| 摘要 |
The invention relates to a lamp comprising a lamp bulb ( 1 ), on the surface of which at least one interference filter ( 3 ) is at least partially located, wherein at least this interference filter ( 3 ) comprises several layers, wherein the layer structure comprises alternating layers ( 3.1 ) with a higher refractive index and layers ( 3.2 ) with a lower refractive index, wherein at least the outer layer and/or at least one inner layer of the interference filter ( 3 ) comprises a protective layer ( 4 ) to reduce thermal and/or intrinsic stresses, and wherein the thickness of the protective layer ( 4 ) or protective layers ( 4 ) has a value below 40% of the value of all other layers with the lower refractive index.
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