Flat Top Beam Shapers are refractive field mapping optical systems that convert collimated Gaussian input beams into collimated flat top beams with a uniform intensity distribution and flat phase front. Due to the field mapping optical design, the even intensity distribution of the converted beam is stable over great distances making it ideally suitable for holography, microscopy, and system integration. With no internal focusing, they are also the perfect solution in applications such as material micromachining, welding, and engraving that require high power lasers. These Flat Top Beam Shapers are offered in different design wavelengths for common YAG, fiber laser, and CO2 laser sources. Each is operating over a definite wavelength range for laser tuning and the use of multiple laser sources.