New camera shoots at 5 trillion frames per second

If the laser doesn’t pulse photons, what does it pulse?

From the article:

“the method involves exposing what you are filming (for example a chemical reaction) to light in the form of laser flashes”

I get that they are using a novel technique to sort out the different ‘frames’ from the one picture. I’m guessing it’s a very highly specialised version of separating red, green and blue components in a color picture, where every component was recorded with a minuscule time delay. And, of course, with many more components…

And therefore they must give the components some form of ‘signature’ to be able to extract them. And yes, this could possibly be done by some sort of laser pulse code.

But that would still be ‘shining photons on the subject and recording the reflection’.

And I’m wondering how they managed to reflect photons of a collection of photons…