US Patent 7116351 Imaging device

An imaging device includes a plurality of plane mirrors disposed into a polygonal pyramid shape, and a plurality of cameras disposed so as to individually face to the plurality of plane mirrors, wherein each of the plurality of cameras includes a lens, and an incident angle of a light beam traveling along an optical axis of the lens of each of the plurality of cameras on the corresponding one of the plurality of plane mirrors is less than 45°. With this configuration, the sizes of the mirrors and the whole size of the imaging device are reduced, to thereby miniaturize the imaging device.