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Antireflection coating design for plastic optics

: Schulz, U.; Schallenberg, U.B.; Kaiser, N.


Applied optics 41 (2002), No.16, pp.3107-3110
ISSN: 0003-6935
ISSN: 1539-4522
ISSN: 1559-128X
Journal Article
Fraunhofer IOF ()
antireflection coating design; plastic optics; optical application; mechanical durability; soft polymer; antireflection function; classic four-layer antireflection system; single-layer hard coating; needle optimization; coating design; high-refractive-index layer; Plasma-Ion Assisted Deposition; polymethyl methacrylate; polycarbonate; cyclo-olefin copolymer; uniform antireflection; high scratch resistance

The coating of plastics for optical applications is intended to improve the mechanical durability of soft polymers and to serve an antireflection function. Usually a classic four-layer antireflection system is added on top of a single-layer hard coating. With needle optimization, an alternative coating design has been developed. The design is characterized by thin high-refractive-index layers that are almost evenly distributed over the whole stack. Plasma ion-assisted deposition was used to deposit coatings upon poly(methyl methacrylate), polycarbonate, and cyclo-olefin copolymer. Uniform antireflection and high scratch resistance have been achieved.