公开(公告)号：HK1046327A1

公开(公告)日：2003-01-03

申请号：HK02107475

申请日：2002-10-15

Applicant: SONY CORP

Inventor： YAMAMOTO KENJI ,  OSATO KIYOSHI ,  MAEDA FUMISADA

IPC: G02B7/02 ,  G02B7/08 ,  G02B13/00 ,  G11B7/09 ,  G11B7/125 ,  G11B7/135 ,  G11B7/1374 ,  G11B7/1378 ,  G11B ,  G02B

Abstract: An optical head has achromatic lenses which a blue or blue-violet laser beam from a laser diode strikes, object lenses for condensing the laser beam passing through the achromatic lenses on an optical disc, lens holders and for holding the achromatic lenses and the object lenses so that their optical axes coincide, and actuators and for moving the lens holders in the focus direction and/or tracking direction of the optical disc. The lens holders are fixed to each other and the lenses are moved as one part by the actuators.

公开(公告)号：DE69328385D1

公开(公告)日：2000-05-18

申请号：DE69328385

申请日：1993-06-18

Applicant: SONY CORP

Inventor： EGUCHI NAOYA ,  MAEDA FUMISADA

IPC: G11B7/125 ,  G11B7/22 ,  H01S3/02 ,  H01S3/109

Abstract: An optical pickup apparatus comprises a laser light beam radiating device (10) having a laser medium (16) arranged between a pair of mirror members (13, 14) constituting a resonator, a laser light source (11) for radiating a laser light from an incident side one of said mirror members (13, 14) for exciting said laser medium (16), a non-linear optical crystal element (17) irradiated with a light beam emanated from said laser medium (16), a deflective mirror (19) for deviating the optical axis of the laser light beam from one of said mirror members (13, 14) and a casing (60) having housed therein said mirror members (13, 14), said laser medium (16), said laser light source (11), said non-linear optical crystal element (17) and said deflective mirror (19), said casing also having an optical element (63) exhibiting wavelength selectively mounted obliquely with respect to an optical axis of the laser light beam radiated from one of said mirror members (13, 14). A beam expander (23) is arranged on an optical axis of a light beam radiated from said laser light beam radiating device (10) and deflected by said deflective mirror (19).

公开(公告)号：DE69325938D1

公开(公告)日：1999-09-16

申请号：DE69325938

申请日：1993-04-15

Applicant: SONY CORP

Inventor： MAEDA FUMISADA ,  MATSUMOTO YOSHINORI

IPC: G11B5/02 ,  G11B11/10 ,  G11B11/105

公开(公告)号：DE69321065T2

公开(公告)日：1999-05-20

申请号：DE69321065

申请日：1993-06-18

Applicant: SONY CORP

Inventor： EGUCHI NAOYA ,  MAEDA FUMISADA

IPC: G11B7/125 ,  G11B7/22 ,  H01S3/02 ,  H01S3/109 ,  G11B7/08

Abstract: An optical pickup apparatus comprises a laser light beam radiating device (10) having a laser medium (16) arranged between a pair of mirror members (13, 14) constituting a resonator, a laser light source (11) for radiating a laser light from an incident side one of said mirror members (13, 14) for exciting said laser medium (16), a non-linear optical crystal element (17) irradiated with a light beam emanated from said laser medium (16), a deflective mirror (19) for deviating the optical axis of the laser light beam from one of said mirror members (13, 14) and a casing (60) having housed therein said mirror members (13, 14), said laser medium (16), said laser light source (11), said non-linear optical crystal element (17) and said deflective mirror (19), said casing also having an optical element (63) exhibiting wavelength selectively mounted obliquely with respect to an optical axis of the laser light beam radiated from one of said mirror members (13, 14). A beam expander (23) is arranged on an optical axis of a light beam radiated from said laser light beam radiating device (10) and deflected by said deflective mirror (19).

公开(公告)号：ID20342A

公开(公告)日：1998-12-03

申请号：ID980328

申请日：1998-03-05

Applicant: SONY CORP

Inventor： YAMAMOTO KENJI ,  ICHIMURA ISAO ,  MAEDA FUMISADA ,  WATANABE TOSHIO ,  SUZUKI AKIRA ,  OHSATO KIYOSHI

IPC: G11B7/135 ,  G11B7/1372 ,  G11B7/1374 ,  G11B7/22 ,  G11B7/09

Abstract: An optical pickup incorporates a two-lens system with first and second lenses (13) and (14) being arranged in the following manner: the first lens has a first surface (15) to receive a laser beam radiated from a semiconductor laser and a second surface (16) to direct the laser beam transmitted from the first surface (15) towards the second lens (14); the second lens (14) has a third surface (17) to receive the light flux transmitted from the second surface (16) and a fourth surface (18) to direct the light flux transmitted from the third surface (17) towards an optical disc placed opposite thereto; and the first and fourth surfaces (15, 18) are used as a reference during positioning. The aberrations of the optical pickup are limited within a tolerable limit without incorporating a special device for that purpose even if errors arise in thickness of component lenses of a two-lens system constituting an element of the pickup.

