Dynamic optical information storage or retrieval – Dynamic mechanism optical subsystem – Protecting optical transducer
Reexamination Certificate
2006-12-22
2009-12-29
Feild, Joseph H (Department: 2627)
Dynamic optical information storage or retrieval
Dynamic mechanism optical subsystem
Protecting optical transducer
C369S044110, C369S112240, C720S669000, C720S672000
Reexamination Certificate
active
07640559
ABSTRACT:
An objective lens actuator is provided which includes two objective lenses mounted on a movable body, and which is capable of preventing the movable body from coming into contact or collision with a disk and whose thickness becomes thinner. When a light beam is concentrated and focused on a high-density optical disk, D1represents the distance between the disk surface and the part of the movable body in the closest position to the disk; when a light beam is concentrated and focused on a CD, D2represents the distance between the disk surface and the part of the movable body in the closest position to the disk; when a light beam is concentrated and focused on a DVD, D3represents the distance between the disk surface and the part of the movable body in the closest position to the disk; and the following relational expression (1) is satisfied,in-line-formulae description="In-line Formulae" end="lead"?D1<D2<D3 (1).in-line-formulae description="In-line Formulae" end="tail"?
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Written Opinion of the International Searching Authority issuedFeb. 5, 2008in the International (PCT) Application No. PCT/JP2006/325636.
Komma Yoshiaki
Matsuzaki Keiichi
Sano Kousei
Tanaka Toshiyasu
Wada Hidenori
Feild Joseph H
Goma Tawfik
Panasonic Corporation
Wenderoth , Lind & Ponack, L.L.P.
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