Fringe Spacing And Strain Analysis Using Laser Moire Fringe Projection Technique

The spacing between fringes is crucial for testing materials based on Moir´e technique.rnIn this work, the spacing between two consecutive bright (or dark) fringes, C , isrndetermined, for different grating separation , . The behavior shows that as the anglernbetween the gratings increases, the fringe spacing decreases. For gratings of 100rnlines/mm and 300 lines/mm pitches adjusted parallel to each other, it is confirmedrnthat the fringe spacing equals 0.005000 mm. This is equal to the value for beat.rnMoreover, a moir´e fringe projection technique applicable for deformation measurementrnis done experimentally. The results show that moir´e fringe projection techniquernis suitable for deformation analysis

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