Space-variant image processing with volume holography

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Title: Space-variant image processing with volume holography
Authors: Márquez, Andrés | Neipp, Cristian | Gallego, Sergi | Ortuño, Manuel | Beléndez, Augusto | Pascual, Inmaculada
Research Group/s: Holografía y Procesado Óptico
Center, Department or Service: Universidad de Alicante. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal | Universidad de Alicante. Departamento de Óptica, Farmacología y Anatomía
Keywords: Holography | Holographic optical elements | Holographic recording materials | Photopolymers | Image processing
Knowledge Area: Óptica | Física Aplicada
Date Created: 2004
Issue Date: 1-Sep-2004
Publisher: SPIE, The International Society for Optical Engineering
Citation: MÁRQUEZ RUIZ, Andrés, et al. "Space-variant image processing with volume holography". En: Photon management : 27-28 April 2004, Strasbourg, France / Frank Wyrowski, chair-editor. Bellingham, Wash. : SPIE, 2004. (Proceedings of SPIE; Vol. 5456). ISBN 978-0-81945-383-9, pp. 315-326
Abstract: In this work we explore the application of volume effects given by holographic optical elements (HOEs) to image processing operations. Bragg diffraction, exhibited by HOEs, modifies the impulse response of an imaging system, facilitating spatial filtering operations with no need for a physical Fourier plane. Both the holographic recording material we use and the specific HOE we design are important parameters. In the present communication we report our last results using a polyvinyl alcohol/acrylamide (PVA/AA) photopolymer. This compound combines good optical properties, ease of fabrication, and self-development capability. We are able to produce layers as thick as 1 millimeter (mm) with a diffraction efficiency higher than 80%. Using layers with a thickness of 0.1 mm and 1 mm we have recorded both holographic diffraction gratings and holographic lenses. When using the holographic gratings we can obtain image edge enhancement as demonstrated in previous works. As a novelty, in this work we show that when using the holographic lenses we obtain a space-variant image edge enhancement. We analyse the properties of this space-variant operation in terms of the reconstruction geometry and the local grating structure exhibited by the lens across its aperture.
Sponsor: This work was supported by the "Ministerio de Ciencia y Tecnología", CICYT, Spain (project MAT2000-1361-C04-04) and by "Generalitat Valenciana", Spain (project GV01-130).
ISBN: 978-0-81945-383-9
ISSN: 0277-786X
DOI: 10.1117/12.545451
Language: eng
Type: info:eu-repo/semantics/article
Rights: Copyright 2004 Society of Photo-Optical Instrumentation Engineers. This paper was published in Proceedings of SPIE, vol. 5456, and is made available as an electronic reprint with permission of SPIE. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Peer Review: si
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