FR2256448A1 - Lighting system for reprographic machine with focussing of original - regulates lighting intensity for balance irrespective of document size - Google Patents

Lighting system for reprographic machine with focussing of original - regulates lighting intensity for balance irrespective of document size

Info

Publication number
FR2256448A1
FR2256448A1 FR7433538A FR7433538A FR2256448A1 FR 2256448 A1 FR2256448 A1 FR 2256448A1 FR 7433538 A FR7433538 A FR 7433538A FR 7433538 A FR7433538 A FR 7433538A FR 2256448 A1 FR2256448 A1 FR 2256448A1
Authority
FR
France
Prior art keywords
lighting
balance
focussing
original
document size
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
FR7433538A
Other languages
French (fr)
Other versions
FR2256448B1 (en
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 FR2256448A1 publication Critical patent/FR2256448A1/en
Application granted granted Critical
Publication of FR2256448B1 publication Critical patent/FR2256448B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
    • G03G15/041—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material with variable magnification

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Light Sources And Details Of Projection-Printing Devices (AREA)
  • Variable Magnification In Projection-Type Copying Machines (AREA)

Abstract

The documents are laid on a flat transparent window where it is illuminated by a fixed lighting system and the light transmitted via optics to the photo sensitive surface. The lighting balance will therefore change according to the size of the document. The balance can be regulated by varying the lighting intensity from the source. Variations are achieved by changing the degree of scatter from the reflector units which are an integral part of the optical system. The reflectors are mounted in a plane parallel to the window surface and contain a light screen.
FR7433538A 1973-10-04 1974-10-04 Lighting system for reprographic machine with focussing of original - regulates lighting intensity for balance irrespective of document size Granted FR2256448A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US40335473A 1973-10-04 1973-10-04

Publications (2)

Publication Number Publication Date
FR2256448A1 true FR2256448A1 (en) 1975-07-25
FR2256448B1 FR2256448B1 (en) 1978-11-24

Family

ID=23595467

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7433538A Granted FR2256448A1 (en) 1973-10-04 1974-10-04 Lighting system for reprographic machine with focussing of original - regulates lighting intensity for balance irrespective of document size

Country Status (5)

Country Link
JP (1) JPS5062639A (en)
CA (1) CA1025038A (en)
DE (1) DE2434885A1 (en)
FR (1) FR2256448A1 (en)
NL (1) NL7413148A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54133348A (en) * 1978-04-07 1979-10-17 Canon Inc Slit lighting device
DK160165B (en) * 1987-03-25 1991-02-04 Eskofot As SURFACE ILLUMINATION DEVICE

Also Published As

Publication number Publication date
CA1025038A (en) 1978-01-24
JPS5062639A (en) 1975-05-28
DE2434885A1 (en) 1975-04-10
FR2256448B1 (en) 1978-11-24
NL7413148A (en) 1974-12-30

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Legal Events

Date Code Title Description
ST Notification of lapse