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7 December 1992 Sol-gel optical coatings processed by the 'laminar flow coating' technique
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We describe a new coating method "Laminar Flow Coating"* (LFC) technique developed to obtain highly reflective (HR) laser damage resistant sol-gel multidielectric coatings. Such coatings are used in highpower lasers for inertial confinement fusion experiments (ICF). This technique uses substrates in an upsidedown position and a travelling wave of coating solution is laminary transported under the substrate surface with a tubular dispense unit. This creates a thin-film coating by the solvent evaporation. Satisfactory results have been obtained onto 20-cm square glass substrates regarding the optical performances, the tickness uniformity, the edge-effects and the laser damage resistance. This deposition technique combines the advantages of both classical techniques : the substrate non-exclusive geometry such as in dip-coating and the small solution consumption such as in spin-coating. The association of sol-gel colloidal suspensions and LFC coating process has been demonstrated as a promising way to produce cheap specific optical coatings1.
© (1992) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Philippe F. Belleville, Herve G. Floch, and Michel Berger "Sol-gel optical coatings processed by the 'laminar flow coating' technique", Proc. SPIE 1758, Sol-Gel Optics II, (7 December 1992);

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