Abstract

An efficient method of resisting humidity for methylene-blue-sensitized dichromated gelatin (MBDCG) holograms is reported. The method uses a viscous liquid pure poly(styrene) solution with a low degree of polymerization as the coating material. On the basis of this coating, the diffraction efficiency of treated MBDCG holograms exposed to a high-humidity (relative humidity of 80–85%) environment was not obviously changed during observation over 3 mon.

© 1997 Optical Society of America

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References

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  1. R. Changkakoti and S. V. Pappu, “Methylene blue sensitized dichromated gelatin holograms: a study of their storage life and reprocessibility,” Appl. Opt. 28, 340–344 (1989).
    [CrossRef] [PubMed]
  2. G. M. Naik, A. Mathur, and S. V. Pappu, “Dichromated gelatin holograms: an investigation of their environment stability,” Appl. Opt. 29, 5292–5297 (1990).
    [CrossRef] [PubMed]
  3. L. R. Guo, C. M. Dai, and Y. K. Guo, “Anti-humidity dichromated gelatin holographic recording material,” in Computer and Optically Generated Holographic Optics, Vol. 4, I. Cindrich and S. H. Lee, eds., Proc. SPIE 1555, 293–296 (1991).
    [CrossRef]
  4. L. R. Guo, C. M. Dai, and T. Q. Cai, “Anti-humidity dichromated gelatin and its sensitized characteristics,” in Soviet-Chinese Joint Seminar on Holography and Optical Information Processing, A. L. Mikaelian, ed., Proc. SPIE 1731, 166–168 (1991).
    [CrossRef]
  5. Y. Nozaki and C. Tanford, “The solubility of amino acids and two glycine peptides in aqueous ethanol and dioxane solution,” J. Biol. Chem. 246, 2212–2217 (1971).
  6. M. Levitt, “A simplified representation of protein conformations for rapid simulation of protein folding,” J. Mol. Biol. 104, 59–107 (1976).
    [CrossRef] [PubMed]

1990

1989

1976

M. Levitt, “A simplified representation of protein conformations for rapid simulation of protein folding,” J. Mol. Biol. 104, 59–107 (1976).
[CrossRef] [PubMed]

1971

Y. Nozaki and C. Tanford, “The solubility of amino acids and two glycine peptides in aqueous ethanol and dioxane solution,” J. Biol. Chem. 246, 2212–2217 (1971).

Changkakoti, R.

Levitt, M.

M. Levitt, “A simplified representation of protein conformations for rapid simulation of protein folding,” J. Mol. Biol. 104, 59–107 (1976).
[CrossRef] [PubMed]

Mathur, A.

Naik, G. M.

Nozaki, Y.

Y. Nozaki and C. Tanford, “The solubility of amino acids and two glycine peptides in aqueous ethanol and dioxane solution,” J. Biol. Chem. 246, 2212–2217 (1971).

Pappu, S. V.

Tanford, C.

Y. Nozaki and C. Tanford, “The solubility of amino acids and two glycine peptides in aqueous ethanol and dioxane solution,” J. Biol. Chem. 246, 2212–2217 (1971).

Appl. Opt.

J. Biol. Chem.

Y. Nozaki and C. Tanford, “The solubility of amino acids and two glycine peptides in aqueous ethanol and dioxane solution,” J. Biol. Chem. 246, 2212–2217 (1971).

J. Mol. Biol.

M. Levitt, “A simplified representation of protein conformations for rapid simulation of protein folding,” J. Mol. Biol. 104, 59–107 (1976).
[CrossRef] [PubMed]

Other

L. R. Guo, C. M. Dai, and Y. K. Guo, “Anti-humidity dichromated gelatin holographic recording material,” in Computer and Optically Generated Holographic Optics, Vol. 4, I. Cindrich and S. H. Lee, eds., Proc. SPIE 1555, 293–296 (1991).
[CrossRef]

L. R. Guo, C. M. Dai, and T. Q. Cai, “Anti-humidity dichromated gelatin and its sensitized characteristics,” in Soviet-Chinese Joint Seminar on Holography and Optical Information Processing, A. L. Mikaelian, ed., Proc. SPIE 1731, 166–168 (1991).
[CrossRef]

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Figures (2)

Fig. 1
Fig. 1

Electron-microscope photographs of the surface structures of films coated with different polymers: (a) PMMA–xylene solution, (b) poly(styrene)–xylene solution, (c) PMMA with a low degree of polymerization prepared with an initiator, (d) poly(styrene) membrane prepared by self-thermopolymerization, which exhibits too high a degree of polymerization, and (e) poly(styrene) membrane prepared by self-thermopolymerization, which exhibits the correct degree of polymerization.

Fig. 2
Fig. 2

Real diffraction efficiency plotted versus the time of exposure to a high-humidity environment for MBDCG holograms with different coatings: Curve a is for a poly(styrene) membrane with the correct degree of polymerization that was prepared by self-thermopolymerization at RH = 80%. Curve b is for a poly(styrene) membrane with the correct degree of polymerization prepared by self-thermopolymerization after soaking in water at 30°C. Curve c is for a viscous liquid pure PMMA coating with a low degree of polymerization that was prepared with an initiator. Curve d is for the polymer–xylene solution of Naik et al.2 at RH = 80%. Curve e is for an uncoated holographic film.

Tables (1)

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Table 1 Procedure for Making MBDCG Holograms

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