Astronomy   View all facts   Glossary   Help

physical object > artifact > device > instrument > optical device > wavefront modifier > spectrograph dispersing element > interference filter

interference filter comparison table

Subject	is a kind of	has definition
spectrograph dispersing element	wavefront modifier	The part of a spectrograph which disperses the light into component colors
interference filter	spectrograph dispersing element	A method of constructing an optical filter to select a particular wavelength band for transmission and reject wavelengths outside this band. Similar to a Fabry-Perot etalon. The construction relies on constructive and destructive interference effects in a multilayer stack of quarter-wave reflective layers and half-wave spacer layers.

Next spectrograph dispersing element: objective prism    Up: spectrograph dispersing element    Previous spectrograph dispersing element: Fabry-Perot interferometer