Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2008-01-29
2008-01-29
Tran, Thang V. (Department: 2627)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
C369S112170, C369S112010
Reexamination Certificate
active
07324424
ABSTRACT:
A compatible optical pickup includes an optical disc, an objective lens, a diffractive device, and a divergent lens. The optical unit emits a short wavelength light beam corresponding to a high density optical disc and a long wavelength light beam corresponding to a low density optical disc. The objective lens forms a light spot on the high density optical disc and the low density optical disc and the diffractive device diffracts the short wavelength light beam to correct chromatism according to a change in a wavelength of the short wavelength light beam. The divergent lens refracts the long wavelength light beam toward the objective lens to increase a working distance with respect to the low density optical disc.
REFERENCES:
patent: 5815293 (1998-09-01), Komma et al.
patent: 5872761 (1999-02-01), Sugi et al.
patent: 6201780 (2001-03-01), Katayama
patent: 6430137 (2002-08-01), Saimi et al.
patent: 6449095 (2002-09-01), Ohtaki et al.
patent: 6643245 (2003-11-01), Yamamoto et al.
patent: 6650612 (2003-11-01), Matsuzaki et al.
patent: 6853614 (2005-02-01), Kim et al.
patent: 7057659 (2006-06-01), Mihara et al.
patent: 2004/0036972 (2004-02-01), Kimura et al.
patent: 1294383 (2001-05-01), None
patent: 1096483 (2001-05-01), None
patent: 1 154 417 (2001-11-01), None
patent: 10-214431 (1998-08-01), None
patent: 10-334504 (1998-12-01), None
patent: 2000-155974 (2000-06-01), None
patent: 2001-14714 (2001-01-01), None
patent: 2001-93179 (2001-04-01), None
patent: 2001176109 (2001-06-01), None
patent: 2001-209966 (2001-08-01), None
patent: 2001209966 (2001-08-01), None
patent: 2005122899 (2005-05-01), None
patent: WO 00/65583 (2000-11-01), None
patent: WO 01/48746 (2001-07-01), None
patent: WO 01/48746 (2001-07-01), None
Joseph E. Ford, Fang Xu and Yeshayahu Fainman, Jan. 1, 1996, Optics Letters, vol. 21, No. 1, pp. 80-82.
Search Report issued in European Patent Application No. 02257141.8 on Feb. 9, 2006.
Ahn Young-man
Chung Chong-sam
Kim Jong-Bae
Kim Tae-Kyung
Lee Jin-kyung
Haley Joseph
Samsung Electronics Co,. Ltd.
Stein, McEwen & Bui LLP
Tran Thang V.
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