Patent ID: 8396358
Filing Date: 2013-03-12
Classification: G02B,G03B,H04N

Abstract:
1. An optical device having an image-stabilizing insertable/removable optical element, comprising: an advancing/retracting member which is movable in an optical axis direction of a photographing optical system including said image-stabilizing insertable/removable optical element and includes a first orthogonal guide surface which is orthogonal to said optical axis, wherein said advancing/retracting member is moved in said optical axis direction between a ready-to-photograph position and an accommodated position, in which no pictures are taken; an anti-shake frame including a second orthogonal guide surface, which is parallel to and faces said first orthogonal guide surface, said anti-shake frame being supported by said advancing/retracting member to be movable along both said first orthogonal guide surface and said second orthogonal guide surface; an insertable/removable frame which holds said image-stabilizing insertable/removable optical element and is supported by said anti-shake frame to be rotatable between an insertion position in which said image-stabilizing insertable/removable optical element is positioned on said optical axis and a removed position in which said image-stabilizing insertable/removable optical element is removed from said optical axis; a clearance through-hole formed through said anti-shake frame so as to allow said insertable/removable frame to move between said insertion position and said removed position with at least part of said image-stabilizing insertable/removable optical element positioned in said clearance through-hole, wherein said clearance through-hole includes a circular arc groove about a rotational center of said insertable/removable frame and wherein an outer end of said clearance through-hole is formed as an open end; and a bridge portion formed on said anti-shake frame to connect opposed inner walls of said clearance through-hole, wherein said bridge portion is offset toward the opposite side of said anti-shake frame relative to said second orthogonal guide surface and overlaps said clearance through-hole, as viewed in said optical axis direction.