Invention Grant
- Patent Title: Optical information recording medium and recording/reproducing device
- Patent Title (中): 光信息记录介质和记录/再现装置
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Application No.: US14651286Application Date: 2014-01-29
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Publication No.: US09472231B2Publication Date: 2016-10-18
- Inventor: Kenya Nakai , Masayuki Omaki
- Applicant: MITSUBISHI ELECTRIC CORPORATION
- Applicant Address: JP Tokyo
- Assignee: Mitsubishi Electric Corporation
- Current Assignee: Mitsubishi Electric Corporation
- Current Assignee Address: JP Tokyo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2013-019500 20130204
- International Application: PCT/JP2014/051894 WO 20140129
- International Announcement: WO2014/119588 WO 20140807
- Main IPC: G11B7/24065
- IPC: G11B7/24065 ; G11B7/24053 ; G11B7/1263 ; G11B7/00 ; G11B7/0045 ; G11B20/12 ; G11B7/0037

Abstract:
An optical information recording medium has: a recording layer; a super-resolution functional layer; and a protective layer. Letting n be the refractive index of the protective layer with respect to a laser beam focused by a focusing optical system, λ, be the wavelength of the laser beam, and ds be the depth of recording marks, when the super-resolution functional layer is irradiated by the focused laser beam, it forms a focused light spot including central light that irradiates the recording marks and peripheral light that irradiates a region outside the central light. The optical information recording medium further satisfies either the condition that the central light has a positive phase difference with respect to the peripheral light and ds>λ/4n, or the condition that the central light has a negative phase difference with respect to the peripheral light and ds
Public/Granted literature
- US20150332726A1 OPTICAL INFORMATION RECORDING MEDIUM AND RECORDING/REPRODUCING DEVICE Public/Granted day:2015-11-19
Information query
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