FIELD: physics.
SUBSTANCE: using an integrated periodic optical structure 4, having rational symmetry property, radiation flux 1 is broken into a series of elementary beams 3 and their direction of propagation is changed. The optical structure 4 includes a set of identical optical elements 5 with at least one reflecting surface on each. The reflecting surfaces have the shape of a double curved surface, stretching in the radial direction from the axis of symmetry of the radiation flux, which are bounded by continuous spatial curves 8 passing near the said axis 6, mainly with at least one common point 7 on the said axis of symmetry 6. A family of oblique rays whose focus lies beyond the axis of symmetry, including at infinity, is formed through the said reflecting surfaces in each elementary beam 3.
EFFECT: cutting energy losses during focusing, with simplification of the technology of focusing, including collimation, and the design of apparatus to that end.
6 cl, 5 dwg
