WO2005053307A1 - イメージセンサーユニット及び画像読取装置 - Google Patents
イメージセンサーユニット及び画像読取装置 Download PDFInfo
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- WO2005053307A1 WO2005053307A1 PCT/JP2003/015147 JP0315147W WO2005053307A1 WO 2005053307 A1 WO2005053307 A1 WO 2005053307A1 JP 0315147 W JP0315147 W JP 0315147W WO 2005053307 A1 WO2005053307 A1 WO 2005053307A1
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- Prior art keywords
- optical axis
- light
- original
- focal point
- image
- Prior art date
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
- H04N1/10—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces
- H04N1/1013—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces with sub-scanning by translatory movement of at least a part of the main-scanning components
- H04N1/1017—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces with sub-scanning by translatory movement of at least a part of the main-scanning components the main-scanning components remaining positionally invariant with respect to one another in the sub-scanning direction
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/024—Details of scanning heads ; Means for illuminating the original
- H04N1/028—Details of scanning heads ; Means for illuminating the original for picture information pick-up
- H04N1/02815—Means for illuminating the original, not specific to a particular type of pick-up head
- H04N1/02845—Means for illuminating the original, not specific to a particular type of pick-up head using an elongated light source, e.g. tubular lamp, LED array
- H04N1/02855—Means for illuminating the original, not specific to a particular type of pick-up head using an elongated light source, e.g. tubular lamp, LED array in combination with a light guide, e.g. optical fibre, glass plate
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/024—Details of scanning heads ; Means for illuminating the original
- H04N1/028—Details of scanning heads ; Means for illuminating the original for picture information pick-up
- H04N1/02815—Means for illuminating the original, not specific to a particular type of pick-up head
- H04N1/02845—Means for illuminating the original, not specific to a particular type of pick-up head using an elongated light source, e.g. tubular lamp, LED array
- H04N1/0286—Means for illuminating the original, not specific to a particular type of pick-up head using an elongated light source, e.g. tubular lamp, LED array in combination with a light integrating, concentrating or defusing cavity
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
- H04N1/19—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays
- H04N1/191—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays the array comprising a one-dimensional array, or a combination of one-dimensional arrays, or a substantially one-dimensional array, e.g. an array of staggered elements
- H04N1/192—Simultaneously or substantially simultaneously scanning picture elements on one main scanning line
Definitions
- the present invention relates to an image sensor unit and an image reading apparatus suitable for an image scanner, a facsimile, a copying machine, and the like, and more particularly, to an image sensor unit and an image reading apparatus that read light reflected from a document surface.
- a contact-type image sensor (hereinafter abbreviated as CIS) is used as one of image reading means for reading reflected light from a document surface.
- This contact type image sensor has a light source for irradiating a document, receives reflected light passing through a lens, and converts the reflected light into an electric image at a light receiving unit formed by a photoelectric conversion element.
- a technology has been disclosed in which two systems of lighting devices are opposed to each other with a lens array therebetween to increase the amount of irradiation (see, for example, Patent Document 1 (Japanese Patent Application Laid-Open No. 2002-575853). Gazette))).
- the contact image sensor unit (CIS unit) is used by being attached below a transparent document support that supports the document.
- CIS unit The contact image sensor unit
- a sheet feed type in which the sensor unit is fixed to the image reading device and the original on the original support is moved and read.
- FIG. 8 is a cross-sectional view showing a configuration of a conventional CIS unit.
- a frame 11 supports light sources 15a and 15b on which LEDs for illuminating a document are mounted, and lighting devices 16a and 16b.
- Lighting devices 16a and 16b are light sources 15a and 1 respectively.
- the light guide is configured to take in the light emitted from 5b and emit the light so that the amount of illumination is substantially uniform over the length of one line of the document reading unit.
- a sensor substrate 14 having a linear sensor array 13 provided with a plurality of light receiving units for photoelectrically converting an optical image of a document into an electric signal is mounted below the frame 11.
