Polymer Based Thin Film Screen Preparation Technique

Phosphor screens, mainly prepared by electrophoresis, demonstrate brightness equal to the standard sedimentation on glass or quartz substrate process and are capable of very high resolution. Nevertheless, they are very fragile, the shape of the screen is limited to the substrate shape and in order t...

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Bibliographic Details
Published in:Journal of physics. Conference series 2017-11, Vol.931 (1), p.12035
Main Authors: Valais, I., Michail, C., Fountzoula, C., Fountos, G., Saatsakis, G., Karabotsos, A., Panayiotakis, G.S., Kandarakis, I.
Format: Article
Language:English
Subjects:
Electrophoresis
film screens
Fluorescence
Glass substrates
Medical imaging
Optical fibers
Packing density
Phosphors
Physics
PMMA
Polymer films
Polymers
Polymethyl methacrylate
Screens
Thin films
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Summary:Phosphor screens, mainly prepared by electrophoresis, demonstrate brightness equal to the standard sedimentation on glass or quartz substrate process and are capable of very high resolution. Nevertheless, they are very fragile, the shape of the screen is limited to the substrate shape and in order to achieve adequate surface density for application in medical imaging, a significant quantity of the phosphor will be lost. Fluorescent films prepared by the dispersion of phosphor particles into a polymer matrix could solve the above disadvantages. The aim of this study is to enhance the stability of phosphor screens via the incorporation of phosphor particles into a PMMA (PolyMethyl MethAcrylate) matrix. PMMA is widely used as a plastic optical fiber, it shows almost nearly no dispersion effects and it is transparent in the whole visible spectral range. Different concentrations of PMMA in MMA (Methyl Methacrylate) were examined and a 37.5 % w/w solution was used for the preparation of the thin polymer film, since optical quality characteristics were found to depend on PMMA in MMA concentration. Scanning Electron Microscopy (SEM) images of the polymer screens demonstrated high packing density and uniform distribution of the phosphor particles. This method could be potentially used for phosphor screen preparation of any size and shape.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/931/1/012035