USRE41818E1 - Installation for improving a scanning range of scanner along an axial direction of a light source - Google Patents
Installation for improving a scanning range of scanner along an axial direction of a light source Download PDFInfo
- Publication number
- USRE41818E1 USRE41818E1 US11/293,787 US29378705A USRE41818E US RE41818 E1 USRE41818 E1 US RE41818E1 US 29378705 A US29378705 A US 29378705A US RE41818 E USRE41818 E US RE41818E
- Authority
- US
- United States
- Prior art keywords
- light
- light source
- linear
- axis
- panel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000009434 installation Methods 0.000 title claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 17
- 230000003287 optical effect Effects 0.000 claims description 27
- 230000005540 biological transmission Effects 0.000 claims description 9
- 239000012141 concentrate Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 2
- 238000005286 illumination Methods 0.000 claims 3
- 239000011521 glass Substances 0.000 description 6
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000002310 reflectometry Methods 0.000 description 2
- 230000001447 compensatory effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
Images
Classifications
-
- 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
-
- 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
-
- 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
- H04N1/0285—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 at least one reflector which is in fixed relation to the light source
-
- 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
- H04N1/0287—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 using a tubular lamp or a combination of such lamps
-
- 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
- H04N1/02885—Means for compensating spatially uneven illumination, e.g. an aperture arrangement
-
- 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
Definitions
- the present invention relates to the light source of a scanner. More particularly, the present invention relates to an installation for improving a scanning range of a scanner along an axial direction of a light source.
- a scanning system can be roughly classified as a reflective type or a light-penetrating type.
- a document is placed over a transparent glass panel.
- Light from a light source travels through the transparent glass panel and impinges upon the document.
- the light is reflected back from the document to reach an optical sensor after passing through a set of optical elements.
- the optical sensor for forming a scan image for example, can be a charge couple device (CCD).
- CCD charge couple device
- the document is also placed on top of a transparent glass panel. However, light from a light source has to pass through the document, the transparent glass panel and a set of optical elements before arriving at the optical sensor.
- both the reflective and the transparent type of scanning system operate on similar principles.
- a reflective scanning system brightness variation of reflected light from a document is gauged to produce a scan image.
- a transparency scanning system brightness variation of light after passing through the document is gauged to produce a scan image.
- the conventional linear light source of a scanner has one major drawback.
- Brightness level close to the mid-section along the axial direction of a light source is higher than the brightness level on each side. Hence, image produced by the light source is brighter in the middle. Since a scanner works according to differences in brightness level, capacity for detecting brightness contrast near both ends of the light axis is lower. If the variation in brightness level along the axial direction of the light source is large, a section close to both ends of the light axis is unsuitable for forming any images.
- Taiwan Patent No. 204363 titled ‘Image-forming optical system for a scanner’ the external structure of the lamp tube is directly modified.
- two lamp tubes are used instead of one so that compensatory back reflection is increased. Consequently, brightness levels between the central and the side portions along the axial direction of the lamp tubes are almost identical when onto a document.
- the invention demands major modifications of many structural elements. Hence, cost of production is high.
- Taiwan Patent No. 352886 titled ‘A lens structure and its integration with an image-reading device’ a method of improving brightness level along the axial direction of a light source is proposed.
- brightness level variation is reduced.
- the reflectivities of more than one reflecting lens need to be modified, thereby increasing the production cost necessary to achieve the results.
- one object of the present invention is to modify a component in a scanner so that the useful range along the axial direction of a light source is increased.
- the component is a light-channeling panel and the modification is a variation of light transparency across the surface of the light-channeling panel.
- the invention provides an installation for increasing the useful range along the axial direction of a light source.
- the installation includes a linear light source and a light-channeling panel.
- the linear light source has a light axis whose brightness near the mid-portion is higher than the brightness level on either side.
- the light source provides a necessary beam of light for image scanning by the scanner.
- the light-channeling panel is adjacent to the linear light source and is capable of concentrating more light to the end sections rather than the mid-portion of the light axis.
