| 摘要 |
PROBLEM TO BE SOLVED: To reduce the reaching amount of magnetic flux which is generated by a coil and reaches an imaging device, by a ferromagnetic member thinner than a conventional ferromagnetic member in thickness.SOLUTION: A camera 100 comprises a ferromagnetic member 102 which is formed like a plate or a film of ferromagnetic material and disposed between a coil 101 and an imaging device 203 such that a portion of a plane surface 102a faces the coil 101. The thickness of the ferromagnetic member 102 is less than a skin depth determined with the drive frequency of the coil 101, the magnetic permeability of the ferromagnetic material, and the electric conductivity of the ferromagnetic material. |
