| 摘要 |
PURPOSE:To obtain a copied picture image in exact focusing even when the copied face of an original is uneven by measuring the distance from the reference plane of image forming of an original placed on an original platen with the copied face facing upward to the copied face before exposure scanning and keeping the length of light path from the copied face to a photosensitive body constant according to the measured value. CONSTITUTION:The distance from the reference plane of image forming of an original to the copied face facing upward is measured before exposure scanning, and the length of light path from the copied face to a photosensitive body is kept constant according to the measured value. That is, a distance measuring device 7 is fixed to an end of a U-shaped arm 50, and a contact piece 53 which is in contact with a book cassette 2 is attached to another end. The arm 50 moves guided by a guide 51 fixed to the body of the copying device, and moves the distance measuring device 7 positioned right above a reference line 40 and between the book cassette 2 and an illuminating lamp 8 in the direction parallel to the referenceplane of image forming Yk of the book cassette 2 and perpendicular to the reference line 40, and the distance measuring device 7 is moved by a guide section 20a by the amount corresponding to each size. |
