Optical apparatus and image pickup apparatus provided with the optical apparatus
AssigneeCanon Kabushiki Kaisha
InventorAkihiko Masuki
Life of this patent
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Abstract
Provided is an optical apparatus including: two magnets which are constituent components of drive member for moving a lens holder (21); three balls (25); and two bias members (23) for applying biases such that hook portions disposed in one and the other ends of each of the two bias members are engaged with a base member (28) and the lens holder, respectively, and the three balls are held between the base member and the lens holder. Two magnets (22A and 22B), the three balls, and the two bias members are arranged so that a center of gravity within a plane of the base member, a lens, and the two magnets is positioned in a triangle formed by the three balls, and a line segment within a plane formed by the two bias members steps over two sides of the triangle.
Claims7
An optical apparatus, comprising:
- a base member;
- a lens holder which holds a compensation lens to compensate for image blurring by moving the compensation lens in a direction not parallel to an optical axis, wherein the lens holder has two hook engaging portions;
- a drive unit configured to move the lens holder with respect to the base member;
- three balls arranged between the base member and the lens holder, wherein the three balls are arranged so that a center of gravity of the lens holder is positioned within a triangle formed by the three balls, when an optical axis of the compensation lens is in a position matching the optical axis of another lens of the optical apparatus, and
- two springs configured to bias the lens holder toward the base member, wherein the two springs are arranged in a manner that a line segment interconnecting the hook engaging portions intersects two sides of the triangle when seen from a direction of the optical axis of the compensation lens.
Dependencies are inferred from the claim text.