Device for optically scanning a record carrier

Details Device for optically scanning a record carrier Device for optically scanning a record carrier

1998-08-20

2000-11-21

Epps, Georgia

Optical: systems and elements

Lens

With support

359822, 369 58, G02B 702, G11B 390

Patent

active

061511749

ABSTRACT:
A scanning device for an optical record carrier (1) comprises a high-numerical aperture dual lens objective system (10, 11) for focussing a radiation beam (7) on an information layer (3) of the record carrier. The lens (11) of the objective system closest to the record carrier is tilted by a tilt servo system in response to tilt of the record carrier. The tilt angle of the lens is preferably less than the tilt angle of the record carrier in order to reduce optical aberrations of the radiation beam such as coma and astigmatism.

REFERENCES:
patent: 5302834 (1994-04-01), Murao
patent: 5553052 (1996-09-01), Oono et al.
patent: 5623466 (1997-04-01), Itonaga
patent: 5768027 (1998-06-01), Takahashi
patent: 5768232 (1998-06-01), Muramasatsu et al.
patent: 5774281 (1998-06-01), Meada et al.
patent: 5859818 (1999-10-01), Tateishi et al.
patent: 5886496 (1999-03-01), Furukawa et al.
patent: 5970035 (1999-10-01), Ohmori et al.

Affiliated with

Also associated with

Rating

Device for optically scanning a record carrier does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Device for optically scanning a record carrier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for optically scanning a record carrier will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1263647