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Application of a liquid crystal display spatial light modulator system as dynamic diffractive element and in optical image processing (CROSBI ID 111994)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Wernicke, Gunther ; Kruger, Sven ; Kamps, Jorn ; Gruber, Hartmut ; Demoli, Nazif ; Durr, Matthias ; Teiwes, Stephan Application of a liquid crystal display spatial light modulator system as dynamic diffractive element and in optical image processing // Journal of optical communications, 25 (2004), 4; 141-148-x

Podaci o odgovornosti

Wernicke, Gunther ; Kruger, Sven ; Kamps, Jorn ; Gruber, Hartmut ; Demoli, Nazif ; Durr, Matthias ; Teiwes, Stephan

engleski

Application of a liquid crystal display spatial light modulator system as dynamic diffractive element and in optical image processing

The importance of spatial light modulators (SLMs) in optical systems is increasing. This paper presents our work on an SLM system based on Sony LCD. We show the optimisation of the LCD modulation behavior concerning the application as dynamical diffractive element, and the implementation of images and filter functions in optical correlators and pattern projection systems. Measurements of the coupled amplitude and phase modulation and the planarity of the display at different wavelengths lead to correction functions and several optimised operation modes, e.g. grey scale or binary amplitude modulation. The optimisation in the amplitude mode leads either to high contrast images of reduced grey levels or to a mostly linearized full grey scale mode. A similar way leads to optimised modes for the phase modulation and to a realisation of a total phase shift of 2π . The increase of the processing performance of phase-only filters in optical correlators is presented. Furthermore, diffraction efficiency (DE) measurements of Fourier holograms addressed to the SLM prove the optimisation process, compared to the non-optimised and the theoretical DE-values. So, estimations can be made concerning the application of the SLM as dynamical diffractive element.

optical image processing; spatial light modulator; liquid crystal display

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Podaci o izdanju

25 (4)

2004.

141-148-x

objavljeno

0173-4911

Povezanost rada

Fizika

Indeksiranost