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1. WO2006093305 - OPTICAL PICKUP DEVICE

Publication Number WO/2006/093305
Publication Date 08.09.2006
International Application No. PCT/JP2006/304192
International Filing Date 28.02.2006
IPC
G11B 7/0065 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
004Recording, reproducing or erasing methods; Read, write or erase circuits therefor
0065Recording, reproducing or erasing by using optical interference patterns, e.g. holograms
G11B 7/09 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
08Disposition or mounting of heads or light sources relatively to record carriers
09with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
G11B 7/125 2012.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
12Heads, e.g. forming of the optical beam spot or modulation of the optical beam
125Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
G11B 7/135 2012.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
12Heads, e.g. forming of the optical beam spot or modulation of the optical beam
135Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
CPC
G11B 7/0065
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation ; by modifying optical properties or the physical structure; , reproducing using an optical beam at lower power ; by sensing optical properties; Record carriers therefor;
004Recording, reproducing or erasing methods; Read, write or erase circuits therefor
0065Recording, reproducing or erasing by using optical interference patterns, e.g. holograms
G11B 7/083
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation ; by modifying optical properties or the physical structure; , reproducing using an optical beam at lower power ; by sensing optical properties; Record carriers therefor;
08Disposition or mounting of heads or light sources relatively to record carriers
083relative to record carriers storing information in the form of optical interference patterns, e.g. holograms
G11B 7/128
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation ; by modifying optical properties or the physical structure; , reproducing using an optical beam at lower power ; by sensing optical properties; Record carriers therefor;
12Heads, e.g. forming of the optical beam spot or modulation of the optical beam
125Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
128Modulators
G11B 7/1353
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation ; by modifying optical properties or the physical structure; , reproducing using an optical beam at lower power ; by sensing optical properties; Record carriers therefor;
12Heads, e.g. forming of the optical beam spot or modulation of the optical beam
135Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
1353Diffractive elements, e.g. holograms or gratings
G11B 7/1362
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation ; by modifying optical properties or the physical structure; , reproducing using an optical beam at lower power ; by sensing optical properties; Record carriers therefor;
12Heads, e.g. forming of the optical beam spot or modulation of the optical beam
135Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
1362Mirrors
G11B 7/1378
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation ; by modifying optical properties or the physical structure; , reproducing using an optical beam at lower power ; by sensing optical properties; Record carriers therefor;
12Heads, e.g. forming of the optical beam spot or modulation of the optical beam
135Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
1372Lenses
1378Separate aberration correction lenses; Cylindrical lenses to generate astigmatism; Beam expanders
Applicants
  • パイオニア株式会社 PIONEER CORPORATION [JP]/[JP] (AllExceptUS)
  • 佐藤 充 SATO, Makoto [JP]/[JP] (UsOnly)
  • 小笠原 昌和 OGASAWARA, Masakazu [JP]/[JP] (UsOnly)
Inventors
  • 佐藤 充 SATO, Makoto
  • 小笠原 昌和 OGASAWARA, Masakazu
Agents
  • 藤村 元彦 FUJIMURA, Motohiko
Priority Data
2005-05599901.03.2005JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) OPTICAL PICKUP DEVICE
(FR) DISPOSITIF DE RECUEIL OPTIQUE
(JA) 光ピックアップ装置
Abstract
(EN)
An optical pickup device which can stably perform recording or reproduction on/from a recording medium. The optical pickup device is provided with an irradiation optical system for collecting optical beams by an objective lens. The optical pickup device is provided with a reflecting section which is arranged to face the irradiation optical system at an interval on a common optical axis for returning the optical beams by reflecting the optical beams toward the irradiation optical system; a phase plate, which is arranged on the optical axis, and separates and generates from the optical beams a beam on the optical axis and a beam whose polarization state is entirely or partially changed at the periphery of the beams on the optical axis; a detection optical system, which is arranged on the optical axis, extracts a beam whose polarization state is changed from among returning beams of the optical beams, and guides the extracted beam to a photodetector; and a reflecting section driving section for positioning the reflecting section based on a photoelectric conversion output from the photodetector.
(FR)
La présente invention concerne un dispositif de recueil optique capable de réaliser, de manière stable, un enregistrement ou une reproduction sur un support d'enregistrement ou à partir de celui-ci. Le dispositif de recueil optique est doté d'un système optique d'irradiation destiné à collecter les faisceaux optiques à l'aide d'une lentille d'objectif. Le dispositif de recueil optique est doté d'une section de réflexion, placée de manière à faire face au système optique d'irradiation à un intervalle sur un axe optique commun destiné à renvoyer les faisceaux optiques en réfléchissant les faisceaux optiques vers le système optique d'irradiation, une plaque de phase, placée sur l'axe optique et qui, à partir des faisceaux optiques, divise et génère un faisceau sur l'axe optique ainsi qu'un faisceau dont l'état de polarisation est modifié en tout ou partie à la périphérie des faisceaux de l'axe optique. Il dispose également d'un système optique de détection, placé sur l'axe optique, qui extrait un faisceau dont l'état de polarisation est modifié parmi les faisceaux renvoyés des faisceaux optiques et guide le faisceau extrait vers un photodétecteur, ainsi que d'une section de commande de la section réfléchissante permettant de placer la section réfléchissante en fonction d'une sortie de conversion photoélectrique provenant du photodétecteur.
(JA)
安定的に記録媒体の記録又は再生を行うことが可能となるように構成された光ピックアップ装置。 光ピックアップ装置は、対物レンズによって光ビームを集光する照射光学系を有する光ピックアップ装置であって、照射光学系に対向して共通の光軸上にて離間配置されかつ光ビームを照射光学系へ向けて反射して戻す反射部と、光軸上に配置されかつ、光ビームから、光軸上の光と、光軸上の光の周囲の全て又は一部に偏光状態が変化した光とを、分離して生成する位相板と、光軸に配置されかつ光ビームの戻り光のうち偏光状態が変化した光を抽出して光検出器へ導く検出光学系と、光検出器からの光電変換出力に基づいて反射部を位置決めする反射部駆動部とを備える。
Also published as
EP6715251
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