telecentric

telecentric 

Pertains to an optical system in which its aperture stop is positioned so that the entrance pupil falls in the first focal plane, the exit pupil is at infinity, and the rays through the centre of the entrance pupil from all points on the object are parallel to the axis in the image space. Similarly, if the exit pupil lies in the second focal plane the entrance pupil will be at infinity, and the rays through the centre of the exit pupil will be parallel to the axis in the object space.