Focus error detection device for an optical recording/playing ba

Details Focus error detection device for an optical recording/playing ba Focus error detection device for an optical recording/playing ba

1984-10-18

1987-04-14

Faber, Alan

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

369 46, 250201, G11B 709

Patent

active

046583912

ABSTRACT:
A focus error detection device to be used in an optical system for recording and/or playing back information, including a light detector made up of four light receiving elements arranged symmetrically with respect to the center of the light detector, a first operation circuit means connected to the light receiving elements for generating a focus error signal, and a second operation circuit means also connected to the light receiving elements for generating an off-set compensation signal. With this construction, and off-set of the focus error signal due to the deviation of the position of the reflection light beam is by far reduced as compared with the conventional devices.

REFERENCES:
patent: 4163149 (1979-07-01), Sawang
patent: 4446545 (1984-05-01), Diyk
patent: 4541082 (1985-09-01), Horikoshi

Affiliated with

Also associated with

Rating

Focus error detection device for an optical recording/playing ba does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Focus error detection device for an optical recording/playing ba, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Focus error detection device for an optical recording/playing ba will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1790447