An imaging system constituted of: an imager； an imager translation mechanism arranged to translate the imager along a predetermined translation axis in each of a first direction and a second direction responsive to a provided electrical power, the second direction opposing the first direction, the predetermined translation axis exhibiting an imaging angle with a floor, the first direction being toward the floor along the translation axis, the imaging angle being less than 90 degrees and greater than 0 degrees； a piston translation mechanism； and a piston power mechanism arranged to provide motive power to the piston translation mechanism, wherein the piston translation mechanism is arranged to translate the imager in the second direction responsive to the provided motive power in the absence of the provided electrical power.
