Radiation imagery chemistry: process – composition – or product th – Post imaging processing – Physical developing
Patent
1983-08-19
1985-05-14
Mathews, A. A.
Radiation imagery chemistry: process, composition, or product th
Post imaging processing
Physical developing
430 24, G03B 4100, G03C 500
Patent
active
045168415
ABSTRACT:
The present invention is an improvement in a method of screening a line screen slit mask color picture tube. Such method includes coating a faceplate panel of the tube with a photosensitive material, inserting a slit shadow mask into the panel and exposing the photosensitive material by passing light from a line light source through the slits of the mask. The improvement comprises positioning a generally cylindrical shaped lens between the line light source and the faceplate panel during exposure of the photosensitive material. The longitudinal axis of the lens is oriented perpendicular to the longitudinal axis of the line light source. Because of the presence of the lens, the images of the line light source projected through the slits of the mask onto the photosensitive material at locations off the major and minor axes of the panel are rotated toward parallelism with the minor axis thereby resulting in exposure of straight smooth lines on the photosensitive material.
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Hallacher L. L.
Irlbeck D. H.
Mathews A. A.
RCA Corporation
Whitacre E. M.
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