JPS5840972A - Constitution of original reader - Google Patents
Constitution of original readerInfo
- Publication number
- JPS5840972A JPS5840972A JP56138629A JP13862981A JPS5840972A JP S5840972 A JPS5840972 A JP S5840972A JP 56138629 A JP56138629 A JP 56138629A JP 13862981 A JP13862981 A JP 13862981A JP S5840972 A JPS5840972 A JP S5840972A
- Authority
- JP
- Japan
- Prior art keywords
- light
- original
- source
- reflected
- 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
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
- H04N1/03—Details of scanning heads ; Means for illuminating the original for picture information pick-up with photodetectors arranged in a substantially linear array
- H04N1/031—Details of scanning heads ; Means for illuminating the original for picture information pick-up with photodetectors arranged in a substantially linear array the photodetectors having a one-to-one and optically positive correspondence with the scanned picture elements, e.g. linear contact sensors
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimile Heads (AREA)
- Facsimile Scanning Arrangements (AREA)
Abstract
Description
【発明の詳細な説明】 本発明は密層形の原稿読取装置の構成に関する。[Detailed description of the invention] The present invention relates to the structure of a dense layer document reading device.
従来の密着形原稿読取装置は第１図に示す如く構成され
ている。図について簡単に説明すると、符号１及び１′
は光源、２は例えばセルフォックレンズ尋會用いた導光
系Ｊは受光素子アレイ、４は駆動回路である。そしてロ
ー９５によシ送られる原稿６を光源ｌ、１′によシ照射
し、その反射光を導光系２によって受光素子アレイ３Ｉ
Ｃ４き、−こζで光電変換を行ない原稿を読敞るように
なっている。A conventional contact type document reading device is constructed as shown in FIG. To briefly explain the figure, reference numerals 1 and 1'
2 is a light source, 2 is a light guiding system J using, for example, a SELFOC lens assembly, is a light receiving element array, and 4 is a drive circuit. Then, the original 6 sent by the row 95 is irradiated by the light sources 1 and 1', and the reflected light is sent to the light receiving element array 3I by the light guiding system 2.
C4, - and ζ perform photoelectric conversion to read the manuscript.
このような原稿読取装置において、光源に発光〆イオー
ドアレイを用いるときは１列では照度が不足するため図
の如く導光系２を挾んで２列を用いている。ところが２
列を用いると光源の均一性を得ることがむずかしく、ま
た消費電力４大となる０本発明はこれらの問題を解決す
るために案出されたものである。In such an original reading apparatus, when a light emitting diode array is used as a light source, one row does not provide enough illuminance, so two rows are used with a light guide system 2 in between as shown in the figure. However, 2
When arrays are used, it is difficult to obtain uniformity of the light source, and the power consumption is the fourth largest.The present invention was devised to solve these problems.
このため本発明においては、光源と導光系と受光素子プ
レイとを具備して構成された密着形原稿読取装置にお−
いて、導光系を挾んで一方には原稿を照明する光源を配
設し、他方には原稿からの反射光を再度原稿に反射せし
めるように反射板を配設し九ことを特徴とするものであ
る。Therefore, in the present invention, a contact type document reading device configured with a light source, a light guide system, and a light receiving element play is provided.
A light source for illuminating the original is disposed on one side of the light guiding system, and a reflecting plate is disposed on the other side so that the light reflected from the original is reflected back onto the original. It is.
以下、添付図面に基づいて本発明の実施例につき詳細に
説明する。Hereinafter, embodiments of the present invention will be described in detail based on the accompanying drawings.
第２図に実施例を模式図によシ示す６図について説明す
ると符号７は光源、８はセルフォックレンズ等を用いた
導光系、９は受光素子アレイであＪ）、１０が本発明の
要点である反射板である。この反射板ｌＯは反射率の良
好な材料で形成された平面又は凹面の反射板であり、導
光系８を挾んで光源７に対向する位置に配設されている
。また受光素子アレイ９は原稿１１からの反射光を導光
系８を介して受光できるように配置されている。Referring to Fig. 6, which schematically shows an embodiment in Fig. 2, reference numeral 7 is a light source, 8 is a light guide system using a SELFOC lens, 9 is a light receiving element array (J), and 10 is the invention of the present invention. The main point is the reflector. This reflecting plate 1O is a flat or concave reflecting plate made of a material with good reflectivity, and is disposed at a position facing the light source 7 with the light guide system 8 in between. Further, the light receiving element array 9 is arranged so as to be able to receive reflected light from the original 11 via the light guide system 8.
