Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2005-09-20
2005-09-20
Patel, Gautam R. (Department: 2655)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
C369S112080, C359S742000
Reexamination Certificate
active
06947368
ABSTRACT:
An optical scanning device for scanning a dual-layer optical record carrier with dual orthogonally polarized radiation beams. The device having a spherical aberration compensation optical subsystem including a switchable liquid crystal cell of birefringent material for altering different optical paths lengths provided by a phase structure of stepped annular zones.
REFERENCES:
patent: 5311494 (1994-05-01), Sugita et al.
patent: 5640406 (1997-06-01), Injeyan et al.
patent: 6580674 (2003-06-01), Nishiyama et al.
patent: 6636365 (2003-10-01), Saito et al.
patent: 6643244 (2003-11-01), Iwasaki
patent: 6687209 (2004-02-01), Ota et al.
patent: 6707607 (2004-03-01), Hendriks et al.
patent: 1126291 (2001-08-01), None
patent: 174614 (2001-06-01), None
patent: WO0124174 (2001-04-01), None
Lee et al., “HD/DVD Compatibility Using Polarization Phase Comparator (PPC) in Optical Disk”, Technical Digest of the International Symposium on Optical Memory, Oct. 2001, pp. 308-309, XP008020538.
De Vries Jorrit Ernst
Hendriks Bernardus Hendrikus Wilhelmus
Stallinga Sjoerd
Belk Michael E.
Koninklijke Philips Electronics , N.V.
Patel Gautam R.
LandOfFree
Duel-layer optical scanner with non-periodic phase structure... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Duel-layer optical scanner with non-periodic phase structure..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Duel-layer optical scanner with non-periodic phase structure... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3448685