- a lens array 12 that forms an optical image of the original on the sensor array 13.
- a connector 17 for connecting the sensor array 13 to an external device is attached below the sensor board 14.
- Such a conventional CIS unit is used by being attached below the document support 18 as described above.
- this CIS unit in order to increase the amount of light of the illuminating device that illuminates the original, two illumination systems including a light source and an illuminating device are provided, and these are opposed to symmetric positions with the lens array 12 interposed therebetween. It is arranged in such a way.
- a light-collecting function is provided in the light-emitting portions of the lighting devices 16a and 16b, and the light use efficiency is improved.
- the document-side focal point A of the lens array 12 is slightly floating from the document-side surface position of the document support 18, and the light from the two illumination systems is collected at a position distant from the lens array 12. Let me. That is, the depth of field of the lens array 12 is increased.
- the sheet-feed type image reading apparatus it is possible to prevent the contact friction between the document and the document support from becoming excessive due to an increase in the paper passing speed. Further, in a flatbed type image reading apparatus, an original having irregularities on its surface can be easily read.
- Patent Document 1 discloses that, by floating the peak position of the illuminating light from the light source slightly from the focal point on the original side of the lens array, reading is performed with a stable light amount even when the original paper floats from the original support. A configuration has been proposed.
- the amount of light illuminating the document can be increased, and at the same time, the occurrence of shadows corresponding to surface conditions such as unevenness on the document can be reduced.
- the quality of the read image is improved.
- Patent Document 1 the amount of light for illuminating a document by using a plurality of lighting devices is increased. In doing so, the light amounts are increased by aligning the focal positions of the two light sources.
- the distribution of the combined amount of illumination light becomes sharp, and the following side effects occur.
- FIG. 9 is a cross-sectional view showing a conventional high-speed sheet feed type image reading apparatus using a CIS unit.
- a pressure plate 27 is provided so as to face the document support 18, and the space between the document support 18 and the pressure plate 27 serves as a paper transport path 28.
- An original transport roller 25 is provided so as to sandwich the paper transport path 28, and the original 26 is transported in the paper transport path 28 by the original transport roller 25.
- the height of the pressure plate 27 is set so that the document side focal point A is located at the center of the paper transport path 28.
- the original 26 passes through the paper transport path 28, the original 26 is moved with respect to the optical axis direction of the lens array 12.
- the position fluctuates in both the near and far directions (the optical axis direction of the lens array 12) with respect to the original focal point A.
- the width P of the paper transport path 28 means the maximum width at which the position of the document 26 fluctuates due to swinging.
- the original-side focal point A of the lens array 12 is set to the original support 1 so that the original having the uneven surface can be easily read. 8 is set above the original-side surface position. For this reason, when the position of the document fluctuates in the optical axis direction of the lens array 12, density fluctuation is likely to occur.
- the allowable range of the light quantity fluctuation of the illumination light be within 10% within the range of the depth of field of the lens.
- Patent Document 2 Japanese Patent No. 28484857
- two systems of light sources are arranged, and the irradiation position of each light source is shifted vertically on the optical axis of the light receiving element. It is described that the illuminance on the document surface is made substantially constant within the range of the depth of field of the image means. In such a configuration, the distribution of the combined light quantity is flattened, and even if the original is misaligned, the fluctuation of the read light quantity is suppressed.
- Patent Document 1 Japanese Patent Application Laid-Open No. 200-577853
- Patent Literature 2 Japanese Patent No. 28848477 Disclosure of the Invention
- the present invention has been made in view of the above circumstances, and an image sensor unit and an image reading apparatus capable of suppressing a change in a reading light amount due to a change in the height of a document while obtaining a high irradiation light amount.
- the purpose is to provide.
- An image sensor unit includes a first and a second illuminating device that illuminates a document, an image forming unit that forms an image of reflected light from the document, and a plurality of pixels that convert the reflected light into an electric signal.
