Optical element, probe and method for calibrating spherical aberration and optical recording/recproducing device

Optical element, probe and method for calibrating spherical aberration and optical recording/recproducing device

  • CN 1,472,564 A
  • Filed: 07/04/2003
  • Published: 02/04/2004
  • Est. Priority Date: 07/04/2002
  • Status: Active Application
First Claim
Patent Images

1. , a kind of optical element comprises:

  • Central shaft;

    First surface is in the extension in a lateral direction with respect to described central shaft;

    Second curved surface is in the extension in a lateral direction with respect to described central shaft;

    Circumferential surface is extended between described first surface and described second curved surface;

    It is characterized in that light was refracted to it from time that described second curved surface penetrates from its time that is incident on described first surface, thereby the light intensity distributions of the light that penetrates from described second curved surface is different with the light intensity distributions of the light that is incident on described first surface, andEdge strength improvement rate R, promptly the edge strength of the light of She Chuing is with respect to the ratio of the edge strength of the light of incident, and more than or equal to 1.07 and smaller or equal to 1.5, wherein edge strength is represented the center intensity and the ratio of intensity on every side.

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