G - Physics – 03 – B
Patent
G - Physics
03
B
88/96
G03B 27/02 (2006.01) G02B 13/24 (2006.01) G03B 27/52 (2006.01)
Patent
CA 1099549
ABSTRACT OF THE DISCLOSURE A copying-machine projection system successively projects successive strip-shaped zones of an original onto successive strip-shaped zones of a photosensitive surface. The projection system is of the type comprising at least one row of component projection objectives extending transverse to the direction of relative movement as between projection system and photosensitive surface. The individual component projection objectives are consti- tuted by corresponding lenticular elements of plural lens bars, the lens bars extending transverse to the relative-movement direction and being provided with respective rows of lenticular elements. The projection system projects a strip-shaped image onto the photo- sensitive surface but also forms an intermediate image plane. Located at the latter is a lens-aperture plate, the lens apertures of which are so shaped that the adjoining boundaries of adjoining lens apertures extend at an angle relative to the direction per- pendicular to the relative-movement direction, this angle being at most equal to 80°. As a result of this inclination, if the individual light fields projected improperly overlap, improperly overlap more or less than they nominally should, or fail to contact each other. the resultant boost or decrease in illumination is not confined to a longitudinally extending stripe which would be visible in the final copy but instead is averaged out over a surface area whose breadth, measured perpendicular to the relative- movement direction is substantially greater than the breadth of the excessive or absent overlap. -1-
318083
Feneberg Paul H.
Kirchhof Gunther
Konigl Georg
Schatz Anton
Agfa-Gevaert Ag
Fetherstonhaugh & Co.
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