- the light-channeling panel is made from a plurality of panels, each being made from a panel material having a light transparency different from the others.
- the light transparency of the light-channeling panel near the central section of the light axis is lower than the light transparency at the end sections of the light axis.
- This invention also provides a second installation for increasing the useful range along the axial direction of a light source, which installation includes a linear light source, a light-channeling panel, an optical transmission system and an optical sensor.
- the linear light source has a light axis whose brightness level near the middle portion is higher than the brightness level on each side.
- the light source provides a necessary beam of light for scanning a document by the scanner.
- the light-channeling panel is adjacent to the linear light source and is capable of concentrating more light in the end sections rather than the middle of the light axis.
- the light-channeling panel is formed by attaching a plurality of panels with each panel made from a material having a different light transparency.
- the light transparency of the light-channeling panel near the central section of the light axis is lower than the light transparency at the end sections of the light axis. Hence, after light from the linear light source passes through the light-channeling panel, a band of light having a more homogenous brightness level than the linear light source is produced.
- the optical transmission system transmits the light that has passed through the document or the light that has reflected from the document.
- the optical sensor picks up the light from the optical transmission system for producing a scan image.
- This invention also provides a third installation for increasing the useful range along the axial direction of a light source that includes a linear light source, a light-channeling panel and a contact image sensor (CIS).
- the linear light source has a light axis whose brightness level near the middle portion is higher than the brightness level on each side.
- the light source provides a necessary beam of light for scanning a document by the scanner.
- the light-channeling panel is adjacent to the linear light source and is capable of concentrating more light near the end of the light axis.
- the light-channeling panel is formed by attaching a plurality of panels, each panel being made from a panel material having a light transparency different from the others.
- the light transparency of the light-channeling panel near the central section of the light axis is lower than the light transparency at the end sections of the light axis. Hence, after light from the linear light source passes through the light-channeling panel, a band of light having more homogenous brightness level than the linear light source is produced.
- the contact image sensor picks up the light that has passed through the document or the light that has reflected from the document for producing a scan image.
- this invention homogenizes the brightness level along the light axis by changing the light transparency across the surface of the light-channeling panel.
- FIG. 1 is a schematic view of a scanning system capable of producing a more uniform brightness level along axial direction of a light source according to a first preferred embodiment of this invention
- FIG. 2 is a side view of a surface of the light-channeling panel shown in FIG. 1 ;
- FIG. 3 is a schematic view of a scanning system capable of producing a more uniform brightness level along axial direction of a light source according to a second preferred embodiment of this invention
- FIG. 4 is a cross-sectional view along line IV—IV of FIG. 3 ;
- FIG. 5 is a side view of the light-channel panel of FIG. 3 ;
- FIG. 6a is a graph showing the variation in light transparency of the light-channeling panel along the light axis of the light source
- FIG. 6b is a graph showing the variation in brightness level of the light source along the light axis of the light source
- FIG. 6c is a graph showing the variation of brightness level of light along the light axis of the light source after a beam of light from the light source has passed through the light-channeling panel.
- FIG. 7 is a schematic view of a scanning system capable of producing a more uniform brightness level along the axial direction of a light source according to a third preferred embodiment of this invention.
- FIG. 1 is a schematic view of a scanning system capable of producing a more uniform brightness level along an axial direction of a light source according to a first preferred embodiment of this invention.
- the scanning system includes a linear light source 10 , a transparent glass panel 15 , a light reflector 20 , a light-channeling panel 23 , a document 25 , a plurality of reflecting mirrors 30 , a lens 35 and an optical sensor 40 .
- the linear light source 10 has a light axis perpendicular to the plane of the page on which FIG. 1 lies and provides the necessary light beam for scanning the document 25 .
- the reflector 20 is positioned on one side of the linear light source 10 for reflecting light from the linear light source 10 to the light-channel panel 23 .
- the light-channel panel 23 concentrates more light in the end sections rather than the mid-portion of the light axis.
