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公开(公告)号：JP2000298875A
公开(公告)日：2000-10-24
申请号：JP18684399
申请日：1999-06-30
Applicant: SONY CORP
Inventor： KASAMI YUTAKA , KAWAKUBO SHIN , SEO KATSUHIRO
Abstract: PROBLEM TO BE SOLVED: To achieve improved direct overwriting under high-speed and high- density conditions without reducing repetition durability and the storage stability of a recorded signal. SOLUTION: The optical recording medium at least has a recording layer made of a phase-change material, and records and reproduces a signal by a laser beam with a wavelength of 380 nm-420 mn. In the optical recording medium, a ratio Ac/Aa of an absorption rate Ac when a recording layer 2 is in a crystal state to an absorption rate Aa when the recording layer 2 is in an amorphous state is equal to or more than 0.9, and crystallization acceleration layers 3 and 4 for accelerating the crystallization of the phase change material in contact with at least one surface of the recording layer 2 are formed. By sharing absorption rate control and crystallization acceleration, the difference between crystal and amorphous physical properties can be securely compensated for, thus achieving improved direct overwrite.
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公开(公告)号：JPH10302310A
公开(公告)日：1998-11-13
申请号：JP10966297
申请日：1997-04-25
Applicant: SONY CORP
Inventor： KAWAKUBO SHIN , KASHIWAGI TOSHIYUKI , YASUDA KOICHI , KANEKO MASAHIKO
Abstract: PROBLEM TO BE SOLVED: To provide an optical recording medium with which the recording of a larger capacity is possible. SOLUTION: This optical recording medium is constituted by forming a base 10 which consists of a thermoplastic resin and has a thickness of 0.3 to 1.2 mm, guide grooves 11 on this base 10, an information recording layer 15 which consists of at least a reflection film 13 and an org. dyestuff recording layer 14 successively on these guide groves 11 and a light transparent layer 12 of a thickness 10 to 177 μm. This optical recording medium is so formed that the relation of Δt ) (μm), (N.A. is a numerical aperture) is satisfied between the N.A. of an optical system for reproducing or recording and reproducing and a wavelength λwhen the unevenness of the light transparent layer thickness is defined as Δt.
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公开(公告)号：JPH0828188B2
公开(公告)日：1996-03-21
申请号：JP8675984
申请日：1984-04-27
Applicant: SONY CORP
Inventor： YOKONO SHIGERU , KAWAKUBO SHIN , MUNEMOTO EIJI , TOYOKAWA MITSURU
IPC: H01J17/49
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公开(公告)号：JPH07153046A
公开(公告)日：1995-06-16
申请号：JP29550893
申请日：1993-11-25
Applicant: SONY CORP
Inventor： KAWAKUBO SHIN , TAKEDA RITSU , WATANABE KENJIRO
Abstract: PURPOSE:To manufacture a magnetic disc easily and in a mass-production basis by a method wherein a magnetic layer is formed on the surface of a nonmagnetic substrate which an information uneven pit row is formed and the parts of the magnetic layer on the bottom surfaces of the uneven pits and the parts of the magnetic layer on the upper surfaces of the uneven pits are magnetized in respective directions opposite to each other. CONSTITUTION:An information uneven pit row SL is formed on a nonmagnetic substrate 11. A magnetic layer 12 is formed on the surface of the substrate 11 on which the information uneven pit row SL is formed including the bottom surfaces, i.e., the recessed parts 14, of the information uneven pits and the upper surfaces, i.e., the protruding parts 13, of the information uneven pits. Then the parts of the magnetic layer 12 on the recessed parts 14 of the information uneven pits and the parts of the magnetic layer 12 on the protruding parts 13 of the information uneven pits are magnetized in respective directions (m1) and (m2) opposite to each other. The information is magnetically read out. With this constitution, a pickup apparatus which is simple in structure and low in cost can be obtained and hence the power consumption can be saved.
