(under subclass 244) Subject matter wherein the apparatus or method for sensing and indicating a magnetic field includes a medium which responds to the magnetic field by altering the propagation (e.g., path, passage, etc.) or a property (e.g., polarization) of radiant light energy therethrough, where the output of the medium is representative of the magnetic field measured.
(1) Note. This subclass includes physical changes of the light path affecting the light.
SEE OR SEARCH THIS CLASS, SUBCLASS:
96+, for devices which measure electricity using radiant energy.
SEE OR SEARCH CLASS
250, Radiant Energy,
200+, for photocells, circuits, and apparatus. 356, Optics: Measuring and Testing,
345+, for optical testing by light wave interference.
359, Optics: Systems (Including Communication) and Elements,
280+, for changing a bulk optical parameter by an applied magnetic field.
385, Optical Waveguides,
12+, for environmentally sensing optical waveguides.
