It wavelength

[cmccarter]

Anyone know the wavelength of the Ir used by most common wifi cameras

 

[badmannen]

prob around 850nm - ish

I bought one of these : http://it.aliexpress.com/item/Free-.../32247081081.html?spm=2114.010208.8.18.kM9yh5

that I recieved a while ago but I didnt have the time to try it yet.

both the normal ir and the exir from my cameras cooperate good with each others camera sensors (hikvision cameras) . so I would guess its pretty much the same for all. sorry do not have a better answer at the moment =)

 

[nayr]

850nm should be visible to any camera with either a mechanical IR cut or no IR filter.

 

[badmannen]

most cameras got a little glow like this (850) as you can see on this page as well. I guess if you buy hightech-ninja-camo-edition cameras your would like to go for higher values =) https://www.larsonelectronics.com/a...elengths-used-in-night-vision-technology.aspx

 

[pozzello]

Anyone know the wavelength of the Ir used by most common wifi cameras

the wavelength of the IR put out (for night-time visibility) has nothing to do with whether the camera has wi-fi or not.
the wi-fi wavelengths 2.4 or 5ghz are nowhere near the visible/IR spectrum.

that said, the IR put out by cams supporting it is not a single wavelength,
but I can say the sensitivity drops off significantly between 850nm and 940nm,
which is why you need 2-3x more IR power when using LED's centered around 940nm (not-visible) than
centered at 850nm (still see red glow from the trail-off below 850nm)...

human vision is up to ~800nm, but LED's centered ~850nm still put out some light we can see
(it's a bell-curve centered around 850nm, even with LED's, so there's some down below 800nm and some above 900nm,
unless you're talking about lasers...)

 

[cmccarter]

the wavelength of the IR put out (for night-time visibility) has nothing to do with whether the camera has wi-fi or not.
the wi-fi wavelengths 2.4 or 5ghz are nowhere near the visible/IR spectrum.

that said, the IR put out by cams supporting it is not a single wavelength,
but I can say the sensitivity drops off significantly between 850nm and 940nm,
which is why you need 2-3x more IR power when using LED's centered around 940nm (not-visible) than
centered at 850nm (still see red glow from the trail-off below 850nm)...

human vision is up to ~800nm, but LED's centered ~850nm still put out some light we can see
(it's a bell-curve centered around 850nm, even with LED's, so there's some down below 800nm and some above 900nm,
unless you're talking about lasers...)

I was hoping it was around 850nm. got one camera that just can't seem to output enough IR to see well. I will try an 850nm illuminator and see if that helps

tnx to all