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公开(公告)号：JP2012216267A
公开(公告)日：2012-11-08
申请号：JP2011081634
申请日：2011-04-01
Inventor： SAKAMOTO TETSUHIRO , SAITO KIMIHIRO , UCHIYAMA HIROSHI , MIYAMOTO HIROTAKA , KOBAYASHI SEIJI , KAWAKUBO SHIN , NAKANO ATSUSHI , YAMATSU HISAYUKI
IPC: G11B7/004 , G11B7/0045 , G11B7/007 , G11B7/24
CPC classification number: G11B7/00452 , G11B7/2405 , G11B2007/0009
Abstract: PROBLEM TO BE SOLVED: To facilitate adjustment to a correct S/N ratio by multilayer recording and enable the device size to be reduced.SOLUTION: The refractive indices of a first layer 4 and a second layer 5 are made different by appropriately condensing laser beams onto the vicinities of interfaces of an optical recording medium in which a plurality of interfaces are formed between the first layer and the second layer and forming modulation of the refractive indices not so intense as to form a blank mark and/or forming a record mark entailing changes in the shapes of the interfaces, which are thereby caused to function as reflective faces. This enables determination of the presence or absence of any mark (reproduction of recorded signals) to be accomplished by utilizing the optical path length difference (phase difference) of reflected beams arising between any mark-formed part and elsewhere. As this is phase difference detection, it is possible to avoid a tradeoff relationship between enhancement of the reproduced signal level and restraint of crosstalk in the depthwise direction, adjustment to a correct S/N ratio is made easier than by the conventional void recording system. No laser power strong enough to record any void (blank) is needed, and both the light source and the device can be reduced in size.
Abstract translation: 要解决的问题：为了便于通过多层记录调整到正确的S / N比，并且能够减小器件尺寸。 解决方案：通过将激光束适当地聚集到光记录介质的界面附近，第一层4和第二层5的折射率不同，其中在第一层和第二层之间形成多个界面 第二层并且形成不太强烈的折射率的调制以形成空白标记和/或形成引起接口形状变化的记录标记，从而导致其作为反射面。 这可以通过利用在任何标记形成的部分和其他地方之间产生的反射光束的光程长度差（相位差）来确定是否存在任何标记（记录信号的再现）。 由于这是相位差检测，因此可以避免再生信号电平的增强与深度方向的串扰的抑制之间的权衡关系，因此比常规的空白记录系统更容易调整正确的S / N比。 无需激光功率足以记录任何空白（空白），并且光源和设备的尺寸都可以减小。 版权所有（C）2013，JPO＆INPIT
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Patent Agency Ranking
公开(公告)号：JP2010165416A
公开(公告)日：2010-07-29
申请号：JP2009006930
申请日：2009-01-15
Inventor： NAKAOKI ARIKATSU , KAWAKUBO SHIN
CPC classification number: G11B7/0037 , G11B7/127
Abstract: PROBLEM TO BE SOLVED: To obtain a large capacity optical disk with a compact device configuration. SOLUTION: An optical disk reproduction device 20 emits a light beam L constituted by a peculiar output light LE from a semiconductor laser 3 which is incorporated in an optical pickup 27. By condensing the light beam into a local mark MP formed on a recording layer 100S of an optical disk 100, the optical disk reproduction device can generate, from the local mark MP, a return light beam Lr having 2-bit information modulated in each wavelength band. By extracting codes after detecting first intensity V1 and second intensity V2 through spectrum analysis, the optical disk reproduction device can reproduce the information. Thus, information modulated in each wavelength band can be reproduced with a relatively compact structure, as in a case when a general picosecond laser or a femtosecond laser is used. COPYRIGHT: (C)2010,JPO&INPIT
Abstract translation: 要解决的问题：获得具有紧凑设备配置的大容量光盘。 解决方案：光盘再现装置20发射由结合在光拾取器27中的半导体激光器3由特有的输出光LE构成的光束L.通过将光束聚光成形成在 记录层100S，光盘再现装置可以从本地标记MP产生具有在每个波长带中调制的2位信息的返回光束Lr。 通过在通过频谱分析检测到第一强度V1和第二强度V2之后提取代码，光盘再现装置可以再现信息。 因此，与使用一般的皮秒激光或飞秒激光的情况相比，能够以比较紧凑的结构再生在各波长带中调制的信息。 版权所有（C）2010，JPO＆INPIT
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公开(公告)号：JPH05210132A
公开(公告)日：1993-08-20
申请号：JP22435092
申请日：1992-08-24
Applicant: SONY CORP
Inventor： YAMADA MASAHIRO , NADA NAOJI , KAWAKUBO SHIN
