JPS61184362U - - Google Patents
Info
- Publication number
- JPS61184362U JPS61184362U JP6307986U JP6307986U JPS61184362U JP S61184362 U JPS61184362 U JP S61184362U JP 6307986 U JP6307986 U JP 6307986U JP 6307986 U JP6307986 U JP 6307986U JP S61184362 U JPS61184362 U JP S61184362U
- Authority
- JP
- Japan
- Prior art keywords
- light
- reading device
- document reading
- emitting diode
- light source
- 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
- 238000010586 diagram Methods 0.000 description 8
- 238000003491 array Methods 0.000 description 1
Landscapes
- Facsimile Scanning Arrangements (AREA)
Description
第1図は従来の密着形原稿読取装置の1例の断
面図、第2図は緑色及び黄色発光ダイオードの入
力電流に対する発光光度依存性を示した線図、第
3図は白原稿における光源を変えたときの受光素
子明抵抗の違いを示した線図、第4図は白原稿、
赤原稿に対するコントラストの光源を変えた時の
入力電流依存性を示した線図、第5図は本考案に
かかる実施例の光源を用いた原稿読取装置の構成
図、第6図は同一輝度を発光させるための緑色及
び黄色発光ダイオードアレイの入力電流の違いを
示した線図、第7図は各種光源入力電流に対する
コントラストの違いを示した線図、第8図は原稿
受光素子間距離に対するMTFの依存性を示した
線図である。
7……原稿、8……導光系、9……受光素子ア
レイ、10……緑色発光ダイオードアレイ、11
……黄色発光ダイオードアレイ。
Figure 1 is a cross-sectional view of an example of a conventional contact type document reading device, Figure 2 is a diagram showing the dependence of luminous intensity on the input current of green and yellow light emitting diodes, and Figure 3 is a diagram showing the light source for a white original. A diagram showing the difference in the bright resistance of the light receiving element when changing it, Figure 4 is a white original,
A diagram showing the dependence of the contrast on the input current when changing the light source for a red original. Fig. 5 is a diagram showing the configuration of an original reading device using the light source of the embodiment of the present invention. Fig. 6 shows the dependence of the contrast on the input current when the light source is changed. A diagram showing the difference in the input current of green and yellow light emitting diode arrays for emitting light, Figure 7 is a diagram showing the difference in contrast for various light source input currents, and Figure 8 is a diagram showing the MTF with respect to the distance between the document light receiving elements. FIG. 7... Original, 8... Light guiding system, 9... Light receiving element array, 10... Green light emitting diode array, 11
...Yellow light emitting diode array.
Claims (1)
た原稿読取装置の、導光系を挾んで2列に配置さ
れた原稿読取装置用光源において、光源の1列は
発光中心波長が555±5nmの緑色発光ダイオ
ードアレイを用い、他の1列は発光中心波長が5
70±5nmの黄色発光ダイオードアレイを用い
たことを特徴とする原稿読取装置用光源。 In a document reading device configured with a light source, a light guiding system, and a light receiving element, the light sources for the document reading device are arranged in two rows with the light guiding system in between, and one row of the light sources has an emission center wavelength of 555. A ±5 nm green light emitting diode array is used, and the other row has an emission center wavelength of 5 nm.
A light source for a document reading device characterized by using a 70±5 nm yellow light emitting diode array.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6307986U JPS61184362U (en) | 1986-04-28 | 1986-04-28 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6307986U JPS61184362U (en) | 1986-04-28 | 1986-04-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS61184362U true JPS61184362U (en) | 1986-11-17 |
Family
ID=30592892
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6307986U Pending JPS61184362U (en) | 1986-04-28 | 1986-04-28 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61184362U (en) |
-
1986
- 1986-04-28 JP JP6307986U patent/JPS61184362U/ja active Pending