Abstract

A method for automatically determining in real time the absolute order of shadow moiré fringes is developed. The intensity variations on an object surface caused by a light source moving with constant speed are analyzed by fast-Fourier-transform methods. Experimental results show that this procedure can be successfully applied to shadow moiré topography and does not require object surface continuity.

© 1989 Optical Society of America

Shadow moiré technology based fast method for the measurement of surface topography

Hong Zhao, Hubing Du, Jing Li, and Yuwei Qin
Appl. Opt. 52(33) 7874-7881 (2013)

Automatic calibration method for phase shift shadow moire interferometry

Joris J. J. Dirckx and W. F. Decraemer
Appl. Opt. 29(10) 1474-1476 (1990)

Determination of the absolute order of shadow moiré fringes by using two differently colored light sources

Keun Cheol Yuk, Jae Heung Jo, and Soo Chang
Appl. Opt. 33(1) 130-132 (1994)

Moiré topography by slit beam scanning

Seung-Woo Kim and Hyun-Goo Park
Appl. Opt. 31(28) 6157-6161 (1992)

Systematic errors in small deformations measured by use of shadow-moiré topography

Hanif M. Ladak, Willem F. Decraemer, Joris J. J. Dirckx, and W. Robert J. Funnell
Appl. Opt. 39(19) 3266-3275 (2000)