Invention Grant
- Patent Title: Optical pickup apparatus
- Patent Title (中): 光拾取装置
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Application No.: US11728811Application Date: 2007-03-27
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Publication No.: US07710848B2Publication Date: 2010-05-04
- Inventor: Kiyono Ikenaka
- Applicant: Kiyono Ikenaka
- Applicant Address: JP Tokyo
- Assignee: Konica Minolta Opto, Inc.
- Current Assignee: Konica Minolta Opto, Inc.
- Current Assignee Address: JP Tokyo
- Agency: Cohen Pontani Lieberman & Pavane LLP
- Priority: JP2006-092858 20060330
- Main IPC: G11B7/00
- IPC: G11B7/00
Abstract:
The present invention provides an optical pickup apparatus including: a first light source; a second light source; and a light-converging optical system including a coupling lens and an objective lens. The coupling lens includes a first diffractive structure. The optical pickup apparatus satisfies a predetermined condition according to the chromatic aberration, focal length, and dispersion of the material.
Public/Granted literature
- US20070230312A1 Optical pickup apparatus Public/Granted day:2007-10-04
Information query
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