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1. WO2006126357 - OPTICAL PICKUP DEVICE AND OPTICAL DISC DEVICE

Publication Number WO/2006/126357
Publication Date 30.11.2006
International Application No. PCT/JP2006/308519
International Filing Date 24.04.2006
IPC
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
G11B 7/13 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
13Optical detectors therefor
CPC
G11B 2007/0006
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
0003Recording, reproducing or erasing systems characterised by the structure or type of the carrier
0006adapted for scanning different types of carrier, e.g. CD & DVD
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 7/13
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
13Optical detectors therefor
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
Applicants
  • 三菱電機株式会社 Mitsubishi Denki Kabushiki Kaisha [JP]/[JP] (AllExceptUS)
  • 松原 大介 MATSUBARA, Daisuke [JP]/[JP] (UsOnly)
  • 篠田 昌久 SHINODA, Masahisa [JP]/[JP] (UsOnly)
Inventors
  • 松原 大介 MATSUBARA, Daisuke
  • 篠田 昌久 SHINODA, Masahisa
Agents
  • 前田 実 MAEDA, Minoru
Priority Data
2005-15410326.05.2005JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) OPTICAL PICKUP DEVICE AND OPTICAL DISC DEVICE
(FR) DISPOSITIF DE CAPTAGE OPTIQUE ET DISPOSITIF A DISQUE OPTIQUE
(JA) 光ピックアップ装置及び光ディスク装置
Abstract
(EN)
A laser emitter (9) is provided with a light emitting section (4) which emits light having a wavelength of &lgr;1 (approximately 405nm); a light emitting section (5) which emits light having a wavelength of &lgr;2 (approximately 650nm); and a light emitting section (6) which emits light having a wavelength of &lgr;3 (approximately 780nm). A light emitting position of the light emitting section (4) and a light emitting position of the light emitting section (6) are formed substantially at the same positions when viewed from an optical axis direction of the light emitted from the laser emitter (9). An optical axis adjusting element (18) is arranged for adjusting an optical axis of a returning light having at least one of the wavelengths (&lgr;1, &lgr;2, &lgr;3) among returning lights having such wavelengths so that each returning light emitted from the light emitting sections (4, 5, 6) of the laser emitter (9) and reflected by an optical recording medium (16) is received by a common light detector (20).
(FR)
L’invention concerne un émetteur laser (9) muni d’une section d’émission lumineuse (4) qui émet une lumière ayant une longueur d’onde de &lgr;1 (approximativement 405 nm) ; une section d’émission lumineuse (5) qui émet une lumière ayant une longueur d’onde de &lgr;2 (approximativement 650 nm) ; et une section d’émission lumineuse (6) qui émet une lumière ayant une longueur d’onde de &lgr;3 (approximativement 780 nm). Une position d’émission lumineuse de la section d’émission lumineuse (4) et une position d’émission lumineuse de la section d’émission lumineuse (6) sont formées pratiquement au même emplacement lorsqu’on les voit dans le sens de l'axe optique de la lumière émise à partir de l'émetteur laser (9). Un élément de réglage de l’axe optique (18) est prévu pour ajuster l’axe optique d’une lumière de retour ayant au moins une des longueurs d’onde (&lgr;1, &lgr;2, &lgr;3) parmi des lumières de retour ayant de telles longueurs d’onde, de manière à ce que chaque lumière de retour émise à partir des sections d'émission lumineuse (4, 5, 6) de l’émetteur laser (9) et réfléchie par un support d’enregistrement optique (16) soit reçue par un photodétecteur commun (20).
(JA)
 レーザ出力器(9)は、波長λ1(約405nm)の光を出射する発光部(4)と、波長λ2(約650nm)の光を出射する発光部(5)と、波長λ3(約780nm)の光を出射する発光部(6)とを有する。発光部(4)における光の出射位置と、発光部(6)における光の出射位置とは、レーザ出力器(9)の出射光の光軸方向から見て略同一位置に形成されている。レーザ出力器(9)の発光部(4,5,6)から出射されて光記録媒体(16)で反射された各戻り光が、共通の光検出器(20)で受光されるように、波長(λ1,λ2,λ3)の戻り光のうち少なくとも1つの波長の戻り光の光軸を調整する光軸調整素子(18)が備えられている。
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