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1. 发明授权

US5316900A Optical recording medium having a constant birefringent property and an alterable photochromic property 失效
标题翻译：具有恒定双折射性和可变光致变色特性的光记录介质
公开(公告)号：US5316900A
公开(公告)日：1994-05-31
申请号：US138246
申请日：1993-10-15
申请人： Tsuyoshi Tsujioka , Fumio Tatezono , Koutaro Matsuura , Masahiro Irie
发明人： Tsuyoshi Tsujioka , Fumio Tatezono , Koutaro Matsuura , Masahiro Irie
IPC分类号： G11B7/24 , G03C1/73
CPC分类号： G11B7/24 , Y10S430/146
摘要： A recording medium comprises a recording layer, a birefringent layer, and a reflecting layer. The recording layer is formed of a material whose optical rotatory power is alterable such that in one state no optical rotatory power is present and, in a second state, optical rotatory power is present. Information is recorded in the recording layer by selectively altering the state of the recording layer. The birefringent layer is formed of a material having constant birefringence without regard to the state of the recording layer. The reflecting layer reflects a light beam transmitted through the recording layer and the birefringent layer to reintroduce the beam into the birefringent layer and the recording layer. A method of reproducing information from this recording medium applies a polarized light beam to the recording medium and detects change of the polarized state of the polarized light beam reflected from the recording medium, thereby reading the information recorded in the recording layer. According to the inventive recording medium and reproducing method, the information is reproduced by detecting the presence of optical rotatory power of the recording layer.
摘要翻译：记录介质包括记录层，双折射层和反射层。记录层由其旋光力可变的材料形成，使得在一个状态下不存在旋转光，而在第二状态下存在旋转光。通过选择性地改变记录层的状态将信息记录在记录层中。双折射层由具有恒定双折射的材料形成，而不考虑记录层的状态。反射层反射透射通过记录层和双折射层的光束，以将光束重新引入双折射层和记录层。从该记录介质再现信息的方法将偏振光束施加到记录介质上并检测从记录介质反射的偏振光束的偏振状态的变化，从而读取记录在记录层中的信息。根据本发明的记录介质和再现方法，通过检测记录层的旋转光的存在来再现信息。

2. 发明授权

US5281501A Method of recording and reproducing for optical recording medium 失效
标题翻译：光记录介质的记录和再现方法
公开(公告)号：US5281501A
公开(公告)日：1994-01-25
申请号：US801247
申请日：1991-12-03
申请人： Fumio Tatezono , Irie Masahiro , Toshio Tanuma , Toshio Harada , Koutaro Matsuura
发明人： Fumio Tatezono , Irie Masahiro , Toshio Tanuma , Toshio Harada , Koutaro Matsuura
IPC分类号： C09K9/02 , G11B7/0045 , G11B7/244 , G11B7/245 , G11B7/249 , G11B7/253 , G11B7/2531 , G11B7/258 , G11B7/2585 , G11B7/00
CPC分类号： G11B7/245 , C09K9/02 , G11B7/00455 , G11B7/244 , G11B7/2531 , G11B7/2585 , Y10S430/146 , Y10S430/163
摘要： Disclosed herein is a recording/reproducing method for an optical recording medium comprising a step of heating a recording layer containing a photochromic material and a polymer which are so combined with each other that a photostationary state attained upon irradiation with light of a specific wavelength is varied with temperatures, and a step of applying the light of a specific wavelength to the heated recording layer for bringing the same into a photostationary state and recording information. In order to reproduce the information, a portion of the recording layer which is in a photostationary state is selectively heated, and reproducing light is applied to reproduce recorded and unrecorded states.
摘要翻译：本文公开了一种用于光学记录介质的记录/再现方法，其包括将包含光致变色材料和聚合物的记录层彼此组合的步骤，使得在特定波长的光照射下获得的光静电状态发生变化以及将特定波长的光施加到加热的记录层以使其成为静止状态并记录信息的步骤。为了再现信息，选择性地加热处于静止状态的记录层的一部分，并且再现光以再现记录和未记录的状态。

3. 发明授权

US5173370A Magnetic recording medium having a magnetic thin film with both paramagnetic phase and ferromagnetic phase iron nitride with paramagnetic phase zeta Fe.sub.2 N as its largest component 失效
标题翻译：磁性记录介质具有两个具有参考相位ZETA FE2N作为其最大组件的参考相位和非相容性硝酸铁的磁性薄膜
公开(公告)号：US5173370A
公开(公告)日：1992-12-22
申请号：US564256
申请日：1990-08-08
申请人： Seiichiro Takahashi , Minoru Kume , Koutaro Matsuura
发明人： Seiichiro Takahashi , Minoru Kume , Koutaro Matsuura
IPC分类号： G11B5/64 , G11B5/851
CPC分类号： G11B5/653 , G11B5/656 , G11B5/851 , Y10S428/90
摘要： A perpendicular magnetic recording medium comprises a non-magnetic substrate having one main surface and a magnetic film of Fe-N or Fe-Co-N formed on the substrate's main surface. The magnetic film includes not only ferromagnetic phase, but also .zeta.-Fe.sub.2 N of paramagnetic phase. The magnetic film is characterized by having columnar crystal structure extending in a direction perpendicular to the substrate's main surface and perpendicular magnetic anisotropy by including .zeta.- Fe.sub.2 N.

4. 发明授权

US5376511A Optical recording medium 失效
标题翻译：光记录媒体
公开(公告)号：US5376511A
公开(公告)日：1994-12-27
申请号：US169547
申请日：1993-12-20
申请人： Fumio Tatezono , Masahiro Irie , Toshio Harada , Koutaro Matsuura
发明人： Fumio Tatezono , Masahiro Irie , Toshio Harada , Koutaro Matsuura
IPC分类号： C09K9/02 , G11B7/0045 , G11B7/244 , G11B7/245 , G11B7/249 , G11B7/24
CPC分类号： C09K9/02 , G11B7/00455 , G11B7/244 , G11B7/245 , G11B7/249 , G11B7/2585 , Y10S430/146 , Y10S430/163
摘要： Disclosed herein is an optical recording medium comprising a recording layer containing a photochromic material and a polymer which are so combined with each other that a photostationary state attained upon irradiation with light of a specific wavelength is varied with temperatures, a reflective layer for reflecting light which is passed through the recording layer, and a substrate for supporting a laminate of the recording layer and the reflective layer.
摘要翻译：本文公开了一种光记录介质，其包含含有光致变色材料和聚合物的记录层，所述记录层彼此组合，使得在用特定波长的光照射时获得的光静电状态随温度而变化，用于反射光的反射层通过记录层，以及用于支撑记录层和反射层的叠层的基板。

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