JP2014052429A5

JP2014052429A5 -

Info

Publication number: JP2014052429A5
Application number: JP2012195333A
Authority: JP
Filing date: 2012-09-05
Publication date: 2015-01-15
Anticipated expiration: 2032-09-05

Claims

A lens barrel member that houses the optical system, a zoom mechanism that changes the focal length of the optical system, a focus lens that changes the imaging state of an optical image by the optical system, and a lens holder that holds the focus lens A focus drive unit that supports the lens and a lens holding member, and performs a focus operation by moving the focus lens linearly along the optical axis of the optical system. An optical device in which the wide end is narrower than the tele end,
A guide member for moving the focus driving unit along the optical axis according to a focal length changed by the zoom mechanism;
A movable-side stopper that moves integrally with the guide member and restricts the range of the linear movement by the focus driving unit to a first movable range;
When the guide member is fixed to the lens barrel member side and moved to the wide end position, the movement range of the straight movement of the focus lens is set to a second movable range that is narrower than the first movable range. An optical device comprising a fixed-side stopper for regulating.

The optical device according to claim 1,
The movable side stopper includes a first stopper that restricts movement of the focus lens toward the subject,
A second stopper for restricting movement of the focus lens to the imaging surface side opposite to the subject side;
When the guide member moves to the wide end position, the end position of the second movable range restricted by the fixed stopper is the end position of the first movable range restricted by the second stopper. An optical device disposed closer to the subject than the object.

The optical device according to claim 2 ,
The guide device is an optical device that holds a movable lens that is movable along the optical axis of the optical system and that is disposed closest to the imaging plane.

An optical device according to any one of claims 1 to 3,
Buffer members are interposed between the movable stopper and the lens holding member that contacts the movable stopper, and between the fixed stopper and the lens holding member that contacts the fixed stopper, respectively. Optical device.

The optical device according to claim 4,
The said buffer member is an optical apparatus provided in the said movable side stopper side and the said fixed side stopper side.

The optical device according to claim 4 or 5, wherein
The focus driving unit includes a yoke fixed to the guide member, a magnet fixed to the yoke, and a coil provided in the magnetic field of the magnet and fixed to the lens holding member. A voice coil motor that drives the lens holding member integrated with the coil by passing an electric current;
The lens barrel member has a lens barrel bottom surface portion on the image forming surface side of the optical system, and the lens barrel bottom surface portion moves away from the yoke in the moving direction when the guide member moves to the wide end position. An optical device in which an opening into which a part of the lens is inserted along the moving direction is formed.

An optical device according to any one of claims 1 to 6,
An image pickup device for picking up an optical image obtained through the optical device;
An imaging apparatus comprising:

The imaging apparatus according to claim 7,
The optical apparatus is an imaging apparatus included in an interchangeable lens unit having a connector that is detachable from a camera body including the imaging element.