公开(公告)号：DE69231042T2

公开(公告)日：2000-09-28

申请号：DE69231042

申请日：1992-02-07

Applicant: SONY CORP

Inventor： OHTA MASUMI ,  NAKAO ISAMU ,  UDAGAWA TOSHIKI ,  FUKUMOTO ATSUSHI ,  YOSHIMURA SHUNJI

IPC: G11B11/105 ,  G11B19/12 ,  G11B11/10

Abstract: The present invention concerns an apparatus for recording and/or reproducing on/from a magneto-optical recording medium (10). This apparatus comprises means (62) for generating a first channel clock used to write and/or read data in and/or from a first magneto-optical recording medium (10). The first magneto-optical recording medium (10) has a recording layer (13), the reproducing layer (11) and an intermediate layer (12) for magnetically coupling the recording layer (13) the reproducing layer (11) in stationary state, in which a magnetic coupling between said recording layer (13) and said reproducing layer (11) is lost in area (14) in which the temperature is increased to be higher than a predetermined temperature by the radiation of a light upon reproducing and in which a recorded information held on said recording layer (13) is read out from said reproducing layer (11) in the radiated area (5) except the area (14) in which said magnetic coupling is lost. Furthermore, the apparatus comprises means (62) for generating a second channel clock used to write and/or read data in and/or from a second magneto-optical recording medium (10) in which a recorded information is reproduced by using substantially whole area of the radiated area (5). Moreover, the apparatus comprises a discriminating means (70) for discriminating said first magneto-optical recording medium (10) and the second magneto-optical recording medium (10) and means (40) for switching first and second channel clocks in response to a discriminating signal from said discriminating means (70).

公开(公告)号：DE69225252T2

公开(公告)日：1998-12-17

申请号：DE69225252

申请日：1992-02-06

Applicant: SONY CORP

Inventor： OHTA MASUMI ,  NAKAO ISAMU ,  ARATANI KATSUHISA ,  NAKAOKI ARIYOSHI ,  KANEKO MASAHIKO

IPC: G11B11/10 ,  G11B5/84 ,  G11B11/105

Abstract: A magneto-optical recording medium has at least a reproducing layer and a recording layer which are magnetically coupled with each other. The reproducing layer permits recorded signals to be read out according to its change in state of magnetization. The reproducing layer has a thickness in a range from 150 ANGSTROM to 1000 ANGSTROM . Additionally, the magneto-optical recording layer has a layer of a good heat conductor attached thereto. Furthermore, the reproducing layer or the auxiliary reproducing layer is formed of layers of rare earth metal and layers of transition metal which are laminated in alternating fashion.

公开(公告)号：DE69225159D1

公开(公告)日：1998-05-28

申请号：DE69225159

申请日：1992-02-07

Applicant: SONY CORP

Inventor： OHTA MASUMI ,  NAKAO ISAMU ,  UDAGAWA TOSHIKI ,  FUKUMOTO ATSUSHI ,  YOSHIMURA SHUNI

IPC: G11B11/105 ,  G11B19/12 ,  G11B11/10

Abstract: The present invention concerns an apparatus for recording and/or reproducing on/from a magneto-optical recording medium (10). This apparatus comprises means (62) for generating a first channel clock used to write and/or read data in and/or from a first magneto-optical recording medium (10). The first magneto-optical recording medium (10) has a recording layer (13), the reproducing layer (11) and an intermediate layer (12) for magnetically coupling the recording layer (13) the reproducing layer (11) in stationary state, in which a magnetic coupling between said recording layer (13) and said reproducing layer (11) is lost in area (14) in which the temperature is increased to be higher than a predetermined temperature by the radiation of a light upon reproducing and in which a recorded information held on said recording layer (13) is read out from said reproducing layer (11) in the radiated area (5) except the area (14) in which said magnetic coupling is lost. Furthermore, the apparatus comprises means (62) for generating a second channel clock used to write and/or read data in and/or from a second magneto-optical recording medium (10) in which a recorded information is reproduced by using substantially whole area of the radiated area (5). Moreover, the apparatus comprises a discriminating means (70) for discriminating said first magneto-optical recording medium (10) and the second magneto-optical recording medium (10) and means (40) for switching first and second channel clocks in response to a discriminating signal from said discriminating means (70).

公开(公告)号：AT165689T

公开(公告)日：1998-05-15

申请号：AT92102019

申请日：1992-02-06

Applicant: SONY CORP

Inventor： OHTA MASUMI ,  NAKAO ISAMU ,  ARATANI KATSUHISA ,  NAKAOKI ARIYOSHI ,  KANEKO MASAHIKO

IPC: G11B11/10 ,  G11B5/84 ,  G11B11/105

Abstract: A magneto-optical recording medium has at least a reproducing layer and a recording layer which are magnetically coupled with each other. The reproducing layer permits recorded signals to be read out according to its change in state of magnetization. The reproducing layer has a thickness in a range from 150 ANGSTROM to 1000 ANGSTROM . Additionally, the magneto-optical recording layer has a layer of a good heat conductor attached thereto. Furthermore, the reproducing layer or the auxiliary reproducing layer is formed of layers of rare earth metal and layers of transition metal which are laminated in alternating fashion.

