Patent ID: 6765732
Filing Date: 2004-07-20
Classification: B29C,B29D,B29L,C03B,G02B,G11B,Y02P

Abstract:
An objective lens for use in an optical pickup apparatus for conducting recording and/or reproducing information for an optical information recording medium, comprising:a lens section shaped in an approximate circle and including a flange section; and a first projecting section integrally provided to the lens section; wherein the following conditional formulas are satisfied: 0.5&lE;A&lE;2.0 0.3&lE;A&lE;1.7A where A is a diameter (mm) of the lens section when the lens section is viewed from an direction of an optical axis, and B is a width (mm) of the first projecting section when the first projecting section is viewed from the direction of the optical axis.