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Read the patent or watch the video https://www.youtube.com/watch?v=YeNXRD8eziA&t=0s

In simple terms, the laser transmitter, the laser receiver and the beam that is used introduces a feedback mechanism that the transmitter can employ to immediately detect an unsafe condition and cut the high power (infra red) laser transmission. The response is so fast that the risks to damaging eyes, etc are acceptably low.

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I'm still trying to figure out how that would work with e.g. a piece of glass sitting at an angle other than parallel to the wavefront. That would pass most of the light while reflecting a collimated beam that is much more powerful than allowed for direct laser emission.

Consider the situation where a flat piece of lime glass is in the way at an angle that reflects 1% of the light and passes the rest. With a 3W beam, that would reflect 30mW of laser light which as a direct emitter would be class 3B.

I'm more confident now that it's probably very dangerous and may not get the FDA approval. If they do it will be trickle charging. https://www.youtube.com/watch?v=2bXjn3wwM8o

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