A dynamic long-stroke velocity controlled interferometer, comprising: a moving first plane reflector configured to respectively receive and return a first portioned beam of a source along a first optical path length, wherein said moving first plane reflector is coupled to a moving bearing assembly configured to position the front surface of said first plane reflector substantially perpendicular along a longitudinal axis of said moving bearing assembly; a second plane reflector configured to respectively receive and return a second portioned beam of said source along a second optical path length; a moving beam splitter configured with a resilient member coupled about the periphery of said moving beam splitter, wherein said moving beam splitter is adapted for receiving a beam of radiation from said source so as to provide said first and said second portioned beams; and wherein said moving beam splitter is further adapted to move linearly in a direction toward and away but at a predetermined angle to said configured first and second plane reflectors; movement means comprising a plurality of permanent magnets (5a-d) coupled to said moving beam splitter to provide linear and tilt positions of said moving beam splitter; control means for providing a controlled feedback to said movement means of said moving beam splitter and said moving first plane reflector so as to provide adjustment of the linear positions of said moving beam splitter and said moving first plane reflector with a desired steady velocity, wherein said adjusted positions of said moving beam splitter and said moving first plane reflector further enables optical path length differences between said first optical path length and said second optical path length that in combination provide an interrogating interferogram of the input source beam radiation at a configured exit of said interferometer; and a capacitor (C 1) in series with a velocity control signal provided to the moving beam splitter by the control means. a moving first plane reflector configured to respectively receive and return a first portioned beam of a source along a first optical path length, wherein said moving first plane reflector is coupled to a moving bearing assembly configured to position the front surface of said first plane reflector substantially perpendicular along a longitudinal axis of said moving bearing assembly; a second plane reflector configured to respectively receive and return a second portioned beam of said source along a second optical path length; a moving beam splitter configured with a resilient member coupled about the periphery of said moving beam splitter, wherein said moving beam splitter is adapted for receiving a beam of radiation from said source so as to provide said first and said second portioned beams; and wherein said moving beam splitter is further adapted to move linearly in a direction toward and away but at a predetermined angle to said configured first and second plane reflectors; movement means comprising a plurality of permanent magnets (5a-d) coupled to said moving beam splitter to provide linear and tilt positions of said moving beam splitter; control means for providing a controlled feedback to said movement means of said moving beam splitter and said moving first plane reflector so as to provide adjustment of the linear positions of said moving beam splitter and said moving first plane reflector with a desired steady velocity, wherein said adjusted positions of said moving beam splitter and said moving first plane reflector further enables optical path length differences between said first optical path length and said second optical path length that in combination provide an interrogating interferogram of the input source beam radiation at a configured exit of said interferometer; and a capacitor (C 1) in series with a velocity control signal provided to the moving beam splitter by the control means.