INTERFERENCE FILTER WITH DIELECTRIC TUNING LAYERS
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Abstract
A THREE REFLECTOR INTERFERENCE FILTER IN WHICH THE TWO SPACER ELEMENTS USED TO SEPARATE THE REFLECTORS ARE MADE OF SOLID GLASS. THE TWO OUTER REFLECTORS ARE MULTILAYER DIELECTRIC FILMS AND ARE FORMED ON SEPARATE SUBSTRATES. THE OUTER ENDS OF THE TWO SPACER ELEMENTS ARE OPTICALLY CONTACTED TO THE SUBSTRATES. THE INNER ENDS OF THE SPACER ELE-
MENTS ARE OPTICALLY CONTACTED TO EACH OTHER. THE INNER REFLECTOR, WHICH IS A METAL FILM IS FORMED ON THE INNER END OF ONE OF THE SPACERS.
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