JPH0329935U - - Google Patents
Info
- Publication number
- JPH0329935U JPH0329935U JP8938889U JP8938889U JPH0329935U JP H0329935 U JPH0329935 U JP H0329935U JP 8938889 U JP8938889 U JP 8938889U JP 8938889 U JP8938889 U JP 8938889U JP H0329935 U JPH0329935 U JP H0329935U
- Authority
- JP
- Japan
- Prior art keywords
- scanning direction
- lens
- document
- end surfaces
- line
- 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.)
- Pending
Links
Landscapes
- Facsimile Scanning Arrangements (AREA)
- Light Sources And Details Of Projection-Printing Devices (AREA)
Description
第１図は本考案による画像読取り用照明装置の
一実施例を示す概略断面図、第２図は本考案によ
る画像読取り用照明装置の他の実施例を示す概略
断面図である。第３図は従来の画像読取り用照明
装置の一例を示す概略断面図、第４図は第３図の
装置による照度分布を示すグラフである。
１０……画像読取り用照明装置、１１……基板
、１２……ＬＥＤチツプ、１３……ＬＥＤアレイ
、１４……ランプハウス、１５……凸レンズ。
FIG. 1 is a schematic sectional view showing one embodiment of the image reading illumination device according to the present invention, and FIG. 2 is a schematic sectional view showing another embodiment of the image reading illumination device according to the present invention. FIG. 3 is a schematic sectional view showing an example of a conventional image reading illumination device, and FIG. 4 is a graph showing the illuminance distribution by the device shown in FIG. 10... Illumination device for image reading, 11... Substrate, 12... LED chip, 13... LED array, 14... Lamp house, 15... Convex lens.
Claims (1)
て、その移動方向に直交する走査方向に沿つて一
列に並んだＬＥＤを備えたＬＥＤアレイと、該Ｌ
ＥＤアレイの上方で上記走査方向に平行な中心軸
を有する円筒状の凸レンズとを含んでおり、該原
稿の表面で走査方向に延びるライン状の照明光を
照射する画像読取り用照明装置において、上記レ
ンズが、その両端面の内側で長手方向の両端付近
に寄与するよう全反射するように、該端面が鏡面
として形成されていることを特徴とする画像読取
り用照明装置。 An LED array including LEDs arranged in a line along a scanning direction perpendicular to the direction of movement of a document that is relatively moved in one direction;
and a cylindrical convex lens having a central axis parallel to the scanning direction above the ED array, and irradiating a line-shaped illumination light extending in the scanning direction on the surface of the document. An illuminating device for image reading, wherein the end surfaces of the lens are formed as mirror surfaces so that the lens causes total reflection to contribute to the vicinity of both ends in the longitudinal direction inside the end surfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8938889U JPH0329935U (en) | 1989-07-29 | 1989-07-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8938889U JPH0329935U (en) | 1989-07-29 | 1989-07-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0329935U true JPH0329935U (en) | 1991-03-25 |
Family
ID=31638967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8938889U Pending JPH0329935U (en) | 1989-07-29 | 1989-07-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0329935U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008032588A1 (en) * | 2006-09-15 | 2008-03-20 | Oisllee Planning Co., Ltd | Document illuminating method, document illuminating device, and image reader |
| JP2011135585A (en) * | 2011-01-14 | 2011-07-07 | Ricoh Co Ltd | Original lighting system, image reader, and image forming apparatus |
| JP2019063708A (en) * | 2017-09-29 | 2019-04-25 | ウシオ電機株式会社 | Light irradiation device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6381873A (en) * | 1986-09-26 | 1988-04-12 | Toshiba Corp | Light emitting device |
-
1989
- 1989-07-29 JP JP8938889U patent/JPH0329935U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6381873A (en) * | 1986-09-26 | 1988-04-12 | Toshiba Corp | Light emitting device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008032588A1 (en) * | 2006-09-15 | 2008-03-20 | Oisllee Planning Co., Ltd | Document illuminating method, document illuminating device, and image reader |
| JP2011135585A (en) * | 2011-01-14 | 2011-07-07 | Ricoh Co Ltd | Original lighting system, image reader, and image forming apparatus |
| JP2019063708A (en) * | 2017-09-29 | 2019-04-25 | ウシオ電機株式会社 | Light irradiation device |