Patent ID: 8606094
Filing Date: 2013-12-10
Classification: H04N

Abstract:
1. A position controller for an optical element, 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 ring which is movable in an optical axis direction of said photographing optical system, wherein said advancing/retracting ring 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 moving member which is supported by said advancing/retracting ring therein to be movable along a first plane orthogonal to said optical axis; an insertable/removable moving member which holds said optical element and is supported by said anti-shake moving member 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 insertion holder which holds said insertable/removable moving member in said insertion position when said photographing optical system is in said ready-to-photograph state; a rear support member which is fixed to said advancing/retracting ring at a position closer to the image plane than said anti-shake moving member, with respect to the optical axis; a removal drive member which is supported by said rear support member to be movable along a second plane orthogonal to said optical axis between an insertion allowance position in which said removal drive member is in noncontact with said insertable/removable moving member in said insertion position, to thereby allow said anti-shake moving member to move in a moving range thereof, and a forced removing position in which said removal drive member comes in contact with and presses said insertable/removable moving member to move said insertable/removable moving member from said insertion position to said removed position; and an insertion/removal controller which holds said removal drive member in said insertion allowance position when said photographing optical system is in said ready-to-photograph state, and moves said removal drive member from said insertion allowance position to said forced removing position when said advancing/retracting ring moves from said first position to said second position.