JPS5896453A - Shading compensating construction for picture information reader - Google Patents
Shading compensating construction for picture information readerInfo
- Publication number
- JPS5896453A JPS5896453A JP56194910A JP19491081A JPS5896453A JP S5896453 A JPS5896453 A JP S5896453A JP 56194910 A JP56194910 A JP 56194910A JP 19491081 A JP19491081 A JP 19491081A JP S5896453 A JPS5896453 A JP S5896453A
- Authority
- JP
- Japan
- Prior art keywords
- reading
- image information
- sheet guide
- light
- upper sheet
- 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
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Image Input (AREA)
- Facsimile Scanning Arrangements (AREA)
Abstract
Description
【発明の詳細な説明】
０）発明の技術分野
本発明は螢光灯を光源とする光学文字読取装置やファク
シミリ等の画像情報読取装置において、読み取シの映像
出方が両端部で低下するシェープインク現象を簡単に補
正することができるシェープインク補正構造に関する。Detailed Description of the Invention 0) Technical Field of the Invention The present invention relates to an image information reading device such as an optical character reading device or a facsimile using a fluorescent lamp as a light source, in which the image output of the reading device is reduced at both ends. The present invention relates to a shape ink correction structure that can easily correct ink phenomena.
■ 技術の背景
光学文字読取装置、ファクシｉ９勢の画像情報読取装置
においては、例えば帳票等の画像情報紙上の画像情報を
読み取るのに、螢光灯等の光源から上記画像情報紙の読
取面に読取光を照射し、その反射光を反射鏡にて所定方
向に変え、レンズで適宜縮少して電荷結合素子（ＣＣＤ
）上に儂を結び、光学的情報を電気的信号に変換して読
み取っている。この場合、螢光灯の発元重は、その長手
方向中央部に比して両端部が少なく、従って上記画像情
報紙の読取面への照射光量は両端部において少なくカリ
、この結果上記読取面からの反射光量も両端部において
少なくなる。一方、レンズを通過した光は、原稿中央部
からの入射角の小さな党よシ鳳稿両端部からの入射角の
大きな元の方が暗くなる。このような螢光灯の発光特性
とレンズの特性とを合せると、電荷結合素子上に結ぶ像
は、一様な反射幕を有する読取面からの反射光を受は友
ものであっても、常にその両端部が中央部に比して暗く
なる。従って、読み取りの映像出力が両端部では低く、
読み取）の精度を悪くする。このような現象をシェーデ
ィングというが、このシェーディング現象を補正するに
は、電荷結合素子上に結ぶ像の中央部分を暗くして映像
出力が一方の端から他方の端に至るまで略一定となるよ
うにすればよい。■ Background of the technology In optical character reading devices and image information reading devices such as facsimile i9, in order to read image information on image information paper such as a form, a light source such as a fluorescent lamp is used to illuminate the reading surface of the image information paper. A reading light is irradiated, the reflected light is directed in a predetermined direction by a reflecting mirror, and is appropriately reduced by a lens to produce a charge-coupled device (CCD).
) to convert optical information into electrical signals and read them. In this case, the emission weight of the fluorescent lamp is smaller at both ends than at the center in the longitudinal direction, and therefore the amount of light irradiated onto the reading surface of the image information paper is smaller at both ends, resulting in The amount of reflected light from the end portions also decreases at both ends. On the other hand, the light that passes through the lens is darker when the angle of incidence is smaller from the center of the document, and when the angle of incidence is larger from both ends of the document. Combining the light emitting characteristics of the fluorescent lamp with the characteristics of the lens, the image formed on the charge-coupled device will receive light reflected from a reading surface with a uniform reflective screen, but Both ends are always darker than the center. Therefore, the video output for reading is low at both ends.
(reading) accuracy. This phenomenon is called shading, and in order to correct this shading phenomenon, the central part of the image formed on the charge-coupled device must be darkened so that the video output remains approximately constant from one end to the other. Just do it.
