a radiation scanning system comprises scan mirrors optically coupled together by means of a spherical reflector to relay the scan mirror pupils through the optical path with minimal pupil shift for both wide and narrow field - of - view applications . the mirrors may oscillate at a predetermined fundamental frequency and a hamonic thereof to achieve near linear line scans or both line scan mirrors may oscillate at the predetermined fundamental frequency to achieve wider scan angles . in another embodiment , a line scan mirror is mounted on a multi - mode resonant scanner and phase lock oscillated at multiple frequencies while a second scan mirror functions as the field or line scanning element . in yet another embodiment , one line scan mirror is mounted on a non - turnable resonant scanner while a second scan mirror functions as the field scanning element . general compatibility with tv formatted systems can be achieved through self resonance or by controlling the fundamental line scan frequency through an external master clock . the line scan mirrors can operate at a predetermined fundamental frequency which is a fraction of the standard tv line frequency . system scanners may be passive , active or combinations thereof , and can operate in the ultraviolet , visible , or infrared spectrums .