IR CUT Cameras

[Radman171 0]

Another question from a noob:

 

I checked but didn't find anything here on the forums about these cams, so here goes:

 

I bought a couple of new cameras as replacements for my system, and they were advertised as "IR-CUT" cameras. Research shows that these cams use an IR filter for daylight hours, which makes the daytime video MUCH better -- great color, etc. (My older color cameras have a washed-out look during the day).

 

My question is, what is it that makes these cameras perform so well? The reason I'm asking is because I've also seen some replacement board camera lenses advertised as "IR-CUT lenses", as if there's some kind of coating on the lenses that does the IR filtering.

 

Is it a circuit in the camera that does the filtering, or is it something about the lens that filters the IR?

[adamxp12 0]

IR Cut usually means that theres a filter that blocks infrared light in the day then at night it is mechanically moved out of the way of the sensor allowing use of infrared lighting.

 

The reason they have the filter is because the sun emits some infrared light which makes the image washed out and colours usually turn a weird shade of pink/gray so they have a filter to block this light.

[catseyenu 0]

A little OT...

Would it stand to reason that some of the posts I've read about pink or purple tinting could be caused from either the lack of of poor IR filter?

[adamxp12 0]

A little OT...

Would it stand to reason that some of the posts I've read about pink or purple tinting could be caused from either the lack of of poor IR filter?

 

Yes you are correct the image would usually be tinted pink because either the camera does not have a ir cut filter (usually cheap cameras) or it is stuck as some people have reported on the forums.

[catseyenu 0]

Thanks.

[joseph.chen0312 0]

I guess that mean True ICR not IR-Pass/Cut filter.