Reflector Aspheric hybrid - anybody try this?

[Agro]

You can find some experiments like that here:

Aspheric + secondary optics

Using a secondary optics is a rare design decision. It can greatly improve optical performance by redirecting light that would otherwise hit flashlight head, but for some reason few makers do it. I’d like to compile knowledge on available aspheric+precollimator setups. I’d like to also try to quantify the throw loss, but so far I lack data to do that. I welcome any help. So…what secondary optics are there in the wild? TIR lens captures most of the light and puts it in the beam fully focused…

Yes, there are numerous TIR lenses like that as well.