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JPS56140375A - Image forming device - Google Patents

Image forming device

Info

Publication number
JPS56140375A
JPS56140375A JP4373280A JP4373280A JPS56140375A JP S56140375 A JPS56140375 A JP S56140375A JP 4373280 A JP4373280 A JP 4373280A JP 4373280 A JP4373280 A JP 4373280A JP S56140375 A JPS56140375 A JP S56140375A
Authority
JP
Japan
Prior art keywords
voltage
light
image
polarizer
analyzer
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
JP4373280A
Other languages
Japanese (ja)
Inventor
Nagao Hosono
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
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP4373280A priority Critical patent/JPS56140375A/en
Priority to DE19813113581 priority patent/DE3113581A1/en
Publication of JPS56140375A publication Critical patent/JPS56140375A/en
Pending 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
    • 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)
  • Holders For Sensitive Materials And Originals (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Optical Systems Of Projection Type Copiers (AREA)

Abstract

PURPOSE:To obtain a copy in the form that part of an image is made black or blank by disposing an optical path opening-closing means that can control shutting- off of rays to an arbitrary region of the cross sectional area of an optical path and controlling the original image exposure region arbitrarily by said means. CONSTITUTION:Nichols crossed polarization filters 7, 8 are provided on the respective outer sides of two sheets of plane glasses 1, 2. 7 is used as a polarizer and 8 as an analyzer, respectively, and both 7, 8 are so disposed as to optically orthogonal or parallel each other. Voltage is applied across opposing transparent electrodes 3, 4 by a power source 9. With such constitution, the light L entering the transparent plane glass 1 from the polarizer 7 side sufficiently transmits through the transparent plane glass 2 and is held in the state of going to the analyzer 8 side while no voltage is applied across the electrodes 3, 4, but when the voltage is applied, the light transmission is shut-off. In this way, the application of light to the drum region surface is prevented during exposure by controlling the conduction of electricity, whereby the image which is made partly, for example, blank is obtained.
JP4373280A 1980-04-03 1980-04-03 Image forming device Pending JPS56140375A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP4373280A JPS56140375A (en) 1980-04-03 1980-04-03 Image forming device
DE19813113581 DE3113581A1 (en) 1980-04-03 1981-04-03 Image-generating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4373280A JPS56140375A (en) 1980-04-03 1980-04-03 Image forming device

Publications (1)

Publication Number Publication Date
JPS56140375A true JPS56140375A (en) 1981-11-02

Family

ID=12671948

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4373280A Pending JPS56140375A (en) 1980-04-03 1980-04-03 Image forming device

Country Status (1)

Country Link
JP (1) JPS56140375A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001333853A (en) * 2000-05-26 2001-12-04 Hikkoshisha:Kk Mats for stairs

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001333853A (en) * 2000-05-26 2001-12-04 Hikkoshisha:Kk Mats for stairs

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