| 摘要 |
An illuminator includes a laser light source that irradiates laser light, a switch element that switches over between exiting optical paths of the laser light entered, and a plurality of diffusion-illuminating elements that allow the laser light entering through the exiting optical path to exit with diffusion. The plurality of diffusion-illuminating elements are to be superimposed together at least in a part of respective ones of exiting light thereby illuminating an illumination area.
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