The description of ideal flux concentrators as shapes that do not disturb the geometrical vector flux field is extended to all the known types of ideal flux concentrators. This is accomplished, in part, by the introduction of vector flux sinks.
© 1981 Optical Society of America
Peretz Greenman, "Geometrical vector flux sinks and ideal flux concentrators," J. Opt. Soc. Am. 71, 777-779 (1981)