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Hitachi Ltd
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Hitachi Ltd
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Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Priority to JP11771675ApriorityCriticalpatent/JPS5242739A/en
Publication of JPS5242739ApublicationCriticalpatent/JPS5242739A/en
Formation Of Various Coating Films On Cathode Ray Tubes And Lamps
(AREA)
Abstract
PURPOSE: To obtain a filter for correction by exposing to light a photographic film divided into a plurality of small sections through a glass screen having a number of light-transmitting portions arranged at each small section, and varying a quantity of exposure at each small section.
COPYRIGHT: (C)1977,JPO&Japio
JP11771675A1975-10-011975-10-01Method of producing a filter for correcting illumination
PendingJPS5242739A
(en)