Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2007-03-13
2007-03-13
Young, Wayne (Department: 2627)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
C369S112120, C369S112070, C369S112040
Reexamination Certificate
active
10791510
ABSTRACT:
An optical pickup device including a dual wavelength light source module for emitting a selected one of two light beams having different wavelengths, a dual grating for splitting, into three beams, the selected light beam emitted from the dual wavelength light source, and a hologram for focusing the three beams of the selected light beam onto a photodetector having typical 8-section patterns such that the three beams of the selected light beam are focused onto the same spots as those of the other light beam, respectively.
REFERENCES:
patent: 5029154 (1991-07-01), Sumi et al.
patent: 6130872 (2000-10-01), Sugiura et al.
patent: 2002/0027844 (2002-03-01), Furuhata et al.
patent: 2002/0097660 (2002-07-01), Komma et al.
patent: 2002/0196726 (2002-12-01), Takeda
patent: 2003/0179680 (2003-09-01), Park et al.
patent: 267233 (2000-07-01), None
Choi Woo-Seok
Kim Chun-Gi
Kim Eui-Joong
Kim Sung-Wook
Kwak No-Jun
Christensen O'Connor Johnson & Kindness PLLC
Nguyen Linh T.
Samsung Electro-Mechanics Co. Ltd.
Young Wayne
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