- the reflecting mirrors 30 together pick up light reflected from the document 25 and transmit the same to the lens 35 .
- the optical sensor 40 is a device for receiving the optical image from the lens 35 so that a scan image can be produced.
- the linear light source 10 has a light axis whose brightness level near the middle portion is higher than the brightness level on either side.
- the light-channeling panel 23 is formed by joining a plurality of panels with each panel being made from a material having a light transparency different from the others.
- the light transparency of the light-channeling panel near the central section of the light axis is lower than the light transparency near the end sections of the light axis.
- FIG. 2 is a side view showing the inner surface 100 of the light-channeling panel 23 that faces the linear light source 10 .
- the light-channeling panel 23 is actually formed using three panels 100 a, 100 b and 100 c with each panel being made from a panel material having a light transparency different from the others. Light transparency of panel 100 a is lower than the light transparency of panels 100 b and 100 c.
- panels made of three different panel materials having three different light transparencies are used on the inner surface 100 of the light-channeling panel 23 .
- FIG. 6a is a graph showing the variation of light transparency of the light-channeling panel along the light axis of the light source. As shown in FIG. 6a , light transparency is low near the middle section of the light axis while light transparency is high near the ends of the light axis. As shown in FIG. 2 , the low light transparency region corresponds to a surface having the panel 100 a while the high transparency regions on each side correspond to surface having the panels 10 b and 100 c, respectively.
- FIG. 6b is a graph showing the variation of brightness level of the linear light source along the light axis of the light source.
- FIG. 6c is a graph showing the variation of brightness level of light along the light axis of the light source after a beam of light from the light source has passed through the light-channeling panel. As shown in FIGS. 6b and 6c , the uniformly bright region along the light axis for light emerging from the light-channeling panel 23 is wider than the uniformly bright region of the original light source 10 .
- the useful range in the light axis is increased when identical length light tubes are used.
- length of light tube can be reduced when identical range of light axis is specified.
- FIG. 3 is a schematic view of a scanning system capable of producing a more uniform brightness level along axial direction of a light source according to a second preferred embodiment of this invention.
- the installation includes two linear light sources 50 , a lamp shade 55 , a light-channeling panel 60 , a reflector 65 , a document 70 , a transparent glass panel 75 , a reflecting mirror 80 , a lens 85 and an optical sensor 90 .
- the two linear light sources 50 have parallel light axes perpendicular to the plane of the page on which FIG. 3 lies and provide the necessary light beam for scanning the document 70 .
- the light-channeling panel 60 is positioned between the two linear light sources 50 .
- the light-channeling panel 60 and the reflector 65 are employed to smooth out the light produced by the two linear light sources 50 along a light axes.
- the reflecting mirror 80 reflects the light from the linear light sources 50 via the reflector 65 , the light-channeling panel 60 and the document 70 to the lens 85 .
- the image on the lens 85 is transmitted to the optical sensor 90 where a scan image is formed.
- the linear light sources 50 together produce a light axis whose brightness level near the middle portion is higher than the brightness level on each side.
- the light-channeling panel 60 is formed by joining together a plurality of panels, each panel being made from a panel material having a light transparency different from the others.
- the light transparency of the light-channeling panel 60 near the central section of the light axis is lower than the light transparency near the end sections of the light axis.
- FIG. 4 is a cross-sectional view along line IV—IV of FIG. 3 .
- the first surface 200 of the light-channel panel 60 is formed using different panel materials, each having a different light transparency.
- the light transparency near the mid-portion of the light axis is lower than the light transparency near either ends of the light axis.
- Light generated by the linear light sources 50 is reflected between the reflector 65 and the light-channeling panel 60 many times before emerging from the first surface 200 of the light-channeling panel 60 . Since more light is allowed to pass through the end sections of the panel 60 , brightness level along the light axis is more homogenous.
- FIG. 5 is a side view showing the first surface 200 of the light-channel panel 60 shown in FIG. 3 .
