Invention Grant
- Patent Title: Optical information recording medium
- Patent Title (中): 光信息记录介质
-
Application No.: US13790907Application Date: 2013-03-08
-
Publication No.: US08530025B2Publication Date: 2013-09-10
- Inventor: Tatsuo Mikami , Hidehiro Mochizuki
- Applicant: FUJIFILM Corporation
- Applicant Address: JP Tokyo
- Assignee: FUJIFILM Corporation
- Current Assignee: FUJIFILM Corporation
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: JP2010-209489 20100917
- Main IPC: G11B7/24
- IPC: G11B7/24

Abstract:
An optical information recording medium comprises a plurality of recording layers, and intermediate layers provided between the plurality of recording layers. The optical information recording medium has a recess for use in tracking, in a layer which is provided in a position farther, than the plurality of recording layers, from a light-incident side on which a beam emitted for recording/reading enters. A depth D of the recess is λ/4n where λ is a wavelength of the beam emitted for recording/reading, n is a refractive index of a layer with which the recess is filled.
Public/Granted literature
- US20130189494A1 OPTICAL INFORMATION RECORDING MEDIUM Public/Granted day:2013-07-25
Information query
IPC分类: