Photocopying – Contact printing – Light boxes
Patent
1988-06-30
1991-10-29
Braun, Fred L.
Photocopying
Contact printing
Light boxes
355 68, 355243, G03G 1504
Patent
active
050619608
ABSTRACT:
A slit exposure type photocopier apparatus includes an original document platform on which an original document is to be located. An electrostatic latent image support member receives a projected image of the original document as a result of a scanning optical system and an exposure light source. The scanning optical system includes a projection light assembly which is movable along the optical axis in order to change image magnification. A light measuring sensor can be positioned adjacent a side of the projection lens assembly and can measure light reflected from the original at a position displaced, in the forward scan direction, from the actual position on the original that is being projected as a recorded image on the electrostatic latent image support member. The actual displaced position for light measurement will be a function of the image magnification and will be capable of compensating for the lag time involved in changing the exposure output of the exposure lamp.
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Ito Kouji
Kitajima Yamato
Braun Fred L.
Minolta Camera Kabushiki Kaisha
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