New all-optical approach to revolutionise night vision technology

> and that could one day be placed on everyday eyewear, allowing the user to view the infrared and visible light spectrum at the same time.

Hmmm.. this could get interesting. And not necessarily in a good way.

It reminds me of the issue with the old night-vision Sony camcorders and cameras that were used to get pictures of people naked.

Polyester and a few other fabrics are transparent on IR.

How would that be bad?

I wonder if this could be used to boost solar panel efficiency?

See also: Enhanced Infrared Vision by Nonlinear Up-Conversion in Nonlocal Metasurfaces