Transformation of a Foucault Shadowgram into the Geometrical Model of a Shear Interferogram by Means of Isophotometry

摘要

The principles of transformation of a Foucault shadowgram into a quantitative map of wave-front deformation based on creation of a system of isophotes are unveiled. The presented studies and their results prove that there is a high degree of correspondence between a Foucault shadowgram and the geometrical model of a shear interferogram with respect to displaying wave-front deformations.