Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2008-01-29
2008-01-29
Tran, Thang V. (Department: 2627)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
C369S112170, C369S112010
Reexamination Certificate
active
10295044
ABSTRACT:
A compatible optical pickup includes an optical disc, an objective lens, a diffractive device, and a divergent lens. The optical unit emits a short wavelength light beam corresponding to a high density optical disc and a long wavelength light beam corresponding to a low density optical disc. The objective lens forms a light spot on the high density optical disc and the low density optical disc and the diffractive device diffracts the short wavelength light beam to correct chromatism according to a change in a wavelength of the short wavelength light beam. The divergent lens refracts the long wavelength light beam toward the objective lens to increase a working distance with respect to the low density optical disc.
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Ahn Young-man
Chung Chong-sam
Kim Jong-bae
Kim Tae-kyung
Lee Jin-kyung
Haley Joseph
Samsung Electronics Co,. Ltd.
Stein, McEwen & Bui LLP
Tran Thang V.
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