JP5533505B2 - 線状光源 - Google Patents
線状光源 Download PDFInfo
- Publication number
- JP5533505B2 JP5533505B2 JP2010218198A JP2010218198A JP5533505B2 JP 5533505 B2 JP5533505 B2 JP 5533505B2 JP 2010218198 A JP2010218198 A JP 2010218198A JP 2010218198 A JP2010218198 A JP 2010218198A JP 5533505 B2 JP5533505 B2 JP 5533505B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- light guide
- illuminance
- diffuse reflection
- document
- 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 - Fee Related
Links
- 239000011521 glass Substances 0.000 description 37
- 238000009792 diffusion process Methods 0.000 description 23
- 238000005286 illumination Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 10
- 230000003287 optical effect Effects 0.000 description 9
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 6
- 239000005020 polyethylene terephthalate Substances 0.000 description 6
- 229920000139 polyethylene terephthalate Polymers 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000004408 titanium dioxide Substances 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- -1 polyethylene terephthalate Polymers 0.000 description 2
- 238000005259 measurement Methods 0.000 description 1
- 239000002245 particle Substances 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
- H04N1/0282—Using a single or a few point light sources, e.g. a laser diode
- H04N1/02835—Using a single or a few point light sources, e.g. a laser diode 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
- H04N1/02885—Means for compensating spatially uneven illumination, e.g. an aperture arrangement
- H04N1/0289—Light diffusing elements, e.g. plates or filters
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Light Sources And Details Of Projection-Printing Devices (AREA)
- Facsimile Scanning Arrangements (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Planar Illumination Modules (AREA)
- Image Input (AREA)
Description
また、受光素子65をY軸方向に1mm持ち上げて、仮想線a上の点a2において、同様にX方向の光の相対強度(%)を測定した(同図の×印)。なお、この場合の相対強度(%)も、上述の場合と同様に、ガラス61の原稿側であって、仮想線aとの交点a1における光の照度(黒丸印の原点)を100%とした場合の相対値である。
このように、該導光体に配置する拡散反射面の位置や特性によって、照度分布を適宜変化させることができる、といった効果がある。
1 導光体
2 光出射面
3 上部
4 下部
5a 側部
5b 側部
7 空気層
8 拡散反射面
9 白色拡散シート
10 支持体
20 原稿照明装置
21 原稿配置用ガラス
22 線状光源
23 光反射面
24 光出射面
25 LED線状光源用導光体
28 拡散反射面
29 拡散反射面
31 導光体
35 受光素子
61 原稿配置用ガラス
62 導光体
63 拡散反射面
64 反射鏡
91 半透明シート
92 鏡面反射体
Claims (1)
- 棒状の導光体の端部にLEDを配置した線状光源において、
前記導光体は、光出射面を含む円弧状の上部と、この上部に対向して形成される光反射面を含む平面状の下部と、該上部と該下部とをつなぐ側部が、それぞれ長手方向に伸びるように形成されており、
前記下部、及び、前記側部の少なくとも一方の全体に亘って、当該導光体の外側に空気層を介して拡散反射部材を設けた線状光源であって、
前記拡散反射部材は、指向性を有する反射面を有することを特徴とする線状光源。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010218198A JP5533505B2 (ja) | 2009-12-18 | 2010-09-29 | 線状光源 |
TW099136711A TW201139939A (en) | 2009-12-18 | 2010-10-27 | Linear light source |
CN2010105999964A CN102121675A (zh) | 2009-12-18 | 2010-12-17 | 线状光源 |
US12/926,918 US20110149590A1 (en) | 2009-12-18 | 2010-12-17 | Linear light source |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009287026 | 2009-12-18 | ||
JP2009287026 | 2009-12-18 | ||
