Method and device for correcting vertical framing errors

Details Method and device for correcting vertical framing errors Method and device for correcting vertical framing errors

1990-10-11

1992-01-21

Hayes, Monroe H.

Optics: motion pictures

With framing and/or travel ghost elimination

352161, 352163, 352164, G03B 2146

Patent

active

050823574

ABSTRACT:
Method for correcting vertical framing errors during the projection of an intermittently transported perforated motion picture film by means of a film transport sprocket engaging the film perforations, said sprocket being driven by an electric motor whose rotor is connected with an angle indicator device which delivers to a regulating device controlling the electric motor, position signals corresponding to the angular position of the rotor. To correct device-specific vertical framing errors, the frame positions are measured with a geometrically precise measuring film over a plurality of frames, the individual frame positions are stored, and the position of the angle indicator disk is changed by a correction value relative to the film transport sprocket. For correcting operation-dependent vertical framing errors, error tables for framing errors that occur during projection are stored, the frame positions are continuously measured, and the recorded measured values are compared with values stored in the error tables, an error table which optimally represents the measured values is prepared, and a correction table corresponding to this error table is selected whose correction values are delivered to the regulating device.

REFERENCES:
patent: 2192987 (1940-03-01), Runge
patent: 3565521 (1971-02-01), Butler et al.
patent: 3622235 (1971-11-01), Yamada
patent: 4022525 (1977-05-01), Boudouris
Weise, Kinogeratetechnik, 1950, pp. 34-39.

Affiliated with

Also associated with

Rating

Method and device for correcting vertical framing errors does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and device for correcting vertical framing errors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and device for correcting vertical framing errors will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-112628