High-energy efficiency light source with double-layer concentric spherical structure

The invention discloses a high-energy efficiency light source with a concentric spherical structure. The light source is composed of an inner-layer bulb and an outer-layer spherical cover, wherein the inner-layer bulb comprises a high temperature-resisting sapphire bulb shell, a filament and a heating electrode; the outer-layer spherical cover is composed of an inner-reflection hemispherical cover and an inner half-transparent and half-reflecting hemispherical cover; the inner-reflection hemispherical cover reflects light energy from the inner-layer bulb back to the inner-layer bulb; light energy in a lighting band is transmitted through the inner half-transparent and half-reflecting hemispherical cover; infrared light energy beyond the lighting band is also reflected back to the inner-layer bulb; and both the inner-layer bulb shell and the outer-layer spherical cover are spherical and are concentric. The light source system of the invention is high in energy efficiency and is applicable to a remote large-range large-power application situation.