MBG holograms under the optimum conditions

Jian-ming Zhao; Min-qian Li; Jin-fang Pan; Junmin Wang; Meng-jia Sun

doi:10.1117/12.263070

31 December 1996 MBG holograms under the optimum conditions

Jian-ming Zhao, Min-qian Li, Jin-fang Pan, Junmin Wang, Meng-jia Sun

Proceedings Volume 2866, International Conference on Holography and Optical Information Processing (ICHOIP '96); (1996) https://doi.org/10.1117/12.263070
Event: International Conference on Holography and Optical Information Processing, 1996, Nanjing, China

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.

Citation Download Citation

Jian-ming Zhao, Min-qian Li, Jin-fang Pan, Junmin Wang, and Meng-jia Sun "MBG holograms under the optimum conditions", Proc. SPIE 2866, International Conference on Holography and Optical Information Processing (ICHOIP '96), (31 December 1996); https://doi.org/10.1117/12.263070

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