公开(公告)号：AU752875B2

公开(公告)日：2002-10-03

申请号：AU6706298

申请日：1998-05-18

Applicant: SONY CORP

Inventor： OWA HIDEO ,  KOBAYASHI SHOEI ,  SENSYU SUSUMU ,  KATSURAMOTO SHINJI ,  WATANABE TOSHIO ,  MORI HIDENORI ,  YAMAMOTO MASANOBU ,  SAITO MASAKI

IPC: G11B7/007 ,  G11B7/013 ,  G11B7/12 ,  G11B7/135 ,  G11B19/28 ,  G11B20/10 ,  G11B23/033 ,  G11B27/034 ,  G11B27/036 ,  G11B27/10 ,  G11B27/19 ,  G11B27/24 ,  G11B27/30 ,  G11B27/34 ,  G11B27/36 ,  G11B7/125

Abstract: An optical disk apparatus for recording and/or reproducing user data on to and/or from an optical disk (12) includes an optical head (11) with a semiconductor laser (13) for irradiating a laser beam having a wavelength of approximately 680 nm or less to the optical disk (12) and having a lens (17) with a numerical aperture (NA) of approximately 0.7 or more and a working distance of approximately 560 µm or less. By utilizing such apparatus, a relatively large amount of data may be recorded onto the optical disk (12).

公开(公告)号：AU671047B2

公开(公告)日：1996-08-08

申请号：AU8023494

申请日：1994-12-06

Applicant: SONY CORP

Inventor： WATANABE HIDETOSHI ,  SUZUKI HIROTSUGU ,  YAMAMOTO MASANOBU

IPC: G11B23/00 ,  G11B7/26 ,  G11B23/03

公开(公告)号：DE68925759T2

公开(公告)日：1996-07-11

申请号：DE68925759

申请日：1989-06-20

Applicant: SONY CORP

Inventor： OGAWA HIROSHI ,  SAKO YOICHIRO ,  YAMAMOTO MASANOBU

IPC: G11B7/004 ,  G11B7/007 ,  G11B7/013 ,  G11B11/105 ,  G11B19/02 ,  G11B23/36 ,  G11B27/19 ,  G11B27/24 ,  G11B27/30 ,  G11B7/24

Abstract: According to the invention, control data of a predetermined number of bits are pre-recorded on the recording track (3, 23) of a recording medium (1, 21) in the form of burst-like changes of the recording track's width to provide for recording control and reproducing control based on the control data.

公开(公告)号：DE68921058T2

公开(公告)日：1995-06-22

申请号：DE68921058

申请日：1989-12-18

Applicant: SONY CORP

Inventor： TAKANO YOICHI ,  YAMAMOTO MASANOBU

IPC: B29C67/00 ,  C08F290/00 ,  C08F299/00 ,  B29C39/42

Abstract: A three-dimensional object is produced by repeatedly exposing successive layers of liquid photosetting resin (3) at the surface of a quantity of the resin (3) stored in a vessel (2) to a light beam (21) so as to change each light beam exposed layer of the liquid photosetting resin (3) into a solidified layer, stepwise incrementally moving each solidified layer downward into the liquid photosetting resin (3) in the vessel (2) so that a new layer of the liquid photosetting resin (3) is coated on the solidified layer, detecting the temperature of the liquid photosetting resin (3), and heating the liquid photosetting resin (3) in accordance with the detected temperature to maintain the fluidity of the liquid photosetting resin (3).

公开(公告)号：DE68920716T2

公开(公告)日：1995-06-08

申请号：DE68920716

申请日：1989-11-29

Applicant: SONY CORP

Inventor： OGAWA HIROSHI ,  KATSURAMOTO SHINJI ,  YAMAMOTO MASANOBU

IPC: G11B7/0045 ,  G11B7/09 ,  G11B7/125 ,  G11B19/02 ,  G11B7/00

Abstract: The present invention is concerned with control and detection of a laser beam for an optical disc recording/reproducing apparatus in which the intensity of a return laser beam reflected by an optical recording medium of a recording laser beam used for forming pits (P) and recording data on the recording medium during the recording mode is detected and an error signal including focusing and tracking error signals of the recording laser beam is formed on the basis of a detection output of the intensity of the return laser beam within a predetermined time interval ( tau ) before the pit (P) starts to be formed by the recording laser beam on the recording medium to control the recording laser beam, and in which, when recording data on the optical recording medium having sub-data previously recorded thereon as pre-grooves with wobbling, these sub-data are detected on the basis of the detection output of the return laser beam within said predetermined time interval ( tau ) or within a predetermined time interval other than said predetermined time interval ( tau ).

