JP2002057842A5 - - Google Patents

Description

[0010]
[Means for Solving the Problems]
The image sensor unit according to the present invention comprises: a light source for illuminating an image information surface of a document; imaging means for imaging the reflected light from the document at equal magnification and causing the light to enter the one-dimensional light receiving element array; An image sensor unit comprising: means and a frame integrally holding the one-dimensional light receiving element array, wherein the light source includes a plurality of light emitting elements and a light guide for guiding the light of the light emitting elements to the document; A pair of the light sources is provided on both sides of the imaging optical system, and the plurality of light emitting elements are mounted on a circuit board.

[0012]
Further, in the image sensor unit of the present invention, the light emitting elements are provided at the same side end portions in the longitudinal direction of the pair of light guides.

Claims (7)

A light source for illuminating an image information surface of a document, an imaging means for forming an image of reflected light from the document at the same magnification and causing the light to enter the one-dimensional light receiving element array, the light source, the imaging means and the one-dimensional light receiving element array An image sensor unit comprising a frame for holding the
The light source includes a plurality of light emitting elements and a light guide for guiding the light of the light emitting elements to the document, and a pair of the light sources are provided on both sides of the image forming optical system. An image sensor unit characterized in that it is mounted on The image sensor unit according to claim 1, wherein the light emitting element is fixed to a longitudinal end of the light guide in each light source. The image sensor unit according to claim 2, wherein the light emitting elements are provided at opposite ends of the pair of light guides in the longitudinal direction. The pair of light sources have the same characteristics, and are provided point-symmetrically with respect to an axis extending parallel to the optical axis of the imaging optical system from the approximate center of the one-dimensional light receiving element array. Item 4. The image sensor unit according to item 3. The image sensor unit according to claim 2, wherein the light emitting elements are provided at ends on the same side in the longitudinal direction of the pair of light guides. The image sensor unit according to any one of claims 1 to 5, wherein each light emitting element is configured by providing one or a plurality of single color or plural color LEDs. A movement mechanism for performing a predetermined relative movement between the image sensor unit according to any one of claims 1 to 6 and a document to be read, the relative movement between the image sensor unit and the document An image reading apparatus characterized in that an image of the original is read.