Optical heads device and control method of optical head

Details Optical heads device and control method of optical head Optical heads device and control method of optical head

2008-04-29

2008-04-29

Hindi, Nabil (Department: 2627)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C369S053400, C369S094000

Reexamination Certificate

active

07366072

ABSTRACT:
In an optical head for performing the reproduction or recording of information for two or more types of different optical disks, the damage caused to an optical disk or an objective lens by collision between the optical disk and the objective lens is avoided. An optical heads device for reproducing or recording two or more types of information recording mediums different from each other comprises a first optical system, a second optical system, and a control unit for avoiding the collision between an optical disk and a second objective lens when a first optical system is in operation.

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European Search Report for Application No. EP 04 02 9174, dated Nov. 17, 2006.

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