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Proceedings Paper

Fabrication of computer-generated phase holograms using photopolymers as holographic recording material
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Paper Abstract

Photopolymers are studied as holographic recording material for computer-generated phase filters for pattern recognition by optical correlation. The analysis was performed using a copying process with a computer-generated filter, which is produced by means of a high resolution graphic device, as a master. In this work the low spatial frequency response of the photopolymer as holographic material is studied. The copying process used in this work consists of storing the pattern contained in the master in a photopolymer used as a holographic recording material. This photopolymer does not work in real-time, it is possible to store the holographic optical element for a long time because the dye is finished during exposition and the chemical process is not necessary after exposition. We used partially coherent light, from a high pressure mercury lamp. The photopolymer used in these experiments was composed of acrylamide and triethanolamine as the coinitiator, photoinitiated with a dye, yellow eoxine. Components were supported by a film of poly(vinylalcohol). The resulting thickness of the film was approximately 70 micrometers . Diffraction gratings and Fresnel lenses were obtained as phase holograms by index and thickness modulation, monitored with an electron microscope. First order diffraction efficiency achieved was 30%.

Paper Details

Date Published: 1 June 1999
PDF: 4 pages
Proc. SPIE 3633, Diffractive and Holographic Technologies, Systems, and Spatial Light Modulators VI, (1 June 1999); doi: 10.1117/12.349321
Show Author Affiliations
Inmaculada V. Pascual, Univ. de Alicante (Spain)
Andres Marquez, Univ. Autonoma de Barcelona (Spain)
Augusto Belendez, Univ. de Alicante (Spain)
Antonio Fimia, Univ. Miguel Hernandez de Elche (Spain)
Juan Campos, Univ. Autonoma de Barcelona (Spain)
Maria Josefa Yzuel, Univ. Autonoma de Barcelona (Spain)

Published in SPIE Proceedings Vol. 3633:
Diffractive and Holographic Technologies, Systems, and Spatial Light Modulators VI
Ivan Cindrich; Sing H. Lee; Richard L. Sutherland, Editor(s)

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