Design approaches with a lenslet array and a single, high-numerical-aperture annular-field objective lens for optical data storage systems that incorporate large numbers of parallel read–write–erase channels

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8 Scopus citations

Abstract

To achieve very high data rates (>109 bitsys) in optical data storage systems it is necessary to employ a large number of laser beams for parallel read–write–erase operations. Bringing all these beams to diffraction-limited focus with a high-numerical-aperture objective lens (while maintaining focus and tracking) requires techniques that are fundamentally different from those that are currently practiced in the field of optical data storage. We present two possible solutions to the problem of designing an objective lens for such systems, one involving an array of high-quality lenslets and the other based on a single, high-numerical-aperture annular-field-of-view conventional lens. Both approaches have advantages and disadvantages, on which we elaborate in the course of our discussions.

Original languageEnglish (US)
Pages (from-to)1163-1168
Number of pages6
JournalApplied optics
Volume38
Issue number7
DOIs
StatePublished - Jan 1 1999

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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