Novel measurement method for measuring 3-D contour

When a straight-line grating with sinusoidal intensity distribution is projected on an object, the surface height distribution is translated into a phase distribution of the deformed grating. A novel, simple and effective method was put forward to demodulate the phase and translate it into the surface height information with its working principle. The distinguished advantages of the method are that it only needs simple instrument and is insensitive to the environmental noise, furthermore, its measurement speed is fast, hence it's useful for testing on-line objects.

Duke Scholars

Author Feng Tian DKU Faculty