METHOD AND DEVICE FOR DETECTING THE OPENING ANGLE OF THE SHUTTER OF AN ADJUSTABLE ROTATING SHUTTER IN A FILM CAMERA

摘要

The invention relates to a method and a device for detecting the opening angle of the shutter (light or dark sector) of an adjustable rotating shutter ( 1 ) arranged in a film camera. Said shutter comprises a circular-segment-shaped or circular-sector shaped shutter wing ( 2 ) which is driven by a shutter motor via a shutter shaft ( 20 ), and also comprises an adjustable shutter adjustment wing ( 3 ) arranged in a coaxial manner in relation to the shutter wing ( 2 ) and which can be displaced in relation to said shutter wing by means of a shutter adjustment wing motor ( 33 ). According to the invention, the position of the shutter wing ( 2 ) and the position of the shutter adjustment wing ( 3 ) are detected during a rotation of the rotating shutter ( 1 ) and the difference between the two positions forms a value for the shutter opening angle or the light or dark sector of the rotating shutter ( 1 ).