JPS6133553U

JPS6133553U - image reading device

Info

Publication number: JPS6133553U
Application number: JP11586584U
Authority: JP
Inventors: 誠若林; 久喜門馬; 和雄榊; 泰夫高野
Original assignee: 日立工機株式会社
Priority date: 1984-07-27
Filing date: 1984-07-27
Publication date: 1986-02-28

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来技術を用いた画像読み取り装置の概略図、
第２図は本考案を用いた画像読み取り装置の概略図、第
３図は本考案で用いる特定パターンの一実施例を示す平
面図、第４図は画像信号の異常を検出して光電変換素子
異常信号を出力する回路図である。第５図は第４図におけるカウンタ１４のタイムチャート
である。第６図は受光ダイオードアレイ１０が正常である場合の
、第４図に示される回路のタイムチャートである。３は原稿、５はスキャナ、６は照明用ランプ、７．８ａ
，８ｂはそれぞれ第１、第２、第３反射鏡、９は集光レ
ンズ、１０は受光ダイオードアレイである。１１は磁石、１２は磁気センサ、１３はシールである。FIG. 1 is a schematic diagram of an image reading device using conventional technology;
Fig. 2 is a schematic diagram of an image reading device using the present invention, Fig. 3 is a plan view showing an example of a specific pattern used in the present invention, and Fig. 4 is a photoelectric conversion element that detects an abnormality in an image signal. FIG. 3 is a circuit diagram that outputs an abnormal signal. FIG. 5 is a time chart of the counter 14 in FIG. FIG. 6 is a time chart of the circuit shown in FIG. 4 when the light receiving diode array 10 is normal. 3 is a document, 5 is a scanner, 6 is a lighting lamp, 7.8a
, 8b are first, second, and third reflecting mirrors, 9 is a condenser lens, and 10 is a light receiving diode array. 11 is a magnet, 12 is a magnetic sensor, and 13 is a seal.

Claims

[Scope of utility model registration request]

An image reading apparatus comprising an illumination lamp, an original, a photoelectric conversion element, and means for forming an image of reflected light from the original illuminated by the illumination lamp on a light receiving surface of the photoelectric conversion element. Immediately in front of the tip, a detected object with a specific pattern is provided, and it is detected that the image signal when the photoelectric conversion element is reading the specific pattern does not have a waveform corresponding to the specific pattern, An image reading device characterized in that it generates a photoelectric conversion element abnormality signal.