OPTICO-ELECTRONIC POSITION INDICATOR Russian patent published in 1998 - IPC

FIELD: measurement of coordinates and autotracking. SUBSTANCE: optico-electronic tracking position indicator has stator, rotor mounted on gimbal suspension and incorporating optical system anchored on permanent magnet of rotor and composed of main mirror presenting reflecting layer deposited on surface of permanent magnet of rotor. Surface has curvature corresponding to curvature of main mirror. Indicator also includes correction lens installed in path of rays between main mirror and countermirror behind which spectrum divider is positioned. First and second photodetectors are placed in central holes of correction lens and countermirror so that their light sensitive platforms are matched with focal planes of optical system. EFFECT: improved operational stability and reliability of position indicator. 1 cl, 1 dwg