WO2005001529A9 - 導光体およびライン照明装置 - Google Patents
導光体およびライン照明装置Info
- Publication number
- WO2005001529A9 WO2005001529A9 PCT/JP2004/008623 JP2004008623W WO2005001529A9 WO 2005001529 A9 WO2005001529 A9 WO 2005001529A9 JP 2004008623 W JP2004008623 W JP 2004008623W WO 2005001529 A9 WO2005001529 A9 WO 2005001529A9
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- light guide
- reflected
- length direction
- document
- Prior art date
Links
- 238000000149 argon plasma sintering Methods 0.000 claims abstract description 10
- 230000003287 optical effect Effects 0.000 claims 1
- 230000006866 deterioration Effects 0.000 abstract description 3
- 238000005286 illumination Methods 0.000 description 11
- 239000006059 cover glass Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000001902 propagating effect Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
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
- H04N1/03—Details of scanning heads ; Means for illuminating the original for picture information pick-up with photodetectors arranged in a substantially linear array
- H04N1/031—Details of scanning heads ; Means for illuminating the original for picture information pick-up with photodetectors arranged in a substantially linear array the photodetectors having a one-to-one and optically positive correspondence with the scanned picture elements, e.g. linear contact sensors
- H04N1/0318—Integral pick-up heads, i.e. self-contained heads whose basic elements are a light-source, a lens array and a photodetector array which are supported by a single-piece frame
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
- H04N2201/024—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted
- H04N2201/028—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted for picture information pick-up
- H04N2201/03—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted for picture information pick-up deleted
- H04N2201/031—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted for picture information pick-up deleted deleted
- H04N2201/03104—Integral pick-up heads, i.e. self-contained heads whose basic elements are a light source, a lens and a photodetector supported by a single-piece frame
- H04N2201/03108—Components of integral heads
- H04N2201/03112—Light source
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
- H04N2201/024—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted
- H04N2201/028—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted for picture information pick-up
- H04N2201/03—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted for picture information pick-up deleted
- H04N2201/031—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted for picture information pick-up deleted deleted
- H04N2201/03104—Integral pick-up heads, i.e. self-contained heads whose basic elements are a light source, a lens and a photodetector supported by a single-piece frame
- H04N2201/03108—Components of integral heads
- H04N2201/03125—Light guide upstream of the scanned picture elements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
- H04N2201/024—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted
- H04N2201/028—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted for picture information pick-up
- H04N2201/03—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted for picture information pick-up deleted
- H04N2201/031—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted for picture information pick-up deleted deleted
- H04N2201/03104—Integral pick-up heads, i.e. self-contained heads whose basic elements are a light source, a lens and a photodetector supported by a single-piece frame
- H04N2201/03108—Components of integral heads
- H04N2201/03141—Photodetector lens
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
- H04N2201/024—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted
- H04N2201/028—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted for picture information pick-up
- H04N2201/03—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted for picture information pick-up deleted
- H04N2201/031—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted for picture information pick-up deleted deleted
- H04N2201/03104—Integral pick-up heads, i.e. self-contained heads whose basic elements are a light source, a lens and a photodetector supported by a single-piece frame
- H04N2201/03108—Components of integral heads
- H04N2201/03145—Photodetector
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
- H04N2201/024—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted
- H04N2201/028—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted for picture information pick-up
- H04N2201/03—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted for picture information pick-up deleted
- H04N2201/031—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted for picture information pick-up deleted deleted
- H04N2201/03104—Integral pick-up heads, i.e. self-contained heads whose basic elements are a light source, a lens and a photodetector supported by a single-piece frame
- H04N2201/0315—Details of integral heads not otherwise provided for
- H04N2201/0317—Shape
Definitions
- the present invention relates to a light guide for illuminating an original in a linear form with a facsimile, a copying machine, a scanner, or the like, and an image reading apparatus incorporating the light guide.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2001-330734
- Patent Document 2 U.S. Pat.No. 6,259,082
- the present invention has been made to solve such a problem, and the original surface is raised by giving a broader intensity distribution of light at the position of the irradiated object (original position). It is an object of the present invention to provide a light guide capable of reducing the deterioration of a read image even in such a case and a line lighting device incorporating the light guide.
