Patent ID: 6909546

Claim:
A multipoint lump homogenizing optical system comprising: a homogenizer diffraction optical element (DOE) converting a laser beam having central higher energy density and peripheral lower energy density into a quasi-uniform power distribution beam represented by a 20th-100th order supergaussian function at a definite focus; an aperture mask being laid at the focus of the homogenizer DOE and having a window wider than the quasi-uniform homogenized supergaussian beam, wherein the size of the supergaussian beam is defined as a closed loop made by connecting points at which the beam power falls to exp(−2) of the peak power of the supergaussian beam, a diverging diffraction optical element (DOE) for dividing the homogenized supergaussian beam into a plurality of supergaussian beams; and a lens for converging the branched supergaussian beams on multipoints defined on an image plane laid at a focus of the lens.