Patent ID: 6226124
Filing Date: 2001-05-01
Classification: G02B,G03B

Abstract:
A tremble correcting device comprises:a detector that detects a trembling amount of an optical device;a correcting optical system that corrects a tremble of a focused image due to said optical device tremble; anda driving system that includes a stepping motor and a transmitting mechanism, disposed between said stepping motor and said correcting optical system, that converts a rotational movement of said stepping motor to a movement of said correcting optical system, said driving system driving said correcting optical system by a predetermined amount per one step; anda controlling system that controls said driving system such that, when a difference between said trembling amount detected by said detector and a position data of said correcting optical system, calculated based on a one step driving amount of said driving system, reaches a predetermined threshold, said driving device is driven to cancel said difference by controlling a driving electric current flowing in a coil of said stepping motor;wherein, when said difference is less than said predetermined threshold, said coil is electrically de-energized by said controlling system; anda driving circuit that controls said driving electric current; anda switch that switches an electrical power supply to said driving circuit;wherein said controlling system controls said switch, so that said electrical power supply is one of started and stopped.