In a preferred embodiment, the light sources are emitting visible, infrared or near-infrared light.

在优选的实施例中，光源发出可见的红外或近红外光。

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In a preferred embodiment, the light sources are emitting visible, infrared or near-infrared light.

在优选的实施例中，光源发出可见的红外或近红外光。

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