Abstract

This paper proposes a method of diffraction monitoring based on illuminating the test object with a pair of wave fronts propagating at an angle to each other. It is established that such illumination results in the formation of a moiré pattern whose form is associated with the geometrical parameters of the test object. The possibility of using this method to monitor the thickness of objects is considered.

© 2010 Optical Society of America

Geometric parameters of moiré fringes

S. Yokozeki, Y. Kusaka, and K. Patorski
Appl. Opt. 15(9) 2223-2227 (1976)

Visibility minimization of the moiré pattern on a display screen by optimizing geometrical parameters using an F/θ plot

Victor Yurlov, Tae Young Kim, Kyunghun Han, Nan Ei Yu, Young-Joo Kim, and Marzieh Pournoury
J. Opt. Soc. Am. B 35(10) 2562-2573 (2018)

Diffraction effects in moiré deflectometry

E. Keren and O. Kafri
J. Opt. Soc. Am. A 2(2) 111-120 (1985)

Direct determination of strain with diffraction-limit accuracy by moiré deflectometry

Oded Kafri, Eliezer Keren, and Kathi M. Kreske
Opt. Lett. 14(4) 193-195 (1989)

Measurements of phase objects using the Talbot effect and moiré techniques

Yoshiaki Nakano and Kazumi Murata
Appl. Opt. 23(14) 2296-2299 (1984)