Patent ID: 8000002
Filing Date: 2011-08-16
Classification: G02B,Y10S

Abstract:
1. A method for producing a dielectric transmission interference filter, the method comprising: disposing a substrate in an evaporation chamber; alternately depositing layers having a first refractive index and a second refractive index on the substrate, the first refractive index being higher than the second refractive index, wherein the layers are in each case produced by co-evaporation of at least two of the constituents magnesium fluoride, lead fluoride and antimony oxide, and wherein a total of at least 15 layers are deposited one on top of another; and after the deposition of the layers, subjecting the substrate to heat treatment at a temperature of at least 50° C. and irradiating the substrate with ultraviolet (UV) light, wherein there is a decrease in the central wavelength of the transmission window in the transmission of the filter for the central transmission wavelength within a spectral transmission window in the course of irradiation, such that the filter has a transmission window around a wavelength of 365 nanometers after the UV irradiation.