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Proceedings Paper

Extremely simple holographic projection of color images
Author(s): Michal Makowski; Izabela Ducin; Karol Kakarenko; Jaroslaw Suszek; Andrzej Kolodziejczyk; Maciej Sypek
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Paper Abstract

A very simple scheme of holographic projection is presented with some experimental results showing good quality image projection without any imaging lens. This technique can be regarded as an alternative to classic projection methods. It is based on the reconstruction real images from three phase iterated Fourier holograms. The illumination is performed with three laser beams of primary colors. A divergent wavefront geometry is used to achieve an increased throw angle of the projection, compared to plane wave illumination. Light fibers are used as light guidance in order to keep the setup as simple as possible and to provide point-like sources of high quality divergent wave-fronts at optimized position against the light modulator. Absorbing spectral filters are implemented to multiplex three holograms on a single phase-only spatial light modulator. Hence color mixing occurs without any time-division methods, which cause rainbow effects and color flicker. The zero diffractive order with divergent illumination is practically invisible and speckle field is effectively suppressed with phase optimization and time averaging techniques. The main advantages of the proposed concept are: a very simple and highly miniaturizable configuration; lack of lens; a single LCoS (Liquid Crystal on Silicon) modulator; a strong resistance to imperfections and obstructions of the spatial light modulator like dead pixels, dust, mud, fingerprints etc.; simple calculations based on Fast Fourier Transform (FFT) easily processed in real time mode with GPU (Graphic Programming).

Paper Details

Date Published: 6 February 2012
PDF: 6 pages
Proc. SPIE 8280, Advances in Display Technologies II, 82800V (6 February 2012); doi: 10.1117/12.909012
Show Author Affiliations
Michal Makowski, Warsaw Univ. of Technology (Poland)
Izabela Ducin, Warsaw Univ. of Technology (Poland)
Karol Kakarenko, Warsaw Univ. of Technology (Poland)
Jaroslaw Suszek, Warsaw Univ. of Technology (Poland)
Andrzej Kolodziejczyk, Warsaw Univ. of Technology (Poland)
Maciej Sypek, Warsaw Univ. of Technology (Poland)

Published in SPIE Proceedings Vol. 8280:
Advances in Display Technologies II
Liang-Chy Chien; Sin-Doo Lee; Ming Hsien Wu, Editor(s)

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