Patent ID: 9606370
Date: 2017-03-28
CPC Classifications: G02B

Claim:
1. An imaging apparatus comprising: a front lens group which constitutes part of an imaging optical system of said imaging apparatus and is provided at a fixed position with respect to an optical axis direction, wherein said front lens group includes at least one front lens element and a prism, in that order from an object side, and wherein light rays exiting from said front lens element along a first optical axis are reflected by said prism to travel along a second optical axis that is nonparallel to said first optical axis; at least one rear lens group which constitutes another part of said imaging optical system and is provided closer to an image plane than said front lens group; and an anti-shake system which drives said front lens element along a plane orthogonal to said first optical axis, in response to vibrations applied to said imaging optical system, to reduce image shake on said image plane, wherein said anti-shake system comprises: a movable frame which supports said front lens element of said front lens group for movement; and a base member which supports at least said prism of said front lens group, said base member and said prism being stationary relative to the movable frame; at least two opposing guide shafts which are arranged, as viewed along said first optical axis, along opposite sides of said prism on both sides of a reference plane, respectively, in which said first optical axis and said second optical axis lie, to support said movable frame in a manner to allow said movable frame to move to an arbitrary position within a moving range of the movable frame within the plane orthogonal to said first optical axis, relative to said base member.