Abstract: PURPOSE:To obtain polarization inversion structures with good controllability by averting the surface contamination, change in refractive index, etc., of a substrate consisting of lithium niobate LN or lithium tantalate LT. CONSTITUTION:The polarization inversion structures 30 are formed by disposing 1st and 2nd electrodes 1 and 2, in the polarization direction shown by arrows d of the substrate 10 consisting of the monodomained LN or LT, forming at least the 1st electrodes 1 to the patterns corresponding to the patterns of the polarization inversion structures 30 to be finally obtd., confining the distances between the 1st and 2nd electrodes 1 and 2 to
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公开(公告)号：JPH04296730A
公开(公告)日：1992-10-21
申请号：JP6201491
申请日：1991-03-26
Applicant: SONY CORP
Inventor： TAGUCHI AYUMI , YAMADA MASAHIRO , KIJIMA KOUICHIROU , KAWAKUBO SHIN
Abstract: PURPOSE:To surely form the polarization inverting structure without exerting any influence on the optical characteristics of the ferroelectric substance by locally heating only a position where necessary polarization inversion is caused. CONSTITUTION:An electric heating body 3 is adhered to the surface of ferroelectric crystal 1, made of, for example, single-area LiNbOa3(LN), which constitutes a main surface 1a in pattern corresponding to the pattern of the polarization inverting structure of the ferroelectric single crystal 1. This electric heating body 3 can be patterned by photolithographic etching after a conductor layer is vapor-deposited over the entire surface by sputtering. This electric heating body 3 is energized on to generate the temperature gradient of an abrupt temperature drop in the depth direction from the side of the main surface 1a right before the part of the ferroelectric crystal 1 where the electric heating body 3 is adhered. Consequently, an electric field is produced by pyroelectric effect at the heated part from the inside to the main surface 1a and a polarization inverted part 2 shown by an arrow (b) in the opposite direction from an arrow (a) is formed in the ferroelectric crystal 1 opposite the main surface 1a.
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公开(公告)号：JPS63253540A
公开(公告)日：1988-10-20
申请号：JP8756487
申请日：1987-04-09
Applicant: SONY CORP
Inventor： HORIGOME HIDEYOSHI , NISHIDA NORIO , KAWAKUBO SHIN
IPC: G11B7/085
Abstract: PURPOSE:To stabilize the track shifting of an optical disk in a short time, by detecting the zero crossing point when an optical beam crosses each address signal recording area of plural adjacent tracks by means of a tracking error detecting means. CONSTITUTION:When track shifting is started, the output B of a system controlling circuit 30 becomes 'H' and a switch 43 is connected to S side. In addition, tracking error signals are supplied to a zero crossing detecting circuit 34 from a subtractor 25. When the scanning locus Lop of an optical beam passes the final servo byte (3n) of a sector and the time of the quantity of several bytes has passed, the signal B of the system controlling circuit 30 becomes '0' and the switch 43 is switched to its central contact. Analog push-pull tracking signals supplied to the zero crossing detecting circuit 34 from a subtractor 41 and an original zero crossing point is accurately detected at the intermediate point between two adjacent tracks 1i and 1j.
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公开(公告)号：JPS60221927A
公开(公告)日：1985-11-06
申请号：JP7921784
申请日：1984-04-19
Applicant: SONY CORP
Inventor： KAWAKUBO SHIN , YOKONO SHIGERU , OKUHORA AKIHIKO , MUNEMOTO EIJI
Abstract: PURPOSE:To improve the discharge characteristic by forming LaB6 cathode with LaB6 powder thermally processed under inert gas ambient after atomization. CONSTITUTION:LaB6 is atomized into fine powder then cleaned with pure water to remove impurity. Then it is thermally treated under inert gas ambient such as N2 or foaming gas under the temperature of 1,000-1,500 deg.C, for about 1-2hr. Consequently, impurities are removed from the surface of micro particle of LaB6 while the surface area is reduced to achieve stabilization. Then thermally processed LaB6 is employed to form LaB6 cathode through thick film printing method or electrodeposition resulting in improvement of burning phenomena of display pattern and reduction of aging of display quality.
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