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Proceedings Paper

MBG holograms under the optimum conditions
Author(s): Jian-ming Zhao; Min-qian Li; Jin-fang Pan; Junmin Wang; Meng-jia Sun
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Paper Abstract

A systematic investigation is carried out on the optimization of diffraction efficiency (DE) of only methylene blue sensitized gelatin (MBG) holograms. The influence of the following factors on DE are studied: the concentration of methylene blue (Cm), the concentration of ammonium dichromate solution (Ca), swelling temperature (Ts), exposure (E) and the relative humidity of air (RH). This study shows that under the condition of Cm-0.009%; Ca- 5%; Ts within 35 - 45 degree(s)C; E-150 mJ/cm2; RH within 45 - 65%, an optimum DE of over 80%, even 90% can be achieved in MBG holograms. In our experiments we find that a moderate DE(35%) is obtained without dichromate solution in post- processing. In order to know the role which the condition of bathing the plate in a dichromate solution plays and the photo-chemical mechanism of forming the interference pattern in the films, the X-ray spectra are made, the Cr3+ ligands are not found; this means that the quantity of Cr3+ ligands is too small to measure, even if its is existing in the processed film. These results can not be interpreted with the normal photo-chemical mechanism of forming the holograms.

Paper Details

Date Published: 31 December 1996
PDF: 5 pages
Proc. SPIE 2866, International Conference on Holography and Optical Information Processing (ICHOIP '96), (31 December 1996);
Show Author Affiliations
Jian-ming Zhao, Shanxi Univ. (China)
Min-qian Li, Shanxi Univ. (China)
Jin-fang Pan, Shanxi Normal Univ. (China)
Junmin Wang, Shanxi Univ. (China)
Meng-jia Sun, Shanxi Univ. (China)

Published in SPIE Proceedings Vol. 2866:
International Conference on Holography and Optical Information Processing (ICHOIP '96)
Guoguang Mu; Guofan Jin; Glenn T. Sincerbox, Editor(s)

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