Image reading device
AssigneeNippon Sheet Glass Co., Ltd.
InventorsMakoto Ikeda, Takashi Kishimoto, Shuya Ogi
Life of this patent
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Abstract
A rod lens array 3, a line image sensor 4, and a line image sensor 5 are provided in such a manner that a distance A1 between a point A of an object surface and one end of a rod lens array 3 is the same as a distance A2 between the other end of the rod lens array 3 and a light-receiving surface (i.e., an image formation surface) of a first line image sensor 4, and a distance B1 between a point B of the object surface and one end of the rod lens array 3 is the same as a distance B2 between the other end of the rod lens array 3 and a light-receiving surface (i.e., an image formation surface) of a second line image sensor 5.
Claims8
An image reading device in which an object surface inclines relative to an optical axis of a rod lens array, wherein a first point A on the object surface is read by a first image sensor through the rod lens array and a second point B on the object surface is read by a second image sensor through the rod lens array, characterized in that:
- a distance parallel to the optical axis between the point A and one end of the rod lens array on the side of the object surface is A1;
- a distance parallel to the optical axis between the point B and one end of the rod lens array on the side of the object surface is B1;
- a distance parallel to the optical axis between a light-receiving surface of the first image sensor and one end of the rod lens array on the side of the image sensor is A2, and
- a distance parallel to the optical axis between a light-receiving surface of the second image sensor and one end of the rod lens array on the side of the image sensor is B2,
- wherein the object surface, the rod lens array, and the image sensor are provided in the relation A1>B1 and A2>B2.
An image reading device in which an object surface inclines relative to an optical axis of a rod lens array, wherein a first point A on the object surface is read by a first image sensor through the rod lens array, and a second point B on the object surface is read by a second image sensor through the rod lens array, characterized in that:
- a distance parallel to the optical axis between the point A and one end of the rod lens array on the side of the object surface is A1;
- a distance parallel to the optical axis between the point B and one end of the rod lens array on the side of the object surface is B1;
- a distance parallel to the optical axis between a light-receiving surface of the first image sensor and one end of the rod lens array on the side of the image sensor is A2;
- and
- a distance parallel to the optical axis between a light-receiving surface of the second image sensor and one end of the rod lens array on the side of the image sensor is B2;
- wherein the object surface, the rod lens array, and the image sensor are provided in such a manner that the distance A1 and the distance A2 are the same, and the distance B1 and the distance B2 are the same.
An image reading device in which an object surface inclines relative to an optical axis of a rod lens array, wherein a first point A on the object surface is read by a first image sensor through the rod lens array, and a second point B on the object surface is read by a second image sensor through the rod lens array, characterized in that:
- a distance parallel to the optical axis between a light-receiving surface of the first image sensor and one end of the rod lens array on the side of the image sensor is A2;
- and
- a distance parallel to the optical axis between a light-receiving surface of the second image sensor and one end of the rod lens array on the side of the image sensor is B2;
- wherein the rod lens array and the image sensor are provided in such a manner that the distance A2 and the distance B2 are the same.
Dependencies are inferred from the claim text.