JP2010218198A JP5533505B2 (ja) | 2009-12-18 | 2010-09-29 | 線状光源 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2011147105A JP2011147105A (ja) | 2011-07-28 |
JP5533505B2 true JP5533505B2 (ja) | 2014-06-25 |
Family
ID=44150809
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2010218198A Expired - Fee Related JP5533505B2 (ja) | 2009-12-18 | 2010-09-29 | 線状光源 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20110149590A1 (ja) |
JP (1) | JP5533505B2 (ja) |
CN (1) | CN102121675A (ja) |
TW (1) | TW201139939A (ja) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5538341B2 (ja) * | 2011-10-21 | 2014-07-02 | 京セラドキュメントソリューションズ株式会社 | 画像読取装置及び画像形成装置 |
EP2800348B1 (en) * | 2011-12-27 | 2019-10-02 | Mitsubishi Electric Corporation | Light source unit and image reading device |
JP5963455B2 (ja) | 2012-01-30 | 2016-08-03 | 三菱電機株式会社 | 照射装置及び画像読取装置 |
JP2014123941A (ja) | 2012-11-21 | 2014-07-03 | Canon Inc | 照明装置および画像読取装置 |
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 |
CN103592718B (zh) * | 2013-10-19 | 2017-01-04 | 宜兰汽车配件制造(平湖)有限公司 | 导光条结构 |
CN103591553B (zh) * | 2013-10-19 | 2016-04-20 | 宜兰汽车配件制造(平湖)有限公司 | 以导光条在被照物产生均匀光照度的方法 |
JP2017041370A (ja) * | 2015-08-20 | 2017-02-23 | スタンレー電気株式会社 | 導光体及びこれを用いた車両用灯具 |
JP6969527B2 (ja) * | 2018-09-10 | 2021-11-24 | 豊田合成株式会社 | 発光装置 |
JP7106801B2 (ja) * | 2019-08-09 | 2022-07-27 | 豊田合成株式会社 | 発光装置 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3883121B2 (ja) * | 1993-03-03 | 2007-02-21 | シャープ株式会社 | 照明装置 |
JP2900799B2 (ja) * | 1994-08-01 | 1999-06-02 | 松下電器産業株式会社 | 線状照明装置 |
US6268600B1 (en) * | 1994-08-01 | 2001-07-31 | Matsushita Electric Industrial Co., Ltd. | Linear illumination device |
JPH09138407A (ja) * | 1995-11-14 | 1997-05-27 | Nippon Kayaku Co Ltd | エッジライト型光源装置および液晶表示装置 |
JPH10190960A (ja) * | 1996-12-27 | 1998-07-21 | Rohm Co Ltd | 線状光源装置およびこの線状光源装置を用いた画像読み取り装置 |
DE69836042T2 (de) * | 1997-03-04 | 2007-02-22 | Matsushita Electric Industrial Co., Ltd., Kadoma | Lineare Beleuchtungsvorrichtung |
JPH11185516A (ja) * | 1997-12-25 | 1999-07-09 | Canon Inc | 画像照明装置とこれを用いる画像読取装置 |
JP2002232648A (ja) * | 2001-01-31 | 2002-08-16 | Haruo Matsumoto | 線状照明装置、およびそれを用いた画像読み取り装置 |
JP2004200128A (ja) * | 2002-12-20 | 2004-07-15 | Koninkl Philips Electronics Nv | 補助光源及びそれを用いたフロントライト |
US8109666B2 (en) * | 2006-01-10 | 2012-02-07 | Rohm Co., Ltd. | Light guiding member and linear light source apparatus using same |
EP1887389A3 (en) * | 2006-08-11 | 2008-03-05 | LG Electronics Inc. | Light pipe having a structure of enhancing an emission of a light |
US7611271B2 (en) * | 2007-03-19 | 2009-11-03 | 3M Innovative Properties Company | Efficient light injector |
-
2010
- 2010-09-29 JP JP2010218198A patent/JP5533505B2/ja not_active Expired - Fee Related
- 2010-10-27 TW TW099136711A patent/TW201139939A/zh unknown
- 2010-12-17 CN CN2010105999964A patent/CN102121675A/zh active Pending
- 2010-12-17 US US12/926,918 patent/US20110149590A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
CN102121675A (zh) | 2011-07-13 |
JP2011147105A (ja) | 2011-07-28 |
TW201139939A (en) | 2011-11-16 |
US20110149590A1 (en) | 2011-06-23 |
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