（（至）従来技術と問題点
従来のこの種のシェーディング補正構造は、第１図に示
すように、螢光灯１の上方の反射鏡２の方へ逃げる光を
さえぎる遮光板３の長手方向中央部分を下方に適宜延ば
して（第２図参照）垂下板４を設け、この垂下板４で、
纂２図に示すように、螢光灯１の長手方向中央部分を覆
い、該中央部分からの照射光量を減じてぃ九、或いは、
第１図に示すように、レンズ５の前方に＃レンズ５の真
中部分を覆うような絞ル６を設け、この絞り６てレンズ
５の真中部分への入射光量を減じていた。しかし、上記
第一の従来例の場合は、画像情報紙Ｔの読取面８の周辺
には、螢光灯１、紙送シローラ９．１０及び上シートガ
イド１１、下シートガイド１２等が実装されているので
、この上さらに上記垂下板４を設けるのはスペース的に
無理がある。また、部品点数も増えるので、それだけコ
スト高になる。上記第二の従来例の場合は、シェープイ
ンク補正板のわずかな移動によっても、光量分布が大幅
に変ってしまうため、調整が困難であ夛、不安定である
。((To) Prior Art and Problems) This type of conventional shading correction structure, as shown in FIG. A hanging plate 4 is provided by extending the central part downward (see Fig. 2), and with this hanging plate 4,
As shown in Figure 2, the central part of the fluorescent lamp 1 in the longitudinal direction is covered and the amount of light irradiated from the central part is reduced, or
As shown in FIG. 1, a diaphragm 6 is provided in front of the lens 5 to cover the center portion of the lens 5, and this diaphragm 6 reduces the amount of light incident on the center portion of the lens 5. However, in the case of the first conventional example, the fluorescent lamp 1, paper feed rollers 9, 10, upper sheet guide 11, lower sheet guide 12, etc. are mounted around the reading surface 8 of the image information paper T. Therefore, it is unreasonable in terms of space to further provide the above-mentioned hanging plate 4. Furthermore, since the number of parts increases, the cost increases accordingly. In the case of the second conventional example, even a slight movement of the shape ink correction plate significantly changes the light quantity distribution, making adjustment difficult and often unstable.
（４）発明の目的
本発明は上記事情に対処してなされたもので、実装スペ
ース的に無理がなく、部品点数も増やすこと表く簡単に
シェープインク現象を補正することができる画像情報読
取装置のシェープインク補正構造を提供することを目的
とする。(4) Purpose of the Invention The present invention has been made in response to the above-mentioned circumstances, and is an image information reading device that can easily correct the shape ink phenomenon without requiring excessive mounting space and increasing the number of parts. The purpose of the present invention is to provide a shape ink correction structure.
φ）発明の構成
そしてこの目的は本発明によれば、紙送シローラで画像
情報紙を搬送し、上記画像情報紙を上シートガイドと下
シートガイドとの間に挾んで案内して読取基準面にセッ
トし、該ｌｌｉ像情報紙Ｏｖｔ散面に螢光灯から読取光
を照射して画像情報を読み取る画像情報読破装置におい
て、上記上シートガイドの読取基準面にのぞむ先端部の
端縁を上記螢光灯の長手方向中央部においては大きく、
両側部においては小さく張少出して該先端部に張出部を
設けたことを＃徴とする画像情報読取装置のシェープイ
ンク補正構造を提供することによって達成される。φ) Structure of the Invention According to the present invention, the image information paper is conveyed by a paper feed roller, and the image information paper is sandwiched and guided between an upper sheet guide and a lower sheet guide, and is guided to a reading reference surface. In an image information reading device that reads image information by irradiating reading light from a fluorescent lamp onto the scattered surface of the image information paper Ovt, the edge of the leading end of the upper sheet guide that looks into the reading reference plane is set as above. Larger in the longitudinal center of the fluorescent lamp;
This is achieved by providing a shape ink correction structure for an image information reading device that has a small overhang on both sides and an overhang at the tip.
（６）発明の冥施例
以下、本発明の実施例を添付図面に基いて拝細に説明す
る。(6) Embodiments of the Invention Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
第３図において、帳票等の画像情報紙７紘、一定数のク
ロック信号を印加することによシ駆動するパルスモータ
によって回転される紙送シローラ９．１０によって搬送
され、上シートガイド１１′と下シートガイド１２′と
の間に挾まれて案内され、読取光源たる螢光灯１の近傍
の読取基準面１３にセットされる。上記上シートガイド
１１′と下シー、トガイド１２′とは、読取基準向１３
を通過する画像情報紙Ｔは上下から挾んで＃画像情報紙
Ｔのゆがみを除去するものである。In FIG. 3, image information paper 7, such as a form, is conveyed by paper feed rollers 9 and 10, which are rotated by a pulse motor driven by applying a certain number of clock signals, and is conveyed by an upper sheet guide 11'. It is guided between the lower sheet guide 12' and set on the reading reference plane 13 near the fluorescent lamp 1 which is the reading light source. The upper sheet guide 11' and the lower sheet guide 12' are in the reading reference direction 13.