- the surface 200 of the light-channeling panel 60 is formed using five panels 200 a, 200 b, 200 c, 200 d and 200 e with each panel being made from a panel material having a different light transparency.
- Light transparency of panel 200 a is lower than the light transparency of panels 200 b and 200 c.
- panel 200 b has a light transparency lower than the panel 200 d
- the panel 200 c has a light transparency lower than the panel 200 e.
- five different panel materials are used on the first surface 200 of the light-channeling panel 60 .
- FIG. 6a is a graph showing the variation of light transparency of the light-channeling panel along the light axis of the light source. As shown in FIG. 6a , light transparency is low near the middle section of the light axis while light transparency is high near the ends of the light axis. As shown in FIG. 5 , the lowest light transparency region corresponds to the surface having the panel 200 a. The higher transparency regions further out on either side correspond to surfaces having the panels 200 b and 200 c, respectively. Finally, the highest transparency regions are the furthest away from the center corresponding to the panels 200 d and 200 e, respectively.
- FIG. 6b is a graph showing the variation of brightness level of the linear light source along the light axis of the light source.
- FIG. 6c is a graph showing the variation of brightness level of light along the light axis of the light source after a beam of light from the light source has passed through the light-channeling panel. As shown in FIGS. 6b and 6c , the uniformly bright region along the light axis for light emerging from the light-channeling panel 60 has a width greater than the light emerging from the original light sources 50 .
- FIG. 7 is a schematic view of a scanning system capable of producing a more uniform brightness level along an axial direction of a light source according to a third preferred embodiment of this invention.
- the two linear light sources 50 have parallel light axes perpendicular to the page on which FIG. 7 lies and provide the necessary light beam for scanning the document 70 .
- the light-channeling panel 60 is positioned between the two linear light sources 50 .
- the light-channeling panel 60 and the reflector 65 are employed to even out the light produced by the two linear light sources 50 along a light axes.
- the CIS 95 picks up light from the linear light sources 50 after reflecting from the reflector 65 and passing through the light-channeling panel 60 and the document 70 . Ultimately, a scan image is formed on CIS 95 . Using a CIS, many reflecting mirrors in an optical transmission system are saved.
- this invention improves the equally bright zone along the light axis of a scanner by varying the light transparency across the surface of a light-channeling panel. Since light transparency across the surface of a light-channeling panel can be modified more readily than other optical components, production cost is lowered. Moreover, as the useful range in the light axis is increased, length of light tube can be reduced for a specified working range. Hence, the volume of a scanner is reduced.
Abstract
Description
Claims (17)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/293,787 USRE41818E1 (en) | 1999-12-18 | 2005-12-02 | Installation for improving a scanning range of scanner along an axial direction of a light source |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW088222560U TW446257U (en) | 1999-12-18 | 1999-12-18 | Improved device of the light source of scanner for the usable range in the axial direction |
TW88222560U | 1999-12-18 | ||
US09/535,500 US6657752B1 (en) | 1999-12-18 | 2000-03-24 | Installation for improving a scanning range of scanner along an axial direction of a light source |
