A function indicator for a dual temperature sensor, which indicates the falling off of the sensor from the skin surface of a patient. The reflective surface of the scanner reflects the beams of light towards the reflective inner surface of the dome which in turn collimates the beams of light and reflects them towards an observer positioned within the wide angle display system. A plurality of electromagnet stator segments are mounted on an outer surface of the stator frame. A piston is mechanically attached to an upper portion of the second tubular member and adapted to move axially in relation to the first tubular member. The film structure transforming unit calculates a virtual film structure regarding the internal structure of the periodic structure. The mounting bracket is interposed between parallel vertical stud members.