Optical scanning system
AssigneeRicoh Company, Ltd.
InventorJyoichi Fuwa
Life of this patent
Estimating the term…
Abstract
A document to be scanned is placed on a fixed transparent cylindrical platen and a mirror is totatable about the axis of the platen. A linear or single line cathode ray tube is fixed in position to produce a light beam which is reflected from the mirror onto the document and moves along the surface of the document in a main scan direction. A light receiving unit comprising a fibre optic bundle and a photoelectric generator is arranged parallel to the main scan direction to receive the light beam reflected from the document. Drive means are arranged to rotate the mirror and move the receiving unit so that the light beam is displaced in the subscan direction perpendicular to the main scan direction and the receiving unit is moved in synchronism therewith.
Claims9
A scanning system comprising:
- fixed light beam generating means to produce a light beam and move the light beam along a first linear path;
- movable reflecting means to reflect the light beam onto a fixed surface to be scanned so that the light beam moves in a second linear path along the surface;
- elongated light receiving means disposed parallel to the second linear path and closely adjacent to both the surface and the second linear path to receive the light beam reflected from the surface;
- and
- drive means to move the reflecting means to displace the light beam in a direction perpendicular to the second linear path and to move the receiving means in synchronism with the movement of the reflecting means so that the receiving means moves in said direction perpendicular to the second linear path at the same speed as the displacement of the light beam in said direction so that the receiving means is maintained closely adjacent to both the surface and the second linear path to receive the light beam reflected from the surface.
Dependencies are inferred from the claim text.