Optical head and optical disk drive

Details Optical head and optical disk drive Optical head and optical disk drive

2005-10-18

2005-10-18

Pyo, Kevin (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

C250S225000, C369S044370, C369S112030, C369S112160

Reexamination Certificate

active

06956192

ABSTRACT:
A DVD laser emits a first light beam, and a CD laser emits a second light beam. An optical diffraction element diffracts first and second reflected lights corresponding to the first and second light beams, respectively. An optical detection element detects the first and second reflected lights reflected from a polarizing beam splitter. The optical axes of the CD and DVD lasers are set to diverge from each other. Thus, reflected light components necessary for focusing and tracking of a CD and a DVD are all detected by a detection element.

REFERENCES:
patent: 2004/0246853 (2004-12-01), Imai
patent: 2003-16672 (2003-01-01), None

Affiliated with

Also associated with

Rating

Optical head and optical disk drive 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 head and optical disk drive, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical head and optical disk drive will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3476797