Light source for high efficiency illumination systems
A light beam and filament technology, applied in the field of lighting systems, can solve problems such as light waste
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[0024] An exemplary embodiment of the present invention in which the light source is an incandescent filament will be described below with reference to FIG. 4 . Fig. 4 shows a view of the monoplanar incandescent filament array of the present invention as viewed from a position perpendicular to the spherical reflector. Referring to Fig. 4, it can be seen that the filament array comprises eight parallel helically wound coil sections. The outer filament section 7 is considerably shorter than the inner filament section 8, while the intermediate section 9, 10 between the outer and inner sections has an intermediate length. And the circle 11 shown in this figure represents the aperture through which the light emitted from this filament array will have to pass. It can be seen that each portion has a length that exceeds the boundaries of the circle. The fraction of the filament that emits light that would not pass through the aperture and would therefore be wasted, corresponding to t...
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