Photocopying – Contact printing – Light boxes
Patent
1992-03-30
1994-03-29
Braun, Fred L.
Photocopying
Contact printing
Light boxes
355214, 355246, G03G 1504, G03G 1506, G03G 2100
Patent
active
052989615
ABSTRACT:
An image forming apparatus includes an electrophotographic photosensitive member, a first optical device for forming a first electrostatic latent image on the photosensitive member, and a second optical device for forming a second electrostatic latent image on the photosensitive member. The first optical device includes a light source for illuminating an original to be recorded and a focusing optical system for projecting light reflected from the illuminated original onto the photosensitive member. The second optical device includes a modulated light emitting device for emitting modulated light in response to a record image signal and an optical device for exposing the modulated light onto the photosensitive member. A developer develops the first and second electrostatic latent images, an adjuster changes a luminous intensity of the light source to form the first electrostatic latent image and a controller controls a development bias voltage applied to the developer to develop the second electrostatic latent image in accordance with the change in the amount of luminous intensity of the light source.
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Braun Fred L.
Canon Kabushiki Kaisha
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