| 摘要 |
Embodiments of illumination-based medical devices capable of projecting a holographic symbol are herein provided. In one embodiment, an illumination-based medical device incorporates at least a laser and a diffractive optical element within a housing. In one embodiment, the diffractive optical element may be a holographic optical element. In a particular embodiment, the holographic optical element may incorporate an interference pattern and/or a sacred symbol or pattern.
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