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2. 发明专利

JPS61131257A Photomagnetic recording medium 失效
标题翻译：光电记录介质
公开(公告)号：JPS61131257A
公开(公告)日：1986-06-18
申请号：JP25260684
申请日：1984-11-29
申请人： Canon Inc
发明人： OSATO YOICHI , SAITO ICHIRO , ARAO KOZO , FUJII HIDEKAZU , TAKASU YOSHIO
IPC分类号： G11B11/10 , G02F1/09 , G11B11/105 , G11C13/06
CPC分类号： G11B11/10586 , G02F1/09
摘要： PURPOSE:To improve recording and reproducing characteristics and the shelf stability by providing a reflective layer obtained by mixing a substance having low absorption to light of specified wave length and a substance having high reflectance to the light in the specified ratio. CONSTITUTION:A reflective layer 13 is formed with a mixture of a substance having low absorption to the wavelength of reproduced light and a substance having high reflectance to the wavelength. The content of the substance having low absorption is preferably regulated to the range 0.80-0.95. The reflective layer fills simultaneously the reflecting function and the phase modulating function. Accordingly, reproduced light transmitted through a magnetic recording layer 12 and undergoing Faraday rotation is reflected by the reflective layer 13, transmitted through the magnetic recording layer 12 while undergoing Faraday rotation, and detected as a signal having high S/N due to an increase in the polarization angle. Since linearly polarized incident reproduced light is reflected by the reflective layer 13 as circularly polarized light, still higher S/N can be obtained by aligning the light optimally with an analyzer by utilizing a phase plate. Moreover, the reflective layer 13 is hardly oxidized, and the recording and reproducing characteristics and the sheef stability can be improved.
摘要翻译：目的：通过提供通过将具有低吸收性的物质与特定波长的光混合而获得的反射层和具有高反射率的物质以特定比例对光进行改善，从而提高记录和再现特性以及搁板稳定性。构成：反射层13由具有低吸收性的物质与再现光的波长和对波长具有高反射率的物质的混合物形成。吸收性低的物质的含量优选为0.80-0.95。反射层同时填充反射功能和相位调制功能。因此，通过磁记录层12透射并经历法拉第旋转的再生光被反射层13反射，反射层13在经历法拉第旋转时透过磁记录层12，并且由于增加而被检测为具有高S / N的信号偏振角。由于线偏振入射的再现光被反射层13作为圆偏振光反射，所以通过利用相位板将光最优化地与分析器对准，可以获得更高的S / N。此外，反射层13几乎不被氧化，并且可以提高记录和再现特性以及Sheef稳定性。

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