Multi-stage lyot filter and method

摘要

According to an embodiment of the disclosure, a multi-stage Lyot filter (102) comprises a plurality of prisms (202, 204, 302), a polarizing block (206, 206a, 206b), and a non-rotating, single-adjustment birefringent element (208). Each of the prisms is configured to receive light and to reflect the light. The polarizing block (206) is configured to provide polarization discrimination of the light. The birefringent element is configured to tune the Lyot filter (102). The prisms are further configured to pass the light through the birefringent element multiple times.