A method of acquiring a vertical section image of lingual fur, and an apparatus to perform the method, the method including generating interfering light from irradiated light and light reflected from a tongue tissue, and generating a partial image corresponding to a relative intensity of the generated interfering light. Accordingly, the magnetic head in a hard disk drive can be defined as the normal head, the low temperature WW head, or the high temperature WW head. The proportion of a stator outer diameter to a stator inner diameter is 1:0. The control system has modules for conducting a targeted marketing campaign utilizing purchase andor redemption information.