ABSTRACT
The French term “moiré” originates from a type of textile, traditionally of silk, with a grained or “watered” appearance. Nowadays, moiré is generally used to describe a fringe that is created by superposition of two (or more) patterns such as line gratings and dot arrays. Moiré phenomenon has been well known because it can be observed in our daily life, like the pattern seen in folded netting. Lord Rayleigh made the first scientific description of moiré phenomena in 1874. Since then, a lot of research papers have been reported in various scientific fields. The first generation of moiré research was mainly focused on the physical interpretation of moiré.1 The famous research papers by Oster and Nishijima suggested future availability of moiré techniques in scientific and industrial fields. At this point in time, we can review these works through a book compiled from selected papers on moiré.2 The second generation was focused on in-plane moiré, that is, 1D or 2D applications of moiré. Researchers in the field of experimental mechanics intensively investigated moiré applications to strain measurement. This technique is highlighted by the fact that both noncontact and full-field measurements are attainable.
