Photocopying – Projection printing and copying cameras – Illumination systems or details
Patent
1981-03-03
1983-02-08
Wintercorn, Richard A.
Photocopying
Projection printing and copying cameras
Illumination systems or details
355 77, G03B 2754
Patent
active
043726798
ABSTRACT:
Compensation is provided in the illumination of a mechanically line scanned object plane scene, where the light source is moved across the object plane to provide the light necessary for optical projection of the scene onto an image plane. This compensation gives allowance for the difference in light ray coupling effectiveness of the usual projection optics arrangement for light rays which are on axis with the component lenses, relative to the light rays which are off axis. Predetermined compensation of the illumination which nearly matches the off-axis falloff optical characteristics of the projection optics system may provide a substantially flat, uniform field illumination of the projected scene at the image plane. The instantaneous position related illumination is controlled, from a function usually stored in an electronic memory, by changing the effective electric power applied to the illuminating lamp during any predetermined frame of time.
REFERENCES:
patent: 2260495 (1941-10-01), Tutwiler
patent: 4086010 (1978-04-01), Gallo, Jr. et al.
Coulter Systems Corp.
Wintercorn Richard A.
LandOfFree
Image illumination compensation method and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Image illumination compensation method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image illumination compensation method and apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-47510