ILLUMINATION SYSTEM Russian patent published in 2010 - IPC F21S2/00 

FIELD: instrument making.

SUBSTANCE: proposed illumination system comprises laser, laser beam splitter and focusing element, all connected optically. Laser beam splitter represents the first plane-parallel glass plate arranged at an angle to laser beam axis. Light-splitting coat is applied on output face of said plate to split incident laser beam into, at least, two beams, while mirror coat is applied onto input face at points whereto beams reflected from light-splitting coat fall. Light-splitting coat is applied in zones of incidence of initial beams and those reflected from mirror coat apart from the last beam coming out of the plate. Note here that inclination angle of the first plane-parallel glass plate is selected to allow spatial separation of outcoming beams, while plate thickness is selected to make optical path difference between whatever outcoming beams exceeding the length of laser radiation coherence.

EFFECT: increased uniformity of illumination over beam section due to diffraction and interference phenomena on optical irregularities and reduced sizes of illumination system.

2 cl, 3 dwg