Flat lens
A flat lens formed from an array of cylindrical aluminium rods creates an image (right) of a microwave source (left). In the lower picture the image has followed the 4 cm upward movement of the source.
International Journal of High-Energy Physics
A flat lens formed from an array of cylindrical aluminium rods creates an image (right) of a microwave source (left). In the lower picture the image has followed the 4 cm upward movement of the source.