Image scanner using a rod-type light source
AssigneeNippon Seimitsu Kogyo Kabushiki Kaisha
InventorKatsushi Natori
Life of this patent
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Abstract
Transparent light-emitting rod and lamp united to constitute a light source unit are separately placed in an image reading region and a lamp moving region, so that the light-emitting rod can be brought close to a reading platen on which a given objective image sheet to be read is placed, irrespective of the size of the lamp, thereby to lessen the loss of desired light emitted from the light source. The image reading and lamp moving regions are separated by a shielding means so as to effectively remove inadequate heat generated by the light source, thereby to protect the component parts contained in an image scanner from the heat.
Claims14
An image scanner for optically reading a given objective image and outputting image data signals, which comprises a casing, a light source unit including a transparent light-emitting rod and a light source lamp attached to one end of said light-emitting rod so as to emit light inside said light-emitting rod to thereby radiate outside a beam of light from said light-emitting rod, at least one guide rail means, a light source driving means for allowing said light source unit to move parallel along the guide rail means, and a shielding means for partitioning inside said casing into an image reading region in which said light-emitting rod moves and a lamp moving region in which said light source lamp moves.
An image scanner for optically reading a given objective image and outputting image data signals, which comprises a casing;
- at least one guide rail means disposed in said casing;
- a light source unit including a transparent light-emitting rod and a light source lamp attached to one end of the light-emitting rod so as to emit light inside the light-emitting rod to thereby radiate outside a beam of light from said light-emitting rod, said light source unit being disposed movably parallel along said guide rail means;
- a light source driving means for allowing said light source unit to move parallel along said guide rail means;
- and a shielding hood for enveloping said light source lamp, said shielding hood being open in the direction in which said light source moves.
Dependencies are inferred from the claim text.