A laser beam with flattop intensity is important for many industrial applications such as microlithography, material processing, medical treatment and many more due to its illumination homogeneity and higher resolution.The flat top laser beam shaper is the perfect solution to provide a uniform power distribution from a Gaussian laser source. Using refractive optics, the flat top beam shaper converts a Gaussian laser input beam into a flat top collimated or focused output. Our beam shaper can be used with Nd:YAG (1064nm, 532nm and 355nm) laser sources up to 4.6mm in diameter and CO2 (10.6μm) up to 6mm in diameter. They incorporate a high damage threshold and high efficiency AR coating to guarantee maximum throughput and durability. The flat top beam shaper features an easy to use external focus adjustment with a simple mounting configuration.