FR2345751A1 - Contrast control for electrostatic image of X:ray equipment - has corona ion source to remove high density charge level from image - Google Patents

Contrast control for electrostatic image of X:ray equipment - has corona ion source to remove high density charge level from image

Info

Publication number
FR2345751A1
FR2345751A1 FR7608241A FR7608241A FR2345751A1 FR 2345751 A1 FR2345751 A1 FR 2345751A1 FR 7608241 A FR7608241 A FR 7608241A FR 7608241 A FR7608241 A FR 7608241A FR 2345751 A1 FR2345751 A1 FR 2345751A1
Authority
FR
France
Prior art keywords
image
high density
ion source
charge level
electrostatic image
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.)
Withdrawn
Application number
FR7608241A
Other languages
French (fr)
Inventor
John H Lewis
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.)
Xonics Inc
Original Assignee
Xonics 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 to NL762871D priority Critical patent/NL762871A/xx
Priority claimed from US05/519,998 external-priority patent/US3949222A/en
Priority to DE19762612274 priority patent/DE2612274A1/en
Application filed by Xonics Inc filed Critical Xonics Inc
Priority to FR7608241A priority patent/FR2345751A1/en
Publication of FR2345751A1 publication Critical patent/FR2345751A1/en
Withdrawn legal-status Critical Current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
    • G03G15/045—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 charging or discharging distinct portions of the charge pattern on the recording material, e.g. for contrast enhancement or discharging non-image areas
    • 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
    • G03G15/054—Apparatus for electrographic processes using a charge pattern using X-rays, e.g. electroradiography
    • G03G15/0545—Ionography, i.e. X-rays induced liquid or gas discharge

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)

Abstract

The X-ray analysis system has a source to protect X-rays through a subject and onto a dielectric plate where an electrostatic image is produced. In order to eliminate the otherwise dense background charge pattern, the plate is passed through a special corona discharge station where the dense parts of the image are modulated, while the weaker parts are retained by a suitable bias. The system reduces the amount of toner which clings to the copy sheet after processing and produces sharper copies. An electrically conducting plate (30) is mounted against the open side of a housing (25) with the central electrode wire (27) connected to a high voltage source, typically 6000V.
FR7608241A 1974-11-01 1976-03-22 Contrast control for electrostatic image of X:ray equipment - has corona ion source to remove high density charge level from image Withdrawn FR2345751A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
NL762871D NL762871A (en) 1974-11-01
DE19762612274 DE2612274A1 (en) 1974-11-01 1976-03-19 METHOD FOR INCREASING THE SHARPNESS OF AN ELECTROSTATIC IMAGE AND DEVICE FOR CARRYING OUT THE METHOD
FR7608241A FR2345751A1 (en) 1974-11-01 1976-03-22 Contrast control for electrostatic image of X:ray equipment - has corona ion source to remove high density charge level from image

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US05/519,998 US3949222A (en) 1974-11-01 1974-11-01 Method and apparatus for reducing the density of background areas without affecting the density of picture areas in an electronradiograph
GB10532/76A GB1496748A (en) 1974-11-01 1976-03-16 Electrostatic image enhancement method and system for use in electron radiography
NL7602871A NL7602871A (en) 1974-11-01 1976-03-18 SYSTEM FOR AMPLIFYING AN ELECTROSTATIC IMAGE.
DE19762612274 DE2612274A1 (en) 1974-11-01 1976-03-19 METHOD FOR INCREASING THE SHARPNESS OF AN ELECTROSTATIC IMAGE AND DEVICE FOR CARRYING OUT THE METHOD
FR7608241A FR2345751A1 (en) 1974-11-01 1976-03-22 Contrast control for electrostatic image of X:ray equipment - has corona ion source to remove high density charge level from image

Publications (1)

Publication Number Publication Date
FR2345751A1 true FR2345751A1 (en) 1977-10-21

Family

ID=27510451

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7608241A Withdrawn FR2345751A1 (en) 1974-11-01 1976-03-22 Contrast control for electrostatic image of X:ray equipment - has corona ion source to remove high density charge level from image

Country Status (3)

Country Link
DE (1) DE2612274A1 (en)
FR (1) FR2345751A1 (en)
NL (1) NL762871A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2497953A1 (en) * 1981-01-14 1982-07-16 Agusta Aeronaut Costr Giovanni METHOD FOR PERFORMING NON-DESTRUCTIVE TESTS ON PARTS OF COMPOSITE MATERIAL

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2149751A5 (en) * 1971-08-16 1973-03-30 Zellweger Uster Ag
FR2245016A1 (en) * 1973-09-20 1975-04-18 Siemens Ag

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2149751A5 (en) * 1971-08-16 1973-03-30 Zellweger Uster Ag
FR2245016A1 (en) * 1973-09-20 1975-04-18 Siemens Ag

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2497953A1 (en) * 1981-01-14 1982-07-16 Agusta Aeronaut Costr Giovanni METHOD FOR PERFORMING NON-DESTRUCTIVE TESTS ON PARTS OF COMPOSITE MATERIAL

Also Published As

Publication number Publication date
DE2612274A1 (en) 1977-09-22
NL762871A (en)

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Legal Events

Date Code Title Description
ST Notification of lapse