Available light marginal illumination system
AssigneeXerox Corporation
InventorsRobert F. Allis, Vincent A. Capaccio
Life of this patent
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Abstract
A reproducing apparatus including an optical system for viewing an object such as a document and for projecting an image thereof onto a photosensitive surface selectively at a first copy image magnification or at a reduced copy image magnification. The optical system includes a lamp for illuminating the object. A margin illumination system is provided utilizing stray light derived from the lamp of the optics system for illuminating margin regions of the photosensitive surface to prevent their subsequent development. The margin illumination system is selectively operable in the reduction mode of operation.
Claims20
In a reproducing apparatus including means for forming an image on a sheet of final support material, said image forming means including means for viewing an object and for projecting an image thereof onto a photosensitive surface selectively at a first copy image magnification or at a second copy image magnification which is reduced as compared to said first copy image magnification, said viewing means including means for illuminating said object;
- said photosensitive surface being arranged for movement in a given direction;
- and further including means responsive to the selection of said second projected image magnification for illuminating at least one unused side margin region of said photosensitive surface, said side margin region being of greatest extent substantially in said given direction;
- the improvement wherein said means for illuminating said side margin region comprises:
- means selectively operable in response to said second magnification selection for intercepting a portion of the illumination derived from said illumination means and for applying said portion of said illumination to said side margin.
In a reproducing apparatus including means for forming an image on a sheet of final support material, said image forming means including means for viewing an object and for projecting an image thereof onto a moving photosensitive surface selectively at a first copy image magnification or at a second copy image magnification which is reduced as compared to said first copy image magnification;
- said viewing means including:
- means for illuminating said object;
- a lens arranged along an optical ray path extending from said object to said surface;
- and
- means responsive to the selection of said second projected image magnification for illuminating at least one unused margin region of said photosensitive surface;
- the improvement wherein said means for illuminating said margin region comprises:
- means arranged along said ray path between said lens and said object for intercepting a portion of the image rays and for applying said portion of the image rays to said margin region without passage through said lens.
Dependencies are inferred from the claim text.