公开(公告)号：GB2246439B

公开(公告)日：1994-06-29

申请号：GB9116122

申请日：1991-07-25

Applicant: SONY CORP

Inventor： YAMAMOTO MASANOBU ,  ITOH KAZUMINE

IPC: B29C35/08 ,  B29C67/00 ,  B29K105/24 ,  G05D9/12

Abstract: Apparatus is provided for forming a three-dimensional structure by sequentially laminating hard resin layers by repeatedly irradiating the surface of a liquid photosetting resin (A) with a light beam in a pattern corresponding to the pattern of one of a plurality of parallel decomposed planes obtained by slicing an optional stereographic image and then spreading another layer of resin over the hard resin layer. To obtain an accurate pattern the beam diameter needs to be constant requiring a uniform layer thickness and accurate level control. To achieve this the main tank (2) of the apparatus includes a lead control system comprising a supply tank (8), means to supply resin from the supply tank to the main tank at a rate such that it overflows a wall portion (9) of tank and means to return the overflow to the supply tank. The overflow may be drawn off by suction. The level may be further adjusted by lowering into the tank, a bar controlled by a laser level sensor.

公开(公告)号：AT105962T

公开(公告)日：1994-06-15

申请号：AT88306972

申请日：1988-07-28

Applicant: SONY CORP

Inventor： YAMAMOTO MASANOBU ,  ENDOH SOHMEI

IPC: G11B7/26 ,  G11B7/00 ,  G11B7/0045 ,  G11B7/007 ,  G11B7/125 ,  G11B7/08 ,  G11B23/00

Abstract: There are provided an optical disc (1) and an optical recording apparatus to form a tracking groove onto an optically recordable disc. This apparatus comprises a recording beam generator (2) to generate a recording beam such as a laser beam having a predetermined spot size so as to form a pattern of a predetermined width onto the disc; a light deflector (6) arranged on an optical path of the recording beam generator; and a driver (12) for driving the light deflector (6), for reciprocatingly moving the recording beam in a radial direction of the disc (1) at a high frequency, and for multi-exposing the disc (1) by the recording beam due to the movement of the recording beam in the radial direction, thereby a groove having a width wider than the pattern of the predetermined width is formed. With this apparatus, both of the discrete information pattern and a groove are formed by using a single recording beam. Namely, both of the pits and a wide groove can be formed by using a single recording spot.

公开(公告)号：CA2023697A1

公开(公告)日：1991-02-23

申请号：CA2023697

申请日：1990-08-21

Applicant: SONY CORP

Inventor： ENDOH SOHMEI ,  YAMAMOTO MASANOBU

IPC: G11B7/24 ,  G11B7/013 ,  G11B7/09

Abstract: An optical disk including a disk substrate having guide grooves in one of a spiral shape and a concentric shape, and pits formed between adjacent guide grooves according to predetermined information signals such as address information signals, etc. An optical recording layer is formed in the shape of a thin film on the disk substrate. The guide grooves have a depth ranging from about .lambda./8 to about .lambda./4 and the pits have a depth ranging from about .lambda./4 to about .lambda./2, where .lambda. is a wavelength of a reproducing light beam.

公开(公告)号：AU552655B2

公开(公告)日：1986-06-12

申请号：AU8880182

申请日：1982-09-28

Applicant: SONY CORP

Inventor： YAMAMOTO MASANOBU ,  UMEZU NOBUHIKO

IPC: G02F1/11 ,  G02F1/33 ,  G06K15/12 ,  G11B7/00 ,  G11B7/125 ,  G11B7/128 ,  H04N5/90

Abstract: A light modulating apparatus for use with a recording apparatus for recording an information signal on a recording medium includes a light source and an acousto-optic modulator for modulating light emitted from the light source in response to a first electrical signal and thereby producing a modulated light signal for acting on the recording medium. Additionally, the apparatus includes an information signal source for providing an information signal, a high frequency oscillator for producing a carrier signal, a signal modulator for modulating the carrier signal by the information signal and providing therefrom the first electrical signal, and a photo-detector for detecting the modulated light signal and producing in response thereto a second electrical signal. The apparatus further comprises a peak-holding circuit for holding substantially a peak value of the second electrical signal, a comparator for comparing the peak value of the second electrical system with a reference signal and providing a corresponding error signal, and an amplitude modulator for controlling the amplitude of the carrier signal in accordance with the error signal.

公开(公告)号：GB2122408A

公开(公告)日：1984-01-11

申请号：GB8315551

申请日：1983-06-07

Applicant: SONY CORP

Inventor： YAMAMOTO MASANOBU ,  OGAWA HIROSHI

IPC: B41M5/26 ,  G11B7/00 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/013 ,  G11B7/30 ,  G11B20/10 ,  G11B20/14

Abstract: Digital signals representative of three or more values are recorded on an optical disc 9 in which the depths of pits are determined in dependence on the exposure amount of a laser beam.