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1.发明授权
公开(公告)号：US5381391A
公开(公告)日：1995-01-10
申请号：US125294
申请日：1993-09-22
申请人： Takuma Yanagisawa , Seiichi Ohsawa
发明人： Takuma Yanagisawa , Seiichi Ohsawa
摘要： An optical disk having two transparent and a refelection film. The reflection film is made of a non-linear optical material in which reflectance increases according to intensity of incident light thereto. The reflection film has a multiple reflectance.
摘要翻译： 具有两个透明和反射膜的光盘。 反射膜由反射率随入射光的强度而增加的非线性光学材料制成。 反射膜具有多重反射率。
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公开(公告)号：US5455817A
公开(公告)日：1995-10-03
申请号：US106698
申请日：1993-08-16
申请人： Takuma Yanagisawa , Seiichi Ohsawa
发明人： Takuma Yanagisawa , Seiichi Ohsawa
摘要： A reflective film is formed over a recording surface of an optical disk on which pits are formed. The reflective film is made of a non-linear optical material which, when light is incident thereon, generates second harmonics of the incident light. In a reproduction optical system for reproducing this optical disk, when a reading beam reflected by the reflective film of the optical disk impinges on a filter for filtering out the basic wave of the reading beam, the filter only transmits the second harmonics which are then incident on a light receiver. Since information signals recorded on an optical disk is reproduced by reading only second harmonics of the reflected beam, the cut-off spatial frequency of the OTF can be made twice higher as compared with a conventional reproducing apparatus. In other words, the recording density of the recording medium can be made higher.
摘要翻译： 反射膜形成在其上形成有凹坑的光盘的记录表面上。 反射膜由非线性光学材料制成，当光入射时，其产生入射光的二次谐波。 在用于再现该光盘的再现光学系统中，当由光盘的反射膜反射的读取光束入射到滤光器上以滤除读取光束的基波时，滤光器仅传输随后入射的第二谐波 在光接收器上。 由于通过仅读取反射光束的二次谐波来再现记录在光盘上的信息信号，所以与常规的再现装置相比，OTF的截止空间频率可以提高两倍。 换句话说，可以使记录介质的记录密度更高。
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公开(公告)号：US5615206A
公开(公告)日：1997-03-25
申请号：US522543
申请日：1995-09-01
CPC分类号： G11B7/0052 , G11B7/24 , G11B7/257 , G11B7/258
摘要： Disclosed is an optical disk having rows of pits, corresponding to information signals, formed on a transparent substrate, and a reflective film formed on this substrate. The reflective film is formed of amorphous silicon (a-Si) or indium antimonide (InSb), which exhibits a third-order non-linear optical effect. Thus, the reflectance of the reflective film formed of this material increases nearly in proportion to the intensity of the irradiated beam spot. The beam spot irradiated on the optical disk has the highest intensity at the center portion and this intensity becomes weaker as a point in the spot approaches the edge. Therefore, the effective spot size of the beam spot can be reduced, making it possible to reproduce from the reflection type optical disk information signals with a spatial frequency above the cutoff spatial frequency defined by the reproducing optical system. In other words, a row of pits recorded at a high density can be reproduced. As a change in the reflectance of the reflective film does not alter the structure of the material, the reflective film has a fast response to the reflectance change and is hardly deteriorated by the repetitive change in reflectance.
摘要翻译： 公开了一种具有与在透明基板上形成的信息信号对应的凹坑行的光盘以及形成在该基板上的反射膜。 反射膜由非晶硅（a-Si）或锑化铟（InSb）形成，其呈现三次非线性光学效应。 因此，由该材料形成的反射膜的反射率几乎与照射束斑的强度成比例地增加。 照射在光盘上的光束点在中心部分具有最高的强度，并且当光点接近边缘时该强度变弱。 因此，可以减小光束点的有效光斑尺寸，使得可以从空间频率高于由再现光学系统限定的截止空间频率的反射型光盘信息信号再现。 换句话说，可以再现以高密度记录的一排凹坑。 由于反射膜的反射率的变化不会改变材料的结构，反射膜对反射率变化具有快速响应，并且由于反射率的重复变化几乎不劣化。
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4.发明授权
公开(公告)号：US5365052A
公开(公告)日：1994-11-15
申请号：US111949
申请日：1993-08-26
申请人： Takuma Yanagisawa , Seiichi Ohsawa
发明人： Takuma Yanagisawa , Seiichi Ohsawa
CPC分类号： G11B7/139 , G11B7/1372
摘要： A reflected beam from a reflective film of an optical disk exhibiting light intensity dependency is efficiently received. In the optical system, a collimator lens, a polarization beam splitter, a quarter wave plate and an objective lens are disposed in turn in an optical path between a laser and an optical disk from the laser side. A light receiver is disposed on another optical path extending from the polarization beam splitter. A light receiving aperture diameter of the objective lens for passing the reflected beam from the optical disk therethrough is made larger than an incident aperture diameter of the objective lens for impinging the reading beam on the recording medium. This structure enables information signals to be recorded at higher density on the recording medium to be reproduced.