The image information paper T passing through is sandwiched from above and below to remove distortion of the image information paper T.
そして、上記上シートガイド１１′の螢光灯１の下方に
位置し上記読取基準面１３にのぞむ先端部１４は、適宜
の角度で上方に折シ曲げらへかつ、第４図に示すように
、その端縁を上記螢光灯１の長手方向中央部においては
大きく、両側端部においては小さく張シ出して、略円弧
状の張出部１５が形成されている。この侵出部１５によ
って上記螢元灯１の長手方向中央部分からの画像情報紙
７の読取面８への照射光量を減することができる。なお
、上記張出部１５の形状は、第４図に示す６弧状のもの
に限られず、上記螢光灯１の中央部分からの照射光量を
減じ、最終的に読み取シの映像出力が一方の端から他方
の端に至るまで略一定とでき、るものであればどのよう
な形状であってもよい。Then, the tip end 14 of the upper sheet guide 11' located below the fluorescent lamp 1 and facing the reading reference plane 13 is bent upward at an appropriate angle and then bent as shown in FIG. The end edges of the fluorescent lamp 1 are large at the center in the longitudinal direction and are small at both end portions, thereby forming a substantially arc-shaped projecting portion 15. The amount of light irradiated onto the reading surface 8 of the image information paper 7 from the central portion in the longitudinal direction of the firefly lamp 1 can be reduced by the seepage portion 15. Note that the shape of the projecting portion 15 is not limited to the six-arc shape shown in FIG. It may have any shape as long as it is substantially constant from one end to the other end.
なお、第３図において、符号２は螢元灯１から画像情報
紙７の読取ｔｉ８に照射した読取光の反射光をレンズ５
の方向へ変える反射鏡であ択符号３は螢元灯１から四方
に拡散する元が上記反射１ｉｉｅ２に入射しないように
する遮覚板である。In addition, in FIG. 3, reference numeral 2 indicates the reflected light of the reading light irradiated from the firefly lamp 1 onto the reading ti8 of the image information sheet 7 through the lens 5.
The reference numeral 3 is a shielding plate that prevents the light diffused in all directions from the firefly lamp 1 from entering the reflection 1iie2.
■ 発明の効果
本発明は以上のように構成されたので、上シートガイド
１１′の先端１１ｓ１４に設けられた侵出部１５によっ
て螢光灯１の長手方向中央部分からの画像情報紙Ｔの読
取面８への照射光量を減じ、最終的に画像情報の読み取
シの映像出力を略一定とすることができる。また、上記
張出部１５は上シートガイド１１′の先端部を少し張ル
出しただけなので、従来の画工板４（第１図及び第２図
参照）のように別の部品を実装することを要さず、実装
スペース的に無理がなくなると共に部品点数も増やすこ
となくコストの低廉化を図ることができる。さらに、上
記張出部１５番上シートガイド１１′の先端部１４に設
けたので、画像情報紙Ｔが該先端部１４から螢党灯１側
にのぼってきて引っ掛かるのを上記張出部１５で押える
ことができ、画像情報紙７の搬送をスムーズに行うこと
ができる。さらにまた、上記張出部１５の形状を略円弧
状とした場合は、画像情報紙Ｔが螢元灯１１ｇ１にのぼ
ってきた場合も該画像情報紙Ｔの端辺は常に上記張出部
１５と一点でのみ接触し、その略円弧状の端縁形状に沿
ってよル円滑に下方に押さえられ、画イ駿情報紙Ｔの搬
送を極めてスムーズに行うことができる。■ Effects of the Invention Since the present invention is configured as described above, the image information paper T can be read from the longitudinal center portion of the fluorescent lamp 1 by the extrusion portion 15 provided at the tip 11s14 of the upper sheet guide 11'. By reducing the amount of light irradiated to the surface 8, it is possible to finally keep the image output for reading image information approximately constant. In addition, since the above-mentioned overhanging portion 15 is just a slight extension of the tip of the upper sheet guide 11', it is not possible to mount another part as in the conventional artist's board 4 (see Figs. 1 and 2). This eliminates the need for mounting space, and reduces costs without increasing the number of parts. Furthermore, since the overhang 15 is provided at the tip 14 of the upper sheet guide 11', the overhang 15 prevents the image information paper T from climbing up from the tip 14 toward the fluorescent light 1 side and getting caught. The image information paper 7 can be conveyed smoothly. Furthermore, when the shape of the projecting portion 15 is approximately arc-shaped, even when the image information sheet T climbs up to the firefly light 11g1, the edge of the image information sheet T is always aligned with the projecting portion 15. It makes contact only at one point and is smoothly pressed downward along its generally arcuate edge shape, making it possible to transport the image information paper T extremely smoothly.
