RESONANCE PREVENTION METHOD IN OPTICAL UNIT WITH SHAKE CORRECTION FUNCTION AND OPTICAL UNIT WITH SHAKE CORRECTION FUNCTION

摘要

An optical unit with a shake correction function may include a movable module holding an optical element, a support body including a body part surrounding the movable module, a gimbal mechanism including a movable frame having elasticity and configured to swingably support the movable module between the movable module and the support body, a spring member connected to the movable module and the support body for holding posture of the movable module, and a shake correction drive mechanism configured to swing the movable module. When a natural vibration frequency of the movable frame is “fa”, a natural vibration frequency of the spring member is “fb”, and a vibration frequency band of a movable body on which the support body is mounted is “fw”, the natural vibration frequency “fa” and the natural vibration frequency “fb” are shifted from the vibration frequency band “fw”. Further, it may be preferable that a difference between the natural vibration frequency “fa” and the natural vibration frequency “fb” is set to be 135 Hz or more.

主权项

1. A resonance prevention method in an optical unit with a shake correction function for preventing resonance of a movable module when the optical unit is mounted on a movable body, the optical unit including the movable module holding an optical element, a support body having a body part surrounding the movable module, a gimbal mechanism including a movable frame having elasticity configured to swingably support the movable module between the movable module and the support body, a spring member connected to the movable module and the support body for holding posture of the movable module, and a shake correction drive mechanism configured to swing the movable module,
wherein when a natural vibration frequency of the movable frame is “fa”, a natural vibration frequency of the spring member is “fb”, and a vibration frequency band of the movable body on which the support body is mounted is “fw”, the natural vibration frequency “fa” of the movable frame and the natural vibration frequency “fb” of the spring member are shifted from the vibration frequency band “fw” of the movable body.