公开(公告)号：AU4275797A

公开(公告)日：1998-04-30

申请号：AU4275797

申请日：1997-10-21

Applicant: SONY CORP

Inventor： YAMAMOTO KENJI ,  ICHIMURA ISAO ,  MAEDA FUMISADA ,  WATANABE TOSHIO ,  OHSATO KIYOSHI

IPC: G02B13/00 ,  G02B3/02 ,  G02B9/06 ,  G02B13/18 ,  G02B13/24 ,  G11B7/1374 ,  G02B1/00 ,  G02B11/02

Abstract: An objective lens having a doublet structure and a numerical aperture of 0.7 or more and an optical pickup apparatus having this objective lens are adapted to an optical recording medium having a high information recording density, the objective lens being structured such that at least one side is formed into a aspheric surface and the lens elements (3, 4) are made of low-diffusion glass having an Abbe's number of 40 or greater.

公开(公告)号：CA2218675A1

公开(公告)日：1998-04-24

申请号：CA2218675

申请日：1997-10-21

Applicant: SONY CORP

Inventor： YAMAMOTO KENJI ,  ICHIMURA ISAO ,  OHSATO KIYOSHI ,  WATANABE TOSHIO ,  MAEDA FUMISADA

IPC: G02B13/00 ,  G02B3/02 ,  G02B9/06 ,  G02B13/18 ,  G02B13/24 ,  G11B7/1374 ,  G02B3/04 ,  G02B11/02 ,  G11B7/12 ,  G11B7/13

Abstract: An objective lens having a doublet structure and a number of apertures of 0.7 or more and an optical pickup apparatus having the objective lens to be adaptable to a optical recording medium having a high information recording density, the objective lens being structured such that at least one side is formed into a aspheric surface and the lens elements are made of low-diffusion glass having an Abbe's number of 40 or greater.

公开(公告)号：BRPI0918544A2

公开(公告)日：2015-12-01

申请号：BRPI0918544

申请日：2009-09-16

Applicant: SONY CORP

Inventor： SUZUKI AKIRA ,  MAEDA FUMISADA ,  TANAKA KAYOKO ,  SAKAIGAWA SACHIKO ,  KATO YOSHIAKI

IPC: G02B3/14

公开(公告)号：MY141564A

公开(公告)日：2010-05-14

申请号：MYPI20061460

申请日：2006-03-31

Applicant: SONY CORP

Inventor： KATO YOSHIAKI ,  MAEDA FUMISADA

IPC: G02B1/06

Abstract: A VARIABLE FOCUS LENS CONTAINS A CONDUCTIVE LIQUID MATERIAL PORTION (1) AND AN INSULATIVE LIQUID MATERIAL PORTION (2) IN A CYLINDRICAL CONTAINER (10) AND INCLUDES A FIRST ELECTRODE (21) WHICH APPLIES VOLTAGE TO THE CONDUCTIVE LIQUID MATERIAL PORTION THROUGH A DIELECTRIC LAYER AND A SECOND ELECTRODE (24) WHICH DIRECTLY CONTACTS WITH THE CONDUCTIVE LIQUID MATERIAL PORTION, IN WHICH THE DIELECTRIC LAYER IS AN ANODIZED PORTION (22) MADE OF A METAL OXIDE FORMED BY ANODIZING THE FIRST ELECTRODE.

公开(公告)号：DE60217690T2

公开(公告)日：2007-10-31

申请号：DE60217690

申请日：2002-08-29

Applicant: SONY CORP

Inventor： MAEDA FUMISADA ,  NAGASHIMA SHINICHI

IPC: G01B11/26 ,  G02B7/02 ,  G02B7/28 ,  G02B13/00 ,  G02B13/18 ,  G02B25/00 ,  G11B7/08 ,  G11B7/135 ,  G11B7/22

Abstract: An objective lens unit manufacturing apparatus for manufacturing an objective lens unit, with a numerical aperture not less than 0.7, made up by a plurality of lenses, includes a positioning mechanism (31) for positioning one lens (2) in a cylindrically-shaped lens holder (3) of a synthetic resin material, using another lens (1), already mounted and secured to the lens holder, as a reference, and for securing the one lens to the lens holder, for setting relative positions of the one and the other lenses.