Patent · US Active

Coupling lens and optical information recording/reproducing device having the same

US8004955B2 · kind B2 · utility

1Cited by

5References

5Claims

0Family size

Assignee

HOYA CORPORATION · JP

Inventors

Yoshiyuki Tashiro · Saitama, JP
Shuichi Takeuchi · Saitama, JP

Key dates

Filing date	Oct 15, 2008
Grant date	Aug 23, 2011
Priority date	—
Expiry date	Nov 14, 2029

Classification

Technology area (CPC G)Physics
CPC primaryG11B2007/0006
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

There is provided a coupling lens used in an optical information recording/reproducing device for recording information to and/or reproducing information from an optical disc. The coupling lens includes a first surface and a second surface, wherein the coupling lens is configured to satisfy a following condition (1):−0.80≦Z≦0.40 (1),

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.