Imaging apparatus, and system and distance measuring device using imaging apparatus

An imaging apparatus, comprising:

• a lens optical system including a lens and a stop;
• an imaging device on which light passing through the lens optical system is incident;
• and
• an array-form optical element located between the lens optical system and the imaging device and including a plurality of optical components extending in a row direction in a plane vertical to an optical axis of the lens optical system, the plurality of optical components being arrayed in a column direction in the plane;
• wherein:
• the imaging device includes a plurality of pixel groups arrayed in the column direction, each of which includes a plurality of first pixels arrayed in the row direction and a plurality of second pixels arrayed in the row direction at positions adjacent, in the column direction, to the plurality of first pixels;
• and
• border positions between the plurality of optical components are respectively offset in the column direction with respect to corresponding border positions between the plurality of pixel groups.