According to one embodiment, a coupler apparatus includes a coupling element and a ground plane. The remote sensing unit is placed sufficiently far from the wellbore to reduce or eliminate effects that the wellbore might have on formation data samples taken by the remote sensing unit. The system is principally designed to be included as part of Dual Pass Rough Cull System for the collection and detection of the residue when the contaminated mail piece first enters a mail facility and before it is intermingled with other mail pieces. The supporting cables are connected to one another by spaced-apart retaining frames, on which the supporting cables for the running rollers are fastened. If that behavior is one that is a candidate for optimization, signaling optimization is performed between the application and the content server. An optical element is inserted into the optical axis of the imaging optical system to correct for any change in the image-formation position when the optical-path splitter is retracted from the optical path of the imaging optical system during imaging.