- An image sensor unit comprising: a sensor array provided with the first and second illumination devices, wherein the first and second illumination devices are disposed on both sides of the imaging unit so as to face each other, and the effective coverage of the imaging unit is Assuming that the depth of field is a, the 90% value widths of the light intensity distribution curves of the respective illumination devices along the optical axis of the imaging unit are all equal to or greater than a, and the light emitted from the first illumination device is light.
- a first intersection point between an axis and an optical axis of the image forming unit is located closer to the image forming unit than a document-side focal point of the image forming unit, and light emitted from the second illumination device is
- the second intersection between the axis and the optical axis of the image forming means is located on the original side of the image forming means. It is located farther from the image forming means than the focal point, and the distance between the first and second intersections and the document-side focal point is both 2 or less.
- the fluctuation of the combined light amount along the optical axis of the imaging unit is suppressed.
- the size of the shift and the light amount distribution curve of each lighting device are appropriately specified, the light amount fluctuation within the effective depth of field a of the imaging means is within 10%, and the synthesis is performed.
- the peak value of the light amount is more than 180% of that when there is one lighting device. Accordingly, a high irradiation light amount can be obtained, and a change in the reading light amount due to a change in the height of the document is suppressed.
- FIG. 1 is a cross-sectional view illustrating a configuration of a CI unit according to the first embodiment of the present invention.
- FIG. 2 is a schematic view showing the optical axis and the 90% value width of the light amount distribution curve of the illumination device 5.
- FIG. 3 is a graph showing the relationship between the height dL from the surface of the document support 18 and various relative light amounts.
- FIG. 4 is a graph showing the relationship between the height dL from the surface of the document support 18 and the relative light amount with reference to the irradiation light amount of one irradiation device.
- FIG. 5 is a cross-sectional view illustrating a configuration of the CI unit according to the second embodiment of the present invention.
- FIG. 6 is a cross-sectional view illustrating a configuration of a CI unit according to the third embodiment of the present invention.
- FIG. 7 is a perspective view showing the appearance of a flatbed image scanner according to a fourth embodiment of the present invention.
- FIG. 8 is a cross-sectional view showing a configuration of a conventional CIS unit.
- FIG. 9 is a cross-sectional view showing a conventional high-speed sheet feed type image reading apparatus using a CIS unit.
- FIG. 10 is a schematic diagram showing the configuration (prior art) described in Patent Document 2.
- FIG. 11 is a graph showing a light amount distribution curve obtained by the configuration shown in FIG. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 is a sectional view showing a configuration of a CIS unit according to the first embodiment of the present invention.
- the illuminating devices 5 and 6 for illuminating the original are supported on the frame 1.
- a sensor board 4 having a sensor array 3 having a plurality of light receiving units for photoelectrically converting an optical image of the original into an electric signal is mounted below the frame 1.
- a frame 1 has an optical image of the original.
- a lens array (imaging means) 2 that forms an image on the sensor array 3 is also supported.
- the sensor array 3 is located at the focal point of the lens array 2 on the sensor side.
- a connector 7 for connecting the sensor array 3 and an external device is attached below the sensor 1 substrate 4.
- the lighting devices 5 and 6 are provided with LEDs (not shown) as light sources.
- the lighting devices 5 and 6 are arranged to face each other with the lens array 2 interposed therebetween.
- the horizontal distance x1 between the optical axis Z1 of the lens array 2 and the base point 5a of the optical axis Z2 of the lighting device 5 is the horizontal distance between the optical axis Z1 and the base point 6a of the optical axis Z3 of the lighting device 6.
- the illuminating device 5 is arranged such that the intersection B between the optical axis Z2 and the optical axis Z1 is closer to the lens array 2 than the original focal point A of the lens array 2.
- the illuminating device 6 is arranged so that the intersection C between the optical axis Z 3 and the optical axis Z 1 is farther from the lens array 2 than the original-side focal point A of the lens array 2.
