Picture reading device and image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorMasanori Akita
Life of this patent
Estimating the term…
Abstract
In a picture reading device having a light emitting element that obliquely irradiates the surface of a paper with light, an area sensor that reads its irradiated area as a picture in which information related to a paper is read on the basis of the read results, the light irradiating element is arranged with an angle so as to irradiate the light from a direction oblique to a conveying direction of the paper. As a result, the picture reading device of the present invention eliminates such a problem that the same paper surface is received as a different image depending on the incident direction of the light, and the information related to an object to be read cannot be accurately read.
Claims13
A picture reading device, comprising:
- an illuminating unit adapted to illuminate a surface of a sheet to be read with light;
- and
- a reading unit adapted to read the illuminated surface of the sheet as a picture, for the purpose of calculating a roughness of the surface of the sheet based on the picture read by said reading unit,
- wherein said illuminating unit is arranged in such a manner that a line resulting from projecting a line connecting the illuminating unit and the reading unit on a surface of the sheet is oblique to a conveying direction of the sheet.
An image forming apparatus, comprising:
- an illuminating unit adapted to illuminate a surface of a recording material with light;
- a reading unit adapted to read the illuminated surface of the recording material as a picture;
- and
- a calculating unit adapted to calculate a roughness of the recording material based on the picture read by said reading unit,
- wherein said illuminating unit is arranged in such a manner that a line resulting from projecting a line connecting the illuminating unit and the reading unit on a surface of the recording material is oblique to a conveying direction of the recording material.
Dependencies are inferred from the claim text.