Lord Rayleigh1842–1919
Moiré fringes to test gratings, 1874
English physicist who in 1881 explained Talbot’s self-imaging gratings, predicting the distance at which the pattern repeats.
Moiré
Two regular drawings overlap. Their slight mismatch creates broad bands that belong to neither layer. Drag the second layer, or turn it a fraction, and the apparent pattern changes.
About this pattern
Geometric moiré · superposed periodic patterns
These are actual superimposed lines, not a painted interference texture. Rings respond strongly to displacement; parallel and hexagonal lattices respond to rotation and pitch mismatch. Very dense settings can also interact with the screen's pixel grid; the SVG retains the original lines.
Behind the mathematics