JPS57211870A - Lighting device - Google Patents

Lighting device

Info

Publication number
JPS57211870A
JPS57211870A JP56096602A JP9660281A JPS57211870A JP S57211870 A JPS57211870 A JP S57211870A JP 56096602 A JP56096602 A JP 56096602A JP 9660281 A JP9660281 A JP 9660281A JP S57211870 A JPS57211870 A JP S57211870A
Authority
JP
Japan
Prior art keywords
light
original
illumination
intensity
directions
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.)
Granted
Application number
JP56096602A
Other languages
Japanese (ja)
Other versions
JPH0373189B2 (en
Inventor
Kazumi Komiya
Minoru Kanzaki
Hoichiro Kashiwara
Yoshinori Uchiyama
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.)
Nippon Telegraph and Telephone Corp
Stanley Electric Co Ltd
Original Assignee
Nippon Telegraph and Telephone Corp
Stanley Electric 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 Nippon Telegraph and Telephone Corp, Stanley Electric Co Ltd filed Critical Nippon Telegraph and Telephone Corp
Priority to JP56096602A priority Critical patent/JPS57211870A/en
Publication of JPS57211870A publication Critical patent/JPS57211870A/en
Publication of JPH0373189B2 publication Critical patent/JPH0373189B2/ja
Granted 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Facsimile Heads (AREA)
  • Facsimile Scanning Arrangements (AREA)

Abstract

PURPOSE:To improve the intensity of illumination on the surface of an original by returning again the light dispersed in directions other than that of a reader to the surface of the original. CONSTITUTION:Out of the light outputted from a light source 4 and reflected on the surface of an original 5, the light in the normal direction of the recessed surface 7a of a reflecting surface 7 and light in other directions are reflected again and returned to a focal position A. Consequently the intensity of illumination on the focal position A is sharply increased.
JP56096602A 1981-06-24 1981-06-24 Lighting device Granted JPS57211870A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56096602A JPS57211870A (en) 1981-06-24 1981-06-24 Lighting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56096602A JPS57211870A (en) 1981-06-24 1981-06-24 Lighting device

Publications (2)

Publication Number Publication Date
JPS57211870A true JPS57211870A (en) 1982-12-25
JPH0373189B2 JPH0373189B2 (en) 1991-11-21

Family

ID=14169418

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56096602A Granted JPS57211870A (en) 1981-06-24 1981-06-24 Lighting device

Country Status (1)

Country Link
JP (1) JPS57211870A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61111065A (en) * 1984-11-05 1986-05-29 Matsushita Graphic Commun Syst Inc Photoelectric conversion device
US4920431A (en) * 1984-07-14 1990-04-24 Canon Kabushiki Kaisha Image reading apparatus with jam-prevention feature

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4918539U (en) * 1972-05-19 1974-02-16
JPS5499520U (en) * 1977-12-24 1979-07-13
JPS54158250A (en) * 1978-06-05 1979-12-13 Ricoh Co Ltd Illumination of scanner
JPS5546619A (en) * 1978-09-28 1980-04-01 Ricoh Co Ltd Solid state scanner

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4918539U (en) * 1972-05-19 1974-02-16
JPS5499520U (en) * 1977-12-24 1979-07-13
JPS54158250A (en) * 1978-06-05 1979-12-13 Ricoh Co Ltd Illumination of scanner
JPS5546619A (en) * 1978-09-28 1980-04-01 Ricoh Co Ltd Solid state scanner

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4920431A (en) * 1984-07-14 1990-04-24 Canon Kabushiki Kaisha Image reading apparatus with jam-prevention feature
JPS61111065A (en) * 1984-11-05 1986-05-29 Matsushita Graphic Commun Syst Inc Photoelectric conversion device

Also Published As

Publication number Publication date
JPH0373189B2 (en) 1991-11-21

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