このように構成された本実施例は、光源７よりの光が原
稿１１を照射したとき、その反射した光が導光系８を通
って受光素子アレイ９に達すると同時に、光源７より原
稿１１に反射した光が反射板１０により反射されて再び
原稿１１を照射する。In this embodiment configured as described above, when the light from the light source 7 illuminates the original 11, the reflected light passes through the light guide system 8 and reaches the light receiving element array 9, and at the same time, the light from the light source 7 illuminates the original 11. The reflected light is reflected by the reflecting plate 10 and illuminates the original 11 again.
このため受光素子アレイには光源７より原稿１１により
直接反射された光と、光源７より原稿１１−反射板１０
−原稿１１と反射された光とが入射する。従って受光素
子アレイ９に入射される光は反射板を用いない場合より
も増大する。Therefore, the light receiving element array receives the light directly reflected by the original 11 from the light source 7, and the light directly reflected from the original 11 by the light reflecting plate 10 from the light source 7.
- The original 11 and the reflected light are incident. Therefore, the amount of light incident on the light-receiving element array 9 increases compared to the case where no reflector is used.
第３図はこの様子を図示したものである０図は縦軸に白
原稿を照射したときの受光素子の明抵抗ヲ、横軸に光源
の発光ダイオードアレイの１素子当りの入力電流をとシ
、その関係を曲線Ａにより反射板を設けた本発明の場合
を、曲線Ｂにより反射板のない場合を示し友０図よυ本
発明の場合は従来に比して受光素子の明抵抗は２０％程
度低下し、原稿への照射量が増加したことがわかる。Figure 3 shows this situation. In Figure 0, the vertical axis shows the bright resistance of the light receiving element when a white original is irradiated, and the horizontal axis shows the input current per element of the light source's light emitting diode array. , the relationship is shown by curve A for the case of the present invention with a reflector provided, and by curve B for the case without the reflector. It can be seen that the amount of irradiation to the original document has increased.
また第４図は白原稿に対する赤又は黒原稿のコントラス
トの光源入力電流依存性を示したものである０図の丸印
は本発明の反射板のある場合、角印は反射板のない場合
で、下方の曲線が赤原稿に対する場合、上方の曲線が黒
原稿に対する場合を示したものであるがコントラストに
関しては反射板の有無は殆んど影響がないことがわかる
。Figure 4 shows the dependence of the contrast of a red or black original on a white original on the light source input current. The lower curve shows the case for a red original, and the upper curve shows the case for a black original, and it can be seen that the presence or absence of a reflector has almost no effect on contrast.
第５図は光源に発光ダイオードアレイを１列用いた場合
と、これに反射板を用いた場合、及び発光ダイオードア
レイを２列用いた場合の光源入力電流（１列のアレイは
１素子当り、２列のプレイは２素子当り）と原稿面の照
度との関係を示したものである０図は縦軸に原稿面の照
度を、横軸に光源入力電流をとシ、曲線ムにより本発明
の発光ダイオードアレイ１列と反射板を用いた場合を、
曲＠ＢＫより発光ダイオードプレイ１列のみの場合を、
曲線Ｃによシ発光ダイオードアレイ２列の場合を示した
。図より光源への入力電流が同一ならば本発明の場合が
一番有力であることがわかる。Figure 5 shows the light source input current when one row of light-emitting diode arrays is used as a light source, when a reflector is used for this, and when two rows of light-emitting diode arrays are used (one row of array is per element, The figure shows the relationship between the illuminance of the document surface and the illuminance of the document surface (two rows of play per two elements). When using one row of light emitting diode array and a reflector,
From the song @BK, the case where there is only one row of light emitting diode play,
Curve C shows the case of two rows of light emitting diode arrays. It can be seen from the figure that if the input current to the light source is the same, the case of the present invention is the most effective.
以上説明した如く本発明は原稿読取装置においてその光
源に１列の発光ダイオードプレイと反射板を用いること
により、発光ダイオードアレイの光を有効に使用するこ
とを可畦としたものであり消費電力の節減にも寄与する
ものである。As explained above, the present invention makes it possible to effectively use the light from the light emitting diode array by using a row of light emitting diode plates and a reflector as the light source in a document reading device, thereby reducing power consumption. This also contributes to savings.
