发明授权
- 专利标题: Optical information recording medium
- 专利标题(中): 光信息记录介质
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申请号: US11410853申请日: 2006-04-26
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公开(公告)号: US07251212B2公开(公告)日: 2007-07-31
- 发明人: Yuki Nakamura , Tohru Yashiro , Tatsuo Mikami
- 申请人: Yuki Nakamura , Tohru Yashiro , Tatsuo Mikami
- 申请人地址: JP Tokyo
- 专利权人: Ricoh Company, Ltd.
- 当前专利权人: Ricoh Company, Ltd.
- 当前专利权人地址: JP Tokyo
- 代理机构: Dickstein Shapiro LLP
- 优先权: JP2004-081173 20040319; JP2004-343159 20041126
- 主分类号: G11B7/24
- IPC分类号: G11B7/24 ; B32B3/02
摘要:
An optical information recording medium containing a first information substrate including a first substrate having a guide groove thereon, a first recording layer including a dye, overlying the first substrate and a first reflective layer being a semi-transmittance layer, overlying the first recording layer, a second information substrate comprising, a second substrate having a guide groove thereon, a second recording layer comprising a dye, overlying the second substrate, a second reflective layer being a semi-transmittance layer, located overlying the second recording layer and a light transmittance protective layer overlying the second reflective layer and a transparent intermediate layer. Further, the following relationships (1) and (2) are satisfied: (1) 0.3≦nd/λ≦0.7, wherein n represents refractive index in the complex refractive index n-ik of the light transmittance protective layer, d represents a thickness thereof, and λ is at least one of a recording wavelength and a playback wavelength, (2) k≦0.05, wherein k represents absorption index of the light transmittance protective layer of the complex refractive index n-ik.
公开/授权文献
- US20060204704A1 Optical information recording medium 公开/授权日:2006-09-14