Pickup for optical disc

Details Pickup for optical disc Pickup for optical disc

1983-11-17

1988-03-29

Corbin, John K.

3501622, G02B 2744, G02B 518

Patent

active

047339438

ABSTRACT:
A pickup system for an optical disc reading/recording apparatus in which a micro Fresnel lens, formed with concentric circular gratings, is used in place of an optical element, such as an objective lens, for focussing and collimating light beams from a semiconductor light source. The pickup system so formed is light in weight, easily miniaturized, and inexpensive to manufacture. The micro Fresnel lens can be formed as an integral unit with the semiconductor laser by mounting the lens in a window of the case of the semiconductor laser.

REFERENCES:
patent: 4036552 (1977-07-01), Lee et al.
patent: 4295152 (1981-10-01), Khoe et al.
Genovese et al., "Phase Plate Lens for a Multiple Image Lens System", IBM Tech. Disc., vol. 8, No. 12, May 1966.

Affiliated with

Also associated with

Rating

Pickup for optical disc does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Pickup for optical disc, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pickup for optical disc will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1085876