Invention Grant
- Patent Title: Objective lens, optical head device, optical information device, and optical disk system
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Application No.: US16963575Application Date: 2019-10-23
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Publication No.: US11475917B2Publication Date: 2022-10-18
- Inventor: Yoshiaki Komma , Yasushi Kobayashi , Kazuhiro Minami
- Applicant: Panasonic Intellectual Property Management Co., Ltd.
- Applicant Address: JP Osaka
- Assignee: Panasonic Intellectual Property Management Co., Ltd.
- Current Assignee: Panasonic Intellectual Property Management Co., Ltd.
- Current Assignee Address: JP Osaka
- Agency: Wenderoth, Lind & Ponack, L.L.P.
- Priority: JPJP2018-224311 20181130
- International Application: PCT/JP2019/041587 WO 20191023
- International Announcement: WO2020/110525 WO 20200604
- Main IPC: G11B7/139
- IPC: G11B7/139 ; G11B7/1374 ; G02B13/18 ; G11B7/0045
Abstract:
Provided is an objective lens which is used so that more information can be accumulated in a large-capacity optical disk and which has a further enhanced numerical aperture NA. The objective lens is a single lens having the numerical aperture NA and a refractive index n, and is configured so as to satisfy: NA≥0.91 and 1.61≤n
Public/Granted literature
- US11430479B2 Objective lens, optical head device, optical information device, and optical disk system Public/Granted day:2022-08-30
Information query
IPC分类:
