US 10,120,201 B2 · Lens barrel and optical device

Abstract

A lens barrel that is capable of reducing unnecessary movement of an optical element. A first unit has a first correction optical element arranged on an optical axis and a first magnet that moves the first correction optical element along a first spherical surface around a first point on the optical axis. A second unit has a second correction optical element arranged on the optical axis and a second magnet that moves the second correction optical element along a second spherical surface of which radius is smaller than the radius of the first spherical surface around a second point on the optical axis. A magnetic body is arranged on at least one of the first unit and the second unit, and reduces leakage of magnetic flux from a facing part of the second magnet that faces the first magnet.

Claims16

Dependent claims

A lens barrel comprising:

a first unit configured to have a first correction optical element arranged on an optical axis, and a first magnet that moves the first correction optical element along a first virtual spherical surface with a first radius around a spherical center thereof on the optical axis;
a second unit configured to have a second correction optical element arranged on the optical axis, and a second magnet that moves the second correction optical element along a second virtual spherical surface with a second radius smaller than the first radius around a spherical center thereof on the optical axis;
and
a magnetic body configured to be arranged on at least one of said first unit and said second unit, and to reduce leakage of magnetic flux from a facing part of the second magnet that faces the first magnet.

1 more element

Dependencies are inferred from the claim text.

Lens barrel and optical device

Life of this patent

Lens barrel and optical device

Life of this patent

Abstract

Claims16