Lyot filter

A Lyot filter (polarization-interference monochromator, birefringent filter),^: 106 named for its inventor and French astronomer Bernard Lyot, is a type of optical filter that uses birefringence to produce a narrow passband of transmitted wavelengths.^: 177 Lyot filters are used in astronomy, particularly for solar astronomy, lasers, biomedical photonics and Raman chemical imaging.^{: 2.5.2 : 163 : 5.8.3 : 202 : 327 : 14}