| 摘要 |
PURPOSE:To obtain a both-sides copy image whose top and reverse sides are in the same top-bottom relation by turning images of an original by 180 deg. for every frame and thus forming the both-sides copy image. CONSTITUTION:When a prism 38 is rotated around an optical axis (e), its projection image rotates by an angle twice the angle of rotation of the prism. Therefore, when the prism 38 is rotated around the optical (e) by 90 deg., the projection image changes in direction by 180 deg. and is projected. Namely, the prism 38 is rotated by 90 deg. to turns the image (B) on a film by 180 deg. and project it on a screen 11, so that the image is formed on a photosensitive drum 15. Thus, a both-sides copy having 'A' and 'B' in the same direction is obtained. |
