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JPS56112180A - Multitone wedge reading out device - Google Patents

Multitone wedge reading out device

Info

Publication number
JPS56112180A
JPS56112180A JP1470580A JP1470580A JPS56112180A JP S56112180 A JPS56112180 A JP S56112180A JP 1470580 A JP1470580 A JP 1470580A JP 1470580 A JP1470580 A JP 1470580A JP S56112180 A JPS56112180 A JP S56112180A
Authority
JP
Japan
Prior art keywords
light
kinds
fluorescent lamp
picture
signal
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
JP1470580A
Other languages
Japanese (ja)
Other versions
JPS6257138B2 (en
Inventor
Fujio Moriguchi
Haruhiko Moriguchi
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 Business Innovation Corp
Original Assignee
Fuji Xerox 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 Xerox Co Ltd filed Critical Fuji Xerox Co Ltd
Priority to JP1470580A priority Critical patent/JPS56112180A/en
Publication of JPS56112180A publication Critical patent/JPS56112180A/en
Publication of JPS6257138B2 publication Critical patent/JPS6257138B2/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
    • H04N1/40—Picture signal circuits
    • H04N1/40056—Circuits for driving or energising particular reading heads or original illumination means

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)

Abstract

PURPOSE:To make it possible to obtain a picture of (n+1) tone wedges in a facsimile and so on by using (n) kinds of binary signals obtained by irradiating one scanning line of a draft to be read out with (n) kinds of different luminous source intensity. CONSTITUTION:The picture image of draft 1 is irradiated by fluorescent lamp 2. Light quantity sensor 4 detects the quantity of light of fluorescent lamp 2 and outputs an electric signal corresponding to the detected quantity of light to light quantity detecting circuit 5. Circuit 5 generates an electric signal when the quantity of light of fluorescent lamp 2 consists with the value which has been previously set up and excitates solid scanning light photodetecting element 7 to make a picture signal generate. Circuit 5 has plural thresholds for the quantity of light of fluorescent lamp 2 and the necessary threshold is decided according to the sensitivity of element 7. Video amplifier discriminator 8 amplifies the analog picture signal read by element 7, discriminates the signal within a fixed threshold and outputs a binary signal. Thus, a picture image having 3 tone wedges can be obtained by 2 kinds of binary signals obtained by irradiating a draft with 2 kinds of luminous source intensity.
JP1470580A 1980-02-12 1980-02-12 Multitone wedge reading out device Granted JPS56112180A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1470580A JPS56112180A (en) 1980-02-12 1980-02-12 Multitone wedge reading out device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1470580A JPS56112180A (en) 1980-02-12 1980-02-12 Multitone wedge reading out device

Publications (2)

Publication Number Publication Date
JPS56112180A true JPS56112180A (en) 1981-09-04
JPS6257138B2 JPS6257138B2 (en) 1987-11-30

Family

ID=11868583

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1470580A Granted JPS56112180A (en) 1980-02-12 1980-02-12 Multitone wedge reading out device

Country Status (1)

Country Link
JP (1) JPS56112180A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0233003U (en) * 1988-08-25 1990-03-01

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4965723A (en) * 1972-10-25 1974-06-26
JPS54107210A (en) * 1978-02-10 1979-08-22 Ricoh Co Ltd Abnormity detection system for reading light source

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4965723A (en) * 1972-10-25 1974-06-26
JPS54107210A (en) * 1978-02-10 1979-08-22 Ricoh Co Ltd Abnormity detection system for reading light source

Also Published As

Publication number Publication date
JPS6257138B2 (en) 1987-11-30

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