JPH0197665U

JPH0197665U -

Info

Publication number: JPH0197665U
Application number: JP19306787U
Authority: JP
Priority date: 1987-12-18
Filing date: 1987-12-18
Publication date: 1989-06-29

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例の全体構成を示す説
明図、第２図ａ及びｂはシエーデイング補正板を
移動させるための第１の構成例を示した説明図、
第３図はシエーデイング補正板を移動させるため
の第２の構成例を示した説明図、第４図はシエー
デイング補正板を移動させるための第３の構成例
を示した説明図、第５図ａ及びｂは原稿位置ずれ
防止のための機構の構成例を示す説明図及び一部
拡大図、第６図は従来の反射原稿読取装置の構成
説明図、第７図はタイミング図である。Ａ……反射原稿読取装置、Ｂ……透過原稿読取
用光源装置、１……コンタクトガラス、２……第
１の走行体２、３……第２の走行体、４……光学
系、５……ＣＣＤイメージセンサ、６……反射原
稿用光源、７，８……反射ミラー、１０……シエ
ーデイング補正板、２０……ケーシング、２１…
…透過原稿用光源、２２……拡散板又はフレネル
ゾーンプレート、３０……保持部材、３２，３３
……ギヤ、４０……突片、４５……カバー、４５
ａ……開口。 FIG. 1 is an explanatory diagram showing the overall configuration of an embodiment of the present invention, FIGS. 2 a and b are explanatory diagrams showing a first configuration example for moving the shading correction plate,
FIG. 3 is an explanatory diagram showing a second configuration example for moving the shading correction plate, FIG. 4 is an explanatory diagram showing a third configuration example for moving the shading correction plate, and FIG. 5a and b are an explanatory diagram and a partially enlarged view showing an example of the configuration of a mechanism for preventing document position shift, FIG. 6 is an explanatory diagram of the configuration of a conventional reflective document reading device, and FIG. 7 is a timing diagram. A... Reflective original reading device, B... Transmissive original reading light source device, 1... Contact glass, 2... First running body 2, 3... Second running body, 4... Optical system, 5 ...CCD image sensor, 6...Reflection light source for originals, 7, 8...Reflection mirror, 10...Shading correction plate, 20...Casing, 21...
...Light source for transparent originals, 22...Diffusion plate or Fresnel zone plate, 30...Holding member, 32, 33
... Gear, 40 ... Protrusion, 45 ... Cover, 45
a...Opening.

Claims

[Claims for Utility Model Registration] (1) A document reading device capable of reading transparent and reflective documents using an image sensor, which uses image data read at a predetermined position close to the document reading area. comprising means for performing shading correction for each main scan, and a shading correction plate having a constant density surface supported so as to be movable back and forth between the predetermined position and a position evacuated from the predetermined position; A reflective/transmissive document reading device characterized in that the plate is located at the predetermined position when reading a reflective original, and is retracted from the predetermined position when reading a transparent original so that transmitted light passing through the predetermined position can be read. (2) The reflection device according to claim 1 of the utility model registration, characterized in that the operation for advancing and retracting the shading correction plate is performed in accordance with the attachment and detachment of a device equipped with a light source for reading transparent originals. Transparent dual-purpose document reading device. (3) A utility model registration characterized in that the operation for advancing and retracting the shading correction plate is performed based on selection by a means for selecting a reading mode of a transparent original or a reflective original. A reflective/transmissive document reading device according to claim 1. (4) The reflective/transmissive document reading device according to claim 1, wherein the document reading device has a document reference scale provided separately from the shading correction plate. (5) The document reading device has an outer cover located above the predetermined position, and an opening is formed in the outer cover portion located directly above the predetermined position. The reflective/transmissive document reading device according to scope 1.