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1. (WO2009060577) OPTICAL REPRODUCING METHOD AND OPTICAL REPRODCUING SYSTEM
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2009/060577    International Application No.:    PCT/JP2008/003130
Publication Date: 14.05.2009 International Filing Date: 31.10.2008
IPC:
G11B 7/005 (2006.01), G11B 7/125 (2006.01)
Applicants: TDK CORPORATION [JP/JP]; 1-13-1 Nihonbashi, Chuou-ku, Tokyo 1038272 (JP) (For All Designated States Except US).
KIKUKAWA, Takashi [JP/JP]; (JP) (For US Only).
KATO, Tatsuya [JP/JP]; (JP) (For US Only)
Inventors: KIKUKAWA, Takashi; (JP).
KATO, Tatsuya; (JP)
Agent: SAHARA, Masashi; SIGHT PATENT 794, Suzuya 2-chome, Chuou-ku Saitama-shi, Saitama 3380013 (JP)
Priority Data:
2007-292262 09.11.2007 JP
Title (EN) OPTICAL REPRODUCING METHOD AND OPTICAL REPRODCUING SYSTEM
(FR) PROCÉDÉ DE REPRODUCTION OPTIQUE ET SYSTÈME DE REPRODUCTION OPTIQUE
(JA) 光再生方法、光再生システム
Abstract: front page image
(EN)Provided is an optical reproducing method for reproducing information by irradiating an optical recording medium with a reproducing laser beam having a wavelength (λ) of 400-410nm. When the reflectance of the information recording layer in the optical recording medium becomes 4% or below, the average value (Pra) of the reproduction laser beam applied on the information recording layer is permitted to be larger than 1.2mW. Thus, variance of reproduction qualities of the low-reflectance optical recording medium is suppressed.
(FR)L'invention porte sur un procédé de reproduction optique pour reproduire des informations par irradiation d'un support d'enregistrement optique par un faisceau laser de reproduction ayant une longueur d'onde (λ) de 400-410 nm. Lorsque la réflectance de la couche d'enregistrement d'informations dans le support d'enregistrement optique atteint au plus 4 %, la valeur moyenne (Pra) du faisceau laser de reproduction appliqué sur la couche d'enregistrement d'informations est autorisée à dépasser 1,2 mW. Ainsi, une variance de qualités de reproduction du support d'enregistrement optique à faible réflectance est supprimée.
(JA) 光記録媒体に対して、波長λが400~410nmの再生レーザー光を照射して情報を再生する光再生方法であって、光記録媒体における情報記録層の反射率が4%以下となる際に、この情報記録層に照射する再生レーザー光の再生パワー平均値Praを1.2mWより大きくするようにした。これにより、低反射率の光記録媒体の再生品質のばらつきを抑制することが可能となる。
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Organization (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, HR, HU, IE, IS, IT, LT, LU, LV, MC, MT, NL, NO, 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)