Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2005-09-06
2005-09-06
Psitos, Aristotelis M. (Department: 2653)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
C369S044150, C369S135000
Reexamination Certificate
active
06940802
ABSTRACT:
An optical scanning device scans an information track which is present on an information carrier. The scanning device includes a radiation source, a lens system with an optical axis for focusing a radiation beam supplied by the radiation source into a scanning spot on the information carrier, and a focusing actuator for displacing the lens system relatively to a basic part of the scanning device in a direction parallel to the optical axis. The actuator includes an electric coil which is arranged around the lens system and provided with a passage for a radiation beam path which extends in a direction perpendicular to the optical axis. The electric coil is provided around the lens system by means of a winding process, the passage being provided in the coil by bending the parts of the coil wires which are present near the radiation beam path, in a direction substantially parallel to the optical axis. In a preferred embodiment, said parts of the coil wires are bent during the winding process by means of a mandrel which is present in the passage during the winding process. In this manner, the optical scanning device according to the invention can be manufactured in a simple manner by means of a reduced number of process steps. The optical scanning device can be used in an optical disc player.
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Haus Thomas A. J.
Stinesen Bernardus J.
Van Eijndhoven Pierre
Belk Michael E.
Koninklijke Philips Electronics , N.V.
Psitos Aristotelis M.
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