Slidable fixture positioner

摘要

An apparatus for positioning an object in a remote location with a high degree of precision, insuring stability and repeatability for discrete sampling to be taken at intervals between each sampling on the order of years. A preferred embodiment of the present invention positions an optical probe in a propellant bore hole. The present invention measures and records the exact position of an optical probe within the bore hole, so that exact position may be repeated for future measurements to be taken over the lifetime of the system.