JPS55154874A - Original reader - Google Patents

Original reader

Info

Publication number
JPS55154874A
JPS55154874A JP6158079A JP6158079A JPS55154874A JP S55154874 A JPS55154874 A JP S55154874A JP 6158079 A JP6158079 A JP 6158079A JP 6158079 A JP6158079 A JP 6158079A JP S55154874 A JPS55154874 A JP S55154874A
Authority
JP
Japan
Prior art keywords
original
electric signal
input
laser beam
adder
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
JP6158079A
Other languages
Japanese (ja)
Inventor
Tsutomu Saito
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP6158079A priority Critical patent/JPS55154874A/en
Publication of JPS55154874A publication Critical patent/JPS55154874A/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
    • H04N1/03—Details of scanning heads ; Means for illuminating the original for picture information pick-up with photodetectors arranged in a substantially linear array

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Scanning Arrangements (AREA)

Abstract

PURPOSE:To remove or lessen an influence of stary light by constituting an arithmetic circuit so that an electric signal from a photo detector will selectively be added corresponding to the size of an original to be read. CONSTITUTION:The read original 13 samll in size, an input from key switch 22 opens switches 181 and 183 and closes 182. Then, when a laser beam stays near both X-directional end parts of an original holding part, stray light strikes optical fiber element groups 151 and 153 because of no original and photoelectric converting elements 161 and 163 output an electric signal corresponding to the quantity of the stray light. However, since switches 181 and 183 are left open, the outputs of amplifiers 171 and 173 are never input to analog adder 19. Next, when the laser beam is in the region of original 13, the laser beam strickes optical fiber elememt group 152 by scattering and reflecting from original 13. Therefore, an electric signal corresponding to shade information on original 13 is input to adder 19. On the other hand, although the stray light strike element groups 151 and 153, its electric signal is never input to adder 19.
JP6158079A 1979-05-21 1979-05-21 Original reader Pending JPS55154874A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6158079A JPS55154874A (en) 1979-05-21 1979-05-21 Original reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6158079A JPS55154874A (en) 1979-05-21 1979-05-21 Original reader

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP62199029A Division JPS63126359A (en) 1987-08-11 1987-08-11 Original reader

Publications (1)

Publication Number Publication Date
JPS55154874A true JPS55154874A (en) 1980-12-02

Family

ID=13175202

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6158079A Pending JPS55154874A (en) 1979-05-21 1979-05-21 Original reader

Country Status (1)

Country Link
JP (1) JPS55154874A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60246169A (en) * 1984-05-21 1985-12-05 Matsushita Graphic Commun Syst Inc Recording head

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5122307A (en) * 1974-08-20 1976-02-23 Oki Electric Ind Co Ltd
JPS51113425A (en) * 1975-03-31 1976-10-06 Nippon Telegr & Teleph Corp <Ntt> Optical system for image sensor
JPS5267210A (en) * 1975-12-01 1977-06-03 Toshiba Corp Facsimile transmission equipment
JPS5377119A (en) * 1976-12-20 1978-07-08 Nippon Telegr & Teleph Corp <Ntt> Solid state scanning reader

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5122307A (en) * 1974-08-20 1976-02-23 Oki Electric Ind Co Ltd
JPS51113425A (en) * 1975-03-31 1976-10-06 Nippon Telegr & Teleph Corp <Ntt> Optical system for image sensor
JPS5267210A (en) * 1975-12-01 1977-06-03 Toshiba Corp Facsimile transmission equipment
JPS5377119A (en) * 1976-12-20 1978-07-08 Nippon Telegr & Teleph Corp <Ntt> Solid state scanning reader

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60246169A (en) * 1984-05-21 1985-12-05 Matsushita Graphic Commun Syst Inc Recording head

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