Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2007-08-21
2007-08-21
Young, Wayne (Department: 2627)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
C369S112230
Reexamination Certificate
active
10635649
ABSTRACT:
An optical pickup records data in or reproduces data from optical recording media respectively having recording faces at different heights, and includes a semiconductor laser diode array having light emitting portions for respectively emitting laser beams of different wavelengths. A finite conjugate type object lens used in this optical pickup is designed so that the numerical aperture of the object lens can be controlled to be changed in accordance with switching between the different wavelengths for allowing a laser beam to be focused on each optical recording medium.
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Foreign Office Action, and English translation thereof, dated Feb. 27, 2007 for JP Patent Application No. 2002-229585.
Hatade Koei
Onozawa Kazutoshi
Matsushita Electric - Industrial Co., Ltd.
McDermott Will & Emery LLP
Nalux Co., Ltd.
Pham Van T.
Young Wayne
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