US11/293,787 USRE41818E1 (en) | 1999-12-18 | 2005-12-02 | Installation for improving a scanning range of scanner along an axial direction of a light source |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/535,500 Reissue US6657752B1 (en) | 1999-12-18 | 2000-03-24 | Installation for improving a scanning range of scanner along an axial direction of a light source |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE41818E1 true USRE41818E1 (en) | 2010-10-12 |
Family
ID=21658255
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/535,500 Ceased US6657752B1 (en) | 1999-12-18 | 2000-03-24 | Installation for improving a scanning range of scanner along an axial direction of a light source |
US11/293,787 Expired - Lifetime USRE41818E1 (en) | 1999-12-18 | 2005-12-02 | Installation for improving a scanning range of scanner along an axial direction of a light source |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/535,500 Ceased US6657752B1 (en) | 1999-12-18 | 2000-03-24 | Installation for improving a scanning range of scanner along an axial direction of a light source |
Country Status (2)
Country | Link |
---|---|
US (2) | US6657752B1 (en) |
TW (1) | TW446257U (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI282687B (en) * | 2003-05-20 | 2007-06-11 | Benq Corp | Scanner that can generate uniform light |
US10781680B2 (en) * | 2017-02-08 | 2020-09-22 | Gas Technology Institute | Detection and quantification of proppant for optimized fracture treatment design in in-fill and new wells |
Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5933446A (en) * | 1982-08-18 | 1984-02-23 | Fuji Xerox Co Ltd | Exposure device of copying machine |
US5696577A (en) * | 1992-03-23 | 1997-12-09 | Advanced Scientific Concepts, Inc. | 3D imaging underwater laser radar |
US5696607A (en) * | 1994-10-07 | 1997-12-09 | Sharp Kabushiki Kaisha | Image reader having a light-guiding transparent board |
US5737096A (en) * | 1995-03-27 | 1998-04-07 | Brother Kogyo Kabushiki Kaisha | Light illumination assembly having a tapered light guide plate for an optical reading unit |
US5818033A (en) * | 1993-12-24 | 1998-10-06 | Canon Kabushiki Kaisha | Reading device featuring at least two spaced light emitting elements |
US5959746A (en) * | 1997-06-04 | 1999-09-28 | Tsai; Shui Chuan | Lighting system having partially overlapping light sources for an image scanning device |
US6166832A (en) * | 1995-12-26 | 2000-12-26 | Rohm Co., Ltd. | Contact-type image sensor |
US6172745B1 (en) * | 1996-01-16 | 2001-01-09 | Mars Incorporated | Sensing device |
US6271941B1 (en) * | 1998-05-22 | 2001-08-07 | Eastman Kodak Company | Illuminant head assembly for a photographic film image scanner |
US6614561B1 (en) * | 1999-12-18 | 2003-09-02 | Umax Data Systems, Inc. | Installation for increasing a scanning range of a scanner along an axial direction of a light source |
US6635858B2 (en) * | 2001-08-22 | 2003-10-21 | Hewlett-Packard Development Company, L.P. | Imaging device with an illumination source having an inverted radiation profile and a method of imaging |
US6967751B2 (en) * | 2000-05-30 | 2005-11-22 | Canon Kabushiki Kaisha | Image sensor, and image processing apparatus and information processing system using the same |
US7209268B2 (en) * | 2000-03-16 | 2007-04-24 | Nippon Sheet Glass Co., Ltd. | Line illuminating device |
-
1999
- 1999-12-18 TW TW088222560U patent/TW446257U/en not_active IP Right Cessation
-
2000
- 2000-03-24 US US09/535,500 patent/US6657752B1/en not_active Ceased
-
2005
- 2005-12-02 US US11/293,787 patent/USRE41818E1/en not_active Expired - Lifetime
Patent Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5933446A (en) * | 1982-08-18 | 1984-02-23 | Fuji Xerox Co Ltd | Exposure device of copying machine |
US5696577A (en) * | 1992-03-23 | 1997-12-09 | Advanced Scientific Concepts, Inc. | 3D imaging underwater laser radar |
US5818033A (en) * | 1993-12-24 | 1998-10-06 | Canon Kabushiki Kaisha | Reading device featuring at least two spaced light emitting elements |
US5696607A (en) * | 1994-10-07 | 1997-12-09 | Sharp Kabushiki Kaisha | Image reader having a light-guiding transparent board |
US5737096A (en) * | 1995-03-27 | 1998-04-07 | Brother Kogyo Kabushiki Kaisha | Light illumination assembly having a tapered light guide plate for an optical reading unit |
