displacement meters is less than 0.1 mm when the camera angle is vertical direction 30 and horizontal direction 30 . They are 1/200 and 1/100 of the pitch of the grating, respectively. It is confirmed that the effectiveness of a deformation distribution measurement from oblique direction using sampling Moire method. The error occurred periodically. It has an ability to reduce the error with finding out the cause of the periodic error. Fig. 22.9 Displacement distribution results (a) 0 , (b) Horizontal direction 60 , (c) Vertical direction 30 and horizontal direction 30 Fig. 22.8 Images of displacement distribution. (a) 0 , (b) Horizontal direction 60 , (c) Vertical direction 30 and horizontal direction 30 202 D. Tomita et al.
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