Anti-Reflection Structures on Lenses by Nanoimprinting Using Ordered Anodic Porous Alumina

Abstract

Anti-reflection (AR) structures composed of an ordered array of tapered pillars were formed on the surfaces of two types of lens, microlens and Fresnel lens, through the nanoimprinting of polymer using molds prepared from anodic porous alumina. The use of anodic porous alumina for the preparation of mold for nanoimprinting allows the formation of AR structures on the curved surface of the lens, and could effectively suppress the reflectance of incident light. The process enables the high-throughput production of polymer lenses with AR structures and will be useful for the preparation of various types of functional optical devices.