2枚のスペックルパターンのみを用いたスペックル干渉計測法の精度向上

摘要

The fringe analysis technology using only two speckle patterns before and after a deformation has been proposed. Furthermore, three dimensional deformation measurement system is constructed by using this novel speckle interferometry. However, when this system is applied to the measurement of deformation in buckling phenomenon, it is confirmed that there are some troubles by the multi-recording technology and the distribution of speckle noise. In this paper, the pre-treatment in speckle interferometry for reducing such errors is proposed by discussing the error sources of such troubles concerning measurement accuracy. The influence of the error source is reduced by the proposed method.