Patent ID: 7167295

Claim:
A method comprising: directing a beam of electromagnetic radiation through a substantially uniform magnetic field, the beam having an axis, the electromagnetic radiation being substantially linearly polarized in a first direction, flux lines of the magnetic field extending in a second direction, the first direction being substantially orthogonal to the second direction; propagating a first portion of the beam through a first material, within the magnetic field, having a first Verdet value, the first portion of the beam being linearly polarized in the first direction after said propagation, a first line extending from the axis of the beam and the first portion of the beam being substantially perpendicular to the first direction; and propagating a second portion of the beam through a second material, within the magnetic field, having a second Verdet value, the second portion of the beam being linearly polarized in a third direction after said propagation, a second line extending from the axis of the beam and the second portion of the beam being substantially perpendicular to the third direction.