THE VARIATION OF THE TRANSMISSION WAVELENGTH OF INTERFERENCE FILTERS BY THE INFLUENCE OF WATER VAPOR

Abstract
The shift of the wavelength of maximum transmission of all dielectric interference filters of the Fabry-Perot type consisting of ZnS and MgF2 layers under the influence of a partial vapor pressure of water was investigated. It was found that under certain conditions the wavelength of maximum transmission can be reproducibly shifted back and forth over a range of about 50 Å without any measurable change of the other optical data such as maximum transmission or half width of the band pass

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