DEVICE FOR ADJUSTMENT OF LIGHT SOURCE Russian patent published in 1994 - IPC

FIELD: electrical industry. SUBSTANCE: device comprises a filament installed in ellipsoid reflector by means of a holder connected with a three-coordinate propulsion device, and a reflecting screen which is perpendicular to reflector optical axis. Reflecting screen is housed in a tubular light-tight casing whose inside diameter is equal to diameter of active surface of ellipsoid reflector secured at one end of casing and which has in the center an axially-movable photocell which is coaxial with the diaphragm aperture. Said diaphragm is positioned in the casing between reflecting screen and reflector in its second focus. Arranged between the diaphragm and reflector is a light-tight axial screen whose diameter is equal to that of light source. The diaphragm and reflecting screen are installed with a provision for axial movement and are provided with catches. The diaphragm surface at the side of the reflecting screen carries four radially-movable photocells arranged symmetrically to the aperture and connected in series by a bridge circuit. The diagonals of the bridge circuit are connected with current meters or the amplifier input of the propulsion device. EFFECT: improved design. 2 cl, 1 dwg