Agfa-gevaert Ag

Gunther Kirchhof

Anton Schatz

Peter Lermann

Otto Stemme

Volkmar Stenzenberger

Paul Feneberg

Anton Theer

Georg Konigl

Joachim Notzel

Harthmuth Buczek

The pattern scanning projection device for copying machines of the type in which a pattern is projected in a strip-like manner on an image recording support by means of a pattern scanning unit which is movable in guiding grooves and includes a plurality of scanning lens plates. The lens plates for the sake of uniform projection of partial images cooperate with aperture and/or image field diaphragms and with separating diaphragms. The lens plates are individually insertable into an objective housing which is detachable from the copying machine. The housing is assembled of two parts, one housing part being provided with mounting longitudinal grooves engaging one longitudinal edge of respective lens plates and the lens plates being centered in the longitudinal grooves by separate centering grooves and being secured in central position at one point only so as to permit longitudinal displacement due to mechanical or thermal stresses. The other longitudinal edges of the plates are covered by the other housing part which is preferably made of a plastic material. The entrance and the discharge ports of the objective housing are hermetically sealed by glass panes.

Pattern scanning device for copying machines

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 constituted 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 photosensitive 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 perpendicular to the relative-movement direction, this angle being at most equal to 80.degree.. 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.

Projection system for copying machines

A still or cinematographic camera has a zoom lens movable between two focal-length settings. An eyelevel viewfinder is provided. Also provided is an actuating arrangement which is coupled with both the zoom lens and with components of the viewfinder so as to change the image are a visible in the viewfinder as it moves the lens from one to the other of the focal-length settings.

Camera with zoom lens

Growing community of inventors

Taufkirchen, Germany

Gunther Kirchhof