I'm trying to use an IR LED for a project but I want to direct the IR LED so that it's a straight line of light. I've been trying to find a lens to place in fron of the LED but I don't know if that will work. The project has an transmitter and a receiver where the trans and receive are at least 32 inches away from eachother. The transmitter needs to emitt a straight line of IR and the receiver needs to receive it (obviously) Please help! Thanks.