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Canon Inc
Original Assignee
Canon Inc
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Filing date
Publication date
Application filed by Canon IncfiledCriticalCanon Inc
Priority to JP7190377ApriorityCriticalpatent/JPS547345A/en
Publication of JPS547345ApublicationCriticalpatent/JPS547345A/en
Combination Of More Than One Step In Electrophotography
(AREA)
Optical Systems Of Projection Type Copiers
(AREA)
Control Or Security For Electrophotography
(AREA)
Abstract
PURPOSE:To make it possible to obtain a partial copying or the control of a partial light amount of exposure by focusing the photoimage of an original document for the electrophotographic copier on the photoreceptor via the first focusing means, an image amplifier which has plural sections of amplification and its amplification rate is variable, and the second focusing means.
JP7190377A1977-06-171977-06-17Forming device for image
PendingJPS547345A
(en)