only 18 leds? wow , can you tell me please which large was the space you iluminated? how many meters does it have?

A circle of approximately diameter 2 meter.

The 18 LEDs are placed at a distance of approximately 1 to 2 meters.

http://gerard.paresys.free.fr/Installation/index.html

Gerard

thanks!!!

2010/8/30 Gerard Paresys gerard.paresys@ens.fr:

...

I illuminated an installation with 18 IR diodes OPE5685. http://radiospares-fr.rs-online.com/web/4550802.html

For an Unibrain camera ref 2061:  http://www.unibrain.com/Products/VisionImg/Fire_i_BC_remoteCCD.htm with 2.1mm Wide Lens (no IR coating)

Gerard