Optical: systems and elements – Lens – With support
Reexamination Certificate
2005-05-17
2005-05-17
Spector, David N. (Department: 2873)
Optical: systems and elements
Lens
With support
C264S001320
Reexamination Certificate
active
06894849
ABSTRACT:
An objective lens for use in an optical pickup apparatus for conducting recording and/or reproducing information for an optical information recording medium, has a lens section shaped in an approximate circle and including a flange section; and a connecting section integrally provided to the lens section. The objective lens satisfies the following conditional formulas:in-line-formulae description="In-line Formulae" end="lead"?0.5≦A≦2.0, 0.3A≦B≦1.7Ain-line-formulae description="In-line Formulae" end="tail"?where A is a diameter of the lens section when the lens section is viewed from an direction of an optical axis, and B is a width of the connecting section when the connecting section is viewed from the direction of the optical axis.
REFERENCES:
patent: 6055111 (2000-04-01), Nomura et al.
patent: 6078430 (2000-06-01), Fukuda et al.
patent: 6144500 (2000-11-01), Iwaki et al.
patent: 6144505 (2000-11-01), Nakanishi et al.
patent: 20030026007 (2003-02-01), Yamamoto et al.
Arai Norikazu
Atarashi Yuichi
Hattori Hiroyuki
Ishida Kazuo
Kurihara Etsuzo
Konica Corporation
Spector David N.
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