Optical pick-up for blue optical recording at NA=0.85

摘要

Sony and Philips have recently developed the basic technology for a 22.5 GB optical recording system, based on a blue laser (lambda = 405 nm) and high numerical aperture (NA = 0.85) objective lens. This system is referred to by the acronym DVR (for Digital Video Recording). In this paper we describe the relization of a compact optical pickup unit capable of writing and reading data on disc according to the DVR format. [References: 5]