Is it possible to light up the license plate?

Question

Do it yourself

I want to say right away that I am creating the question without malicious intent, but simply for the sake of interest. In addition, I do not have a driver's license, and so far, it is not expected on the horizon.
As far as I know, infrared radiation is visible in the viewfinder, it’s trite, if you click the TV remote control into the camera lens, the glow will be visible, but the human eye, on the contrary, does not see it.
So, is it possible to build infrared LEDs into the backlight of a license plate, and more powerful, in order to “illuminate” it for road cameras, thereby making it difficult to identify it?
Or, because of the reflector in the white paint, will it only enhance the contrast of the black?
I just came up with this crazy idea, and I'm not very friendly with physics, so I'm asking here.

Answer 1

Answer 2

To those who remember the "presumption of innocence":
It only applies to criminal offences. Here the variant of an administrative offense is being considered, so you will have to prove that you are not a donkey yourself.

Answer 3

Lighting is not required. The camera receives reflected light, in this case, the IR range, so you can simply cover the license plate with some transparent material with an IR filter that does not let them through - the license plate is visible only under normal light.
If they stop and ask why the number is closed and why it is not visible, then say " peeping is not good, I try to keep the number safe, but I know what the cover is made of!"

Answer 4

In fact, IR filters are usually put on cameras - otherwise they would be of very little use during the day.
Well, deliberate actions aimed at worsening the readability of license plates are at least a civilian.

Answer 5

There are commercially available sprays (offhand) from different manufacturers.
The license plate is legible in normal lighting, but the radar only sees white light.

Answer 6

In some series of myth busters, they tested all sorts of things like that, there was no effect.

Answer 7

It seems to me that the IR signal from the cameras is modulated, so simply shining LEDs, most likely, will not be of any use. Now, if the spectrum from the cameras was removed and reproduced ...

Answer 8

I think that it is necessary not to constantly shine with an IR (in this case, hundreds of watts or even kilowatts may be needed for illumination), but with a flash lamp. The main thing is to figure out how to synchronize with the moment of shooting. Most likely, the survey is made after a fixed time interval after the detection of a violation by the radar, which is logical. Therefore, you can put the receiver on 24 GHz and synchronize from it. But all this is quite complicated and not worth doing research ...