Image scanning apparatus and method

The image scanning apparatus includes a plurality of imaging sensors for generating image data; a focusing system and a scanning system. The focusing system defines an optical axis and directs light received from a target onto the imaging sensor. Each imaging sensor is positioned relative to the focusing system such that light directed to the imaging sensor has a different optical focusing level relative to the target than each other imaging sensor and receives light from a position on the target relative to the optical axis that is different than a respective position of each other imaging sensor. The focusing system includes an optical path adjuster to produce a first optical path between the optical path adjuster and at least one of the plurality of imaging sensors and a second optical path between the optical path adjuster and at least one of the imaging sensors, wherein the first optical path is different from the second optical path. The scanning system is arranged, in use, to move the target relative t