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1. (WO2007010818) OPTICAL PICKUP DEVICE AND INFORMATION RECORDING/REPRODUCTION DEVICE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2007/010818 International Application No.: PCT/JP2006/313958
Publication Date: 25.01.2007 International Filing Date: 13.07.2006
IPC:
G11B 7/095 (2006.01) ,G11B 7/005 (2006.01)
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7
Recording 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
08
Disposition or mounting of heads or light sources relatively to record carriers
09
with 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
095
specially adapted for discs, e.g. for compensation of eccentricity or wobble
[IPC code unknown for G11B 7/05]
Applicants:
パイオニア株式会社 PIONEER CORPORATION [JP/JP]; 〒1538654 東京都目黒区目黒一丁目4番1号 Tokyo 4-1, Meguro 1-chome, Meguro-ku, Tokyo 1538654, JP (AllExceptUS)
棚橋祥夫 TANAHASHI, Yasuo [JP/JP]; JP (UsOnly)
柳澤琢麿 YANAGISAWA, Takuma [JP/JP]; JP (UsOnly)
Inventors:
棚橋祥夫 TANAHASHI, Yasuo; JP
柳澤琢麿 YANAGISAWA, Takuma; JP
Agent:
石川泰男 ISHIKAWA, Yasuo; 〒1050014 東京都港区芝二丁目17番11号 パーク芝ビル2階 Tokyo Park Shiba Building 2F 17-11, Shiba 2-chome Minato-ku, Tokyo 105-0014, JP
Priority Data:
2005-20910519.07.2005JP
Title (EN) OPTICAL PICKUP DEVICE AND INFORMATION RECORDING/REPRODUCTION DEVICE
(FR) DISPOSITIF DE CAPTAGE OPTIQUE ET DISPOSITIF D'ENREGISTREMENT/REPRODUCTION D'INFORMATIONS
(JA) 光ピックアップ装置及び情報記録再生装置
Abstract:
(EN) When performing tracking correction or CTC by using three beams, it is possible to realize a reliable and appropriate tracking correction or CTC even if the position of the sub beam irradiation to a track fluctuates. Five beams (main beam, sub beam in A, in B, and sub beam out A, out B) are generated. Reflected lights corresponding to the five beams are received to generate a differential push-pull signal DPPin corresponding to the sub beam in as plus and minus primary light and a differential push-pull signal DPPout corresponding to the sub beam out as plus and minus primary light. These differential push-pull signal DPPin and DPPout are weighted and a sum of them is used to generate a tracking error signal Ste having an amplitude value which can be subjected to tracking correction.
(FR) Lorsqu'une correction de l'alignement ou correction de température de couleur est effectuée en utilisant trois faisceaux, il est possible de réaliser une correction de l'alignement ou correction de température de couleur fiable et appropriée même si la position de l'irradiation d'un sous faisceau en direction d'une piste varie. Cinq faisceaux (faisceau principal, sous faisceau dans A, dans B, et sous faisceau depuis A, depuis B) sont générés. Des lumières réfléchies correspondant aux cinq faisceaux sont reçues afin de générer un signal symétrique différentiel DPPin correspondant au sous faisceau en entrée en tant que lumière primaire positive et négative et un signal symétrique différentiel DPPout correspondant au sous faisceau en sortie en tant que lumière primaire positive et négative. Ces signaux symétriques différentiels DPPin et DPPout sont pondérés et une somme de ces derniers est utilisée afin de générer un signal d'erreur d'alignement Ste ayant une valeur d'amplitude qui peut faire l'objet d'une correction de l'alignement.
(JA)  3ビームを用いてトラッキング補正やCTCを行う場合に、トラックに対するサブビームの照射位置に変動が生じた場合でも、確実且つ適切なトラッキング補正及びCTCを実現する。  5つのビーム(メインビーム、サブビームinA、inB及びサブビームoutA、outB)を生成する。この5つのビームに対応する反射光を受光して、±1次光であるサブビームinに対応した差動プッシュプル信号DPPinと、±2次光であるサブビームoutに対応した差動プッシュプル信号DPPoutを生成する。これらの差動プッシュプル信号DPPin及びDPPoutに対して、重み付けを行い、和を採ることにより、トラッキング補正可能な振幅値を有するトラッキングエラー信号Steを生成する。
front page image
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LV, LY, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, LV, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)
Also published as:
JPWO2007010818US20090103417JP4514792