quarter-wave plate

Definition from Wiktionary, the free dictionary
Jump to: navigation, search



quarter-wave plate (plural quarter-wave plates)

  1. (physics) a sheet of birefringent material whose thickness is such that the light associated with the larger refractive index is retarded in phase by 90° with respect of that associated with the smaller refractive index; used to convert linearly polarized light into circularly polarized light