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I was playing with the VC8/2005 Sample in the threshold view and seeing what sort of objects the Flex V:100 was picking up.

I'm wondering if it's possible to use infrared LED's as markers with the Camera illumination LED's turned all the way down (or off?). Since the camera basically picks up infrared... does this work?

Yes, it is possible. Some of our customers have been experimenting with making their own "active marker" LED setups.

The following thread has some discussion on the topic.
http://forum.naturalpoint.com/forum/ubb ... 826&page=1

We carry a wide angle IR LED in our store that is ideal for use with the IR filters installed in the OptiTrack cameras.
http://www.naturalpoint.com/optitrack/s ... cking.html

I have just received the IR LED's from your store. For the Flex V:100 to pick up the LED, do I need to change any camera options for filtering or should it pick it up by default?

Also, what is the optimal current to run the LED at for fairly good luminosity?

Thanks.

The default camera settings should work, you could consider turning off the IR LEDs in the camera. If needed you could also set the camera to expose to a longer duration (higher value) in order to let in more light.

For the LEDs, you might review the data sheet and then do some experimenting to see what works best for you.
http://www.naturalpoint.com/optitrack/p ... IR-LED.pdf

hi, zann
over the last couple of weeks we have made some successful tests with IR LEDs. With the partical knowledge of this tests we've build up an active suit with LEDs instead of reflective markers. Actual i'm developing ver. 3 of the active-suit where the cabeling is optimized and integrated inside the standard suit.
Overall i can say that the capture quality is top and the reflections of the IRring of the cameras on the ground and other surfaces in the capture room are completly gone cause you can switch off the IR LEDs of the flex:v100
I use IR LEDs in a plastic package, sanded with fine sandpaper to achieve an wider emitting angle.

Good luck with your experiments.

Sven