Browsing by Author "Kovachev, Metodi"

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    Design and implementation of a DMD based volumetric 3D display
    (IEEE, 2008-05) Yücesoy, Veysel; Tunaoǧlu, Doruk; Kovachev, Metodi; Ilieva, Rossitza; Onural, Levent
    A real image swept-volume volumetric display is developed. A piston type moving screen is used to obtain the desired volume. A commercially available DMD device is used to project 2D slices of a 3D frame. There is a varying magnification effect during the projection because of the optical design of the system; raw 3D video frames are processed by a software to generate the appropriate 2D slices by also correcting the magnification. Synchronization between the hardware and the software is achieved via a microcontroller. The overall system is capable of printing 12 3D frames per second where a 3D frame consists of 90 2D slices with a resolution varying from 512x512 to 450x450 (approx. 20M voxels per one 3D frame). Although some flickering effect is observed due to rather low 3D frame rate, results are visually satisfactory. ©2008 IEEE.
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    Holographic 3DTV displays using spatial light modulators
    (Springer, 2008) Onural, Levent; Kovachev, Metodi; Ilieva, Rossitza; Esmer, G. Bora; Reyhan, Tarık; Benzie, P.; Watson, J.; Özaktaş, Haldun M.; Onural, Levent
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    Reconstruction of computer generated holograms by spatial light modulators
    (Springer, 2006) Kovachev, Metodi; İlieva, Rossitza; Onural, Levent; Esmer, Gökhan Bora; Reyhan, Tarık; Benzie, P.; Watson, J.; Mitev, E.
    Computer generated holograms generated by using three different numerical techniques are reconstructed optically by spatial light modulators. Liquid crystal spatial light modulators (SLM) on transmission and on reflection modes with different resolutions were investigated. A good match between numerical simulation and optically reconstructed holograms on both SLMs was observed. The resolution of the optically reconstructed images was comparable to the resolution of the SLMs.