US6166832A (en) * | 1995-12-26 | 2000-12-26 | Rohm Co., Ltd. | Contact-type image sensor |
US6172745B1 (en) * | 1996-01-16 | 2001-01-09 | Mars Incorporated | Sensing device |
US5959746A (en) * | 1997-06-04 | 1999-09-28 | Tsai; Shui Chuan | Lighting system having partially overlapping light sources for an image scanning device |
US6271941B1 (en) * | 1998-05-22 | 2001-08-07 | Eastman Kodak Company | Illuminant head assembly for a photographic film image scanner |
US6614561B1 (en) * | 1999-12-18 | 2003-09-02 | Umax Data Systems, Inc. | Installation for increasing a scanning range of a scanner along an axial direction of a light source |
US7209268B2 (en) * | 2000-03-16 | 2007-04-24 | Nippon Sheet Glass Co., Ltd. | Line illuminating device |
US6967751B2 (en) * | 2000-05-30 | 2005-11-22 | Canon Kabushiki Kaisha | Image sensor, and image processing apparatus and information processing system using the same |
US6635858B2 (en) * | 2001-08-22 | 2003-10-21 | Hewlett-Packard Development Company, L.P. | Imaging device with an illumination source having an inverted radiation profile and a method of imaging |
Also Published As
Publication number | Publication date |
---|---|
US6657752B1 (en) | 2003-12-02 |
TW446257U (en) | 2001-07-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3982116A (en) | Slit illumination system for copying machine | |
US20070229918A1 (en) | Light-channeling apparatus and method | |
JP2000050031A (en) | Image reader | |
KR100499616B1 (en) | Illumination apparatus and image reading apparatus | |
US20070177223A1 (en) | Optical system scanning unit and an image forming apparatus having the same | |
USRE41818E1 (en) | Installation for improving a scanning range of scanner along an axial direction of a light source | |
USRE40678E1 (en) | Installation for increasing a scanning range of a scanner along an axial direction of a light source | |
US7817311B2 (en) | Scanning apparatus adapted to receive a plurality of different light source parts | |
US7440151B2 (en) | Image reading apparatus | |
JP3181782B2 (en) | Image reading device | |
US5469303A (en) | Brightness compensation for a lamp shade in an optical scanner | |
US7573617B2 (en) | Scanning chassis with a light transparent slot | |
USRE42010E1 (en) | Installation for increasing usable range along axial direction of light source | |
US20040099789A1 (en) | Image sensor module having shortened optical path length and a film scanner using the same | |
US6469774B1 (en) | Image reading apparatus | |
JP2016220125A (en) | Illumination device and image reading apparatus | |
JPH11317842A (en) | Lighting device and image reader using the device | |
US6118555A (en) | Image reading apparatus having a light source including a fluorescent lamp | |
JP3181974B2 (en) | Transparency document reader | |
JP3002245B2 (en) | Image reading device | |
JP2003234873A (en) | Image reader and illumination unit | |
JP3047464U (en) | Multi-level light source device and image scanner using the same | |
US7121682B2 (en) | Scanning device | |
JPH09284483A (en) | Original illuminator | |
JP3046905U (en) | Reading unit |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: TRANSPACIFIC SYSTEMS, LLC, DELAWARE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:TRANSPACIFIC IP LTD.;REEL/FRAME:023107/0267 Effective date: 20090618 |
|
FPAY | Fee payment |
Year of fee payment: 8 |
|
AS | Assignment |
Owner name: TITUSVILLE CANAVERAL LLC, DELAWARE Free format text: MERGER;ASSIGNOR:TRANSPACIFIC SYSTEMS, LLC;REEL/FRAME:030628/0681 Effective date: 20130213 |
|
AS | Assignment |
Owner name: INTELLECTUAL VENTURES I LLC, DELAWARE Free format text: MERGER;ASSIGNOR:TITUSVILLE CANAVERAL LLC;REEL/FRAME:030639/0330 Effective date: 20130214 |
|
FPAY | Fee payment |
Year of fee payment: 12 |
|
AS | Assignment |
Owner name: CEDAR LANE TECHNOLOGIES INC., CANADA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:INTELLECTUAL VENTURES ASSETS LLC;REEL/FRAME:053495/0721 Effective date: 20200428 |