公开(公告)号：DE69218986D1

公开(公告)日：1997-05-22

申请号：DE69218986

申请日：1992-02-07

Applicant: SONY CORP

Inventor： NAKAO ISAMU ,  FUKUMOTO ATSUSHI ,  UDAGAWA TOSHIKI ,  YOSHIMURA SHUNJI

IPC: G11B11/10 ,  G11B11/105 ,  G11B13/04

Abstract: A method and apparatus for recording and reproducing information onto and from a magneto-optic recording medium (100) is disclosed. The magneto-optic recording medium (100) has at least a reproducing layer (110) and a recording layer (130). A recording optical head (51) records information on the magneto-optic recording medium (100). A reproducing optical head (61) has a reading light beam for reading information recorded in a region within a spot of the reading light beam by magneto-optic effect by changing a state of magnetization of the reproducing layer (110) and at the same time irradiating the recording medium (100) with the light beam. A wavelength of the recording light beam emitted by the recording optical head (51) is substantially smaller than a wavelength of the reading light beam emitted by the reading optical head. A minimum ratio of the wavelength of the recording light beam to that of the reproducing light beam is 1:3.

公开(公告)号：DE69212656T2

公开(公告)日：1997-03-20

申请号：DE69212656

申请日：1992-02-06

Applicant: SONY CORP

Inventor： OHTA MASUMI ,  NAKAO ISAMU ,  ARATANI KATSUHISA

IPC: G11B11/10 ,  G11B11/105

Abstract: A magneto-optic recording and reproducing medium is formed of a reproduction layer composed mainly of GdFeCo and having a saturation magnetization of at least 450 emu/cc and a coercive force of not more than 4 kOe, and a recording layer composed mainly of TbFeCo, having a coercive force of at least 5 kOe, and having a magnetization of not more than 300 emu/cc when it is a transition metal-predominant film and not more than 200 emu/cc when it is a rare earth-predominant film.

公开(公告)号：CA2060548A1

公开(公告)日：1992-08-09

申请号：CA2060548

申请日：1992-02-03

Applicant: SONY CORP

Inventor： OHTA MASUMI ,  NAKAO ISAMU ,  ARATANI KATSUHISA

IPC: G11B11/10 ,  G11B11/105

Abstract: A magneto-optic recording and reproducing medium is formed of a reproduction layer composed mainly of GdFeCo and having a saturation magnetization of at least 450 emu/cc and a coercive force of not more than 4 kOe, and a recording layer composed mainly of TbFeCo, having a coercive force of at least 5 kOe, and having a magnetization of not more than 300 emu/cc when it is a transition metal-predominant film and not more than 200 emu/cc when it is a rare earth-predominant film.

公开(公告)号：CA2060547A1

公开(公告)日：1992-08-09

申请号：CA2060547

申请日：1992-02-03

Applicant: SONY CORP

Inventor： OHTA MASUMI ,  NAKAO ISAMU ,  ARATANI KATSUHISA

IPC: G11B11/105 ,  G11B11/10

Abstract: A magneto-optical recording medium has a multi-layer magnetic film structure comprising a reproducing layer, an intermediate layer, and a record holding layer. These layers are magnetically coupled to one another. The recording medium is irradiated with a laser beam and appropriate magnetic fields are provided such that in a area of a spot of the laser beam on the recording medium, first, second and third regions are formed as a result of a temperature distribution within the laser beam spot. The first and third regions act as masking regions, with the second region between the first and third regions being a region from which magnetic signals stored in the record hold layer are transferred to the reproducing layer and are read out from the reproducing layer. In the first embodiment, the magnetic domains of the first and third regions are opposite one another in the reproducing layer. In a second embodiment of the invention, an auxiliary reproducing layer is also provided between the reproducing layer and the intermediate layer. In a third embodiment of the invention, at a high temperature region of the spot the intermediate layer is heated to a temperature not lower than a Curie temperature of the intermediate layer, and the reproducing layer, intermediate layer and record hold layer are formed so as to meet the expression H, + HCA

公开(公告)号：EP3128360A4

公开(公告)日：2018-04-04

申请号：EP15772664

申请日：2015-03-17

Applicant: SONY CORP

Inventor： FUKUMA YOHEI ,  ONO HIROYUKI ,  KANEDA KAZUMASA ,  NAKAO ISAMU

IPC: G02B27/22 ,  G06F3/01 ,  G09F9/00 ,  G09F9/40 ,  H04N5/66

CPC classification number: G06F1/1647 ,  G02B27/2242 ,  G06F1/1639 ,  G06F3/01 ,  G06F3/042 ,  G06F3/0488 ,  G06F2203/04108 ,  G09G3/002 ,  G09G2354/00 ,  H04N5/66 ,  H04N5/74

Abstract: An electronic apparatus includes a first display section (10) and a second display section (20) that are disposed in proximity to each other beneath a principal surface (50A) of a housing (50). The first display section generates a first image (image 100, image light L1) on the principal surface, and the second display section generates a picture imaged in the air as a second image (image 200, image light L2).

公开(公告)号：EP1637872A4

公开(公告)日：2012-01-18

申请号：EP04736587

申请日：2004-06-10

Applicant: SONY CORP

Inventor： MAMINE TAKAYOSHI ,  SAKAMOTO YASUHIRO ,  FURUKI MOTOHIRO ,  NAKAO ISAMU

IPC: G01N21/64 ,  C12M1/00 ,  C12N15/09 ,  C12Q1/68 ,  G01N21/25 ,  G01N33/53 ,  G01N33/536 ,  G01N33/58 ,  G01N35/00 ,  G01N37/00

CPC classification number: G01N21/6452 ,  G01N21/6428 ,  G01N33/582 ,  G01N35/00069 ,  G01N2021/6482