Patent ID: 8717691

Claim:
A lens barrel comprising: a lens group comprising a fixed lens including one or more lenses and an adjustment lens including one or more lenses; a lens frame to hold the lens group, including an adjustment lens frame to hold the adjustment lens and an aligning mechanism to hold the adjustment lens frame movably in a direction orthogonal to an optical axis of the lens group relative to the lens frame; two radial bias elements; two adjusting cams, a first of the adjusting cams being associated with a first of the radial bias elements, and a second of the adjusting cams being associated with a second of the radial bias elements, such that each radial bias element is configured to apply a bias force to the adjustment lens frame to bias the respectively associated adjusting cam, wherein the radial bias elements and the respectively associated adjusting cams, are disposed to oppose each other across the optical axis in a radial direction of the adjustment lens frame, such that the adjustment lens frame is biased in first and second radial directions, wherein the adjustment lens frame is biased along a plane orthogonal to the optical axis, and wherein a position of the adjustment lens frame is configured to be adjusted in the first and second radial directions.