Max-planck-gesellschaft Zur F&#xf6;rderung Der Wissenschaften E. V.

Innoview Sarl

Universitá Della Svizzera Italiana (Usi)

Vahid Babaei

Roger David Hersch

Hans-Peter Seidel

Sebastian Cucerca

Artin Saberpour Abadian

Rhaleb Zayer

Piotr Didyk

A method for preparing a laser marking system to create a colored laser mark on a specimen by providing a laser marking system and a specimen comprising a surface layer, where the laser marking system has a preset number of laser parameters, and performing an exploration of a first gamut specified by the laser marking system and the specimen. The method further generally comprises creating a design space with a preset number of design points; performing a marking of a sample on the specimen for each design point; measuring the sample using at least one detection device and determining a performance point for each design point; evaluating the performance space with regard to preset performance criteria using an evaluation device; generating an offspring design space with offspring design points; and creating a first gamut using a subset of performance points.

Method for creating a colored laser marking

Moiré is an appealing visual effect observable when two or more repetitive patterns are superposed. We introduce a method for designing and fabricating level-line moirés on curved surfaces. These moiré shapes are obtained by superposing a partly absorbing or partly light deviating curved base layer and a curved revealing layer formed by a grating of transparent lines or cylindrical lenses. The distances between base layer and revealing layer are adapted to the locally varying distances between successive transparent lines or cylindrical lenses of the curved revealing layer grating. We demonstrate the quality of our method by rendered simulations and by fabrication. The resulting level-line moiré display devices can be manufactured using different fabrication techniques, from multi-material 3D printing to molding.

Fabrication of moiré on curved surfaces

Growing community of inventors

Saarbrücken, Germany

Vahid Babaei