Patent ID: 6295164
Filing Date: 2001-09-25
Classification: B82Y,G03F,G21K

Abstract:
A multi-layered mirror comprising:a substrate;at least one first layer of a first substance; andat least one second layer of a second substance,wherein the at least one first layer and the at least one second layer are alternately laminated on the substrate, andwherein a difference between a refractive index of the first substance in a utilized wavelength and that in a vacuum is large, and a thickness of the first layer is determined based on the utilized wavelength and the refractive index of the first substance, andwherein a difference between a refractive index of the second substance in the utilized wavelength and that in a vacuum is small, and a thickness of the second layer is determined based on the utilized wavelength and the refractive index of the second substance, andwherein, for at least one pair of two adjacent first and second layers, at least one of the layers within the pair has a multi-layered structure formed by alternately laminating at least two substances to the thickness of the one layer within the pair, the at least two substances having real parts of complex indices of refraction in the utilized wavelength that are approximately the same.