The 8051 motorized XY fiber launcher’s unique flexure design doesn't rely on bearings to provide smooth, stictionless motion when coupling light from free-space into multimode fibers. The positioner can be mounted to an optical post or pedestal riser, as well as a flat surface using a threaded 8-32 hole (or M4 for metric versions). A nylon-tipped setscrew secures the fiber chuck for alignment. The Model 9092 coupler body is compatible with this positioner for coupling to microscope objectives.