Patent ID: 7546029
Filing Date: 2009-06-09
Classification: G02B,G03B

Abstract:
1. A retractable lens system comprising: a linearly movable ring which is guided linearly in an optical axis direction of a photographing optical system, and retracts when said retractable lens system changes from a ready-to-photograph state to a retracted state; a radially-retractable optical element of said photographing optical system, said radially-retractable optical element being supported by said linearly movable ring to be retractable to a radially-retracted position outside of said optical axis from a ready-to-photograph position on said optical axis; an exposure control unit which includes exposure control elements, and is supported by said linearly movable ring to be positioned adjacent to said radially-retractable optical element in said optical axis direction; an exposure control unit recess formed on said exposure control unit to face said radially-retractable optical element when said radially-retractable optical element is in said radially-retracted position, and a retracting device which retracts said radially-retractable optical element from said ready-to-photograph position to said radially-retracted position along said exposure control unit and brings at least a part of a frame of said radially-retractable optical element to enter said exposure control unit recess when said linearly movable ring retracts from a ready-to-photograph position to a retracted position.