Patent ID: 8619145
Filing Date: 2013-12-31
Classification: G02B,G03B

Abstract:
1. A position controller for an image-stabilizing optical element which is provided in a photographing optical system which moves between a ready-to-photograph state and an accommodated state in which no pictures are taken, said position controller comprising: an advancing/retracting member movable in an optical axis direction of said photographing optical system, wherein said advancing/retracting member is moved between a first position at which said photographing optical system is in said ready-to-photograph state and a second position at which said photographing optical system is in said accommodated state; an anti-shake frame supported by said advancing/retracting member to be movable along a plane orthogonal to said optical axis; an insertable/removable frame which holds said optical element and is supported by said anti-shake frame to be movable between an insertion position in which said optical element is positioned on said optical axis and a removed position in which said optical element is removed from said optical axis; an anti-shake drive mechanism which drives said anti-shake frame to perform an image-stabilizing operation in accordance with vibrations applied to said photographing optical system; and a removal drive mechanism which imposes no limitations on movements of said anti-shake frame and said insertable/removable frame that are caused by said anti-shake drive mechanism in said ready-to-photograph state, and which imparts a component force that makes said insertable/removable frame move to said removed position from a moving force of said advancing/retracting member to move said anti-shake frame in a direction toward said removed position in association with said insertable/removable frame when said advancing/retracting member moves in said optical axis direction from said first position to said second position.