摘要翻译： 来自表现出光强度依赖性的光盘的反射膜的反射光被有效地接收。 在光学系统中，准直透镜，偏振光束分离器，四分之一波片和物镜依次设置在激光器与激光器之间的光路中。 光接收器设置在从偏振分束器延伸的另一光路上。 用于使来自光盘的反射光束通过的物镜的光接收孔径大于用于将读取光束照射在记录介质上的物镜的入射孔直径。 这种结构使信息信号能够以更高的密度被记录在记录介质上以被再现。
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5.发明授权
公开(公告)号：US5546372A
公开(公告)日：1996-08-13
申请号：US255173
申请日：1994-06-07
申请人： Seiichi Ohsawa , Takuma Yanagisawa
发明人： Seiichi Ohsawa , Takuma Yanagisawa
CPC分类号： G11B7/126
摘要： An information detection light intensity control apparatus in an apparatus reproducing information recorded in an optical disc in which a reflectance has a dependency on an incident light intensity, comprising a light source for emitting an information detection light which enters the optical disc and a control system for controlling an intensity of the information detection light which enters the optical disc so that a ratio of an intensity of the information detection light which enters the optical disc and an intensity of the information detection light reflected from the optical disc is set to a predetermined value. According to the information detection light intensity control apparatus, a spot head value of the information detection light is held to the optimum value by coping with an aberration of a fluctuation such as disc tilt, disc thickness variation, or the like or with a sensitivity fluctuation of a super resolution film so that the information recorded in the super resolution optical disc can be stably reproduced.
摘要翻译： 一种信息检测光强度控制装置，用于再现记录在其中反射率对入射光强度具有依赖性的光盘中的信息，包括用于发射进入光盘的信息检测光的光源和用于 控制进入光盘的信息检测光的强度，使得进入光盘的信息检测光的强度与从光盘反射的信息检测光的强度的比率被设定为预定值。 根据信息检测光强度控制装置，信息检测光的光斑值通过应对诸如光盘倾斜，光盘厚度变化等的波动的像差或者具有灵敏度波动而被保持为最佳值 使得能够稳定地再现记录在超分辨率光盘中的信息。
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公开(公告)号：US07190664B2
公开(公告)日：2007-03-13
申请号：US10257719
申请日：2001-08-03
IPC分类号： G11B7/24
CPC分类号： G11B7/24085 , G11B7/007 , G11B7/261
摘要： An optical disc includes an information recording layer having a record of information as a pit train with a predetermined track pitch and a light-transmissive layer formed on the information recording layer so that the information can be reproduced by a beam of light illuminated through the light-transmissive layer to the information recording layer by an objective lens. The optical disc includes a feature in that a relationship of 0.194(λ/NA)2≦TP ×Tmin≦0.264(λ/NA)2 is satisfied, provided that the track pitch is TP, a pit shortest length is Tmin, a wavelength of the light beam is λ and a numerical aperture of the objective lens is NA. The optical disc also includes a feature in that a pit width is 120 nm or smaller in a range of a track pitch of 0.280 to 0.325 μm.
摘要翻译： 光盘包括信息记录层，其具有作为具有预定轨道间距的凹坑列的信息记录和形成在信息记录层上的透光层，使得可以通过光照射的光束再现信息 透射层通过物镜传送到信息记录层。 该光盘包括一个特征，其中满足0.194（λ/ NA）<2> <= TP×Tmin <= 0.264（λ/ NA）<2>的关系，条件是 轨道间距为TP，凹坑最短长度为Tmin，光束的波长为λ，物镜的数值孔径为NA。 该光盘还包括在轨道间距为0.280〜0.325μm的范围内的凹坑宽度为120nm以下的特征。
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公开(公告)号：US07903048B2
公开(公告)日：2011-03-08
申请号：US11629902
申请日：2005-06-16
申请人： Takuma Yanagisawa
发明人： Takuma Yanagisawa
IPC分类号： G09G5/00
CPC分类号： G01C21/36 , G02B27/01 , G02B2027/0118 , G02B2027/014 , G08G1/0969 , G09B29/108 , G09G3/34 , G09G2300/08
摘要： In an information display apparatus such as a head-up display, while safety is being secured, visibility from a user is improved. Image data having an object such as an arrow showing an advancing direction or a road sign drawn on it are generated as information to be given to the user by a display information generating section 12 and is output to a projector 13. When a light beam R1 corresponding to the image data is emitted from the projector 13 to a combiner 14, reflected light of the light beam R1 and transmitted light of external light R2 are combined in the combiner 14, so as to be viewed by the user. At this time, the display information generating section 12 outputs coordinate values showing a display position of the object to a transmittance control section 16, and the transmittance control section 16 specifies a display region of the object based on the coordinate values, and reduces the transmittance in the specified region of the light control panel 15 so as to reduce a transmitting amount of the external light R2.
