1. An apparatus, comprising: image relay optics configured to relay a light bundle representing a line image of a subject; an image relay system structured to reflect said light bundle effective to sweep a focused image of said line image across a conventional image plane; a first optical interruption element operable to focus a translated first swept image segment onto an alternative image plane removed from said conventional image plane; and a first image sensor disposed to receive said translated first swept image segment as an input signal comprising said first swept image segment; a second image sensor disposed to receive a second swept image segment as an input signal comprising said second swept image segment, wherein: said second swept image segment is disposed adjacent to said first swept image segment to comprise a substantial continuation in time of an image contained in said first swept image segment; a second optical interruption element disposed between said image relay system and said conventional image plane and operable to focus a translated third swept image segment at an alternative position removed from said conventional image plane; a third image sensor disposed to receive said translated third swept image segment as an input signal comprising said third swept image segment; and wherein said third swept image segment is disposed adjacent to said second swept image segment to comprise a substantial continuation in time of an image contained in said second swept image segment.