摘要:
An image forming optical system (100) includes a first image forming unit (101) configured to form an image of a first surface (1) onto a second surface (2), a second image forming unit (102) including at least a portion of the first image forming unit (101) and configured to form an image of the second surface (2) onto a third surface (3), and a deflection unit (104) configured to deflect light from the second surface (2) toward the third surface (3). The numerical aperture of the first image forming unit (102) on the side toward the second surface (2) is larger than the numerical aperture of the second image forming unit (102) on the side toward the second surface (2).
摘要:
An image reading device includes: a sensor module having a light source and a plurality of sensors; a white reference plate; and an image processor that generates correction data to be used for shading correction and performs the shading correction on image signals, using the correction data. The light source is configured to switch between at least a first luminous intensity and a second luminous intensity lower than the first luminous intensity. The image processor acquires intermediate data by causing the plurality of sensors to acquire an image signal of the white reference plate illuminated with the second luminous intensity, generates black correction data, based on the intermediate data, and performs the shading correction, using the black correction data, so that a density unevenness, in an image, caused by interference between image signals from the plurality of sensors.
摘要:
An image sensor unit (60) includes: a light source part (25) that emits at least ultraviolet light in a main-scan direction to an object to be illuminated; a light condenser (32) that focuses light from the object to be illuminated; an image sensor (75) that converts the light focused by the light condenser (32), into an electric signal; and an ultraviolet cut part (65) that is disposed between the object to be illuminated and the image sensor (75), cuts off ultraviolet light in light reflected by the object to be illuminated, and allows fluorescent light to transmit therethrough. The image sensor (75) includes an ultraviolet detection part (77) that detects light in the ultraviolet light emitted from the light source part (25), the detected light having been reflected by a reflecting part but having not transmitted through the ultraviolet cut part (65).
摘要:
An image reading device includes: an FB glass; a sensor module having a light source and a plurality of sensors; and an image processor that generates correction data to be used for shading correction and performs the shading correction on image signals by using the correction data. The plurality of sensors is arranged in a main scanning direction and is configured to form an image signal on a single line. The image processor acquires second black data by causing the plurality of sensors to acquire an image signal of a reference sheet placed on the FB glass with the light source turned on, and generates black correction data based on the second black data. By performing the shading correction by using the black correction data, the image processor corrects density unevenness, in an image, caused by interference between image signals from the plurality of sensors.
摘要:
An image processing apparatus includes an image compressing unit, and a print-data generating unit. The image compressing unit divides the image of one page's worth of the document into each band region by a predetermined width in the sub-scanning direction and sets a rectangular region by a further division of each band region by a predetermined width in the main-scanning direction to generate rectangular compressed data. When the print-data generating unit generates the print data where a plurality of pages of document image are aggregated in one sheet, and an region in which the image does not exist occurs in a last page after the aggregation, the storing control unit complements the region in which the image does not exist in the rectangular compressed data storage unit using the white image data stored in the white image data storage unit.
摘要:
In an image reading device, a sync signal outputting portion alternately outputs a first sync signal and a second sync signal while the document sheet is moving in a range including a first position and a second position in a conveyance path. A first image sensor and a second image sensor read images from both sides of a document sheet and output image signals in synchronization with the first sync signal and the second sync signal, respectively. An AFE performs a predetermined signal processing in sequence to the image signals that are output alternately.
摘要:
An image sensor includes: a lens configured to focus light after passing through or reflected by an object to be read and passing through a first transparent plate; a sensor arranged along the X direction and configured to receive the light focused by the lens; a first casing fixing the first transparent plate and containing or retaining the lens and the sensor; and a bracket arranged at the X direction end portion of the first casing and configured to seal the lens contained or retained by the first casing.
摘要:
An image reader is provided, which includes a first analog front end unit configured to perform A/D conversion for analog signals that are output via a first group of channels of a number resulting from rounding up, to a closest whole number, an average value between a number of at least one channel for a first image reading unit and a number of channels for a second image reading unit, among analog signals output from the first image reading unit and the second image reading unit, and a second analog front end unit configured to perform A/D conversion for analog signals that are output via a second group of channels other than the channels in the first group, among the analog signals output from the first image reading unit and the second image reading unit.
摘要:
An image processing apparatus includes an image compressing unit, and a print-data generating unit. The image compressing unit divides the image of one page's worth of the document into each band region by a predetermined width in the sub-scanning direction and sets a rectangular region by a further division of each band region by a predetermined width in the main-scanning direction to generate rectangular compressed data. When the print-data generating unit generates the print data where a plurality of pages of document image are aggregated in one sheet, and an region in which the image does not exist occurs in a last page after the aggregation, the storing control unit complements the region in which the image does not exist in the rectangular compressed data storage unit using the white image data stored in the white image data storage unit.
摘要:
Disclosed is a method of adjusting a scanner for scanning of an original, the scanner comprising an image sensor and a light source for emitting light, the method comprising the steps of: a) moving the image sensor in order for it to be located at a predefined scanning position by means of a movable mechanical member; b) determining the difference between the scanning position and the predefined scanning position; where the method further comprises: determining the difference between the scanning position and the predefined scanning position by detecting radiation from at least one fix-point having a fixed position relative to the image sensor.