in a direction orthogonal to

When the sensor is moved in a direction orthogonal to a measurement direction, only weak modulation occurs due to fringing effects.
US Pat. 5434504

Still referring to FIGS. 4 and 5 in conjunction with FIG. 7, bimorph motor 206 vacillate (i.e., oscillate) transducer 208 in a direction orthogonal to normal head motion along head path 35 and as a result the head is constrained to follow a selected data track.
US Pat. 4285017

The isolation mediums may be in the form of a recessed oxide in the semiconductor substrate or as conductive lines forming a field shield in a direction orthogonal to the field shield provided by the adjacent lines.
US Pat. 4021789