Position detecting apparatus and image stabilization apparatus to which position detecting apparatus is applied

A position detecting apparatus comprising:

• a fixed member in which one of a magnet and a coil is disposed;
• a movable member including a movable barrel in which an optical element and the other of the magnet and the coil are disposed, the movable barrel being driven in a direction perpendicular to a direction along an optical axis of the optical element with respect to the fixed member by a VCM driving section including the magnet and the coil;
• and
• a magnetism detecting member disposed in the one of the movable member and the fixed member in which the coil is disposed, the magnetism detecting member detecting a change in a magnetic flux density of the magnet at a time when the movable member is driven,
• wherein the magnetism detecting member is disposed, in a plane perpendicular to a direction along the optical axis, in a position where a magnetic flux density of the coil does not affect the change in the magnetic flux density due to the magnet when an electric current is fed to the coil, and
• wherein the magnetism detecting member is disposed on an imaginary line on which a value of a magnetic flux density generated at a time when the electric current is fed to the coil is zero in the direction along the optical axis.

A position detecting apparatus comprising:

• a fixed member in which one of a set of magnets disposed to be opposite to each other and a set of coils disposed to be opposite to each other is disposed;
• a movable member in which an optical element and the other of the set of magnets and the set of coils are disposed, the movable member moving in a plane orthogonal to an optical axis of the optical element;
• and
• a set of magnetism detecting members disposed in the one of the movable member and the fixed member in which the set of coils is disposed, the set of magnetism detecting members detecting a change in a magnetic flux density of each of the magnets of the set of magnets when the movable member is driven,
• wherein the set of magnetism detecting members is disposed on a first imaginary line on which a sum of magnetic flux densities in a direction along the optical axis respectively generated from the coils of the set of coils is zero when electric currents in opposite directions to each other are fed to the set of coils.