GB2064809B - Light-shield plate exposure correcting device - Google Patents

Light-shield plate exposure correcting device

Info

Publication number
GB2064809B
GB2064809B GB8034637A GB8034637A GB2064809B GB 2064809 B GB2064809 B GB 2064809B GB 8034637 A GB8034637 A GB 8034637A GB 8034637 A GB8034637 A GB 8034637A GB 2064809 B GB2064809 B GB 2064809B
Authority
GB
United Kingdom
Prior art keywords
light
shield plate
correcting device
plate exposure
exposure correcting
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
GB8034637A
Other languages
English (en)
Other versions
GB2064809A (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.)
Canon Inc
Original Assignee
Canon Inc
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
Priority claimed from JP14004479A external-priority patent/JPS5662473A/ja
Priority claimed from JP55133202A external-priority patent/JPS5757083A/ja
Application filed by Canon Inc filed Critical Canon Inc
Publication of GB2064809A publication Critical patent/GB2064809A/en
Application granted granted Critical
Publication of GB2064809B publication Critical patent/GB2064809B/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
    • H04N1/024—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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/72—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus
    • G03B27/722—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus when the reproduction scale is changed
    • 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
    • G03G15/043—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 means for controlling illumination or exposure
    • G03G15/0435—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 means for controlling illumination or exposure by introducing an optical element in the optical path, e.g. a filter

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optics & Photonics (AREA)
  • Optical Systems Of Projection Type Copiers (AREA)
  • Light Sources And Details Of Projection-Printing Devices (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Lenses (AREA)
GB8034637A 1979-10-29 1980-10-28 Light-shield plate exposure correcting device Expired GB2064809B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP14004479A JPS5662473A (en) 1979-10-29 1979-10-29 Corrector for exposure
JP55133202A JPS5757083A (en) 1980-09-24 1980-09-24 Correction device for quantity of exposure light

Publications (2)

Publication Number Publication Date
GB2064809A GB2064809A (en) 1981-06-17
GB2064809B true GB2064809B (en) 1984-05-23

Family

ID=26467612

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8034637A Expired GB2064809B (en) 1979-10-29 1980-10-28 Light-shield plate exposure correcting device

Country Status (3)

Country Link
US (1) US4380390A (forum.php)
DE (1) DE3040569A1 (forum.php)
GB (1) GB2064809B (forum.php)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4495422A (en) * 1981-11-27 1985-01-22 Xerox Corporation Illumination control for raster input scanners
JPS58144853A (ja) * 1982-02-23 1983-08-29 Fuji Xerox Co Ltd 変倍複写機の照度むら補正装置
US4451143A (en) * 1982-04-12 1984-05-29 Jofax Industries, Inc. Combination direct/reverse image copy machine
FR2582683B1 (fr) * 1985-06-03 1988-05-27 Prouvost Sa Dispositif de detection de la variation d'epaisseur d'une etoffe et son procede d'etalonnage
DE3579922D1 (de) * 1985-10-07 1990-10-31 Agfa Gevaert Nv Verfahren zur korrektur eines videoausgangssignals.
EP0392091A1 (en) * 1989-04-11 1990-10-17 Agfa-Gevaert N.V. Method and apparatus for image reproduction
US4959541A (en) * 1989-08-03 1990-09-25 Hewlett-Packard Company Method for determining aperture shape
US5386268A (en) * 1993-07-26 1995-01-31 E. I. Du Pont De Nemours And Company Exposure unit and method for exposing photosensitive materials
JPH09258342A (ja) * 1996-03-25 1997-10-03 Fuji Photo Film Co Ltd 露光装置
US6878922B1 (en) * 1998-12-23 2005-04-12 Hewlett-Packard Development Company, L.P. Optical system for compensating for non-uniform illumination of an object

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3469916A (en) * 1966-10-12 1969-09-30 Dennison Mfg Co Photographic copying apparatus
GB1426097A (en) * 1973-05-23 1976-02-25 Xerox Corp Reflective platen cover
GB1436899A (en) * 1973-05-23 1976-05-26 Xerox Corp Document copying apparatus
US3967894A (en) * 1974-09-18 1976-07-06 Xerox Corporation Screened optical system
IT1085310B (it) * 1977-02-02 1985-05-28 Grafosol Spa Dispositivo di illuminazione e regolazione della quantita' di luce,per macchine per la preparazione di matrici da stampa per via elettrostatica

Also Published As

Publication number Publication date
DE3040569A1 (de) 1981-05-07
US4380390A (en) 1983-04-19
DE3040569C2 (forum.php) 1989-04-20
GB2064809A (en) 1981-06-17

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Effective date: 20001027