quarter plate

listen to the pronunciation of quarter plate
İngilizce - İngilizce
25 inches by 4
a photographic plate measuring 3
25 inches
quarter-wave plate
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