can be used to calculate defocused amount as a fundamental mode Gaussian beam passes through a expending telescope,such as Lagrange method of undetermined multiplicator,equivalent transformation of thick lens,separating segments calculation,and so on.However,these methods are generally very complex.In this paper we will first prove that the defocused amount of expending telescope is not belonging to conditional extremum on the basis of theoretic analysis on Lagrange method of undetermined multiplicator.Then we will present a new calculation method,multivariate function extreme value based method,to determine the defocused amount.