| 摘要 |
The optical system is adapted for use in a copying machine. At least three reflecting mirrors are used for slitwise scanning and successively reflecting an image of a material, to be copied, placed on a stationary transparent pane, onto a stationary focusing lens. The intermediate or second mirror is disposed stationary adjacent to one of the opposite ends of the pane, whereas the first and third mirrors are moved along respective paths at respective rates in a predetermined relation but in respective directions of movement. This arrangement permits the movable mirrors to effect their functions without overrunning the limits defined by the opposite ends of the pane, thereby resulting in a compact or reduced size construction of the machine.
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