JPS6258959U - - Google Patents
Info
- Publication number
- JPS6258959U JPS6258959U JP14814785U JP14814785U JPS6258959U JP S6258959 U JPS6258959 U JP S6258959U JP 14814785 U JP14814785 U JP 14814785U JP 14814785 U JP14814785 U JP 14814785U JP S6258959 U JPS6258959 U JP S6258959U
- Authority
- JP
- Japan
- Prior art keywords
- light source
- reading device
- document surface
- image reading
- linear light
- 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
- 230000003287 optical effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
Description
第１図ａは本考案の一実施例に係る画像読取装
置の光源の構成図、第１図ｂはその回路図、第２
図は照度計算のための説明図、第３図は上記光源
による相対照度を示すグラフ図、第４図は従来の
画像読取装置の一構成図、第５図は第４図におけ
る相対照度を示すグラフ図である。
１…線状光源、＃１〜＃１５…ブロツク、Ｒ１
〜Ｒ１５…抵抗、Ｄ１〜Ｄ６…発光ダイオード（
ＬＥＤ）。
FIG. 1a is a configuration diagram of a light source of an image reading device according to an embodiment of the present invention, FIG. 1b is a circuit diagram thereof, and FIG.
The figure is an explanatory diagram for illuminance calculation, Figure 3 is a graph diagram showing the relative illuminance due to the above light source, Figure 4 is a configuration diagram of a conventional image reading device, and Figure 5 shows the relative illuminance in Figure 4. It is a graph diagram. 1... Linear light source, #1 to #15... Block, R1
~R15...Resistor, D1-D6...Light emitting diode (
LED).
Claims (1)
し、その反射光をレンズを含む縮小光学系を介し
てラインイメージセンサに収束する画像読取装置
において、複数の発光ダイオードを所定間隔で上
記原稿面の読取幅に配列して線状光源を形成する
と共に、この線状光源を複数のブロツクに分割し
、それらのブロツクに、上記レンズの光軸からの
距離に対応した駆動電流を供給する駆動電流供給
回路を設けたことを特徴とする画像読取装置。 In an image reading device that illuminates a document surface along the scanning direction with a linear light source and converges the reflected light onto a line image sensor via a reduction optical system including a lens, a plurality of light emitting diodes are arranged at predetermined intervals to illuminate the document surface. A drive current that forms a linear light source by arranging it with a reading width of An image reading device characterized by being provided with a supply circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14814785U JPS6258959U (en) | 1985-09-30 | 1985-09-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14814785U JPS6258959U (en) | 1985-09-30 | 1985-09-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6258959U true JPS6258959U (en) | 1987-04-11 |
Family
ID=31062153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14814785U Pending JPS6258959U (en) | 1985-09-30 | 1985-09-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6258959U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5570168A (en) * | 1978-11-22 | 1980-05-27 | Nec Corp | Light source for facsimile |
| JPS5640853A (en) * | 1979-09-12 | 1981-04-17 | Ricoh Co Ltd | Illuminator for copying machine |
-
1985
- 1985-09-30 JP JP14814785U patent/JPS6258959U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5570168A (en) * | 1978-11-22 | 1980-05-27 | Nec Corp | Light source for facsimile |
| JPS5640853A (en) * | 1979-09-12 | 1981-04-17 | Ricoh Co Ltd | Illuminator for copying machine |