Optical head and optical disk drive unit therewith

Details Optical head and optical disk drive unit therewith Optical head and optical disk drive unit therewith

2007-04-24

2007-04-24

Hindi, Nabil (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S112010

Reexamination Certificate

active

10853181

ABSTRACT:
An optical head is provided which is capable of making an optical disk drive unit thinner. The optical head includes: a laser diode which emits light toward an optical disk; a photodiode which is disposed in the same housing as the laser diode; a light-turning mirror which reflects and deflects the light emitted from the laser diode; a light-raising mirror which reflects and deflects the light reflected by the light-turning mirror in the direction of the optical disk; an objective lens that converges the light reflected by the light-raising mirror onto the optical disk; and a hologram element which allows the light reflected by the optical disk to branch off and reach the photodiode, in which at least a part of the light-turning mirror is disposed inside of the window portion of a cartridge which houses the optical disk.

REFERENCES:
patent: 5727111 (1998-03-01), Kume et al.
patent: 6463019 (2002-10-01), Kawano et al.
patent: 2003/0048737 (2003-03-01), Nakamura et al.
patent: 10-143934 (1998-05-01), None

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