Optical pickup device and recording/reproducing device

Details Optical pickup device and recording/reproducing device Optical pickup device and recording/reproducing device

2006-09-12

2006-09-12

Wellington, Andrea (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S112170

Reexamination Certificate

active

07106683

ABSTRACT:
An optical pickup device includes an objective lens (2), with a numerical aperture (NA) being not less than 1, having a solid immersion lens (1) which is made up by a spherical portion (1a) and a flat portion (1b) parallel to a surface (101a) of an optical disc (101). The component of the reflected light from the optical disc in the polarized state perpendicular to the polarized state of the reflected light which prevails when the distance between the surface of the optical disc and the flat portion of the solid immersion lens is zero is detected. The so detected light intensity is associated with the distance between the optical disc surface and the solid immersion lens to accurately detect the minute gap between the optical disc and the solid immersion lens.

REFERENCES:
patent: 6717896 (2004-04-01), Imanishi
patent: 6791913 (2004-09-01), Ishimoto
patent: 6845066 (2005-01-01), Shingo
patent: 2001/0053117 (2001-12-01), Ichimura et al.
patent: 2003/0058777 (2003-03-01), Martynov et al.
patent: 11-250484 (1999-09-01), None
patent: 2000-200434 (2000-07-01), None
U.S. Appl. No. 10/415,103, filed Apr. 30, 2003, Saito et al.
U.S. Appl. No. 10/714,866, filed Nov. 18, 2003, Saito et al.

Affiliated with

Also associated with

Rating

Optical pickup device and recording/reproducing device 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 pickup device and recording/reproducing device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical pickup device and recording/reproducing device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3615182