Im writing an app that will generate graphics for a dance performance. The graphics reacts to how the dancers move. I need to use a near-IR camera, since I dont want the computer to see and be confused by the projected graphics.
So far, Ive been prototyping using a Kinect, but I will need to move so something better due to (among other things) the limited range of the Kinect.
Im looking at the FireFly MV camera from Point Grey. It is sensitive to near-infrared light and has a FireWire interface (= low latency, I hope). However, Im wondering if anyone knows if _any_ lens will do for this application, or if there are some lenses that will not let near-IR light through? Also, does anyone know where one can get filters for C/CS-mount lenses that will block out visible light, but let near-IR light though? (Since I dont want the camera to see the (visible-light) images I project onto the stage, I have to filter them out somehow.) I know there are such filters for still photography, but those filters have the wrong diameter (they are much larger).
Has anyone else here done something similar? What equipment did you use?