Abstract: An electric current measurement apparatus for measuring an electric current flowing in a conducting wire in a circuit to be measured, the electric current measurement apparatus characterized by having a magnetic element to which a drive electric current terminal and a measurement voltage terminal are provided, a holder for fixing a positional relationship of the conducting wire to a magnetic body, an electric current source capable of outputting at least one frequency of alternating electric current across the drive electric current terminal, a voltage meter for measuring a voltage across the measurement voltage terminal, and a low-pass filter provided between the measurement voltage terminal and the voltage meter.

Abstract: A motion detection imaging device comprises: plural optical lenses for collecting light from an object so as to form plural single-eye images seen from different viewpoints; a solid-state imaging element for capturing the plural single-eye images formed through the plural optical lenses; a rolling shutter for reading out the plural single-eye images from the solid-state imaging element along a read-out direction; and a microprocessor for detecting movement of the object by comparing the plural single-eye images read out from the solid-state imaging element. The plural optical lenses are arranged so that the positions of the plural single-eye images formed on the solid-state imaging element are displaced from each other by a predetermined distance in the read-out direction, and so that the respective single-eye images formed on the solid-state imaging element partially overlap each other in the read-out direction.