Optical disc drive

Details Optical disc drive Optical disc drive

2006-08-02

2009-06-09

Young, Wayne R (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S121000

Reexamination Certificate

active

07545726

ABSTRACT:
An optical disc drive includes a light source and an objective optical system for condensing a light from the light source onto a recording surface of an optical disc. A chassis which is movable radially of the optical disc supports both the light source and the objective optical system. The light source includes a red/infrared unit having a red/infrared LD and a blue LD. The red/infrared LD generates both a red beam and an infrared beam. The blue LD generates a blue beam. The objective optical system includes a first and a second object lenses whose focal distances are different. The first and the second object lenses are disposed on a circumferential line of the optical disc.

REFERENCES:
patent: 6314064 (2001-11-01), Ueda et al.
patent: 7301864 (2007-11-01), Horinouchi et al.
patent: 2004/0114495 (2004-06-01), Kim et al.
patent: 2005/0249097 (2005-11-01), Hashimura et al.
patent: 2006/0077809 (2006-04-01), Makita et al.
patent: 2004-134056 (2004-04-01), None

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