FIELD: optics.
SUBSTANCE: beam former intends for using together with one or more individual quazi-monochrromatic light sources. Beam former is made of essentially transparent material in form of transmitting element influencing on propagation of light to receive light beam or beams having round, elliptical, collimated, converging, diverging or/and other shape. Transmitting element of beam former which directs beam or beams of light, is provided with structure made at least partially of binary diffraction gratings with surface relief. Local periods d(r) of gratings, where r is distance from optical axis of beam former, are optimized at longitudinal and lateral directions as well as in relation to optical axis, essentially, according to Bragg's diffraction geometry to provide maximal efficiency of diffraction.
EFFECT: maximal efficiency of beam modification; ability of creating of simple, efficient optical systems with prolonged service life.
12 cl, 12 dwg
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