Radiation emitting apparatus

Details Radiation emitting apparatus Radiation emitting apparatus

F - Mech Eng,Light,Heat,Weapons

21

S

343/70

F21S 8/00 (2006.01)

Patent

CA 1205166

A B S T R A C T RADIATION EMITTING APPARATUS A modulated optical radiation beacon, e.g. a flashing light beacon or an IR emmissive missile jamming source, can comprise a radiation source and two relatively movable apertured masks which, as the apertures thereof move into and out of registration, pass or block the radiation from the source. Herein, to improve the uniformity of the polar distribution of the emitted radiation (assuming, of course, that a uniform distribution is required) or, in other cases, simply to improve efficiency, the apertures of the 'inner' mask, i.e. the one nearest the source, are bounded by curved reflective surfaces defining an optical cavity which at least crudely images the source at a position near the outer mask. Advantageously, the optical cavities are defined by a spaced array of prismatic members having appropriately curved facing surfaces.

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