This paper presents a general formulation of multifaceted mirror configurations for transforming an arbitrary laser beam irradiance pattern into a uniform irradiance pattern. Three configurations are presented and compared. Two of these configurations are new: a strip integrator that reduces manufacturing complexity and an imaging integrator that minimizes deleterious diffraction effects. Aberration effects associated with the relaying or imaging of the irradiance pattern and a novel technique for correction are also discussed.
Fred M. Dickey,
Burton D. O'Neil,
"Multifaceted Laser Beam Integrators: General Formulation And Design Concepts," Optical Engineering 27(11), 271199 (1 November 1988). http://dx.doi.org/10.1117/12.7976799