JPH01160767U - - Google Patents
Info
- Publication number
- JPH01160767U JPH01160767U JP5751688U JP5751688U JPH01160767U JP H01160767 U JPH01160767 U JP H01160767U JP 5751688 U JP5751688 U JP 5751688U JP 5751688 U JP5751688 U JP 5751688U JP H01160767 U JPH01160767 U JP H01160767U
- Authority
- JP
- Japan
- Prior art keywords
- reading mode
- document reading
- document
- optical system
- reference surface
- 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
- 238000003705 background correction Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
Landscapes
- Facsimile Scanning Arrangements (AREA)
- Facsimile Image Signal Circuits (AREA)
Description
第１図、第２図は本考案に係る原稿読取装置の
第１の実施例の構成図、第３図は本考案の原稿読
取装置の処理流れを示すフローチヤート、第４図
ａ乃至ｃは本考案の原稿読取装置における原稿読
取りとシエーデイング補正データの更新との繰返
し動作を説明するためのタイムチヤート、第５図
、第６図は本考案に係る原稿読取装置の第２の実
施例の構成図、第７図は従来の原稿読取装置の構
成図、第８図は主走査方向の光量分布を示す図で
ある。
１，３０……筐体、２，３，３１……光学ユニ
ツト、４……レンズ、５……光電変換素子、６…
…センサ、８……第１ミラー、９……第２ミラー
、１０……第３ミラー、１１……原稿台、１２，
３２……基準面、θ１，θ２……第１ミラーの角
度。
1 and 2 are block diagrams of a first embodiment of the document reading device according to the present invention, FIG. 3 is a flowchart showing the processing flow of the document reading device of the present invention, and FIGS. 4a to 4c are A time chart for explaining the repetitive operation of reading a document and updating the shading correction data in the document reading device of the present invention. FIGS. 5 and 6 are the configuration of a second embodiment of the document reading device of the present invention. 7 are block diagrams of a conventional document reading device, and FIG. 8 is a diagram showing a light amount distribution in the main scanning direction. 1, 30... Housing, 2, 3, 31... Optical unit, 4... Lens, 5... Photoelectric conversion element, 6...
...Sensor, 8...First mirror, 9...Second mirror, 10...Third mirror, 11...Original table, 12,
32...Reference plane, θ1 , θ2 ...Angle of first mirror.
Claims (1)
ドとに切換える切換手段を備え、該切換手段は、
原稿を所定ライン数読取るごとに光学系を原稿読
取りモードから基準面読取りモードに切換えシエ
ーデイング補正データの更新を行なわせるように
なつていることを特徴とする原稿読取装置。 A switching means is provided for switching the optical system between a document reading mode and a reference surface reading mode, and the switching means includes:
1. A document reading device characterized in that every time a predetermined number of lines of a document are read, an optical system is switched from a document reading mode to a reference surface reading mode to update shading correction data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5751688U JPH01160767U (en) | 1988-04-28 | 1988-04-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5751688U JPH01160767U (en) | 1988-04-28 | 1988-04-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01160767U true JPH01160767U (en) | 1989-11-08 |
Family
ID=31283367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5751688U Pending JPH01160767U (en) | 1988-04-28 | 1988-04-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01160767U (en) |
-
1988
- 1988-04-28 JP JP5751688U patent/JPH01160767U/ja active Pending
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