title: Moire fringes by evolute gratings.
abstract: 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.
authors.forename: P
authors.initials: P
authors.lastname: Szwaykowski
authors.forename: K
authors.initials: K
authors.lastname: Patorski