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Proceedings Paper

Liquid crystal display as spatial light modulator for diffractive optical elements and the reconstruction of digital holograms
Author(s): Guenther K.G. Wernicke; Sven Krueger; Hartmut Gruber; Nazif Demoli; Matthias Duerr; Stephan Teiwes
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Paper Abstract

Liquid crystal displays, originally designed and fabricated for projection systems, are often used as spatial light modulators in optical correlators or in fringe projection systems. Operating in a linearized phase mode, they can achieve a performance to be applicable as diffractive elements. An adapted driver electronics and adapting measurements of the phase modulation behavior can lead to a dynamic phase modulating system with an almost linear modulation and a maximum phase shift of 2(pi) . The electronic system can directly address the graphics card signal or can picture various video standards. So, computer generated holograms can be addressed at video frame rates. The limiting parameters of the performance are mostly due to physical boundary conditions, such as pixel number and size, response time, transmission etc.. We can assume that the fast growing micro-structuring technology will serve us soon with displays of higher resolutions and efficiency. Beam shaping elements, two-dimensional holograms and the reconstruction of digital holograms will be shown. The latter opens new possibilities for non-destructive testing devices especially in the field of holographic interferometry. We will show results of different systems and derive boundary conditions for applications in holographic reconstruction of coherent masks.

Paper Details

Date Published: 30 October 2001
PDF: 9 pages
Proc. SPIE 4596, Advanced Photonic Sensors and Applications II, (30 October 2001); doi: 10.1117/12.447341
Show Author Affiliations
Guenther K.G. Wernicke, Humboldt Univ. zu Berlin (Germany)
Sven Krueger, Humboldt Univ. zu Berlin (Germany)
Hartmut Gruber, Humboldt Univ. zu Berlin (Germany)
Nazif Demoli, Univ. of Zagreb (Croatia)
Matthias Duerr, HoloEye GmbH (Germany)
Stephan Teiwes, HoloEye GmbH (Switzerland)

Published in SPIE Proceedings Vol. 4596:
Advanced Photonic Sensors and Applications II
Anand Krishna Asundi; Wolfgang Osten; Vijay K. Varadan, Editor(s)

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