Optical pickup device and optical disk device having a...

Details Optical pickup device and optical disk device having a... Optical pickup device and optical disk device having a...

2005-11-29

2008-10-28

Klimowicz, William J. (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S044110

Reexamination Certificate

active

07443780

ABSTRACT:
An optical pickup device is adapted to read information signals from optical recording media of two different types such as a “DVD” and a “CD” for which two light beams with different wavelengths are used and comprises a photodetector having a single light receiving section that can be shared by optical recording media of two different types. Both the light beam reflected from the signal recording surface of the “DVD”106aand the light beam reflected from the signal recording surface of the “CD”106bare diffracted by the diffraction element6and focused to a same spot on the light receiving surface of the photodiode of a photodetector7.

REFERENCES:
patent: 4309110 (1982-01-01), Tumerman
patent: 5243583 (1993-09-01), Ohuchida et al.
patent: 5253237 (1993-10-01), Miyake et al.
patent: 5497227 (1996-03-01), Takeuchi et al.
patent: 5541909 (1996-07-01), Nakajima et al.
patent: 5555334 (1996-09-01), Ohnishi et al.
patent: 5589982 (1996-12-01), Faklis et al.
patent: 5956302 (1999-09-01), Maeda et al.
patent: 5959704 (1999-09-01), Suzuki et al.
patent: 6067197 (2000-05-01), Blasiak et al.
patent: 6072624 (2000-06-01), Dixon et al.
patent: 6262845 (2001-07-01), Sweatt
patent: 6400664 (2002-06-01), Shimano et al.
patent: 6407815 (2002-06-01), Akihiro
patent: 6510119 (2003-01-01), Takeshita et al.
patent: 6512608 (2003-01-01), Ohyama
patent: 6584060 (2003-06-01), Oohchida et al.
patent: 6596982 (2003-07-01), Skokan et al.
patent: 6646975 (2003-11-01), Uchizaki et al.
patent: 6829091 (2004-12-01), Kato et al.
patent: 6980504 (2005-12-01), Yukawa

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