Optical head device and information processing apparatus

Details Optical head device and information processing apparatus Optical head device and information processing apparatus

2003-09-03

2008-03-04

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

Reexamination Certificate

active

07339877

ABSTRACT:
In an optical head device, a light emission source for emitting a plurality of laser beams with different wavelengths and an optical system including an objective lens and a collimator are provided. With respect to the optical system to be used in common for a plurality of optical recording media of different kinds, the RIM intensity is set to be not less than 0.1 and the magnification is set in the range of 4 to 6. With these conditions applied to the RIM intensity and the magnification of the optical system, light utilization efficiency at the time of CD recording is ensured, while preventing this from adversely affecting DVD reproduction or recording and while ensuring a beam spot quality.

REFERENCES:
patent: 4912311 (1990-03-01), Hasegawa et al.
patent: 5289313 (1994-02-01), Matsuoka
patent: 5586097 (1996-12-01), Nishikawa
patent: 5602383 (1997-02-01), Takekoshi et al.
patent: 5724335 (1998-03-01), Kobayashi
patent: 5734637 (1998-03-01), Ootaki et al.
patent: 6154434 (2000-11-01), Shibano et al.
patent: 6366542 (2002-04-01), Kojima et al.
patent: 6635905 (2003-10-01), Nido et al.
patent: 6782619 (2004-08-01), Corbett et al.
patent: 6898168 (2005-05-01), Kimura et al.
patent: 2004/0120243 (2004-06-01), Aiki et al.
patent: 2004/0157083 (2004-08-01), Takahashi et al.
patent: 2005/0098801 (2005-05-01), Ikeda et al.
patent: 2007/0190677 (2007-08-01), Okuyama et al.
U.S. Appl. No. 11/230,473, filed Sep. 21, 2005, Aiki.

Affiliated with

Also associated with

Rating

Optical head device and information processing apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical head device and information processing apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical head device and information processing apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3975159