Analytical expressions describing the moire fringes formed by two periodic structures consisting of the evolutes of a circle are derived. The circular and radial moire patterns can be formed by contact and noncontact superimposition of the structures. In the latter case the self-imaging phenomenon is used. Experimental verification and proposals for use are given.
© 1989 Optical Society of America
Piotr Szwaykowski and Krzysztof Patorski, "Moire fringes by evolute gratings," Appl. Opt. 28, 4679-4681 (1989)