An apparatus for inducing a current in a solar cell substrate. A substrate
receiving surface receives the substrate, and an array of a plurality of
individually addressable light sources illuminates the substrate in a
sequenced manner. A sequencer controls the sequenced manner of
illumination of the substrate by the array. A front side electrical
contact makes electrical contact to a front side of the substrate, and a
back side electrical contact makes electrical contact to a back side of
the substrate. A meter is electrically connected to the front side
electrical contact and the back side electrical contact, and senses the
current induced in the substrate during the sequenced illumination of the
substrate.