Converter unit of camera
AssigneeFuji Photo Optical Co., Ltd.
InventorsMinoru Tanaka, Shigeru Yamamoto
Life of this patent
Estimating the term…
Abstract
A converter unit for a lens unit of a camera, which is able to match optical axes of a plurality of kinds of converter lenses with different magnifications, which are revolvably mounted on a rod, with an optical axis of the lens unit properly. One of the converter lenses is revolvably mounted on the rod by two bearings through a connecting member. One of the bearings is attached on an eccentric external circumference of a collar member attached on the rod. The rotation of the collar member adjusts an eccentric direction of the collar member and the direction of an optical axis of the converter lens.
Claims9
A converter unit for a lens unit of a camera, comprising:
- a rod fixed in a body of the converter unit;
- a cylindrical collar member having a hole which extends axially therethrough, an external circumference of the collar member being eccentric relative to the hole, said rod extending through said hole with a portion of said rod being disposed outside of said hole;
- a fixing member enabling fixing of the cylindrical collar member on the rod after adjusting a rotational position of the cylindrical collar;
- a bearing unit having a first bearing mounting section which is disposed on an external circumference of said rod so as to revolve relative thereto, and a second bearing mounting section which is disposed on said external circumference of the collar member so as to revolve relative thereto;
- and
- a converter lens revolvably mounted on the external circumference of the collar member via said second bearing mounting section, the converter lens being revolved to enter and leave an optical path of the lens unit to alter focal length of the lens unit and the rotational position of the cylindrical collar being adjusted to shift an optical axis of the converter lens.
A converter unit for a lens unit of a camera, comprising:
- a cylindrical collar member having a hole which extends axially therethrough, an external circumference of an adjustment section of the collar member being eccentric relative to the hole, the external circumference of the adjustment section of the collar member being supported in a body of the converter unit;
- a rod inserted in the hole of the collar member;
- a bearing unit having a bearing mounting section which is disposed on said external circumference of the collar member so as to revolve relative thereto;
- and
- a converter lens revolvably mounted on the rod via the bearing mounting section, the converter lens being revolved to enter and leave an optical path of the lens unit to alter focal length of the lens unit and the rotational position of the cylindrical collar being adjusted to shift an optical axis of the converter lens.
Dependencies are inferred from the claim text.