＠１図は従来の密着形原稿読増装置の１例の断面図、第
２同社本発明にかかる実施例の原稿読取装置の構成金示
す模式図、第３図は実施例の反射板の効果を受光素子の
明抵抗の光源入力電流依存性により示した線図、第４図
は同じく白原稿に対する赤黒原稿のコントラストの光源
入力電流依存性を示した線図、第５図は同じく原稿面照
度の光源入力電流依存性を示した線図である。
７・・・光源、訃・・導光系、９・・・受光素子アレイ
、１０・・・反射板。
第１図
第２図
第３図
発光タイオードアレイ１素子当りの大刀電流（ｍＡ）第
４図@ Figure 1 is a cross-sectional view of an example of a conventional contact type document reading device, Figure 2 is a schematic diagram showing the structure of a manuscript reading device according to an embodiment of the present invention, and Figure 3 is the effect of a reflector plate in an embodiment. Figure 4 is a diagram showing the dependence of the bright resistance of the light receiving element on the light source input current, Figure 4 is a diagram showing the dependence of the contrast of a red and black original relative to a white original on the light source input current, and Figure 5 is a diagram showing the dependence of the light source input current on the bright resistance of the light receiving element. FIG. 2 is a diagram showing the dependence of the light source input current on the light source input current. 7... Light source,... Light guide system, 9... Light receiving element array, 10... Reflector plate. Figure 1 Figure 2 Figure 3 Current (mA) per light emitting diode array element Figure 4
Claims (1)
れた密着形原稿読取装置において、導光系を挾んで一方
には原稿を照明する光源を配設し、他方には磨稿からの
反射光を再度原稿に反射せしめるように反射板を配設し
たことを特徴とする原稿読取装置の構成。1. In a close-contact document reading device configured with a light source, a light guide system, and a light receiving element array, a light source for illuminating the document is disposed on one side with the light guide system in between, and a light source for illuminating the document is disposed on the other side. A configuration of a document reading device characterized in that a reflecting plate is disposed so as to reflect the reflected light back onto the document.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56138629A JPS5840972A (en) | 1981-09-04 | 1981-09-04 | Constitution of original reader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56138629A JPS5840972A (en) | 1981-09-04 | 1981-09-04 | Constitution of original reader |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5840972A true JPS5840972A (en) | 1983-03-10 |
Family
ID=15226518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56138629A Pending JPS5840972A (en) | 1981-09-04 | 1981-09-04 | Constitution of original reader |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5840972A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3418366A1 (en) * | 1983-05-18 | 1984-11-22 | Canon K.K., Tokio/Tokyo | IMAGE READER |
| JPS6147554U (en) * | 1984-08-30 | 1986-03-29 | キヤノン株式会社 | image reading device |
| EP0596715A1 (en) * | 1992-11-04 | 1994-05-11 | Canon Kabushiki Kaisha | Contact type image sensor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4915807B1 (en) * | 1969-08-29 | 1974-04-17 | ||
| JPS51139325A (en) * | 1975-05-28 | 1976-12-01 | Ricoh Co Ltd | Illumination device for slit exposure |
| JPS5440036A (en) * | 1977-09-05 | 1979-03-28 | Toshiba Corp | Optical reader |
-
1981
- 1981-09-04 JP JP56138629A patent/JPS5840972A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4915807B1 (en) * | 1969-08-29 | 1974-04-17 | ||
| JPS51139325A (en) * | 1975-05-28 | 1976-12-01 | Ricoh Co Ltd | Illumination device for slit exposure |
| JPS5440036A (en) * | 1977-09-05 | 1979-03-28 | Toshiba Corp | Optical reader |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3418366A1 (en) * | 1983-05-18 | 1984-11-22 | Canon K.K., Tokio/Tokyo | IMAGE READER |
| JPS6147554U (en) * | 1984-08-30 | 1986-03-29 | キヤノン株式会社 | image reading device |
| EP0596715A1 (en) * | 1992-11-04 | 1994-05-11 | Canon Kabushiki Kaisha | Contact type image sensor |
| US5357099A (en) * | 1992-11-04 | 1994-10-18 | Canon Kabushiki Kaisha | Contact type image sensor having original support member with a reflecting surface |
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