IR Illumination

[1qwerasdf 0]

Is IR light strictly directional, or does it bleed all around a room like a flashlight would?

[scorpion 0]

It would depend on the LED.

 

IR cameras do work better indoors then they do outdoors, and they work better as to what you describe about bouncing off of the walls, and the ceilings to better illuminate. The video will look better because of side lighting, and the IR illumination is softer.

 

Kind of like the professional photographers who use those "umbrellas" to bounce the light, and break it up some to soften it.

 

Photographers will use down lighting, and sidelighting to take a picture.

 

The more you can do that with IR illumination the better your video will look.

 

There are long throw IR LEDs. This can be seen on the monitor as there is a very large circle on a far distant wall. The stronger the throw the brighter the spot. If an object is to close it will be washed out by the overpowering illumination.

 

There are wide throw IR LEDs. This is designed for wide angle lens cameras like bullets.

[rory 0]

As mentioned it depends on the IR, but typically once it has an object to reflect off then you can get alot more coverage, perhaps the bleeding you are talking about? Many IRs will be way too powerful to place inside a small room also.

[1qwerasdf 0]

I attached a drawing of the situation. The IR is shining on the ceiling. Will it bounce to the target area?

[1qwerasdf 0]

The ECL-IR30 would be perfect if it didn't give off a red glow. Is it the diodes themselves that give off the glow, or is it a little red light that might be covered with a piece of cardboard?

 

What do you think of Clover?

[CollinR 0]

I attached a drawing of the situation. The IR is shining on the ceiling. Will it bounce to the target area?

 

Should work fine.

 

The ECL-IR30 would be perfect if it didn't give off a red glow. Is it the diodes themselves that give off the glow, or is it a little red light that might be covered with a piece of cardboard?

 

What do you think of Clover?

 

1. It's the IR LEDs themselves, if it's pointed up as in your diagram you will not be able to see them.

 

2. Clover sucks, bad.

 

 

 

 

 

BTW Honeywell has a ceiling mounted hockey puck style 360* illuminator or indoor use, I haven't played with one yet but it looks cool.

[1qwerasdf 0]

Some good sites please to get ir illuminators and cameras.

 

Is there something like the ECL-IR30 without the glow?

[1qwerasdf 0]

What about the KTL ILL1000?

[1qwerasdf 0]

What about the Lorex VQ-2121?

[rory 0]

To be invisible to the human eye it needs to be approx 930nm+ .. most OEM IRs dont have that option, Extreme CCTV does but is not cheap. Basically that is a darker filter meaning there will be less light available for the camera also. With all IR sensitive cameras the IR spectral response of the camera will determine what kind of usable image you get in pitch dark with a specific IR illumination, and not all cameras are made alike - some will not even see 930nm for example.

 

So that said if you want the invisible IR light then you also need a camera that can see it.