| 摘要 |
PROBLEM TO BE SOLVED: To provide a lighting system and a lighting method capable of reducing speckles with a compact and simple structure. SOLUTION: This lighting system 20 is equipped with a semiconductor laser 11 as a coherent light source to emit coherent light, a lens array 13 having plural element lenses 22 placed side by side to divide the coherent light emitted from the coherent light source into plural pieces of light flux equivalent to the number of element lenses, and light convergence lenses 14, 15 to converge a plurality of light flux so as to illuminate the almost same area 16 to be irradiated at their focus positions. Thereby, speckles can be reduced in the area to be irradiated.
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