DIFFERENTIAL DIGITAL HOLOGRAPHY IN QUALITY CONTROL

• Published in: Tehnički vjesnik Vol. 18; no. 2; pp. 193 - 201
• Main Authors: Nenadic, K, Keser, T, Jovic, F
• Format: Journal Article
• Language: English
• Published: 01.06.2011
• Subjects: Defects; Digital; Errors; Holograms; Holography; Quality control; Three dimensional
• ISSN: 1330-3651

This paper describes a method of differential digital holography applicable in quality control for some manufacturing processes. The proposed method is able to differentiate 3D objects without production defects and similar 3D objects with production defects. Holograms of all objects are created using off-axis laboratory setup. Computer is used to compare holograms or difference holograms and determine whether the manufactured object has some defect or no defect. Production defects can be in the form of pattern errors or in the form of surface bumps. Amodel of production setup for implementation in manufacturing processes is proposed.Original Abstract: U radu se opisuje metoda diferencijalne digitalne holografije koju je moguce primijeniti u kontroli kvalitete u nekim proizvodnim procesima. Predlozena metoda moze razlikovati 3D objekte bez ostecenja i iste objekte ali s nekim ostecenjem koje se pojavilo tijekom proizvodnje. Snimaju se hologrami svih objekata na vanosnom laboratorijskom postavu. Racunalo se koristi za usporedbu holograma ili razlike holograma i odredivanje ima li proizvedeni objekt neko ostecenje ili gresku. Pogreske mogu biti u vidu pogresaka u teksturi na povrsini proizvoda ili u obliku nepravilnog reljefa proizvoda. Predlozen je model postava za proizvodnju u industrijskim procesima.