Optical focusing device with two controls

Details Optical focusing device with two controls Optical focusing device with two controls

1980-11-17

1982-10-12

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

369 45, G11B 708

Patent

active

043541038

ABSTRACT:
A focusing system for focusing a radiation beam onto an object, in particular an optical disc. The focusing system comprises focusing-error detection means and two control elements for correcting the focusing depending on the detected focusing error. The detection means are constructed so that via one of the two control elements a feedback servo system is obtained while via the other control element a servo system without feedback, i.e. a feed-forward system, is obtained.

REFERENCES:
patent: 4128847 (1978-12-01), Roullet et al.

Affiliated with

Also associated with

Rating

Optical focusing device with two controls 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 focusing device with two controls, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical focusing device with two controls will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-224965