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JPS5256853A - Manufacture of exposure correction filter - Google Patents

Manufacture of exposure correction filter

Info

Publication number
JPS5256853A
JPS5256853A JP13214675A JP13214675A JPS5256853A JP S5256853 A JPS5256853 A JP S5256853A JP 13214675 A JP13214675 A JP 13214675A JP 13214675 A JP13214675 A JP 13214675A JP S5256853 A JPS5256853 A JP S5256853A
Authority
JP
Japan
Prior art keywords
manufacture
correction filter
exposure correction
angular aperture
transmittance
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
JP13214675A
Other languages
Japanese (ja)
Inventor
Hiroshi Yokomizo
Shoko Nishizawa
Toshio Ueda
Hidemasa Komoro
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
Priority to JP13214675A priority Critical patent/JPS5256853A/en
Publication of JPS5256853A publication Critical patent/JPS5256853A/en
Pending legal-status Critical Current

Links

Landscapes

  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
  • Optical Filters (AREA)

Abstract

PURPOSE: The angular aperture of the center part is set to 0° or 360°, and transmittance of mesh as well as angular aperture at circumference section is properly selected. As a result, a filter, the transmittance ratio of which can be set to an optional value between the center and circumference sections, can be obtained.
COPYRIGHT: (C)1977,JPO&Japio
JP13214675A 1975-11-05 1975-11-05 Manufacture of exposure correction filter Pending JPS5256853A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13214675A JPS5256853A (en) 1975-11-05 1975-11-05 Manufacture of exposure correction filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13214675A JPS5256853A (en) 1975-11-05 1975-11-05 Manufacture of exposure correction filter

Publications (1)

Publication Number Publication Date
JPS5256853A true JPS5256853A (en) 1977-05-10

Family

ID=15074420

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13214675A Pending JPS5256853A (en) 1975-11-05 1975-11-05 Manufacture of exposure correction filter

Country Status (1)

Country Link
JP (1) JPS5256853A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55102154A (en) * 1979-01-20 1980-08-05 Int Standard Electric Corp Method of fabricating color video tube having light emitting screen and device for executing same
US6447963B2 (en) * 1997-07-17 2002-09-10 Matsushita Electric Industrial Co., Ltd. Method of making a light quantity correction filter and method of manufacturing a color cathode ray tube using the light quantity correction filter made by the method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55102154A (en) * 1979-01-20 1980-08-05 Int Standard Electric Corp Method of fabricating color video tube having light emitting screen and device for executing same
US6447963B2 (en) * 1997-07-17 2002-09-10 Matsushita Electric Industrial Co., Ltd. Method of making a light quantity correction filter and method of manufacturing a color cathode ray tube using the light quantity correction filter made by the method

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