Abstract: According to an embodiment, there are achieved an apparatus for image reading and a setting method for the apparatus with which adjusting workability is enhanced, an adjusting time is shortened and focusing of a 4-line CCD sensor as an optical sensor is set to the averagely best state. This embodiment is equipped with an optical sensor having plural line sensors having different numbers of pixels, a condenser lens for projecting an optical image to the optical sensor, and an adjusting mechanism for setting the distance between the condenser lens and the optical sensor so that the resolution of the line sensor having the largest number of pixels is highest among the plural line sensors.

Abstract: A color image reading apparatus includes a light source, first and second photoelectric conversion devices, first and second document size detection units and a control unit. The first photoelectric conversion device obtains first electric signal information at a first speed and the second photoelectric conversion device obtains second electric signal information at a second speed higher than the first speed. The first document size detection unit detects a document size based on the first electric signal information and the second document size detection unit detects a document size based on the second electric signal information. The control unit controls, at the time of forward scanning by the light source, so as to detect the document size by the second document detection unit.

Abstract: According to an embodiment, there are achieved an apparatus for image reading and a setting method for the apparatus with which adjusting workability is enhanced, an adjusting time is shortened and focusing of a 4-line CCD sensor as an optical sensor is set to the averagely best state. This embodiment is equipped with an optical sensor having plural line sensors having different numbers of pixels, a condenser lens for projecting an optical image to the optical sensor, and an adjusting mechanism for setting the distance between the condenser lens and the optical sensor so that the resolution of the line sensor having the largest number of pixels is highest among the plural line sensors.

Abstract: An image reading apparatus is provided which is capable of preventing abnormal lines from being generated on an image read out from an original document even if there is more or less dirt attached to a reading glass exclusively used for reading ADF original documents. In an image reading apparatus 100 of the present invention, in case of dirt adhering to a reading glass 11, when an original document 13 being sent to a document reading position PW by a transportation part 12 of an automatic document feeder 10 is being read by a scanning carriage 23 through the reading glass 11, abnormal densities appear in pixel data of positions corresponding to the dirt among the readout pixel data. However, a control part 30 of the image reading apparatus 100 nullifies the pixel data of abnormal densities, and compensates for the nullified pixel data based on their surrounding pixel data.

Abstract: An optical reading apparatus and a multifunction-type image forming apparatus, with a minimized thickness in a cabinet height direction and a housing shaped along an upper shape of discharge tray of the image forming apparatus provided thereunder. The optical reading apparatus comprises: platen glass defined with one end and the other end, on an upper surface of which an original document is placed; an optical reading unit that translates between the both ends on a lower surface of the platen glass, for obtaining image data by irradiating an original document surface with light through the platen glass; a control circuit board connected to the optical reading unit, for processing an electric signal; and a housing wherein a side on the side of the other end is thicker than a side on the side of the one end.

Abstract: An image reading device is operable in a manually placed document reading mode offered by a manually placed document reading section and an ADF document reading mode offered by an ADF document reading section. Reading mode detecting section detects in which mode a document to be read is in. First reading-speed setting section sets a reading speed of the ADF document reading section to a predetermined reading speed, upon detection by the reading mode detecting means that the document to be read is in the ADF document reading mode. Second reading-speed setting section sets a reading speed of the manually placed document reading section to a predetermined reading speed sufficient to reduce image vibration caused by reading by the manually placed document reading section, upon detection by the reading mode detecting section that the document to be read is in the manually placed document reading mode.

Abstract: An image reading apparatus has a scanner device and an ADF mounted to be openable/closable relative to a document glass which is located on the scanner device. The ADF has a conveying roller for conveying a document past the document glass. The scanner device has a carriage moved along the document glass to allow the scanning of the document set on the document glass and the reading of the image out of the document. Further, the image reading apparatus further has only one motor for driving the conveying roller and for moving the carriage, a clutch for the ADF which is switched to transmit a drive force of the motor to the conveying roller and a clutch for the scanner device which is switched to transmit a drive force of the motor to the carriage.

Abstract: The color image reading apparatus of the present invention has a light source for irradiating a document relatively moving and scanning the document, a first photoelectric conversion device for receiving optical image information from the document and the background of the document by the light source and obtaining first electric signal information at a first speed, a second photoelectric conversion device for receiving the optical image information and obtaining second electric signal information at a second speed higher than the first speed, a first document size detection unit for detecting, on the basis of the first electric signal information from the first photoelectric conversion device, the boundary between the document and the background of the document and detecting the document size, a second document size detection unit for detecting, on the basis of the second electric signal information from the second photoelectric conversion device, the boundary between the document and the background of the d

Abstract: An image reading apparatus is provided which is capable of preventing abnormal lines from being generated on an image read out from an original document even if there is more or less dirt attached to a reading glass exclusively used for reading ADF original documents. In an image reading apparatus 100 of the present invention, in case of dirt adhering to a reading glass 11, when an original document 13 being sent to a document reading position PW by a transportation part 12 of an automatic document feeder 10 is being read by a scanning carriage 23 through the reading glass 11, abnormal densities appear in pixel data of positions corresponding to the dirt among the readout pixel data. However, a control part 30 of the image reading apparatus 100 nullifies the pixel data of abnormal densities, and compensates for the nullified pixel data based on their surrounding pixel data.

Abstract: An color image reader according to the present invention includes a holding glass for holding an object, the holding glass being a rectangular, plate-like, flat member having a pair of long sides and a pair of short sides perpendicular to each other at right angles, an illuminating unit having an xenon lamp and a reflector both for illuminating the object placed closely on one side of the holding glass, the xenon lamp emitting light toward an irradiation range to irradiate the object, and the reflector having a first reflection plane and a second reflection plane to irradiate the irradiation range in a direction along the planes of the holding glass from a direction opposite to a direction of the light emitted from the xenon lamp, a reduction lens for providing an image-forming characteristic to light reflected by the object on the holding member illuminated by the illuminating unit, and a CCD sensor for receiving the reflected light to which the reduction lens provides the image-forming characteristic, and o

Abstract: An image reading apparatus has a scanner device and an ADF mounted to be openable/closable relative to a document glass which is located on the scanner device. The ADF has a conveying roller for conveying a document past the document glass. The scanner device has a carriage moved along the document glass to allow the scanning of the document set on the document glass and the reading of the image out of the document. Further, the image reading apparatus further has only one motor for driving the conveying roller and for moving the carriage, a clutch for the ADF which is switched to transmit a drive force of the motor to the conveying roller and a clutch for the scanner device which is switched to transmit a drive force of the motor to the carriage.

Abstract: An image reading device is operable in a manually placed document reading mode offered by a manually placed document reading section and an ADF document reading mode offered by an ADF document reading section. Reading mode detecting section detects in which mode of the manually placed document reading mode and the ADF document reading mode a document to be read is in. First reading-speed setting section sets a reading speed of the ADF document reading section to a predetermined reading speed, upon detection by the reading mode detecting means that the document to be read is in the ADF document reading mode. Second reading-speed setting section sets a reading speed of the manually placed document reading section to a predetermined reading speed sufficient to reduce image vibration caused by reading by the manually placed document reading section, upon detection by the reading mode detecting section that the document to be read is in the manually placed document reading mode.

Abstract: When a jam process is completed and a copying operation is restarted, a main CPU determines whether the copying operation which is presently set relates to copying of plural copy sets. If it is determined that the copying of plural copy sets is to be performed, the main CPU conforms which original in an order of originals is in the process of copying. If it is confirmed which original is in the process of copying, copies of this original already delivered on sort bins are discharged onto a recycle tray. Then, the set copying operation is restarted from copying of this original.