Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2004-08-20
2010-06-22
Edun, Muhammad N. (Department: 2627)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
C369S112230, C369S044230, C369S044250
Reexamination Certificate
active
07742381
ABSTRACT:
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.
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M. Born, et al: Principles of Optics, 6th edition, 1993, pp. 166-169.
ISR Publication, International Publication No. WO2005/020219A3.
Bloemen Pascal Jean Henri
Coops Peter
Hendriks Bernardus Hendrikus Wilhelmus
Vrehen Joris Jan
Edun Muhammad N.
Koninklijke Philips Electronics , N.V.
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