| 摘要 |
PURPOSE:To photograph with optional magnifications approximating an original size, by changing the direction, where an optical system is moved, in accordance with magnifications and allowing two mirrors to approach and separate from each other when the optical system is moved. CONSTITUTION:A horizontal lever 15 fixed in a direction parallel with the surface of an original picture and an adjusting lever 9 whose inclination angle theta is changed around a fulcrum O by magnifications are provided, and a bending part of a hook- shaped frame 13 or an L-shaped member constituting the optical system is engaged with the adjusting lever 9 and is slided along the adjusting lever 9 at a scanning time. The hook-shaped frame 13 is provided with 3 pulleys 10-12 in respective tip parts and the bending part, and a wire 14 is stretched from a point P so that the wire 14 is wound around the outside circumference of the pulley once and passes through a point Q and is wound half around the outside circumference of the pulley 10 and passes through a point R and is wound around outside circumferences of pulleys 11 and 12 is returned to the point P. An original picture side mirror is fixed at the point R, and a film side mirror is fixed at the point Q, and a sliding piece 16 is fixed at the point P, and this sliding piece 16 is attached to the horizontal lever 15 freely slidably. |
