Single aspherical lens for de-astigmatization, collimation and circularization of laser beam

Abstract

In this report, a single aspherical lens has been designed to transform an astigmatic and elliptically diverging laser diode beam into a non-astigmatic and circularly collimated beam with a pre-determined output beam radius. The longitudinal and transverse input surfaces were designed and used as astigmatism correction, whereas the output surfaces were designed and used as collimation and circularization of the transmitted laser beam.