JPS56140375A - Image forming device - Google Patents
Image forming deviceInfo
- 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
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.
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001333853A (en) * | 2000-05-26 | 2001-12-04 | Hikkoshisha:Kk | Mats for stairs |
-
1980
- 1980-04-03 JP JP4373280A patent/JPS56140375A/en active Pending
Cited By (1)
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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