1. An automated luminaire comprising:a light beam generating light source;
a pair of lenticular lenslet arrays which are mounted to intersect and modulate the light beam;
wherein the lenticular lenslets of one array are shaped so a plurality of convex lenslets of one array nest into a plurality of concave lenslets of the other array;
wherein at least one lenslet array of the pair is articulated to change the separation distance between the lenslet arrays; and
wherein at least one lenslet array of the pair is articulated to rotate about a center of rotation and wherein the center of rotation of the lenslet array is outside the light beam.