Processing

Please wait...

Settings

Settings

Goto Application

1. WO2007086332 - OPTICAL PICKUP DEVICE

Publication Number WO/2007/086332
Publication Date 02.08.2007
International Application No. PCT/JP2007/050877
International Filing Date 22.01.2007
IPC
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
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
CPC
G11B 7/1275
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
127Lasers; Multiple laser arrays
1275Two or more lasers having different wavelengths
G11B 7/1374
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
1374Objective lenses
G11B 7/1376
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
1376Collimator lenses
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
G11B 7/1392
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
1392Means for controlling the beam wavefront, e.g. for correction of aberration
Applicants
  • パイオニア株式会社 PIONEER CORPORATION [JP]/[JP] (AllExceptUS)
  • 小山 雅之 KOYAMA, Masayuki [JP]/[JP] (UsOnly)
Inventors
  • 小山 雅之 KOYAMA, Masayuki
Agents
  • 菊地 保宏 KIKUCHI, Yasuhiro
Priority Data
2006-01474524.01.2006JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) OPTICAL PICKUP DEVICE
(FR) DISPOSITIF DE LECTURE OPTIQUE
(JA) 光ピックアップ装置
Abstract
(EN)
An optical pickup device (1) is provided with a semiconductor laser element (2), i.e., a light emitting means, which emits two types of laser beams having different wavelengths; a coupling lens (3) for converting the divergence angle of the emitted laser beams and suppressing divergence of the laser beams; an aberration correcting element (4) for correcting astigmatism generated due to passing of a second laser beam emitted from a second light emitting point (22) arranged outside the optical axis of the coupling lens (3); a collimator lens (5) for converting the laser beam passed through the coupling lens (3) and the aberration correcting element (4) into parallel beams; and an objective lens (6) for colleting the parallel beams on the information recording plane of a disc (7).
(FR)
L’invention concerne un dispositif de lecture optique (1) comportant un élément laser à semiconducteur (2), à savoir un moyen émetteur de lumière, qui émet deux types de faisceaux laser de longueurs d’onde différentes ; une lentille de couplage (3) servant à convertir l’angle de divergence des faisceaux laser émis et à supprimer la divergence des faisceaux laser ; un élément correcteur d’aberration (4) servant à corriger l’astigmatisme dû au passage d’un deuxième faisceau laser émis par un deuxième moyen émetteur de lumière (22) placé hors de l’axe optique de la lentille de couplage (3) ; une lentille de collimation (5) servant à convertir le faisceau laser qui a traversé la lentille de couplage (3) et l’élément correcteur d’aberration (4) en faisceaux parallèles ; et une lentille objective (6) servant à collecter les faisceaux parallèles sur le plan d’enregistrement d’informations d’un disque (7).
(JA)
光ピックアップ装置1は、発光手段である波長の異なる2つのレーザ光を出射する半導体レーザ素子2と、出射されたレーザ光の発散角を変換して、レーザ光の発散を抑えるカップリングレンズ3と、カップリングレンズ3の光軸外に配置された第2発光点22から出射された第2レーザ光が、カップリングレンズ3を通過することにより発生する非点収差を補正する収差補正素子4と、カップリングレンズ3及び収差補正素子4を通過したレーザ光を平行光に変換するコリメータレンズ5と、平行光をディスク7の情報記録面上に集光させる対物レンズ6と、を備える。
Latest bibliographic data on file with the International Bureau