1. Field of the Invention
The present invention relates to an optical apparatus such as an image pickup apparatus like a video camera or a digital still camera and an interchangeable lens apparatus.
2. Related Background Art
Many image pickup apparatuses and interchangeable lens apparatuses are equipped with a shake correction apparatus in which a lens is moved in a direction(s) orthogonal to the optical axis to bend the optical axis of the photographing optical system to thereby correct image shake caused, for example, by hand-shake.
There is a known type of such a shake correction apparatus that is constructed in such a way that a part of the shake correction apparatus laps over another movable lens frame or a part of another movable lens frame laps over a part of the shake correction apparatus in a plane orthogonal to the optical axis to utilize the interior space of the lens barrel efficiently, as disclosed in U.S. Pat. No. 6,008,954. In such a shake correction apparatus, a driving force generating portion such as a magnet or a coil is generally disposed coplanar with the driven glass with respect to directions orthogonal to the optical axis.
However, in cases where a light amount adjusting unit is disposed on the inside of the driven glass, disposing a coil or a magnet on the outisde of the light amount adjusting apparatus to avoid interference therewith will lead to an undesirable increase in the diameter of the shake correction apparatus.
USPTO Backgrounds
USPTO Backgrounds