“…Among the several applications of MLAs one can find: in the enhancement of the efficiency of detector arrays (1); in the fabrication of optical components with non-Gaussian imaging properties (2); they are also of interest in digital optical processing where they might be used in array illuminators (3), in various forms as interconnects, in couplers and multiplexers with optical fibers, in retro-reflective screens and to sampling an optical wavefront for adaptive optics and Shack-Hartmann wavefront sensors (4). There are several techniques to implement microlens array such as photoresist melting (5-8), e-beam lithography (9), grayscale lithography (10), optical lithography operating in proximity mode (11,12), UV exposure directly on photosensitive hybrid glass (13,14), anisotropic etching of silicon in a KOH water solution (15), among others. Each technique has its advantages and limitations.…”