A Moiré pattern is a large-scale pattern produced by the geometric superposition of similar but slightly offset templates. A simple example is obtained by taking two identical ruled transparent sheets of plastic, superposing them, and rotating one about its center as the other is held fixed.
Moiré patterns can also be created by plotting series of curves on a computer screen. Here, aliasing arises from sampling
the curves on the discrete pixel grid. For example, the
illustrations above show concentric circles
plotted with a range of uniform spacings. Note the phantom lines and curves
that appear.