- a light guide according to the present invention is configured to allow light incident from an end face to be emitted from an emission face provided along a length direction while being reflected on an inner face.
- the side profile in the direction perpendicular to the length direction has two elliptical arcs or two parabolic curved surfaces, and the light collection position of the light reflected by one curved surface The light-reflection position of the light reflected by the other curved surface is different from that of the other curved surface.
- the light guide is formed by bonding two halves, for example, and each half has an elliptical arc or a parabolic curved surface serving as a reflection surface.
- the light guide may be integrally formed without being divided into two halves.
- the light guide according to the present invention is configured such that the incident light is emitted from an emission surface provided along the length direction while being reflected by the inner surface, and the light is reflected in the length direction.
- the side surface shape in the direction perpendicular to the plane has two elliptical curved surfaces with different focal lengths.
- the light guide according to the present invention is configured such that the incident light is emitted from an emission surface provided along the length direction while reflecting the incident light on the inner surface.
- the side surface shape in the orthogonal direction has at least one curved surface, and the curved surface has two elliptical arc curved surface regions having different focal lengths.
- the image reading device according to the present invention according to the present invention includes, for example, two illumination units provided with a light source at one end or both ends of the light guide, and each illumination unit also emits a light emitting surface force. The light was radiated on the same area of the original reading surface.
- the light guide of the present invention and the line illumination device using the light guide are provided with a light distribution characteristic which is preferable to a predetermined position and depth by combining light guides having different focal positions. Can be.
- a light distribution characteristic which is preferable to a predetermined position and depth by combining light guides having different focal positions. Can be.
- FIG. 1 is a sectional view showing a light guide according to a first embodiment of the present invention.
- FIG. 2 is a cross-sectional view of a contact-type image sensor (CIS) provided with a line illumination device incorporating the light guide of the present invention.
- CIS contact-type image sensor
- FIG. 3 is a view showing a mounting position of each light emitting diode as a light source provided on an end face of the light guide of the present invention.
- FIG. 4 is a view showing a cross-sectional shape of another light guide of the present invention.
- FIG. 5 is a view showing a cross-sectional shape of another light guide according to the present invention.
- FIG. 6 is a view showing a sectional shape of still another light guide according to the present invention.
- FIG. 7 is a view showing a cross-sectional shape of still another light guide according to the present invention.
- FIG. 1 is a sectional view showing a first embodiment of the light guide according to the present invention.
- the light guide 10 is formed by laminating half bodies 10A and 10B formed of, for example, a transparent resin such as acrylic, and the cross-sectional shape thereof is constant over the entire length of the light guide 10 (for example, 320 mm). And
- the first curved surface 1 formed in the half body 10A is:
- the second curved surface 2 formed in the half body 10B is
- Reference numeral 6 is a bottom surface.
- the propagating light that has reached the light scattering portion 5, which is a printing pattern is scattered and totally reflected by each of the curved surfaces 1 and 2, and each of the outgoing surfaces 3 and 3. Emitted from 4.
- N is the rod refractive index
- N l.49 when the light guide 10 is made of acrylic.
- the emission surface is located in a direction having little scattering directivity, so that the scattered light is emitted after being reflected by the elliptical surface.
- a virtual line indicates a mirror image 7 of the light scattering section 5.
- the mirror image of the light scattering unit 5 is also near the focal point on the long axis plane. And the loss is also low (contributes to mirror image reflection).
- the light guide 10 is shown in which an approximately 1Z4 elliptical light guide having an elliptical arc surface 1 and an approximately 1Z4 elliptical half body 10A and 10B having an elliptical arc surface 2 are attached. It may be one piece. Further, in this embodiment, each curved surface is shown as an elliptical arc, but each curved surface may be a parabola.
- FIG. 2 is a cross-sectional view of a contact type image sensor (CIS) provided with a line illumination device incorporating the light guide of the present invention
- FIG. 3 is a light source as a light source provided on an end face of the light guide of the present invention.
- FIG. 3 is a diagram showing a mounting position of each light emitting diode.
- the contact image sensor (CIS) 30 shown in FIG. 2 includes a housing 31, in which two sets of line lighting devices 20L and 20R are incorporated, and an upright is installed in the housing 31.
