JPH0423360U - - Google Patents
Info
- Publication number
- JPH0423360U JPH0423360U JP6279090U JP6279090U JPH0423360U JP H0423360 U JPH0423360 U JP H0423360U JP 6279090 U JP6279090 U JP 6279090U JP 6279090 U JP6279090 U JP 6279090U JP H0423360 U JPH0423360 U JP H0423360U
- Authority
- JP
- Japan
- Prior art keywords
- light
- image sensor
- shading correction
- shielding plate
- correction device
- 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
- 238000003705 background correction Methods 0.000 claims description 9
- 230000003287 optical effect Effects 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims 1
- 230000035945 sensitivity Effects 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 1
Landscapes
- Facsimile Scanning Arrangements (AREA)
- Facsimile Heads (AREA)
Description
第１図は本考案に係るシエーデイング補正装置
の概略構成を示す斜視図、第２図は本考案に係る
シエーデイングプレートと光路との位置関係を示
す正面図で、同図は平均光量の光源および平均感
度の１次元撮像素子を使用した場合を示す。第３
図は第２図の状態での１次元撮像素子の出力波形
を示すグラフ、第４図は本考案に係るシエーデイ
ングプレートと光路との位置関係を示す正面図で
、同図は過大光量の光源あるいは過大感度の１次
元撮像素子を使用した場合を示す。第５図は第４
図の状態での１次元撮像素子の出力波形を示すグ
ラフである。第６図は従来のシエーデイング補正
装置の概略構成を示す斜視図、第７図は従来のシ
エーデイング補正装置によつてシエーデイング補
正を行なわない時の１次元撮像素子の出力波形を
示すグラフ、第８図はシエーデイング補正を行な
つた時の出力波形を示すグラフである。第９図は
１次元撮像素子の出力値が過大になつた時に従来
のシエーデイング補正装置でシエーデイング補正
を行なつた場合の出力波形を示すグラフである。
１……原稿、２……光源、３……１次元撮像素
子、４……レンズ、５……光路、１１……シエー
デイングプレート、１１ａ……先端側遮光部、１
１ｂ……基部側遮光部、１４……傾斜部。
FIG. 1 is a perspective view showing a schematic configuration of a shading correction device according to the present invention, and FIG. 2 is a front view showing the positional relationship between a shading plate and an optical path according to the present invention. and a case where a one-dimensional image sensor with average sensitivity is used. Third
The figure is a graph showing the output waveform of the one-dimensional image sensor in the state shown in Fig. 2, and Fig. 4 is a front view showing the positional relationship between the shading plate and the optical path according to the present invention. A case is shown in which a light source or a one-dimensional image sensor with excessive sensitivity is used. Figure 5 is the 4th
It is a graph which shows the output waveform of the one-dimensional image sensor in the state of a figure. FIG. 6 is a perspective view showing a schematic configuration of a conventional shading correction device, FIG. 7 is a graph showing an output waveform of a one-dimensional image sensor when no shading correction is performed by the conventional shading correction device, and FIG. 8 is a graph showing an output waveform when shading correction is performed. FIG. 9 is a graph showing an output waveform when a conventional shading correction device performs shading correction when the output value of a one-dimensional image sensor becomes excessive. DESCRIPTION OF SYMBOLS 1... Original document, 2... Light source, 3... One-dimensional imaging device, 4... Lens, 5... Optical path, 11... Shading plate, 11a... Tip side light shielding part, 1
1b... base side light shielding part, 14... inclined part.
Claims (1)
レンズを介して撮像素子に縮小投影する光学機構
に設けられ、前記反射光の光路にその光軸と直交
する板面を有する遮光板を臨ませることによつて
撮像素子の光電変換出力を補正するシエーデイン
グ補正装置において、前記遮光板における遮光部
分の基部側を先端より幅広に形成し、この遮光部
分の両側縁を、先端部から基部に向かうにしたが
つて幅寸法が次第に大きくなるよう傾斜させたこ
とを特徴とするシエーデイング補正装置。 A light shielding plate is provided in an optical mechanism that irradiates light from a light source onto a document and projects reflected light from the document in a reduced size onto an image sensor via a lens, and has a plate surface perpendicular to the optical axis of the reflected light in the optical path of the reflected light. In the shading correction device that corrects the photoelectric conversion output of an image sensor by directing the light-shielding plate toward the front, the base side of the light-shielding portion of the light-shielding plate is formed wider than the tip, and both edges of the light-shielding portion are formed from the tip to the base. A shading correction device characterized in that the device is inclined so that the width dimension gradually increases toward the other side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6279090U JPH0423360U (en) | 1990-06-15 | 1990-06-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6279090U JPH0423360U (en) | 1990-06-15 | 1990-06-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0423360U true JPH0423360U (en) | 1992-02-26 |
Family
ID=31592260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6279090U Pending JPH0423360U (en) | 1990-06-15 | 1990-06-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0423360U (en) |
-
1990
- 1990-06-15 JP JP6279090U patent/JPH0423360U/ja active Pending