Array of Distributed-Index Planar Micro-Lenses Prepared from Ion Exchange Technique

Abstract

A new class of arrayed distributed-index planar micro-lenses on a planar glass substrate has been monolithically fabricated. Each lens is with 1.2 mm in diameter and measured focal length is 9.4 mm. The minimum light spot which has been focused by the lens is as small as 17 µm which is almost limited by the diffraction. Clear images have been formed with a 5×5 lens array.