Are there lenses for focusing 940nm IR diodes?

Question

Do it yourself

Good time, comrades!
In the course of developing the solution, I ran into the problem that it was necessary to collect the luminous flux of the IR LED at 0.30 degrees. I didn't find a suitable solution. How do you think it would be possible to focus an IR LED to the required parameters? Or maybe it's not worth wasting time and looking for fundamentally different ways?
Thank you!

Answer 1

ordinary glass lenses to help you. but 0.30 degrees is a system of 3-4 lenses should be.

Answer 2

Isn't the body itself a lens. The concentration of the light flux from the source on a certain surface is measured in a silent camera by an IR receiver.

Answer 3

Hello. If I imagined it correctly, then a lens / prism from an optical mouse should come up:

Answer 4

I don’t know how much it will help, but here is such material - tarefer.ru/works/71/100019/index.html
This is an Abstract: Designing an infrared channel
Very voluminous in terms of scientific information