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Machine translation
1. (WO2006090653) OPTICAL PICKUP AND OBJECTIVE OPTICAL SYSTEM
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2006/090653    International Application No.:    PCT/JP2006/302891
Publication Date: 31.08.2006 International Filing Date: 17.02.2006
IPC:
G02B 13/00 (2006.01), G11B 7/135 (2012.01), G11B 7/125 (2012.01)
Applicants: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. [JP/JP]; 1006, Oaza Kadoma Kadoma-shi, Osaka 5718501 (JP) (For All Designated States Except US).
HAYASHI, Katsuhiko; (For US Only).
ARAI, Akihiro; (For US Only).
TANAKA, Yasuhiro; (For US Only).
YAMAGATA, Michihiro; (For US Only)
Inventors: HAYASHI, Katsuhiko; .
ARAI, Akihiro; .
TANAKA, Yasuhiro; .
YAMAGATA, Michihiro;
Agent: MAEDA, Hiroshi; Osaka-Marubeni Bldg. 5-7, Hommachi 2-chome Chuo-ku, Osaka-shi Osaka 5410053 (JP)
Priority Data:
2005-051453 25.02.2005 JP
Title (EN) OPTICAL PICKUP AND OBJECTIVE OPTICAL SYSTEM
(FR) TETE DE LECTURE OPTIQUE ET SYSTEME OPTIQUE OBJECTIF
(JA) 光ピックアップ装置、それに用いる対物光学系
Abstract: front page image
(EN)An optical pickup (1) comprises a multiple wavelength light source (6), and an objective optical system (2). The objective optical system (2) includes at least two wave front conversion surfaces (13a, 16a), and an objective lens (10). The at least two wave front conversion surfaces (13a, 16a) convert the wave front of incident laser light into wave fronts different from each other depending on the kind of an optical information recording medium (3) before the laser light exits. The objective lens (10) focuses the laser light exiting the wave front conversion surface (16a) at an optical information recording surface (3R). In the optical pickup (1), following condition is satisfied for all wavelengths of corresponding laser light. ‖SCMAX‖<0.036 where, SCMAX is a maximum sine condition dissatisfaction amount of the objective optical system (2).
(FR)L’invention concerne une tête de lecture optique (1) comprenant une source de lumière à longueurs d’onde multiples (6) et un système optique objectif (2). Le système optique objectif (2) comporte au moins deux surfaces de conversion de front d’onde (13a, 16a) et une lentille objective (10). Lesdites au moins deux surfaces de conversion de front d’onde (13a, 16a) convertissent le front d’onde de la lumière laser incidente en fronts d’onde différents selon le type de support d’enregistrement optique d’informations (3) avant la sortie de la lumière laser. La lentille objective (10) concentre la lumière laser sortant de la surface de conversion de front d’onde (16a) au niveau d’une surface d’enregistrement optique d’informations (3R). Dans la tête de lecture optique (1), toutes les longueurs d’onde de la lumière laser correspondante obéissent à la relation ‖SCMAX‖ < 0,036 dans laquelle SCMAX est une quantité d’écart maximal par rapport à la fonction sinus du système optique objectif (2).
(JA) 光ピックアップ装置(1)は、複数波長光源(6)と、対物光学系(2)とを備えている。対物光学系(2)は、少なくとも2面の波面変換面(13a)、(16a)と、対物レンズ(10)とを含む。少なくとも2面の波面変換面(13a)、(16a)は、入射したレーザ光の波面をそれぞれ光情報記録媒体(3)の種類に応じた相互に異なる波面にして出射する。対物レンズ(10)は、波面変換面(16a)から出射したレーザ光を光情報記録面(3R)に合焦させる。光ピックアップ装置(1)は、対応するレーザ光の波長すべてに対して、以下の条件を満足する。   |SCMAX| < 0.036  ここで、 SCMAX:対物光学系(2)の正弦条件不満足量の最大値である。
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, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, 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, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, 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, 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)