JPS5658364A - Illumination device for picture read-in - Google Patents

Illumination device for picture read-in

Info

Publication number
JPS5658364A
JPS5658364A JP13498879A JP13498879A JPS5658364A JP S5658364 A JPS5658364 A JP S5658364A JP 13498879 A JP13498879 A JP 13498879A JP 13498879 A JP13498879 A JP 13498879A JP S5658364 A JPS5658364 A JP S5658364A
Authority
JP
Japan
Prior art keywords
opening
read
width
center
illumination device
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
JP13498879A
Other languages
Japanese (ja)
Inventor
Michinori Nagahiro
Yoshiteru Namoto
Mitsuo Ishii
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP13498879A priority Critical patent/JPS5658364A/en
Publication of JPS5658364A publication Critical patent/JPS5658364A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/024—Details of scanning heads ; Means for illuminating the original
    • H04N1/028—Details of scanning heads ; Means for illuminating the original for picture information pick-up
    • H04N1/02815—Means for illuminating the original, not specific to a particular type of pick-up head

Abstract

PURPOSE:To increase the intensity of illumination at the low temperature, by making the width of opening is the narrowest at the center of a fluorescent light and that gradually increases toward the ends of the fluorescent light, and opposing this opening to the original read-in surface. CONSTITUTION:The width of an opening 11 of a thermal conductor 10 is narrower at the center and gradually increases toward the both ends. Further, the opening 11 of the thermal conductor 10 is located toward a read-in position to illuminate the read-in position. Thus, since the width of opening is made wide at the both ends where the luminous intensity is low conventionally, the difference of the luminous intensity between the both ends and the center can almost be made negligible in the range used for actual read-in.
JP13498879A 1979-10-18 1979-10-18 Illumination device for picture read-in Pending JPS5658364A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13498879A JPS5658364A (en) 1979-10-18 1979-10-18 Illumination device for picture read-in

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13498879A JPS5658364A (en) 1979-10-18 1979-10-18 Illumination device for picture read-in

Publications (1)

Publication Number Publication Date
JPS5658364A true JPS5658364A (en) 1981-05-21

Family

ID=15141297

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13498879A Pending JPS5658364A (en) 1979-10-18 1979-10-18 Illumination device for picture read-in

Country Status (1)

Country Link
JP (1) JPS5658364A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0121928A2 (en) * 1983-04-12 1984-10-17 Computer Gesellschaft Konstanz Mbh Lighting apparatus for an electro-optical scanner
EP0153002A2 (en) * 1984-01-27 1985-08-28 Unisys Corporation Apparatus for controlling light distribution in line scan optical imaging systems
US5499112A (en) * 1993-01-19 1996-03-12 Cannon Kabushiki Kaisha Light guide, illuminating device having the light guide, and image reading device and information processing apparatus having the illuminating device
EP0765071A2 (en) * 1995-09-19 1997-03-26 Ncr International Inc. Device for correcting brightness roll-off at an end of a lamp
US6426807B1 (en) 1993-01-19 2002-07-30 Canon Kabushiki Kaisha Light guide, illuminating device having the light guide, and image reading device and information processing apparatus having the illuminating device

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0121928A2 (en) * 1983-04-12 1984-10-17 Computer Gesellschaft Konstanz Mbh Lighting apparatus for an electro-optical scanner
EP0153002A2 (en) * 1984-01-27 1985-08-28 Unisys Corporation Apparatus for controlling light distribution in line scan optical imaging systems
US5499112A (en) * 1993-01-19 1996-03-12 Cannon Kabushiki Kaisha Light guide, illuminating device having the light guide, and image reading device and information processing apparatus having the illuminating device
US5905583A (en) * 1993-01-19 1999-05-18 Canon Kabushiki Kaisha Light guide illuminating device having the light guide, and image reading device and information processing apparatus having the illuminating device
US6426807B1 (en) 1993-01-19 2002-07-30 Canon Kabushiki Kaisha Light guide, illuminating device having the light guide, and image reading device and information processing apparatus having the illuminating device
US6512600B1 (en) 1993-01-19 2003-01-28 Canon Kabushiki Kaisha Light guide, illuminating device having the light guide, and image reading device and information processing apparatus having the illuminating device
US7057778B2 (en) 1993-01-19 2006-06-06 Canon Kabushiki Kaisha Light guide, illuminating device having the light guide, and image reading device and information processing apparatus having the illuminating device
US7593139B2 (en) 1993-01-19 2009-09-22 Canon Kabushiki Kaisha Light guide, illuminating device having the light guide, and image reading device and information processing apparatus having the illuminating device
EP0765071A2 (en) * 1995-09-19 1997-03-26 Ncr International Inc. Device for correcting brightness roll-off at an end of a lamp
EP0765071A3 (en) * 1995-09-19 1998-09-09 Ncr International Inc. Device for correcting brightness roll-off at an end of a lamp

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