Antireflection coating design for plastic optics.
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.
Schulz
Ulrike
U
Fraunhofer Institute for Applied Optics and Precision Engineering, Jena, Germany. ulrike.schulz@iof.fhg.de
Schallenberg
Uwe B
UB
Kaiser
Norbert
N