TurnCheck systems are precision optical instruments that measure shafts, cylinders, and other turned, ground, or extruded parts in the most demanding shop floor environments. The fully telecentric large field of view optics combined with highly collimated light at a constant wavelength results in a crisp, uniformly magnified image with no edge effects or exclusion zones. TurnCheck systems scan and measure all points and features automatically, handling the full range of dimensions and tolerances found on shafts and cylinders.