- the lighting devices 5 and 6 are arranged such that the distance between the focal point A and the intersection point B and the distance between the focal point A and the intersection point C are substantially equal to each other. Further, assuming that the effective depth of field of the lens array 2 is a, the distance between the focal point A and the intersection point B and the distance between the focal point A and the intersection point C are both a / 2 or less.
- the 90% value widths of the light intensity distribution curves of the illumination devices 5 and 6 along the optical axis of the lens array 2 are all a or more.
- the optical axis and the 90% value width of the light amount distribution curve of the illumination device 5 will be described with reference to FIG.
- the optical axis Z 1 of the lens array 2 refers to a straight line connecting the focal point A on the original side of the lens array 2 and the focal point D on one side of the sensor.
- the optical axis Z2 of the lighting device 5 is also the optical axis of the light emitted from the lighting device 5, and as shown in FIG. 2, the height of the document surface O from the document support (not shown) is adjusted.
- the sensor array 3 is arranged at the sensor one-side focal point D.
- the 90% value width of the light intensity distribution curve of the lighting device 5 is defined as the intersection (read point) between the optical axis Z1 and the original surface O when the original surface O is moved along the optical axis Z1 of the lens array 2.
- this refers to the width W of the movement range of the document surface where the illumination light intensity is 90% or more of the peak value.
- Such a CIS unit is used by being attached below a transparent document support 8 that supports a document.
- the illumination light amounts from the illuminating devices 5 and 6 are substantially equal to each other, and the sum of these is equal to the original. Irradiated.
- the present embodiment it is possible to reduce the density fluctuation occurring in the output image of the image reading device.
- the effective depth of field a of the lens array 2 is ⁇ 0.3 mm
- the position fluctuation width P during paper conveyance is 0.6 mm
- the focal point A of the lens array 2 on the original side is Was set at a point 0.3 mm away from the surface of the document support 18.
- the position of the original in the optical axis direction of the lens array 2 fluctuates up to ⁇ 0.3 mm with respect to the focal point A on the original. Therefore, it is required that the variation of the illumination light amount distribution be small in this range.
- the distance X1 between the optical axis Z1 and the base point 5a in the lighting device 5 is smaller than the distance X2 between the optical axis Z1 and the base point 6a in the lighting device 6 by about 0.3 mm.
- FIG. 3 shows the depth-of-field characteristics (illumination depth characteristics) of the sheet-feed image reading device (Example) manufactured as described above and the sheet-feed image reading device (conventional example) employing the structure shown in FIG. ).
- FIG. 3 is a graph showing the relationship between the height dL from the surface of the document support 18 and various relative light amounts.
- the position fluctuation width P of the document is ⁇ 0. Within the range of 3 mm, about 5% light intensity fluctuation occurred.
- the light intensity variation was extremely small at about 2%.
- the light amount distribution of the embodiment is obtained from the synthesis of the relative light amount distribution by the lighting device 5 and the relative light amount distribution by the lighting device 6.
- the relative light amount shown in FIG. 3 is the distribution of the amount of illumination light from the illumination device 5, the distribution of the amount of illumination light from the illumination device 6, the light amount distribution obtained in the embodiment, and the light amount distribution obtained in the conventional example. Are relative light amounts with respect to the maximum light amount.
- FIG. 4 is a graph showing the relationship between the height dL from the surface of the document support 18 and the relative light amount with reference to the irradiation light amount of one irradiation device.
- the focal positions of the two illumination devices are matched, the peak light amount of the light amount distribution obtained by combining them is as large as 2.0, but the sharpness of the light amount distribution is large. As a result, the amount of light fluctuated rapidly due to the displacement of the document.
- the peak light amount (1.91) is slightly smaller than the conventional example, the sharpness of the light amount distribution curve is small, and the change in the light amount within the depth of field of the lens array 2 is significantly reduced. I was In other words, even if the original is misaligned, the fluctuation of the light amount is small. Therefore, the error in the amount of reading light is also reduced. If the peak light quantity is 1.9, reading at a sufficiently high speed is possible.
