OPTICAL DEVICE FOR VARIABLE MAGNIFICATION ELECTROSTATIC COPYING MACHINE

摘要

PURPOSE:To move an exposure correcting plate as required according to the change of magnification by mounting the exposure correcting plate on a supporting frame and partially advancing the exposure correcting plate in an optical path from an original to a photosensitive body by moving the supporting frame from one position to the other. CONSTITUTION:The exposure correcting plate 150 is mounted to the supporting frame 102 and advanced partially in the optical path from the original to the photosensitive body 10 when the supporting frame 120 is moved from one position to be other. In such a case, the exposure correcting plate 105 is moved in a direction inclined to an optical axis and advanced in the optical path. Thus, the exposure correcting plate can be moved as required according to the change of magnification without necessitating special moving and locating means.