JPS61206357U - - Google Patents
Info
- Publication number
- JPS61206357U JPS61206357U JP6420386U JP6420386U JPS61206357U JP S61206357 U JPS61206357 U JP S61206357U JP 6420386 U JP6420386 U JP 6420386U JP 6420386 U JP6420386 U JP 6420386U JP S61206357 U JPS61206357 U JP S61206357U
- Authority
- JP
- Japan
- Prior art keywords
- document
- light
- reading device
- light source
- guide system
- 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 description 3
- 238000010586 diagram Methods 0.000 description 6
Landscapes
- Facsimile Scanning Arrangements (AREA)
Description
第１図は光学読取装置の要部の断面図、第２図
は原稿の色の違いによる反射特性の波長依存性を
示した線図、第３図は黄色ＬＥＤアレイを用いた
場合の原稿の色の違いによるコントラストの入力
電流依存性を示した線図、第４図は緑色ＬＥＤア
レイを用いた場合の原稿の色の違いによるコント
ラストの入力電流依存性を示した線図、第５図は
白色原稿における光源を変えたときの受光素子の
明抵抗の違いを示した線図、第６図は黄色ＬＥＤ
及び緑色ＬＥＤの発光光度の入力電流依存性を示
した線図である。
１…イメージセンサユニツト、２…原稿、３…
送りローラ、４…光源、５…導光系、６…イメー
ジセンサアレイ、７…駆動回路。
Figure 1 is a cross-sectional view of the main parts of the optical reading device, Figure 2 is a diagram showing the wavelength dependence of reflection characteristics depending on the color of the original, and Figure 3 is a diagram showing the wavelength dependence of the reflection characteristics depending on the color of the original. Figure 4 is a diagram showing the input current dependence of contrast due to differences in color. Figure 4 is a diagram showing the input current dependence of contrast due to differences in document color when using a green LED array. A diagram showing the difference in bright resistance of the light receiving element when changing the light source for a white original, Figure 6 is a yellow LED.
FIG. 3 is a diagram showing the input current dependence of the luminous intensity of the green LED. 1...Image sensor unit, 2...Original, 3...
Feed roller, 4... Light source, 5... Light guide system, 6... Image sensor array, 7... Drive circuit.
Claims (1)
く導光系と、該導光系により導かれた光を電気信
号に変換するイメージセンサアレイとを具備した
光学読取装置において、原稿を照明する光源とし
て中心波長５７０±５ｎｍ、半値幅３０±５ｎｍ
の高輝度黄色ＬＥＤアレイを用いたことを特徴と
する光学読取装置。 The document is illuminated in an optical reading device that includes a light source that illuminates the document, a light guide system that guides light reflected from the document, and an image sensor array that converts the light guided by the light guide system into an electrical signal. As a light source, the center wavelength is 570 ± 5 nm, and the half width is 30 ± 5 nm.
An optical reading device characterized by using a high-intensity yellow LED array.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6420386U JPS61206357U (en) | 1986-04-30 | 1986-04-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6420386U JPS61206357U (en) | 1986-04-30 | 1986-04-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61206357U true JPS61206357U (en) | 1986-12-26 |
Family
ID=30595071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6420386U Pending JPS61206357U (en) | 1986-04-30 | 1986-04-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61206357U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02137300A (en) * | 1988-11-17 | 1990-05-25 | Matsushita Electric Ind Co Ltd | Lighting device for recognizing mark on printed circuit board |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5081784A (en) * | 1973-11-22 | 1975-07-02 | ||
| JPS5113589A (en) * | 1974-07-25 | 1976-02-03 | Tokyo Shibaura Electric Co | |
| JPS55125765A (en) * | 1979-03-20 | 1980-09-27 | Ricoh Co Ltd | Read-in unit |
-
1986
- 1986-04-30 JP JP6420386U patent/JPS61206357U/ja active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5081784A (en) * | 1973-11-22 | 1975-07-02 | ||
| JPS5113589A (en) * | 1974-07-25 | 1976-02-03 | Tokyo Shibaura Electric Co | |
| JPS55125765A (en) * | 1979-03-20 | 1980-09-27 | Ricoh Co Ltd | Read-in unit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02137300A (en) * | 1988-11-17 | 1990-05-25 | Matsushita Electric Ind Co Ltd | Lighting device for recognizing mark on printed circuit board |
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