Multi-layer optical recording medium and method of...

Details Multi-layer optical recording medium and method of... Multi-layer optical recording medium and method of...

2006-02-28

2006-02-28

Neyzari, Ali (Department: 2655)

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

C369S275400, C369S283000, C428S064400

Reexamination Certificate

active

07006427

ABSTRACT:
Preformatted areas in at least the most distal recording layer from an object lens among a plurality of recording layers in an optical disc include guard areas at both ends of the respective recording layer in the tracing direction. No data is recorded on the guard areas. The guard area length GL is determined to satisfy the following formula:in-line-formulae description="In-line Formulae" end="lead"?GL≧YL+T×(NA
)/[1−(NA
)2]1/2in-line-formulae description="In-line Formulae" end="tail"?where YL is a maximum allowable value of position deviation between the preformatted areas in the most distal recording layer and in another recording layer in the tracing direction; NA is the numerical aperture of the object lens; T is a distance between the most distal and the another recording layer; and “n” is an refraction index of a medium between the most distal and the another recording layers.

REFERENCES:
patent: 4644520 (1987-02-01), Lange
patent: 4795511 (1989-01-01), Wouters et al.
patent: 5972250 (1999-10-01), Miyamoto et al.
patent: 6532208 (2003-03-01), Nakajima
patent: 10-172241 (1998-06-01), None

Affiliated with

Also associated with

Rating

Multi-layer optical recording medium and method of... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multi-layer optical recording medium and method of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-layer optical recording medium and method of... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3673316