Technique for monitoring galvo angle

Details Technique for monitoring galvo angle Technique for monitoring galvo angle

G - Physics

11

B

352/32.2

G11B 7/00 (2006.01) G11B 7/085 (2006.01) H04N 5/76 (2006.01)

Patent

CA 1187605

TECHNIQUE FOR MONITORING GALVO ANGLE ABSTRACT OF THE DISCLOSURE Disclosed is a radiant energy optoelectronic position monitor system which detects the angular position of a "galvonometer mirror" (beam scanner) used in an optical disk memory arrangement. Using a single infra-red monitor beam, angular motion is converted to linear displacement of an image on a detector cell so as to produce a corresponding electrical signal. This signal is presented to a processing circuit with an analog divider to normalize output scale factor. The result is a high gain electrical circuit for recovering output signals in an environment with strong magnetic interference. Such a position sensor is described as especially apt for use in a "three beam" laser optical system comprising a writing beam and two reading beams all incident on the same track of a rotating disk optical recording medium. One of these reading beams is incident on the track ahead of the writing beam so as to serve as a "read-before-write" beam, while the other reading beam is incident on the track behind the recording beam so as to serve as a "read-after-write" beam.

418071

Affiliated with

Also associated with

Rating

Technique for monitoring galvo angle does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1303706