Oscillatory scanning system

Claim 1

IN AN OPTICAL SCANNING SYSTEM COMPRISING IN COMBINATION COLLECTING AND BEAM FORMING OPTICAL ELEMENTS AND A DETECTOR FOR OPTICAL RADIATIONS, SAID OPTICAL ELEMENTS BEING IN OPTICAL ALIGNMENT, THE IMPROVEMENT WHICH COMPRISES OSCILLATORY SCANNING MEANS COMPRISING AN OSCILLATORY MEMBER, AT LEAST ONE OF THE ELEMENTS OF THE OPTICAL SYSTEM MOUNTED THEREON, SAID OSCILLATORY MEMBER PIVOTED AT ITS CENTER OF OSCILLATION ON A TORSION BAR, MEANS FOR SECURING THE ENDS OF THE TORSION BAR, THE TORSION BAR COMPRISING FLAT PLATE SECTIONS ON EITHER SIDE OF THE OSCILLATORY MEMBER SAID FLAT PLATE SECTIONS BEING AT RIGHT ANGLES TO EACH OTHER, ARMATURE ELEMENTS ON SAID OSCILLATORY MEMBER AND AN ELECTRICAL OSCILLATING CIRCUIT INCLUDING SAID ARMATURE ELEMENTS AND CAPABLE OF OSCILLATING AT THE MECHANICAL RESONANT FREQUENCY OF THE OSCILLATORY ELEMENT AND TORSION BAR WHEREBY THE OSCILLATORY MEMBER IS PREVENTED FROM ROTATION ABOUT AXES AT RIGHT ANGLES TO EACH OTHER AND AT RIGHT ANGLES TO THE TORSION BAR AXIS.