JPH0461963U

JPH0461963U -

Info

Publication number: JPH0461963U
Application number: JP10489790U
Authority: JP
Priority date: 1990-10-06
Filing date: 1990-10-06
Publication date: 1992-05-27

Description

[Brief explanation of the drawing]

第１図は、本考案の一実施例の基準シールの構
成図、第２図は、基準シールおよび原稿から得ら
れる受光素子の出力レベル分布を示す図、第３図
は、従来の読取装置の構成図、第４図は、従来例
における原稿有無検知センサおよび原稿サイズ検
知センサの配置を示す図、第５図は、従来例にお
ける基準シールおよび原稿から得られる受光素子
の出力レベル分布を示す図である。１０……読取部ガラス、１３……原稿読取光源
、１４……ミラー、１５……集光レンズ、１６…
…受光素子、２０……基準シール、２１……第１
の基準反射率面、２２……第２の基準反射率面、
Ａ……読取ライン。 FIG. 1 is a diagram showing the configuration of a reference sticker according to an embodiment of the present invention, FIG. 2 is a diagram showing the output level distribution of the light-receiving element obtained from the reference sticker and a document, and FIG. 4 is a diagram showing the arrangement of the document presence detection sensor and the document size detection sensor in the conventional example, and FIG. 5 is a diagram showing the output level distribution of the light receiving element obtained from the standard seal and the document in the conventional example. It is. 10...Reading unit glass, 13...Document reading light source, 14...Mirror, 15...Condensing lens, 16...
...Light receiving element, 20...Reference seal, 21...First
a reference reflectance surface, 22... a second reference reflectance surface,
A...Reading line.

Claims

[Scope of Claim for Utility Model Registration] A reference sticker having a standard reflectance is provided on the reading line, and the surface of the document fed into the reading line is illuminated, and the gray-scale reflected light from the surface of the document is guided to the light receiving element. In the reading device that performs photoelectric conversion, the reference seal has two parts along the reading line.
A reading device characterized in that surfaces having two reference reflectances are arranged alternately at predetermined intervals.