JPS6410778A - Image reader - Google Patents

Image reader

Info

Publication number
JPS6410778A
JPS6410778A JP62164037A JP16403787A JPS6410778A JP S6410778 A JPS6410778 A JP S6410778A JP 62164037 A JP62164037 A JP 62164037A JP 16403787 A JP16403787 A JP 16403787A JP S6410778 A JPS6410778 A JP S6410778A
Authority
JP
Japan
Prior art keywords
shading correction
light source
light
image reader
image
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
Application number
JP62164037A
Other languages
Japanese (ja)
Inventor
Hideyuki Oguchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Priority to JP62164037A priority Critical patent/JPS6410778A/en
Publication of JPS6410778A publication Critical patent/JPS6410778A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To provide the excellent performance of shading correction and to reduce the production cost of an image sensor by executing the shading correction optically. CONSTITUTION:A shading correction member 2 which corrects the shading for a light receiving sensor 5 by adjusting the quantity of reflection of the light from a light source 1 is disposed to the rear side of the light source 1. This means that the shading correction of an image reader that uses a line- shaped light source and the line-shape light receiving sensor 5, etc., is executed optically by adjusting the quantity of the reflecting light from the shading correction member 2 disposed on the rear side of the light source. As a result, the density resolution of an image and the performance of dynamic range can be improved, and also, the cost of the image reader can be reduced because an electrical correction circuit is made unnecessary.
JP62164037A 1987-07-02 1987-07-02 Image reader Pending JPS6410778A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62164037A JPS6410778A (en) 1987-07-02 1987-07-02 Image reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62164037A JPS6410778A (en) 1987-07-02 1987-07-02 Image reader

Publications (1)

Publication Number Publication Date
JPS6410778A true JPS6410778A (en) 1989-01-13

Family

ID=15785603

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62164037A Pending JPS6410778A (en) 1987-07-02 1987-07-02 Image reader

Country Status (1)

Country Link
JP (1) JPS6410778A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1459516A1 (en) * 2001-11-26 2004-09-22 Howtek Devices Corporation Digitizer with masking apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1459516A1 (en) * 2001-11-26 2004-09-22 Howtek Devices Corporation Digitizer with masking apparatus
EP1459516A4 (en) * 2001-11-26 2007-06-27 Howtek Devices Corp Digitizer with masking apparatus

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