FR2328278A1 - Correction filter adjusting light intensity distribution - is used in prodn. of colour TV CRT luminescent screens employing opaque strips of differing widths - Google Patents

Correction filter adjusting light intensity distribution - is used in prodn. of colour TV CRT luminescent screens employing opaque strips of differing widths

Info

Publication number
FR2328278A1
FR2328278A1 FR7630991A FR7630991A FR2328278A1 FR 2328278 A1 FR2328278 A1 FR 2328278A1 FR 7630991 A FR7630991 A FR 7630991A FR 7630991 A FR7630991 A FR 7630991A FR 2328278 A1 FR2328278 A1 FR 2328278A1
Authority
FR
France
Prior art keywords
colour
prodn
correction filter
light intensity
intensity distribution
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
FR7630991A
Other languages
French (fr)
Other versions
FR2328278B1 (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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Publication of FR2328278A1 publication Critical patent/FR2328278A1/en
Application granted granted Critical
Publication of FR2328278B1 publication Critical patent/FR2328278B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
    • H01J9/22—Applying luminescent coatings
    • H01J9/227—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines
    • H01J9/2271—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines by photographic processes
    • H01J9/2272—Devices for carrying out the processes, e.g. light houses
    • H01J9/2273—Auxiliary lenses and filters
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/205—Neutral density filters

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
  • Optical Filters (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

The correction filter is used with an illumination device in the making of colour TV shadow masks. The effective surface of the filter is divided in several areas with specified light transmission. Each of the small areas (221) has an opaque strip (311) lying on its surface along one direction, with the rest of the area transparent. The width of the opaque strip (311) is determined from the light transmission required for this area, so that the whole filter (21) has the required light transmission distribution. If r is the fraction of light to be transmitted by the area, then (1-r) is the fraction of the width of the area occupied by the opaque strip.
FR7630991A 1975-10-15 1976-10-14 Correction filter adjusting light intensity distribution - is used in prodn. of colour TV CRT luminescent screens employing opaque strips of differing widths Granted FR2328278A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12329975A JPS5247672A (en) 1975-10-15 1975-10-15 Illuminance correction filter and manufacturing method thereof

Publications (2)

Publication Number Publication Date
FR2328278A1 true FR2328278A1 (en) 1977-05-13
FR2328278B1 FR2328278B1 (en) 1981-03-27

Family

ID=14857091

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7630991A Granted FR2328278A1 (en) 1975-10-15 1976-10-14 Correction filter adjusting light intensity distribution - is used in prodn. of colour TV CRT luminescent screens employing opaque strips of differing widths

Country Status (3)

Country Link
JP (1) JPS5247672A (en)
DE (1) DE2646022A1 (en)
FR (1) FR2328278A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2419556A1 (en) * 1978-03-06 1979-10-05 Wagner Electric Corp VACUUM FLUORESCENCE DISPLAY DEVICE, WITH UNIFORM LUMINOSITY OF CHARACTERS
FR2538611A1 (en) * 1982-12-23 1984-06-29 Rca Corp METHOD FOR THE DEPOSITION, BY PHOTOGRAPHIC ROUTE, OF A TUBE SCREEN STRUCTURE WITH CATHODE RAYS
EP0153002A2 (en) * 1984-01-27 1985-08-28 Unisys Corporation Apparatus for controlling light distribution in line scan optical imaging systems
FR2566542A1 (en) * 1984-06-22 1985-12-27 Videocolor METHOD FOR MANUFACTURING COEFFICIENT FILTER FOR TRANSMITTING VARIABLE LIGHT ON ITS SURFACE
WO1991005364A1 (en) * 1989-10-02 1991-04-18 B.V. Optische Industrie 'de Oude Delft' Method for manufacturing a correction mask for an image intensifier tube of the proximity-focus type having an oblong cathode and anode, and also a method for correcting an image intensifier tube

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5421255A (en) * 1977-07-19 1979-02-17 Matsushita Electronics Corp Manufacture for correction filter for exposure unit and its manufacturing unit
JPS5421256A (en) * 1977-07-19 1979-02-17 Matsushita Electronics Corp Manufacture for correction filter for exposure unit and its manufacturing unit
DE3910520A1 (en) * 1989-04-01 1990-10-04 Gossen Gmbh Method for producing an optical filter for homogenising an inhomogeneously luminescing surface
NL8902442A (en) * 1989-10-02 1991-05-01 Nederland Ptt CLAMP CIRCUIT FOR SIGNALS WHICH PERIODICALLY INCLUDE A REFERENCE AMPLITUDE AND A METHOD OF RESTORING THE DC VOLTAGE LEVEL IN CONSEQUENT STEPS OF AN ELECTRONIC CIRCUIT.
DE3934196C2 (en) * 1989-10-13 1994-01-20 Agfa Gevaert Ag Process for the production of an optical graduated filter, and optical filter produced by this process
DE102015103389A1 (en) 2015-03-09 2016-09-15 Schultheiss Gmbh Method and device for correcting an inhomogeneous intensity distribution of a radiation field generated by a radiation source

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2870010A (en) * 1954-02-04 1959-01-20 Philco Corp Method of manufacturing electrical apparatus
FR2242773A1 (en) * 1973-08-29 1975-03-28 Hitachi Ltd

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2870010A (en) * 1954-02-04 1959-01-20 Philco Corp Method of manufacturing electrical apparatus
FR2242773A1 (en) * 1973-08-29 1975-03-28 Hitachi Ltd

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2419556A1 (en) * 1978-03-06 1979-10-05 Wagner Electric Corp VACUUM FLUORESCENCE DISPLAY DEVICE, WITH UNIFORM LUMINOSITY OF CHARACTERS
FR2538611A1 (en) * 1982-12-23 1984-06-29 Rca Corp METHOD FOR THE DEPOSITION, BY PHOTOGRAPHIC ROUTE, OF A TUBE SCREEN STRUCTURE WITH CATHODE RAYS
EP0153002A2 (en) * 1984-01-27 1985-08-28 Unisys Corporation Apparatus for controlling light distribution in line scan optical imaging systems
EP0153002A3 (en) * 1984-01-27 1986-10-15 Unisys Corporation Apparatus for controlling light distribution in line scan optical imaging systems
FR2566542A1 (en) * 1984-06-22 1985-12-27 Videocolor METHOD FOR MANUFACTURING COEFFICIENT FILTER FOR TRANSMITTING VARIABLE LIGHT ON ITS SURFACE
WO1991005364A1 (en) * 1989-10-02 1991-04-18 B.V. Optische Industrie 'de Oude Delft' Method for manufacturing a correction mask for an image intensifier tube of the proximity-focus type having an oblong cathode and anode, and also a method for correcting an image intensifier tube

Also Published As

Publication number Publication date
DE2646022A1 (en) 1977-04-28
FR2328278B1 (en) 1981-03-27
JPS5748814B2 (en) 1982-10-18
JPS5247672A (en) 1977-04-15

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Legal Events

Date Code Title Description
ST Notification of lapse