公开(公告)号：US5080946A

公开(公告)日：1992-01-14

申请号：US549114

申请日：1990-07-06

申请人： Yosikazu Takagisi ,  Kunihiko Ootaguro ,  Emiko Hamada ,  Toru Fujii

发明人： Yosikazu Takagisi ,  Kunihiko Ootaguro ,  Emiko Hamada ,  Toru Fujii

IPC分类号： G03G5/04 ,  G11B7/24

CPC分类号： G11B7/24 ,  Y10S428/913 ,  Y10S430/146 ,  Y10T428/24876 ,  Y10T428/24893

摘要： An optical information recording medium comprising a light transmitting substrate having a spiral pregroove formed on its surface, a light absorptive layer of a coloring matter formed on the substrate directly or with other layer interposed therebetween, and a light reflective layer made of a metal film formed on the light absorptive layer directly or with other layer interposed therebetween, wherein .DELTA.S.ltoreq.0.3 wherein .DELTA.S is the optical phase difference represented by .DELTA.S=2d.sub.sub {n.sub.sub -n.sub.abs (1-d.sub.abs /d.sub.sub)}/.lambda. wherein d.sub.sub is the depth of the layer boundary on the substrate side of the light absorptive layer at the portion corresponding to the pregroove, d.sub.abs is the depth of the layer boundary on the light absorptive layer side of the light reflective layer at the portion corresponding to the pregroove, n.sub.sub is the real part of the complex refractive index of the substrate and any layer present on the substrate side of the light absorptive layer, n.sub.abs is the real part of the complex refractive index of the light absorptive layer, and .lambda. is the wavelength of a laser beam.

公开(公告)号：US5318882A

公开(公告)日：1994-06-07

申请号：US686870

申请日：1991-04-16

申请人： Kunihiko Ootaguro ,  Emiko Hamada ,  Yosikazu Takagisi ,  Toru Fujii

发明人： Kunihiko Ootaguro ,  Emiko Hamada ,  Yosikazu Takagisi ,  Toru Fujii

IPC分类号： C08K5/32 ,  G11B7/244 ,  G11B7/24

CPC分类号： C08K5/32 ,  G11B7/244 ,  G11B7/2472 ,  G11B7/2475 ,  G11B7/2534 ,  Y10S430/146

摘要： Certain types of aryl nitrogen compounds are found to be useful not only for effectively rendering dyes lightfast but also for using as an additive that has high solubility in solvents and sufficiently good miscibility with dyes to insure that their solubility will not be impaired. They can be used for preventing various reactions that cause deterioration by light in organic dyes, in particular cyanine dyes. They can also be used for improving the keeping quality and recording and reproduction characteristics of optical recording media that use organic dyes in the form of thin films. Representative examples include N, N-lower alkyl substituted nitrosoanilines, phenol or naphthol derivatives having at least one nitroso group, nitrosodiphenylamine and its derivatives and 1-pycryl-2, 2-diarylhydrazyl free radicals.

摘要翻译： 发现某些类型的芳基氮化合物不仅用于有效地使染料耐光，而且用作在溶剂中具有高溶解性和与染料充分良好混溶性的添加剂，以确保其溶解性不会受损。 它们可用于防止在有机染料，特别是花青染料中引起光的劣化的各种反应。 它们也可用于提高以薄膜形式使用有机染料的光学记录介质的保存质量和记录和再现特性。 代表性实例包括N，N-低级烷基取代的亚硝基苯胺，具有至少一个亚硝基的苯酚或萘酚衍生物，亚硝基二苯胺及其衍生物和1-对环基-2,2-二芳基肼基自由基。