Information recording and reproducing apparatus

Details Information recording and reproducing apparatus Information recording and reproducing apparatus

2005-01-04

2005-01-04

Huber, Paul W. (Department: 2653)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S094000, C369S112230

Reexamination Certificate

active

06839313

ABSTRACT:
An information recording and reproducing apparatus for optically recording/reproducing information to/from a two-layer optical disk comprises a cylindrical lens, which gives astigmatism to a reflected light from a target information recording layer, two caustic curve positions are arranged in the front and in the rear of the optical detector, and an unnecessary reflected light from an another information recording layer has two caustic curve positions arranged in the rear of the optical detector. In this condition, assuming an astigmatism direction of the cylindrical lens is inclined at 45 degree angle to a track direction, a projected image of the target information recording layer is inclined at 90 degree angle to an another projected image of the another information recording layer in a light receiving surface of the optical detector.

REFERENCES:
patent: 5764606 (1998-06-01), Fukumoto et al.
patent: 5768251 (1998-06-01), Ito et al.
patent: 0 749 116 (1996-12-01), None
patent: 11-242824 (1999-09-01), None

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3429720