A stardust resonant filter is a kind of optical filter that makes use of the resonant properties of sure supplies to selectively replicate or transmit mild of particular wavelengths. This kind of filter is commonly utilized in astronomy to isolate particular spectral strains, such because the hydrogen alpha line, for additional examine.
Stardust resonant filters are sometimes produced from a skinny layer of fabric that’s deposited on a substrate. The fabric is chosen to have a resonant frequency that corresponds to the wavelength of sunshine that’s to be filtered. When mild of this wavelength strikes the filter, it’s absorbed by the fabric after which re-emitted in a particular path. This enables the filter to selectively replicate or transmit mild of a particular wavelength.
