Patent ID: 9160905
Filing Date: 2015-10-13
Classification: G03B,H04N

Abstract:
1. An imaging apparatus, comprising: an imaging apparatus main body; a lens barrel comprising an imaging optical system, the lens barrel being attached to the imaging apparatus main body; an imaging element provided in the imaging apparatus main body so as to be opposed to the imaging optical system, for photoelectrically converting an optical image formed by the imaging optical system; a component provided to the lens barrel, for generating magnetic flux by being supplied with an alternating current; and a ferromagnetic member, which is formed of a ferromagnetic material into one of a plate shape and a film shape, and which is arranged between the component and the imaging element so that a part of a flat surface perpendicular to a thickness direction is opposed to the component, wherein the ferromagnetic member has a shape that surrounds the imaging element when viewed from a direction perpendicular to a light receiving surface of the imaging element, wherein the ferromagnetic member has a thickness that is less than a skin depth d, which is determined by Expression 1: where f is a drive frequency of the component, μ is a magnetic permeability of the ferromagnetic material, and σ is an electric conductivity of the ferromagnetic material.