第１図は従来のシェープインク補正構造を示す側面図、
第２図は第１図０Ａ−Ａ矢視正面図、＃、３図は本発明
による画像情報読取装置のシェープインク補正構造を示
す側面図、第４図は第３図０Ｂ−Ｂ矢視正面図である。
１・・・・・・螢光灯
７・・・・・・画像情報紙
８・・・・・・読取面
９．１０・・・・・・紙送夛ａ−ラ
１１′・・・・・・上シートガイド
１２′・・・・・・下シートガイド
１３・・・・・・読取基準面
１４・・・・・・先ｇｓｓ
１５・・・・・・張出部
出願人 冨士通株式会社Figure 1 is a side view showing a conventional shape ink correction structure;
2 is a front view as seen from the arrow 0A-A in FIG. 1, FIG. It is a diagram. 1...Fluorescent lamp 7...Image information paper 8...Reading surface 9.10...Paper feed a-ra 11'... ...Top sheet guide 12'...Bottom sheet guide 13...Reading reference surface 14...Target GSS 15...Protrusion portion Applicant Fujitsu Co., Ltd. company
Claims (1)
上シートガイドと下シートガイドとの間に挾んで案内し
て読取基準面にセットし、該画像情報紙の読取面に螢光
灯から読取光を照射して画像情報を読み取る画像情報読
取装置において、上記上シートガイドの読取基Ｓ面にの
ぞむ先端部の端縁を上記螢光灯の長手方向中央部におい
ては大きく、両側端部においては小さく張シ出して該先
端部忙張出部を設けたことを特徴とする画像情報読取装
置のシェーディング補正構造。The image information paper is conveyed by a paper feed roller, the image information paper is sandwiched and guided between the upper sheet guide and the lower sheet guide, and set on the reading reference surface, and a fluorescent light is applied to the reading surface of the image information paper. In an image information reading device that reads image information by irradiating reading light from the upper sheet guide, the edge of the tip of the upper sheet guide that faces the reading base S surface is larger at the center in the longitudinal direction of the fluorescent lamp and larger at both ends. A shading correction structure for an image information reading device, characterized in that the leading end portion is provided with a small overhang.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56194910A JPS5896453A (en) | 1981-12-03 | 1981-12-03 | Shading compensating construction for picture information reader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56194910A JPS5896453A (en) | 1981-12-03 | 1981-12-03 | Shading compensating construction for picture information reader |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5896453A true JPS5896453A (en) | 1983-06-08 |
Family
ID=16332366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56194910A Pending JPS5896453A (en) | 1981-12-03 | 1981-12-03 | Shading compensating construction for picture information reader |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5896453A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS606373U (en) * | 1983-06-23 | 1985-01-17 | 富士通株式会社 | optical reader |
| EP0297566A2 (en) * | 1987-07-02 | 1989-01-04 | Tokyo Electric Co., Ltd. | Original reading apparatus |
| US4812917A (en) * | 1986-03-20 | 1989-03-14 | Ricoh Company, Ltd. | Device for reducing document in size having two facing non-parallel mirrors |
| US5329378A (en) * | 1992-11-18 | 1994-07-12 | Samsung Electronics Co., Ltd. | Facsimile device with a white level controller |
-
1981
- 1981-12-03 JP JP56194910A patent/JPS5896453A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS606373U (en) * | 1983-06-23 | 1985-01-17 | 富士通株式会社 | optical reader |
| US4812917A (en) * | 1986-03-20 | 1989-03-14 | Ricoh Company, Ltd. | Device for reducing document in size having two facing non-parallel mirrors |
| EP0297566A2 (en) * | 1987-07-02 | 1989-01-04 | Tokyo Electric Co., Ltd. | Original reading apparatus |
| US4835619A (en) * | 1987-07-02 | 1989-05-30 | Tokyo Electric Co., Ltd. | Original reading apparatus |
| US5329378A (en) * | 1992-11-18 | 1994-07-12 | Samsung Electronics Co., Ltd. | Facsimile device with a white level controller |
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