- a 1: 1 lens array 32 is arranged, and a substrate 34 provided with a line image sensor 33 below the housing 31 is attached.
- Reference numeral 35 denotes a cover glass constituting the document table.
- the erecting equal-magnification lens array 32 it is preferable to use a lens having a large depth of focus. By using a lens array with a large depth of focus, a clear image can be read even when the document surface rises. It should be noted that the illumination light does not reach the depth of focus no matter how deep the focal depth is! /
- both the illumination system and the erect equal-magnification system must meet the predetermined conditions, that is, the depth of focus must be deep in the erecting equal-magnification system, and in the illumination system, It is preferable to satisfy the condition of illuminating the area with uniform illuminance.
- Each of the line lighting devices 20L and 20R is a light emitting source substrate (shown in FIG. 1) including the light guide 10 shown in FIG. 1, the light guide case 11, and the light emitting diodes 12R, 12G and 12B shown in FIG. No).
- Each light emitting diode 12R, 12G, 12B emits red, green and blue light respectively
- the light emitting diodes 12R, 12G, and 12B are of a chip type (LED chips).
- the light emitting diodes 12R, 12G, and 12B are arranged in a line along the X axis shown in FIG. RU
- the scattered light is reflected on each of the curved surfaces 1 and 2.
- the light reflected by curved surface 1 is focused 0.4 mm upward from the upper surface of cover glass 35, and the light reflected by curved surface 2 is 1.7 mm forward (upward from the upper surface of cover glass 35).
- the illumination light reflected on the reading surface of the document (not shown) is detected by the line image sensor 33 via the cover glass 35 and the lens array 32. As a result, the original is read.
- FIG. 4 is a diagram showing a cross-sectional shape of another light guide of the present invention.
- the light guide 40 shown in FIG. 4 is one in which the steps of the emission surfaces 3A and 4A are eliminated.
- FIG. 5 is a diagram showing a cross-sectional shape of still another light guide according to the present invention.
- each of the light exit surfaces 3B and 4B is inclined to have a deflection effect by a prism.
- FIG. 6 is a diagram showing a cross-sectional shape of another light guide according to the present invention.
- the light guide 60 shown in FIG. 6 is formed by combining one curved surface with first and second elliptical sections having different curvatures.
- FIG. 7 is a diagram showing a cross-sectional shape of another light guide according to the present invention.
- the light guide 70 shown in FIG. 7 is obtained by integrally molding the light guide, and the first curved surface 71 has the same shape as the embodiment shown in FIG.
- a light scattering portion 75 having a printing pattern force of white ink is provided on a bottom surface 74 facing the emission surface 73.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimile Scanning Arrangements (AREA)
- Facsimile Heads (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Light Sources And Details Of Projection-Printing Devices (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005511004A JPWO2005001529A1 (ja) | 2003-06-25 | 2004-06-18 | 導光体およびライン照明装置 |
US10/562,335 US20060152805A1 (en) | 2003-06-25 | 2004-06-18 | Light guide and line illuminator |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003181631 | 2003-06-25 | ||
