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Facet | 凹槽

A facet is a small face on a PIR lens. The facets concentrate the infrared radiation on to the pyro-sensor allowing for longer distances and better coverage.

Facet是PIR镜头上的小凹槽。这些凹槽聚集红外辐射到热释电传感器，提供更远距离和更佳覆盖。


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