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Color uniformity in spotlights optimized with reflectors and TIR lenses

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Figure

Fig. 1. Simulated far fields of five different spotlights, (a - d) are TIR lens spotlights, and (e) is  a reflector spotlight, all with multi-colored light engines
Fig. 3. The three setups of the light engine with a 9 mm diameter light-emitting area:  background: (a) with clear cast, (b) low scattering particle density, (c) high scattering particle  density; foreground: far fields of spotlights for each corresponding
Fig. 5. Optimized optics: (a1) plain TIR lens, (a2) TIR lens with rough outer surface, (a3) TIR  lens with lens array (18 × 18), (b1) plain reflector, (b2) reflector with 100 radial and 50 axial  facets, (b3) plain reflector and shell mixer
Table 2. Efficiencies of the optical systems, measured at a spherical far field receiver  around the optical system assuming that the system is encased
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