JP2003-181631 | 2003-06-25 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2005001529A1 WO2005001529A1 (ja) | 2005-01-06 |
WO2005001529A9 true WO2005001529A9 (ja) | 2005-07-14 |
Family
ID=33549534
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/008623 WO2005001529A1 (ja) | 2003-06-25 | 2004-06-18 | 導光体およびライン照明装置 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20060152805A1 (ja) |
JP (1) | JPWO2005001529A1 (ja) |
KR (1) | KR20060016121A (ja) |
CN (2) | CN1813207A (ja) |
TW (1) | TW200509662A (ja) |
WO (1) | WO2005001529A1 (ja) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6714323B1 (en) * | 1999-06-02 | 2004-03-30 | Rohm Co., Ltd. | Image reading apparatus and light conductor used for the same |
WO2007105293A1 (ja) * | 2006-03-13 | 2007-09-20 | Canon Components, Inc. | ライン状照明装置及びそれを用いた画像読取装置 |
JP4717107B2 (ja) * | 2008-11-14 | 2011-07-06 | シャープ株式会社 | 照明装置、画像読取装置及び画像形成装置 |
JP5132648B2 (ja) * | 2009-09-25 | 2013-01-30 | 三菱電機株式会社 | 照明装置および画像読取装置 |
JP6107116B2 (ja) * | 2012-12-18 | 2017-04-05 | セイコーエプソン株式会社 | 原稿照明装置、密着型イメージセンサーモジュールおよび画像読み取り装置 |
WO2014129152A1 (ja) | 2013-02-21 | 2014-08-28 | 三菱電機株式会社 | 導光体及び画像読取装置 |
JP5970420B2 (ja) * | 2013-05-31 | 2016-08-17 | 京セラドキュメントソリューションズ株式会社 | 導光体及び照明装置 |
JP5947777B2 (ja) * | 2013-10-31 | 2016-07-06 | 京セラドキュメントソリューションズ株式会社 | 画像読取装置、画像形成装置、プログラム、及び画像読取方法 |
JP6007361B2 (ja) * | 2014-01-15 | 2016-10-12 | コニカミノルタ株式会社 | 導光体、画像読取用照明装置及び画像読取装置 |
CN106287290A (zh) * | 2016-09-26 | 2017-01-04 | 东莞市奥普特自动化科技有限公司 | 一种聚光装置 |
WO2018155472A1 (ja) * | 2017-02-22 | 2018-08-30 | 三菱電機株式会社 | 照明装置及び画像読取装置 |
KR102571548B1 (ko) * | 2017-05-11 | 2023-08-25 | 에스씨아이브이에이엑스 가부시키가이샤 | 광학 소자 및 광학계 장치 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3140164B2 (ja) * | 1992-05-01 | 2001-03-05 | パイオニア株式会社 | 集光リフレクタ |
US5629996A (en) * | 1995-11-29 | 1997-05-13 | Physical Optics Corporation | Universal remote lighting system with nonimaging total internal reflection beam transformer |
US6259082B1 (en) * | 1997-07-31 | 2001-07-10 | Rohm Co., Ltd. | Image reading apparatus |
EP1085256A1 (en) * | 1999-09-17 | 2001-03-21 | Ford Motor Company | Method and apparatus for collecting light |
JP2001268320A (ja) * | 2000-03-16 | 2001-09-28 | Nippon Sheet Glass Co Ltd | ライン照明装置 |
TW503646B (en) * | 2000-03-16 | 2002-09-21 | Nippon Sheet Glass Co Ltd | Line illuminating device |
US6637924B2 (en) * | 2000-11-15 | 2003-10-28 | Teledyne Lighting And Display Products, Inc. | Strip lighting apparatus and method |
JP2003077813A (ja) * | 2001-09-05 | 2003-03-14 | Nikon Corp | 荷電粒子線露光装置の結像性能の評価方法、荷電粒子線露光装置の調整方法、ビームぼけ計測装置及び荷電粒子線露光装置 |
US7336403B2 (en) * | 2002-05-27 | 2008-02-26 | Canon Kabushiki Kaisha | Optical element and illumination apparatus having same |
-
2004
- 2004-06-18 KR KR1020057024670A patent/KR20060016121A/ko not_active Application Discontinuation
- 2004-06-18 US US10/562,335 patent/US20060152805A1/en not_active Abandoned
- 2004-06-18 WO PCT/JP2004/008623 patent/WO2005001529A1/ja active Application Filing
- 2004-06-18 JP JP2005511004A patent/JPWO2005001529A1/ja not_active Withdrawn
- 2004-06-18 CN CNA200480017904XA patent/CN1813207A/zh active Pending
- 2004-06-18 CN CNA2007101064710A patent/CN101059222A/zh active Pending
- 2004-06-24 TW TW093118286A patent/TW200509662A/zh unknown
Also Published As
Publication number | Publication date |
---|---|
CN101059222A (zh) | 2007-10-24 |
KR20060016121A (ko) | 2006-02-21 |
US20060152805A1 (en) | 2006-07-13 |
CN1813207A (zh) | 2006-08-02 |
WO2005001529A1 (ja) | 2005-01-06 |
JPWO2005001529A1 (ja) | 2006-11-02 |
TW200509662A (en) | 2005-03-01 |
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