JPH03111066U

JPH03111066U -

Info

Publication number: JPH03111066U
Application number: JP1957690U
Authority: JP
Priority date: 1990-02-28
Filing date: 1990-02-28
Publication date: 1991-11-14

Description

[Brief explanation of drawings]

第１図ないし第５図は本考案による原稿読取装
置の一実施例を示す図であり、第１図は全体構成
図、第２図は第１図における−線断面図、第
３図は動作手順を示すフローチヤート、第４図は
レジストセンサからの信号に基づいてソレノイド
に制御信号を出力するＣＰＵの制御ブロツク図、
第５図はシエーデイング歪補正装置の全体ブロツ
ク図、第６図ないし第１０図は従来の原稿読取装
置を示す図であり、第６図はその全体ブロツク図
、第７図は白基準板の原稿側の正面図、第８図は
シエーデイング歪データを示す線図、第９図はシ
エーデイング歪補正データを示す線図、第１０図
は読取画像の白部と黒部との出力レベルの補正結
果を示す線図である。２１……原稿、３１……コンタクトガラス、３
３……照明装置、３４……白基準板、３５……レ
ンズ、３６……受光部材、５０……ソレノイド、
５１……連結部材、５２……スプリング。 1 to 5 are diagrams showing an embodiment of the document reading device according to the present invention, in which FIG. 1 is an overall configuration diagram, FIG. 2 is a cross-sectional view taken along the line -- in FIG. 1, and FIG. 3 is an operation diagram. A flowchart showing the procedure, FIG. 4 is a control block diagram of the CPU that outputs a control signal to the solenoid based on the signal from the registration sensor,
Fig. 5 is an overall block diagram of a shading distortion correction device, Figs. 6 to 10 are diagrams showing a conventional document reading device, Fig. 6 is an overall block diagram thereof, and Fig. 7 is an original with a white reference plate. 8 is a line diagram showing shading distortion data, 9 is a line diagram showing shading distortion correction data, and 10 is a diagram showing output level correction results for white and black parts of a read image. It is a line diagram. 21... Original, 31... Contact glass, 3
3... Illumination device, 34... White reference plate, 35... Lens, 36... Light receiving member, 50... Solenoid,
51...Connection member, 52...Spring.

Claims

[Scope of utility model registration request]

A document reading device comprising a transparent document placing means for placing a document, an illumination device for irradiating light onto the document, and a reading device for receiving reflected light from the document to read an image of the document, A document characterized in that it is provided with a white reference plate provided on the opposite side of the document to the document placement means for correcting shading distortion, and a drive means for moving the white reference plate within the same plane. reading device.