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Zoltan Füzessy, Ferenc Gyimesi, Janos Kornis, Bela Raczkevi, Venczel Borbely, Balazs Gombkötö
Analogue and Digital Holography: Absolute and Comparative Measurements and Measuring Range Extension
Keywords: holography, interferometry, measuring range
In the paper a brief survey of research at the Department is given that had a twofold aim: to support the project DISCO in indirect and direct ways as well. In this respect the physical state of the art of the analogue basis of DISCO is discussed: principle of the comparative technique named difference holographic interferometry (DHI) is analysed and applications for comparative deformation and shape control in analogue holography are presented. Peculiarities of holographic illumination as well as requirements for repositioning of the master and test objects at comparative measurements are treated. Investigations of the measuring range extension in holographic interferometry are described. Detailed analysis is devoted to the puzzle-read-out extension technique. Finally, application of the principles of DHI in comparative deformation control by digital holography and the developed portable laboratory device for comparative deformation control are presented.
tm – Technisches Messen, Oldenbourg Wissenschaftsverlag
Print ISSN: 0171-8096
Volume: 73, 03/2006
Pages: 132 - 141