A Study on Radial Electronic Shearography for Measuring Amplitudes of Vibration of Symmetrical Objects

대칭형 물체의 진동 진폭 분포 측정을 위한 레이디얼 전단 간섭계에 대한 연구

In this paper, a newly radial electronic shearography system was developed in order to study vibration characteristics of symmetrical objects. We utilized the electro-optic holography theory for quantificational analysis and a porror prism for shearing two inages radially in this study. These image data obtained by this shearography give us various distributions of the gradient of vibration amplitude, and they are useful informations to study vibrational characteristics of symmetrical objects. Finally this developed system with phase stepping and modulation was applied to fans and disks to inspect characteristics of the vibration and the blance of symmetrical objects and obtained good results.