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1. WO2007148625 - LENTILLE DE COUPLAGE, TÊTE OPTIQUE ET DISPOSITIF DE DISQUE OPTIQUE

Numéro de publication WO/2007/148625
Date de publication 27.12.2007
N° de la demande internationale PCT/JP2007/062124
Date du dépôt international 15.06.2007
Demande présentée en vertu du Chapitre 2 18.04.2008
CIB
G11B 7/135 2012.01
GPHYSIQUE
11ENREGISTREMENT DE L'INFORMATION
BENREGISTREMENT DE L'INFORMATION BASÉ SUR UN MOUVEMENT RELATIF ENTRE LE SUPPORT D'ENREGISTREMENT ET LE TRANSDUCTEUR
7Enregistrement ou reproduction par des moyens optiques, p.ex. enregistrement utilisant un faisceau thermique de rayonnement optique, reproduction utilisant un faisceau optique à puissance réduite; Supports d'enregistrement correspondants
12Têtes, p.ex. formation du spot du faisceau lumineux ou modulation du faisceau lumineux
135Moyens pour guider le faisceau de la source au support d'enregistrement, ou du support d'enregistrement au détecteur
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 2007/13727
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
13727Compound lenses, i.e. two or more lenses co-operating to perform a function, e.g. compound objective lens including a solid immersion lens, positive and negative lenses either bonded together or with adjustable spacing
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 7/139
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
139Numerical aperture control means
G11B 7/13922
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
13922passive
Déposants
  • パナソニック株式会社 PANASONIC CORPORATION [JP/JP]; 5718501 大阪府門真市大字門真1006番地 Osaka 1006, Oaza Kadoma, Kadoma-shi, Osaka 5718501, JP (AllExceptUS)
  • 山崎 文朝 YAMASAKI, Fumitomo; null (UsOnly)
  • 水野 定夫 MIZUNO, Sadao; null (UsOnly)
  • 林 克彦 HAYASHI, Katsuhiko; null (UsOnly)
  • 愛甲 秀樹 AIKOH, Hideki; null (UsOnly)
Inventeurs
  • 山崎 文朝 YAMASAKI, Fumitomo; null
  • 水野 定夫 MIZUNO, Sadao; null
  • 林 克彦 HAYASHI, Katsuhiko; null
  • 愛甲 秀樹 AIKOH, Hideki; null
Mandataires
  • 奥田 誠司 OKUDA, Seiji; 〒5410041 大阪府大阪市中央区北浜一丁目8番16号 大阪証券取引所ビル10階 奥田国際特許事務所 Osaka OKUDA & ASSOCIATES, 10th Floor Osaka Securities Exchange Bldg. 8-16, Kitahama 1-chome Chuo-ku, Osaka-shi, Osaka 5410041, JP
Données relatives à la priorité
2006-17001320.06.2006JP
Langue de publication japonais (JA)
Langue de dépôt japonais (JA)
États désignés
Titre
(EN) COUPLING LENS, OPTICAL HEAD AND OPTICAL DISC DEVICE
(FR) LENTILLE DE COUPLAGE, TÊTE OPTIQUE ET DISPOSITIF DE DISQUE OPTIQUE
(JA) カップリングレンズ、光学ヘッドおよび光ディスク装置
Abrégé
(EN)
Provided is a coupling lens which compensates various types of aberrations including wavelength fluctuation, and provides excellent recording or reproducing characteristics, by being used in combination with an objective lens, for a plurality of types of optical discs such as a high density optical disc, DVD and CD, with excellent wavelength dispersion compensating characteristics. An optical head and an optical disc device (drive) are also provided. The coupling lens is incorporated into the optical head, which collects laser beams emitted from a plurality of light sources with different wavelengths on information recording surfaces of optical information recording media of different types. The coupling lens is provided with a first lens and a second lens, which are substantially adhered so that mutual optical axes accord, and is designed so that the laser beams having different wavelengths are refracted on the bonding surface. The coupling lens is afocal to the shortest wavelength among the different wavelength laser beams.
(FR)
L'invention concerne une lentille de couplage qui compense divers types d'aberrations, y compris la fluctuation de longueur d'onde, et procure d'excellentes caractéristiques d'enregistrement ou de reproduction, en étant utilisée en combinaison avec une lentille d'objectif, pour une pluralité de types de disques optiques comme un disque optique haute densité, un DVD et un CD, avec d'excellentes caractéristiques de compensation de dispersion des longueurs d'onde. L'invention concerne également une tête optique et un dispositif (lecteur) de disque optique. La lentille de couplage est incorporée dans la tête optique, qui collecte des faisceaux laser émis par une pluralité de sources lumineuses avec des longueurs d'onde différentes sur des surfaces d'enregistrement d'informations de supports d'enregistrement d'informations optiques de types différents. La lentille de couplage est pourvue d'une première lentille et d'une seconde lentille, qui sont sensiblement adhérées de sorte que des axes optiques mutuels concordent, et elle est conçue de sorte que les faisceaux laser ayant des longueurs d'onde différentes soient réfractés sur la surface de liaison. La lentille de couplage est afocale à la longueur d'onde la plus courte parmi les faisceaux laser à longueur d'onde différente.
(JA)
 良好な波長分散補償性能のもとで、高密度光ディスク、DVD、CD等の複数種類の光ディスクに対して、対物レンズと組み合わせて使用されることにより、波長の変動を含めた各種の収差を補償し、良好な記録または再生特性を得ることが可能なカップリングレンズ、光学ヘッド、および、光ディスク装置(ドライブ)を提供する。 カップリングレンズは、複数の光源から放射される異なる波長のレーザ光を、それぞれ異なる種類の光情報記録媒体の情報記録面に集光する光学ヘッドに組み込まれる。カップリングレンズは、互いの光軸が一致するように実質的に密着されるとともに、密着面において前記異なる波長のレーザ光がそれぞれ屈折するように設計された第1レンズおよび第2レンズを備え、前記異なる波長のレーザ光のうち、最も短い波長に対してアフォーカルである。
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