National Repository of Grey Literature 3 records found  Search took 0.00 seconds. 
Hybrid reactive HiPIMS deposition system for the deposition of functional metal oxide thin films
Hubička, Zdeněk ; Čada, Martin ; Olejníček, Jiří ; Kšírová, Petra ; Tvarog, Drahoslav
The report describes a hybrid reactive HiPIMS deposition system for the deposition of functional metal oxide thin films with defined optical properties.
Computer Generated Holograms
Tvarog, Drahoslav ; Jákl, Petr (referee) ; Kotačka, Libor (advisor)
The presented Diploma thesis deals with the computer-generated diffractive structures or rather called computer generated holograms (CGH). We follow basic principles of classical holography and in the context of which we define a synthetic holography. We then show various types of digital holograms and methods of measurement of their quality. We deal with several iterative algorithms useful for computation of the Fourier transform as well as with methods of phase quantization. In the second part of the work, we describe briefly our computer code for iterative Fourier transform computation. With respect to the mentioned techniques, we further present the usability of the method for design of computer generated holograms in reflection regime. After a short introduction to the electron beam lithography and its exploitation for the origination of computer generated diffractive optical elements. We analyze reconstructions of produced holograms and evaluate its quality.
Synthetic Holography
Tvarog, Drahoslav ; Chmelík, Radim (referee) ; Kotačka, Libor (advisor)
The thesis presents method of a creation of computer-generated holograms. The first part is devoted to an introduction of theoretical principles of a generation of synthetic holograms. The second part of the discourse deals with several practical methods of synthetic holograms creation. We present a computer code computing a discrete Fourier transform of an input image. The output of the code is an image matrix binarized in a specifically given way and printed on a transparent slide. When reconstructing the synthetic hologram we initially illuminate the slide with CGH by a plane wave and a reconstructed pattern is magnified through a camera objective to obtain a pattern observable by naked eyes. Finally, we analyze the quality of reconstructed pictures obtained from the synthetic holograms.

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