- the magnitude of the deviation between the document-side focal point A and the intersection points B and C is set to a Z 2 or less, and the distance from the illumination devices 5 and 6 is reduced. Since the 90% value width of the light amount distribution curve of each irradiation light is set to a or more, if the peak light amount of each irradiation light from the illuminating devices 5 and 6 is 1, the peak light amount of the light irradiated to the original is at least 1. It becomes 8. Therefore, a sufficient amount of light can be obtained and high-speed reading can be performed.
- the irradiation light from the lighting device 5 and the irradiation light from the lighting device 6 are different from each other. There is a concern that sufficient peak light intensity may not be obtained even if
- the magnitude of the deviation be within az 2 or less, but the same effect can be obtained even if the deviation fluctuates within this range. Can be. That is, in the first embodiment, not only the intersections B and C are shifted from the document-side focal point A of the lens array 2, but also the magnitude of the shift and the light amount distribution of the irradiation light from the illumination devices 5 and 6. Since the curve is appropriately defined, a gentle light amount distribution curve can be obtained while securing a sufficient combined light amount.
- FIG. 5 is a cross-sectional view illustrating a configuration of a CIS unit according to the second embodiment of the present invention.
- the same components as those of the first embodiment shown in FIG. 1 are denoted by the same reference numerals.
- the height h1 of the base point 5a from the surface of the sensor array 3 is lower than the height h2 of the base point 6a from the surface of the sensor array 3.
- the illuminating device 5 is arranged so that the intersection B between the optical axis Z2 and the optical axis Z1 is closer to the lens array 2 than the document-side focal point A of the lens array 2; 6 is arranged such that the intersection C between the optical axis Z 3 and the optical axis Z 1 is farther from the lens array 2 than the original-side focal point A of the lens array 2.
- the illuminating devices 5 and 6 are arranged so that the distance between the focal point A and the intersection point B and the distance between the focal point A and the intersection point C are substantially equal to each other. Further, assuming that the effective depth of field of the lens array 2 is a, the distance between the focal point A and the intersection point B and the distance between the focal point A and the intersection point C are both a / 2 or less.
- FIG. 6 is a cross-sectional view illustrating a configuration of a CI unit according to the third embodiment of the present invention.
- the same components as those of the first embodiment shown in FIG. 1 are denoted by the same reference numerals.
- the distance between the optical axis Z1 and the base points 5a and 5b is the same, and the height of the base points 5a and 5b from the surface of the sensor-array 3 is also the same, but the frame 1
- the portion supporting the lighting device 5 of the frame 1 is inclined inward, and the portion of the frame 1 supporting the lighting device 6 is inclined outward. Therefore, as compared with the first embodiment, the illumination devices 5 and 6 are rotated in the clockwise direction, and the optical axes Z2 and Z3 of the illumination light from them are also shifted. It is rotated in the direction of rotation of the meter.
- the angle formed by the optical axis Z2 and the optical axis Z1 is different from the angle formed by the optical axis Z3 and the optical axis Z1.
- the illuminating device 5 is arranged such that the intersection B between the optical axis Z 2 and the optical axis Z 1 is closer to the lens array 2 than the document side focal point A of the lens array 2.
- the device 6 is arranged so that the intersection C between the optical axis Z3 and the optical axis Z1 is farther from the lens array 2 than the original focal point A of the lens array 2.
- the illuminating devices 5 and 6 are arranged so that the distance between the focal point A and the intersection point B and the distance between the focal point A and the intersection point C are substantially equal to each other. Furthermore, assuming that the effective depth of field of the lens array 2 is a, the distance between the focal point A and the intersection point B and the distance between the focal point A and the intersection point C are both 2 or less.
- FIG. 7 is a perspective view showing an appearance of a flatbed image scanner according to a fourth embodiment of the present invention.
- a CIS unit 71 is housed inside a housing 72, and a drive motor 74 and a wire 75 for moving the CIS unit 71 are provided inside the housing 72. ing.
