Image reading apparatus

An image reading apparatus for reading an original document by using regular reflection light and diffuse reflection light, characterized in that it comprises:

• a platen having a reading surface;
• a light source for irradiating light on said reading surface;
• a reflecting mirror for reflecting light reflected from said reading surface to a predetermined light path direction;
• a condenser lens for condensing light from said reflecting mirror;
• and
• a sensor for subjecting light from said condenser lens into photoelectric conversion;
• said light source being configured of a first light emitter for mainly irradiating the diffuse reflection light on the original document, and a second light emitter for mainly irradiating the regular reflection light on the original document;
• said reflecting mirror being configured of a plurality of reflecting members for reflecting light from said reading surface to a predetermined reading path direction;
• said reflecting mirror comprising:
• a first reflecting member for reflecting, at first, the reflected light from said reading surface;
• and
• a second reflecting member for reflecting light from said first reflecting member to a predetermined reading path direction;
• one of said reflecting members being arranged to be inclined at a predetermined angle with respect to said platen, and being configured of a flat-shaped translucent substrate;
• a mirror reflecting surface for specularly reflecting light and a translucent surface transmissive for light being formed on a part of the surface of said reflecting member;
• said mirror reflecting surface and said translucent surface being formed on said second reflecting member;
• said first light emitter being arranged between said platen and said first reflecting member;
• and
• said second light emitter being arranged at the back surface side of said reflecting member in such a way that light passes through the translucent surface of said second reflecting member and irradiates said reading surface.

An image reading apparatus for reading an original document by using regular reflection light and diffuse reflection light, characterized in that it comprises:

• a platen having a reading surface;
• a light source for irradiating light on said reading surface;
• a reflecting mirror for reflecting light reflected from said reading surface to a predetermined light path direction;
• a condenser lens for condensing light from said reflecting mirror;
• and
• a sensor for subjecting light from said condenser lens into photoelectric conversion;
• said light source being configured of a first light emitter for mainly irradiating the diffuse reflection light on the original document, and a second light emitter for mainly irradiating the regular reflection light on the original document;
• said reflecting mirror being configured of a plurality of reflecting members for reflecting light from said reading surface to a predetermined reading path direction;
• one of said reflecting members being arranged to be inclined at a predetermined angle with respect to said platen, and being configured of a flat-shaped translucent substrate;
• a mirror reflecting surface for specularly reflecting light and a translucent surface transmissive for light being formed on a part of the surface of said reflecting member;
• said first light emitter being arranged between said platen and the side of the mirror reflecting surface of said reflecting member;
• said second light emitter being arranged at the back surface side of the mirror reflecting surface of said reflecting member in such a way that light passes through the translucent surface of said reflecting member to irradiate said reading surface;
• with respect to said reflecting member having the mirror reflecting surface and the translucent surface,
• said mirror reflecting surface being formed nearly at the central portion of the reflecting member, and said translucent surface being formed nearly at the both ends of the reflecting member;
• and
• said second light emitter being arranged to irradiate light from the translucent surface formed at the both ends to said reading surface.

An image reading apparatus for reading an original document by using regular reflection light and diffuse reflection light, characterized in that it comprises:

• a platen having a reading surface;
• a light source for irradiating light on said reading surface;
• a reflecting mirror for reflecting light reflected from said reading surface to a predetermined light path direction;
• a condenser lens for condensing light from said reflecting mirror;
• and
• a sensor for subjecting light from said condenser lens into photoelectric conversion;
• said light source being configured of a first light emitter for mainly irradiating the diffuse reflection light on the original document, and a second light emitter for mainly irradiating the regular reflection light on the original document;
• said reflecting mirror being configured of a plurality of reflecting members for reflecting light from said reading surface to a predetermined reading path direction;
• one of said reflecting members being arranged to be inclined at a predetermined angle with respect to said platen, and being configured of a flat-shaped translucent substrate;
• a mirror reflecting surface for specularly reflecting light and translucent surfaces transmissive for light being formed on a part of the surface of said reflecting member;
• said first light emitter being arranged between said platen and the side of the mirror reflecting surface of said reflecting member;
• said second light emitter being arranged at the back surface side of said reflecting member in such a way that light passes through the translucent surfaces of said reflecting member to irradiate said reading surface;
• and
• at the back surface side of the mirror reflecting surface of said reflecting member, a reflector for reflecting light from said second light emitter to a predetermined direction being arranged;
• said reflector having a first reflecting surface for irradiating light from one of said translucent surfaces formed on both sides of said mirror reflecting surface to said reading surface, and a second reflecting surface for irradiating light from the other of said translucent surfaces to said reading surface.