FIELD: lighting and microwave engineering; lights used for producing directional optical radiation fluxes.
SUBSTANCE: proposed microwave exciter has spherical electrodeless lamp disposed in axisymmetrical microwave cavity, at least part of whose wall being made in the form of sphere segment with its center of curvature aligned with center of electrodeless lamp; part of microwave cavity wall made in the form of sphere segment is provided with at least one tube that contacts wall on its external surface end, is normal to sphere segment, is made in the form of below-cutoff waveguide, and is optically coupled with microwave cavity through light-emitting aperture in microwave cavity wall. Part of microwave cavity wall made in the form of sphere segment and provided with at least one tube is made of microwave and opaque solid material and has mirror conducting inner surface. Part of microwave cavity wall made in the form of sphere segment and provided with at least one tube is produced from microwave opaque reticular conducting material with coefficient of translucence ktr1; at least one light-emitting aperture in microwave cavity wall may be covered with reticular conducting material whose coefficient of translucence ktr2 is higher than coefficient ktr1 of microwave cavity wall material.
EFFECT: enhanced local translucence of microwave cavity walls that raises quality of directional light fluxes and yield of useful light output from microwave cavity without losing its microwave opaqueness.
6 cl, 7 dwg
