Image shake correction device for optical apparatus and optical apparatus having image shake correction device

An image shake correction device of an optical apparatus comprising:

• a correction optical system provided in the optical path of the principal optical system;
• a holder being provided movably in the plane approximately perpendicular to the optical axis of the principal optical system for holding said correction optical system;
• and
• a first driving mechanism having an actuator which utilizes shape memory alloy to move said holder and functions to move said holder in the plane approximately perpendicular to the optical axis of the principal optical system in the first direction.

An image shake correction device of an optical apparatus comprising:

• a correction optical system provided in the optical path of the principal optical system;
• a holder for supporting said correction optical system;
• a first driving mechanism having an actuator which utilizes shape memory alloy to move said holder and incline said holder around the first axis in a plane approximately perpendicular to the optical axis of the principal optical system;
• and
• a second driving mechanism having an actuator to move said holder and incline said holder around the second axis, which is different from the first axis, in a plane approximately perpendicular to the optical axis of the principal optical system.

An optical apparatus provided with an image shake correction device comprising:

• a first optical system for taking in an optical image from an object;
• a second optical system for correcting the shake, due to the shake of said optical apparatus, of the optical image taken from said first optical system;
• and
• a driving mechanism having an actuator which utilizes shape memory alloy for driving said second optical system based on the shape change of shape memory alloy.

A method for correcting the image shake in an optical apparatus provided with an image shake correction system comprising the steps of:

• (1) detecting the shake magnitude caused in the optical apparatus;
• (2) calculating the magnitude of displacement of the correction optical system based on the detected shake magnitude of the optical apparatus;
• and
• (3) heating the actuator including shape memory alloy which is a component of the driving mechanism for driving the correction optical system to a temperature determined based on said calculation result.