3 ms·
You absolutely can, there are existing products that do exactly this. See the link in my post.
by colanderman 10y ago
You absolutely can, there are existing products that do exactly this. See the link in my post.
- jessriedel 10y agoThanks for emphasizing this, and I agree I need to qualify my statement. I haven't completely understood the restrictions yet, but the effectiveness of this device has to be conditional on the fact that the IR laser is a laser, or otherwise is in some low-entropy coherent state. Otherwise, it could be used to transform part of a uniform IR bath into high-frequency photons, passively generating a temperature gradient from nothing. The incoherent case is the relevant situation when you're talking about passive glasses for viewing a scene in ambient IR light. Here's one place where this is mentioned: http://physics.stackexchange.com/questions/98790/what-low-level-process-drives-a-frequency-doubling-crystal http://physics.stackexchange.com/questions/98790/what-low-le... Still looking for an authoritative treatment...