07742381 cites 12 patents.

The invention relates to an optical scanning device for scanning in a first mode a first information layer (111) of an information carrier and in a second mode a second information layer (112) of the information carrier. The optical scanning device comprises a radiation source (101) for generating a radiation beam (102), an objective system (105) for focusing an entrance beam on an information layer and an optical element (103) arranged between the radiation source and the objective system, for converting said radiation beam into a diverging entrance beam in the first mode and a converging entrance beam in the second mode.

Title
Optical scanning device
Application Number
10/569038
Publication Number
7742381 (B2)
Application Date
August 20, 2004
Publication Date
June 22, 2010
Inventor
Peter Coops
Eindhoven
NL
Pascal Jean Henri Bloemen
Eindhoven
NL
Joris Jan Vrehen
Eindhoven
NL
Bernardus Hendrikus Wilhelmus Hendriks
Eindhoven
NL
Assignee
Koninklijke Philips Electronics
NL
IPC
G11B 7/00
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