- a glass plate 76 is attached to the upper surface of the housing 72 as a document support.
- a document pressure plate 77 is attached to an end of the housing 72 so as to be openable and closable.
- the CIS unit 71 moves in the reading direction (scanning direction) and Images can be read.
- the CIS unit 71 is configured as a sensor unit in which the illumination unit is integrated, and the reflected light from the document illuminated with light is transmitted to the photoelectric conversion element by the lens array (not shown) in the CIS unit 71. It is collected and output as image information for each scan line. In this way, it is possible to read and output sheet-like image information.
- the image scanner according to the fourth embodiment includes a CIS unit 71. Therefore, it is hard to be affected by the position fluctuation and unevenness of the original paper, and stable image information can be output.
- the density distribution of the read image obtained by this image scanner was significantly improved as compared with the conventional one.
- good read images were obtained even when the original had irregularities.
- good images can be obtained even if the scanning speed of the scanner is increased about twice that of the conventional scanner.
- FIG. 10 is a schematic diagram showing the configuration described in Patent Document 2.
- FIG. 11 is a graph showing a light amount distribution curve obtained by the configuration shown in FIG.
- the illuminating devices 16a and 16b have the half-width of the light intensity distribution curve of the illuminating light as the object of the lens array 12
- Illumination equipment 16 a is used so that the optical axis of the illuminating light from each illumination equipment is shifted from the focal point A by a Z 2 in the direction parallel to the optical axis of the lens array 12, while using one that matches the depth of field a.
- the height of 16 b were determined.
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimile Scanning Arrangements (AREA)
- Facsimile Heads (AREA)
- Image Input (AREA)
- Light Sources And Details Of Projection-Printing Devices (AREA)
Abstract
Description
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Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2003/015147 WO2005053307A1 (ja) | 2003-11-27 | 2003-11-27 | イメージセンサーユニット及び画像読取装置 |
AU2003304671A AU2003304671A1 (en) | 2003-11-27 | 2003-11-27 | Image sensor unit and image reader |
CNB2003801006170A CN100409656C (zh) | 2003-11-27 | 2003-11-27 | 图像传感器单元以及图像读取装置 |
JP2005510912A JP3885088B2 (ja) | 2003-11-27 | 2003-11-27 | イメージセンサーユニット及び画像読取装置 |
TW093136588A TWI250782B (en) | 2003-11-27 | 2004-11-26 | Image sensor unit and image reader |
Applications Claiming Priority (1)
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PCT/JP2003/015147 WO2005053307A1 (ja) | 2003-11-27 | 2003-11-27 | イメージセンサーユニット及び画像読取装置 |
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WO2005053307A1 true WO2005053307A1 (ja) | 2005-06-09 |
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PCT/JP2003/015147 WO2005053307A1 (ja) | 2003-11-27 | 2003-11-27 | イメージセンサーユニット及び画像読取装置 |
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JP (1) | JP3885088B2 (ja) |
