Aberration-compensation Methods for 0.85 Numerical Aperture(NA) Single-Element Objective Lens

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Other Title
  • NA0.85単レンズによる球面収差自己補正型光ヘッド(画像記録装置および一般)
  • NA0.85単レンズによる球面収差自己補正型光ヘッド
  • NA0 85タンレンズ ニ ヨル キュウメン シュウサ ジコ ホセイガタ ヒカリ ヘッド

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Description

We have fabricated a high numerical aperture objective lens that consists of only a single-element. This lens has a large working distance and no assembling procedures in comparison to a two-element objective lens already proposed. We have also developed aberration compensation methods for coma and spherical aberration. Especially, spherical aberration is compensated automatically by using a servo circuit. A signal read-out obtained from a high-density optical disk is demonstrated using this single-element objective lens.

Journal

  • ITE Technical Report

    ITE Technical Report 26.1 (0), 43-47, 2002

    The Institute of Image Information and Television Engineers

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