I don't actually know what that specifically means in this case.

If I were to guess, I'd assume that "de-coupling" means "splitting the spectrum into RGB." RGB, because it's easy to reproduce for human viewing, but you could do this with other spectrums as well.

I imagine "in-coupling" refers to how they get the light to a sensor.

I used to worked for a company that would use lasers to "build" mirrors inside of blocks of glass. They could tune those mirrors to reflect just red, or just blue, or green, or any combo.

I can imagine using this sort of tech to build panels of glass that can route "de-coupled" RGB to travel spectrum specific sensors.

Or, it might be possible that they're just capturing the full spectrum of light, but using microscopic etchings or surface treatments to bounce light down a layer of glass, somehow bouncing "pixels" of light down the pane of glass in a way that isn't lost while capturing other "pixels".

I say "pixels", but what I mean is "a portion of the glass." If you think of the glass as the polished ends of fiber optic strands, all bundled together, each of them routed to a specific sensor pixel - that's sort of what I mean. If you can etch your prisms/combs/gates fine enough, you can have higher "pixel" density from your glass pane.

Then again, they're the lens experts and could be doing something else entirely. I'm really just guessing.