The bounds on the sensitivity and resolution of moiré deflectometry caused by diffraction effects are derived from the wave equation. It is shown that Fresnel diffraction is a necessary and sufficient framework for treating these effects. Expressions are given for angular resolution, spatial resolution, and dynamic range. The proper selection of experimental parameters involves a trade-off between the angular resolution on the one hand and spatial resolution and dynamic range on the other.
© 1985 Optical Society of America
E. Keren and O. Kafri, "Diffraction effects in moiré deflectometry," J. Opt. Soc. Am. A 2, 111-120 (1985)