摘要翻译： 在诸如平视显示器的信息显示装置中，在确保安全性的同时，提高了用户的可视性。 作为通过显示信息生成部12向用户提供的信息生成具有诸如表示前进方向的箭头的图像数据的图像数据，并且将其输出到投影仪13.当光束R1 对应于图像数据从投影仪13发射到组合器14，将光束R1的反射光和外部光R2的透射光组合在组合器14中，以供用户观看。 此时，显示信息生成部12将表示对象的显示位置的坐标值输出到透射率控制部16，透射率控制部16基于坐标值指定对象的显示区域，并且降低透射率 在光控制面板15的指定区域中，以减少外部光R2的透射量。
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公开(公告)号：US07835237B2
公开(公告)日：2010-11-16
申请号：US11995746
申请日：2006-07-13
申请人： Yasuo Tanahashi , Takuma Yanagisawa
发明人： Yasuo Tanahashi , Takuma Yanagisawa
IPC分类号： G11B7/00
CPC分类号： G11B7/0903 , G11B2007/0006
摘要： There are obtainable reliable and proper tracking correction and CTC even when fluctuations occur in an irradiation position of a sub-beam in a track at the time of performing tracking correction and CTC using three beams. Five beams (a main beam, sub-beams inA and inB, and sub-beams outA and outB) are generated. Reflection beams of the five beams are received, and a differential push pull signal DPPin corresponding to the sub-beams “in” as ± first-order beams and a differential push pull signal DPPout corresponding to the sub-beams “out” as ± second-order beams are generated. By assigning weights to the differential push pull signals DPPin and DPPout and computing the sum of the weighted signals, a tracking error signal Ste having an amplitude value which can perform tracking correction is generated.
摘要翻译： 即使在执行跟踪校正时在轨道中的子光束的照射位置发生波动并且使用三个光束也可以获得可靠和适当的跟踪校正和CTC。 生成五个光束（主光束，A和InB中的子光束，以及子光束outA和outB）。 接收五个光束的反射光束，对应于子光束“in”的差分推挽信号DPPin为±一阶光束，对应于子光束“out”的差分推挽信号DPPout为±秒 生成顺序波束。 通过对差分推挽信号DPPin和DPPout分配权重并计算加权信号的和，产生具有能够执行跟踪校正的振幅值的跟踪误差信号Ste。
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公开(公告)号：US20090103417A1
公开(公告)日：2009-04-23
申请号：US11995746
申请日：2006-07-13
申请人： Yasuo Tanahashi , Takuma Yanagisawa
发明人： Yasuo Tanahashi , Takuma Yanagisawa
IPC分类号： G11B7/00
CPC分类号： G11B7/0903 , G11B2007/0006
摘要： There are obtainable reliable and proper tracking correction and CTC even when fluctuations occur in an irradiation position of a sub-beam in a track at the time of performing tracking correction and CTC using three beams. Five beams (a main beam, sub-beams inA and inB, and sub-beams outA and outB) are generated. Reflection beams of the five beams are received, and a differential push pull signal DPPin corresponding to the sub-beams “in” as ± first-order beams and a differential push pull signal DPPout corresponding to the sub-beams “out” as ± second-order beams are generated. By assigning weights to the differential push pull signals DPPin and DPPout and computing the sum of the weighted signals, a tracking error signal Ste having an amplitude value which can perform tracking correction is generated.
摘要翻译： 即使在执行跟踪校正时在轨道中的子光束的照射位置发生波动并且使用三个光束也可以获得可靠和适当的跟踪校正和CTC。 生成五个光束（主光束，A和InB中的子光束，以及子光束outA和outB）。 接收五个光束的反射光束，对应于子光束“in”的差分推挽信号DPPin为±一阶光束，对应于子光束“out”的差分推挽信号DPPout为±秒 生成顺序波束。 通过对差分推挽信号DPPin和DPPout分配权重并计算加权信号的和，产生具有能够执行跟踪校正的振幅值的跟踪误差信号Ste。
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公开(公告)号：US20070285338A1
公开(公告)日：2007-12-13
申请号：US11662946
申请日：2005-08-25
申请人： Takuma Yanagisawa
发明人： Takuma Yanagisawa
IPC分类号： G09G5/00
CPC分类号： G02B27/0101 , G02B2027/0127 , G02B2027/0138 , H04N5/23293 , H04N5/2621 , H04N5/272
摘要： An image display system includes a camera that shoots a background, a monitor that displays a shot background image, and an optical lens arranged between a display surface of the monitor and an observer. An imaginary image, obtained due to presence of the optical lens, of the monitor image is made to substantially match with a background surface. As a result, when the observer views the background through the monitor, the monitor image and the background look continuous to him.
摘要翻译： 图像显示系统包括拍摄背景的相机，显示拍摄背景图像的监视器和布置在监视器的显示表面和观察者之间的光学透镜。 使得由于光学透镜的存在而获得的监视图像的假想图像与背景表面基本匹配。 结果，当观察者通过监视器观看背景时，监视器图像和背景看起来与他连续。
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