Original reader
AssigneePfu Limited
InventorsYasunori Miyauchi, Minoru Masuda
Life of this patent
Estimating the term…
Abstract
An original reader such as an image scanner for inputting image information, provided with a optical source for illuminating an original, a lens unit (8) capable of optically changing resolution, and a solid-state image sensor substrate placed on an image forming plane (10) of the lens, wherein the lens unit (8) includes a plurality of lenses that can deal with a plurality of different resolution and one lens corresponding to a specified resolution is selectively moved into a light path. The lens unit and the solid-state image sensor substrate are independently movable in the direction of optical axis for focusing.
Claims25
An original reader providing an optical source for lighting a manuscript, comprising:
- an image sensor;
- a lens unit comprising lenses focusing an image of the manuscript on the image sensor;
- a unit moving the lens unit in a sub-scanning direction along the manuscript;
- a unit moving one of the lenses on an optical path between the manuscript and the image sensor;
- and
- a unit moving the image sensor,
- wherein a focal length of each of the lenses is different from each other and corresponds to a resolution to read a portion of the manuscript assigned to each of the lenses, and the lens unit and the image sensor move independently from each other.
Dependencies are inferred from the claim text.