Apparatus for detecting positional deviation of a moving stage i

Details Apparatus for detecting positional deviation of a moving stage i Apparatus for detecting positional deviation of a moving stage i

1991-04-24

1993-03-30

Psitos, Aristotelis

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4414, 369 4428, 369112, G11B 713

Patent

active

051990121

ABSTRACT:
The optical recording/reproducing apparatus provided with a dividing optical element which divides a part of the light from a light source and projects the divided light to a moving stage on which an objective lens is mounted, a reflecting optical element which is mounted on the moving stage and reflects the projected light from the dividing optical element, and a photodetector which detects the reflected light from the reflecting optical element, wherein the deviation amount of the moving stage from a reference position is detected on the basis of output of the photodetector. Since the condition when the reflected light is incident upon the photodetector is changed in consequence to the positional deviation of the reflecting optical element as the moving stage is moved, the deviation amount of the moving stage is detected on the basis of the output of the photodetector. The deviation amount of the moving stage can be detected at all times, thereby achieving good tracking control.

REFERENCES:
patent: 4363961 (1982-12-01), Okada et al.
patent: 4785438 (1988-11-01), Mizunoe
patent: 4815058 (1989-03-01), Nakamura et al.
patent: 4841507 (1989-06-01), Imai et al.
patent: 4956833 (1990-09-01), Kokado et al.
patent: 5016234 (1991-05-01), Nakamura et al.
patent: 5018124 (1991-05-01), Ogasawara et al.

Affiliated with

Also associated with

Rating

Apparatus for detecting positional deviation of a moving stage i does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for detecting positional deviation of a moving stage i, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for detecting positional deviation of a moving stage i will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1286501