INTERFERENCE METHODS AND DEVICES OF LENS CENTERING CONTROL

A classification is given of the main methods of controlling the cente ring of lenses and lens systems. The advantages of interference method s of centering control are shown, and a detailed analysis of a number of interference devices, based on to the interference schemes of Newto n, Fizeau, Haidinger, Twyman-Green, Fabry-Perot, including shearing in terferometers, is given. The conditions of using various centering con trol schemes are determined, a comparative estimate of their accuracy characteristics is given, and the main directions of improvement of hi gh-accuracy interference systems of automated centering control are ou tlined.