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Proceedings Paper

Application of argon laser beam diffraction for determination of the properties of photoinduced processes in dyed PVA foils
Author(s): Alfons Planner; Tomasz Runka; A. Skrzypczak; M. Hara; J. Miyake
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Paper Abstract

It is shown that far field patterns of argon laser beam interacting with dyed foil of polyvinyl alcohol (PVA) provide information on the mechanism of local foil discoloration or at least on a few properties of this process. In particular far field patterns observations allow discernment if the process is reversible (or a superposition of reversible and irreversible processes), photothermal, photochemical or produce a stretching in sample (photoizomerisation). The effect was studied in PVA foil containing methyl red, photosynthetic bacteria, their fragments and pigments. Apart from indicating the possibility of using the far field patterns for discernment of the foil discoloration mechanisms, the results reported point to the perspectives of using the foil for laser beam modification, shift or modulation, as well as elements of optical memory.

Paper Details

Date Published: 2 November 2000
PDF: 5 pages
Proc. SPIE 4238, Laser Technology VI: Applications, (2 November 2000); doi: 10.1117/12.405987
Show Author Affiliations
Alfons Planner, Poznan Univ. of Technology and National Institute for Advanced Interdisciplinary Research (Poland)
Tomasz Runka, Poznan Univ. of Technology (Poland)
A. Skrzypczak, Poznan Univ. of Technology (Poland)
M. Hara, National Institute for Advanced Interdisciplinary Research (Japan)
J. Miyake, National Institute for Advanced Interdisciplinary Research (Japan)

Published in SPIE Proceedings Vol. 4238:
Laser Technology VI: Applications
Wieslaw L. Wolinski; Zdzislaw Jankiewicz, Editor(s)

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