Image reading apparatus
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsTakafumi ENDO, Shigeru Toyota
Life of this patent
Estimating the term…
Abstract
An image reading apparatus includes: a transporting unit that transports an irradiated member having a light transmissive portion including irregularities; a light source that emits light, which irradiates the irradiated member, and the light source is placed on a one side with respect to the irradiated member and inclined by a predetermined angle with respect to a vertical plane that is perpendicular to the irradiated member; a lens that is placed on an another side with respect to the irradiated member and converges scattered light that is scattered by the irregularities; and a sensor that receives the scattered light converged by the lens.
Claims7
An image reading apparatus comprising:
- a transporting unit that transports an irradiated member having a light transmissive portion including irregularities;
- a light source that emits light, which irradiates the irradiated member, the light source being placed on a one side with respect to the irradiated member and inclined by a predetermined angle with respect to a vertical plane that is perpendicular to the irradiated member;
- a lens that is placed on an another side with respect to the irradiated member and converges scattered light that is scattered by the irregularities;
- and
- a sensor that receives the scattered light converged by the lens.
An image reading apparatus comprising:
- a transporting unit that transports an irradiated member having a light transmissive portion including irregularities;
- a light source that emits light, the light source being placed on a one face side with respect to the irradiated member and inclined by a predetermined angle with respect to a vertical plane that is perpendicular to the irradiated member;
- a light-guiding member that guides the light emitted from the light source to the irradiated member to irradiate the irradiated member;
- a lens that is placed on an another side with respect to the irradiated member and converges scattered light that is scattered by the irregularities;
- and
- a sensor that receives the scattered light converged by the lens.
An image reading apparatus comprising:
- a transporting unit that transports an irradiated member to a transport direction, the irradiated member having a light transmissive portion including irregularities and a light reflective portion;
- first and second light sources that emit lights, which irradiate the irradiated member, the first and the second light source being placed on a one side with respect to the irradiated member and inclined respectively in the transport direction and in an opposite transport direction that is opposite to the transport direction by a predetermined angle with respect to a vertical plane that is perpendicular to the irradiated member;
- a lens that is placed on an another side with respect to the irradiated member and converges scattered light that is scattered by the irregularities;
- a sensor that receives the scattered light converged by the lens;
- third and fourth light sources that are placed upstream to the transport direction and downstream to the transport direction with respect to the sensor respectively;
- and
- light-guiding members that guide lights emitted from the first and second reflective light sources to irradiate the irradiated member.
An image reading apparatus comprising:
- a transporting unit that transports an irradiated member to a transport direction, the irradiated member having a light transmissive portion including irregularities;
- a light source that emits light, which irradiates the irradiated member, the light source being placed on a one side with respect to the irradiated member and inclined by a predetermined angle with respect to a vertical plane that is perpendicular to the irradiated member;
- a lens that is placed on an another side with respect to the irradiated member and converges scattered light that is scattered by the irregularities;
- and
- a sensor that receives the scattered light converged by the lens to output an electric signal;
- an A/D converter that converts the output signal of the sensor to digital data;
- a storage unit that stores reference digital data obtained from a reference irradiated member;
- and
- a collating unit that collates the digital data from the A/D converter with the reference digital data stored in the storage unit.
Dependencies are inferred from the claim text.