GB1500544A - Copying apparatus and method - Google Patents

Copying apparatus and method

Info

Publication number
GB1500544A
GB1500544A GB1415275A GB1415275A GB1500544A GB 1500544 A GB1500544 A GB 1500544A GB 1415275 A GB1415275 A GB 1415275A GB 1415275 A GB1415275 A GB 1415275A GB 1500544 A GB1500544 A GB 1500544A
Authority
GB
United Kingdom
Prior art keywords
laser beam
photosensor
document
scanned
laser
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.)
Expired
Application number
GB1415275A
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.)
Xerox Corp
Original Assignee
Xerox Corp
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 Xerox Corp filed Critical Xerox Corp
Publication of GB1500544A publication Critical patent/GB1500544A/en
Expired 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
    • 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
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/207—Simultaneous scanning of the original picture and the reproduced picture with a common scanning device

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Fax Reproducing Arrangements (AREA)
  • Facsimiles In General (AREA)
  • Facsimile Transmission Control (AREA)
  • Laser Beam Printer (AREA)

Abstract

1500544 Facsimile apparatus XEROX CORP 7 April 1975 [8 April 1974] 14152/75 Heading H4F A xerographic facsimile transceiver of the type described in Specification 1,429,161 in which a mirror 31 is selectively positioned in a scanned laser beam to deflect the beam to scan a document via slit 14, the reflected light being detected by a photosensor 39, and in which with the mirror 31 out of the scanned laser beam path the laser beam (now modulated) is scanned over a xerographic drum 16, is provided with the added feature of a beam splitter 26 which when inserted in the scanned laser beam path converts the facsimile transceiver into an office document copier with the video signal obtained from the photosensor 39 fed back to modulate the laser or laser beam while it is simultaneously scanning both the document to be copied and the xerographic drum 16. The photosensor output video signal is applied to the inverting input of an operational amplifier to the non-inverting input of which a reference signal is applied, the resulting difference signal being applied to modulate the laser or the laser beam so that the intensity of the light reflected by the document on to the photosensor is maintained substantially constant.
GB1415275A 1974-04-08 1975-04-07 Copying apparatus and method Expired GB1500544A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US45896674A 1974-04-08 1974-04-08

Publications (1)

Publication Number Publication Date
GB1500544A true GB1500544A (en) 1978-02-08

Family

ID=23822833

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1415275A Expired GB1500544A (en) 1974-04-08 1975-04-07 Copying apparatus and method

Country Status (6)

Country Link
JP (1) JPS5833747B2 (en)
CA (1) CA1029310A (en)
DE (1) DE2521089C3 (en)
FR (1) FR2312146A1 (en)
GB (1) GB1500544A (en)
NL (1) NL7505849A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0048118A2 (en) * 1980-09-15 1982-03-24 Texas Instruments Incorporated Facsimile design
EP0104662A2 (en) * 1982-09-29 1984-04-04 International Standard Electric Corporation Method and apparatus for transferring information signals to and/or off a recording medium

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4087838A (en) * 1975-07-25 1978-05-02 Canon Kabushiki Kaisha Apparatus for obtaining a light carrying information therewith
JPS5453915A (en) * 1977-10-07 1979-04-27 Canon Inc Facsimile unit
JPH0771188B2 (en) * 1985-06-17 1995-07-31 キヤノン株式会社 Equipment
JP2559783Y2 (en) * 1991-05-31 1998-01-19 ティーディーケイ株式会社 8mm video tape cassette

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2985063A (en) * 1957-03-15 1961-05-23 Rca Corp Composite photography
CH453878A (en) * 1965-02-12 1968-03-31 Gretag Ag Photographic reproduction process and apparatus for carrying out the process

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0048118A2 (en) * 1980-09-15 1982-03-24 Texas Instruments Incorporated Facsimile design
EP0048118A3 (en) * 1980-09-15 1985-01-02 Texas Instruments Incorporated Facsimile design
EP0104662A2 (en) * 1982-09-29 1984-04-04 International Standard Electric Corporation Method and apparatus for transferring information signals to and/or off a recording medium
EP0104662A3 (en) * 1982-09-29 1986-08-06 International Standard Electric Corporation Method and apparatus for transferring information signals to and/or off a recording medium

Also Published As

Publication number Publication date
NL7505849A (en) 1976-11-18
JPS50137017A (en) 1975-10-30
DE2521089C3 (en) 1980-11-20
DE2521089B2 (en) 1980-04-03
FR2312146A1 (en) 1976-12-17
FR2312146B1 (en) 1979-03-23
CA1029310A (en) 1978-04-11
DE2521089A1 (en) 1976-11-25
JPS5833747B2 (en) 1983-07-21

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee