Imaging optical system for multi-focus camera

A multi-focus camera comprising a number of imaging units, each of which has an imaging optical system and an imaging device, imaging optical systems of said imaging units being set to form respective focal planes at different distances from said multi-focus camera in a particular shooting space, wherein front depths of field of said imaging optical systems are set to be deep enough to reach those focal planes which are adjacent to and arranged on the camera side of the respective focal planes or a front face of the shooting space, and magnifications of said imaging optical systems are so defined that images of any subjects of the same size are taken in the same size regardless of the position of said focal planes;

• wherein said imaging optical systems satisfy the following condition:
• Lsn−Lsn-1≦Dfn(n≧2)
• wherein Lsn represents a distance from a focal plane that is in the n-th position from the front of the shooting space to an imaging unit that is focused on the n-th focal plane, Dfn represents a front depth of field of the imaging optical system of the imaging unit that is focused on the n-th focal plane;
• and
• wherein said optical systems of said imaging units satisfy the following condition:
• fn=Lsn×m/(m+1)
• wherein m and fn represent a magnification and a focal distance of the imaging optical system of the imaging unit that is focused on the n-th focal plane, respectively.