RADIATOR Russian patent published in 2001 - IPC

FIELD: optics. SUBSTANCE: radiator includes optical element with two working surfaces made of material transparent in working spectral range. One surface is mirror reflecting surface and the other surface is output transparent surface with anti-reflecting coat and central zone that has optical properties different from those of peripheral parts. Radiation source with radiation plane facing output surface is installed in volume of optical element on its optical axis and in focus. In this case forms of surfaces are mutually matched with due account of relations 0≤β≤2π, where β is solid angle in which radiation of source propagates, γ → 0, where γ is angle of divergence of output radiation. Central zone of output surface of optical element comes in the form of beam splitter and diameter of beam splitter is so chosen that radiation of source falls on it at angle less than angle of total internal reflection. EFFECT: possibility of change of radiation pattern without change of forms of optical surfaces, enhanced stability to effects of unfavorable atmospheric conditions. 1 cl, 3 dwg