Tip: Don't record laser tattoo removal (2019)
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The iPad camera doesn't show any signs of damage so far, but it was not exposed to the direct beam path of the laser I suppose. I watched it for about a minute or so this way, and recorded a video of the little scanning lens in it with the 240fps feature.
On the other hand, this was a projector, so I'd assume the laser output can't be TOO dangerous, else the projected output would be hazardous to view.
There is a longer video about the device, but the linked video should start at the "good bits"
Think about it — a camera may be expensive, but it can be replaced. An eyeball is much more difficult — and expensive — to replace.
How much attenuation/atrophy does a mirror induce to a laser? (assuming a good quality mirror and not a potato.
(I am surprised "photonic" is not a word)
The typical bathroom mirror is around > 80% reflective, but this damage is from the reflection off of the skin of the patient, not a mirror. Skin is much less reflective than a mirror, and it's still enough to damage the sensor. So, that should give a sense of the kinds of powers involved.