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Proceedings Paper

Phase holograms in silver halide emulsions without a bleaching step
Author(s): Augusto Belendez; Roque F. Madrigal; Inmaculada V. Pascual; Antonio Fimia
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Paper Abstract

Phase holograms in holographic emulsions are usually obtained by two bath processes (developing and bleaching). In this work we present a one step method to reach phase holograms with silver-halide emulsions. Which is based on the variation of the conditions of the typical developing processes of amplitude holograms. For this, we have used the well-known chemical developer, AAC, which is composed by ascorbic acid as a developing agent and sodium carbonate anhydrous as accelerator. Agfa 8E75 HD and BB-640 plates were used to obtain these phase gratings, whose colors are between yellow and brown. In function of the parameters of this developing method the resulting diffraction efficiency and optical density of the diffraction gratings were studied. One of these parameters studied is the influence of the grain size. In the case of Agfa plates diffraction efficiency around 18% with density < 1 has been reached, whilst with the BB-640 emulsion, whose grain is smaller than that of the Agfa, diffraction efficiency near 30% has been obtained. The resulting gratings were analyzed through X-ray spectroscopy showing the differences of the structure of the developed silver when amplitude and transmission gratings are obtained. The angular response of both (transmission and amplitude) gratings were studied, where minimal transmission is showed at the Braggs angle in phase holograms, whilst a maximal value is obtained in amplitude gratings.

Paper Details

Date Published: 17 March 2000
PDF: 7 pages
Proc. SPIE 3956, Practical Holography XIV and Holographic Materials VI, (17 March 2000); doi: 10.1117/12.380018
Show Author Affiliations
Augusto Belendez, Univ. de Alicante (Spain)
Roque F. Madrigal, Univ. Miguel Hernandez de Elche (Spain)
Inmaculada V. Pascual, Univ. de Alicante (Spain)
Antonio Fimia, Univ. Miguel Hernandez de Elche (Spain)


Published in SPIE Proceedings Vol. 3956:
Practical Holography XIV and Holographic Materials VI
Sylvia H. Stevenson; T. John Trout; Stephen A. Benton; Sylvia H. Stevenson; T. John Trout, Editor(s)

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