Mechanism for controlling position of optical element
AssigneeHoya Corporation
InventorHiroshi Nomura
Life of this patent
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Abstract
An optical element position control mechanism includes an optical element holding member which holds an optical element of a photographing system and is guided in an optical axis direction; a drive mechanism for moving the optical element holding member in the optical axis direction; and a biasing device including an arm which is swingable about a swing axis, the swing axis being substantially orthogonal to the optical axis, and the arm extending substantially orthogonal to the swing axis and having a free end portion which engages with the optical element holding member to bias the optical element holding member in the optical axis direction.
Claims18
An optical element position control mechanism comprising:
- an optical element holding member which holds an optical element of a plurality of optical elements of a photographing system and is guided in an optical axis direction;
- a drive mechanism for moving said optical element holding member in said optical axis direction;
- a biasing device including an arm which is swingable about a swing axis, said swing axis being substantially orthogonal to said optical axis, and said arm extending substantially orthogonal to said swing axis and having a free end portion which engages with said optical element holding member to bias said optical element holding member in said optical axis direction;
- and
- a rotational ring that rotates to move at least one of said optical element elements, wherein said rotational ring is provided separately from said optical element, and wherein said drive mechanism and biasing device are positioned radially outside said rotational ring.
Dependencies are inferred from the claim text.