Fabrication of Microlens by Nd:YVO4 laser irradiation of glass frit layers.

Microlens array has a large field of applications: high-speed photography, telecommunication industry that couple light in and out optical fiber waveguides and optical communications, and bio-analysis are some examples [1]. Polymer materials have been widely employed due to low cost to fabricate economical microlens. Nevertheless glasses are much more suitable for high temperature applications or under stronger chemical environments. Moreover, glass materials present a lower UV absorption than polymers. This is an important advantage for bio-analysis applications. [2,3]