Aperture device for camera has plate with central circular aperture supporting motor-driven overlapping blades which can move in front of fixed aperture to narrow effective aperture

摘要

The aperture device (1) for a camera has a plate with a groove (11) inside a fixed circular rim. The grooved plate has a central circular aperture (12) supporting a set of motor-driven (2) overlapping blades which can move in front of the fixed aperture to narrow the effective aperture. A flat cable (3) may be connected to the motor.