Invention Grant
- Patent Title: Objective lens, optical pickup device, and optical recording/reproducing apparatus
- Patent Title (中): 物镜，光学拾取装置和光学记录/再现装置
-
Application No.: US12466545Application Date: 2009-05-15
-
Publication No.: US07995290B2Publication Date: 2011-08-09
- Inventor: Toshiaki Katsuma , Masao Mori , Tetsuya Ori , Yu Kitahara
- Applicant: Toshiaki Katsuma , Masao Mori , Tetsuya Ori , Yu Kitahara
- Applicant Address: JP Saitama-shi
- Assignee: Fujinon Corporation
- Current Assignee: Fujinon Corporation
- Current Assignee Address: JP Saitama-shi
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JPP2008-129205 20080516
- Main IPC: G02B3/02
- IPC: G02B3/02 ; G11B7/00
Abstract:
An objective lens for converging light emitted from a light source on an optical recording medium to record and reproduce information consists of a single lens having at least one aspheric surface. The following conditional expressions (1) to (3) are satisfied: N≦1.75 (1) 0.5
Public/Granted literature
- US20090285079A1 OBJECTIVE LENS, OPTICAL PICKUP DEVICE, AND OPTICAL RECORDING/REPRODUCING APPARATUS Public/Granted day:2009-11-19
Information query
IPC分类:
| G | 物理 |
| G02 | 光学 |
| G02B | 光学元件、系统或仪器 |
| G02B3/00 | 简单或复合透镜 |
| G02B3/02 | .具有非球面的（G02B3/10优先） |