CN (1) | CN100409656C (ja) |
AU (1) | AU2003304671A1 (ja) |
TW (1) | TWI250782B (ja) |
WO (1) | WO2005053307A1 (ja) |
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US8390901B2 (en) | 2009-02-02 | 2013-03-05 | Brother Kogyo Kabushiki Kaisha | Image reading apparatus |
JP2019127022A (ja) * | 2018-01-26 | 2019-08-01 | 株式会社リコー | 検査装置、画像読取装置、画像形成装置および検査装置における濃度補正方法 |
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JP2010109652A (ja) | 2008-10-30 | 2010-05-13 | Pfu Ltd | 照明装置及び画像読取装置 |
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JP5244952B2 (ja) | 2010-12-21 | 2013-07-24 | キヤノン・コンポーネンツ株式会社 | イメージセンサユニット、及び、画像読取装置 |
JP5384471B2 (ja) | 2010-12-28 | 2014-01-08 | キヤノン・コンポーネンツ株式会社 | イメージセンサユニット、及び、画像読取装置 |
JP5400188B2 (ja) | 2011-05-11 | 2014-01-29 | キヤノン・コンポーネンツ株式会社 | イメージセンサユニットおよびそれを用いた画像読取装置、画像形成装置 |
JP5384707B2 (ja) | 2011-08-09 | 2014-01-08 | キヤノン・コンポーネンツ株式会社 | イメージセンサユニット及びこれを用いた画像読取装置 |
JP5536150B2 (ja) | 2011-08-09 | 2014-07-02 | キヤノン・コンポーネンツ株式会社 | イメージセンサユニット及び画像読取装置 |
JP5518953B2 (ja) | 2011-08-09 | 2014-06-11 | キヤノン・コンポーネンツ株式会社 | イメージセンサユニットおよび画像読取装置 |
JP6838994B2 (ja) * | 2017-02-22 | 2021-03-03 | キヤノン株式会社 | 撮像装置、撮像装置の制御方法およびプログラム |
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JPH03129965A (ja) * | 1989-10-14 | 1991-06-03 | Fuji Xerox Co Ltd | 画像読取装置の照明装置 |
JPH0622087A (ja) * | 1992-07-03 | 1994-01-28 | Ushio Inc | 原稿照明装置 |
JPH0662184A (ja) * | 1992-08-05 | 1994-03-04 | Oki Electric Ind Co Ltd | 光学式読み取り装置 |
JPH08279885A (ja) * | 1995-04-04 | 1996-10-22 | Sankyo Seiki Mfg Co Ltd | イメージスキャナの照明装置 |
Family Cites Families (1)
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US6178012B1 (en) * | 1998-07-16 | 2001-01-23 | Silitek Corporation | Method and apparatus for keeping a document in focus during noncontact scanning |
-
2003
- 2003-11-27 JP JP2005510912A patent/JP3885088B2/ja not_active Expired - Fee Related
- 2003-11-27 CN CNB2003801006170A patent/CN100409656C/zh not_active Expired - Fee Related
- 2003-11-27 AU AU2003304671A patent/AU2003304671A1/en not_active Abandoned
- 2003-11-27 WO PCT/JP2003/015147 patent/WO2005053307A1/ja active Application Filing
-
2004
- 2004-11-26 TW TW093136588A patent/TWI250782B/zh not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03129965A (ja) * | 1989-10-14 | 1991-06-03 | Fuji Xerox Co Ltd | 画像読取装置の照明装置 |
JPH0622087A (ja) * | 1992-07-03 | 1994-01-28 | Ushio Inc | 原稿照明装置 |
JPH0662184A (ja) * | 1992-08-05 | 1994-03-04 | Oki Electric Ind Co Ltd | 光学式読み取り装置 |
JPH08279885A (ja) * | 1995-04-04 | 1996-10-22 | Sankyo Seiki Mfg Co Ltd | イメージスキャナの照明装置 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8390901B2 (en) | 2009-02-02 | 2013-03-05 | Brother Kogyo Kabushiki Kaisha | Image reading apparatus |
JP2019127022A (ja) * | 2018-01-26 | 2019-08-01 | 株式会社リコー | 検査装置、画像読取装置、画像形成装置および検査装置における濃度補正方法 |
JP7040055B2 (ja) | 2018-01-26 | 2022-03-23 | 株式会社リコー | 検査装置、画像読取装置、画像形成装置および検査装置における濃度補正方法 |
Also Published As
Publication number | Publication date |
---|---|
AU2003304671A1 (en) | 2005-06-17 |
CN1726695A (zh) | 2006-01-25 |
TW200526010A (en) | 2005-08-01 |
TWI250782B (en) | 2006-03-01 |
CN100409656C (zh) | 2008-08-06 |
JP3885088B2 (ja) | 2007-02-21 |
JPWO2005053307A1 (ja) | 2007-06-21 |
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