435408.fig.008a
(a)
435408.fig.008b
(b)
Figure 8: (a) Four-phase-stepped interference images captured on the CCD camera. Then, intensity profile is taken at places indicated by white dotted lines for cross-correlation. (b) Cross-correlation peaks of intensity profiles in images A, B, C, and D with that in image A. The peak separations give relative-stepped phases of each interference image. Simulated results of cross-correlations are shown with solid narrow lines.