I want to create a sensor grid that the user can interact with. In talking with people who are knowledgeable on these type of matters two suggestions have stood out: narrow beam infrared LEDs and lasers.
Apparently LEDs are much cheaper and have a smaller footprint (more easily concealed) but they have a wide beam.
The surface are is 50" x 30" and am thinking of having the sensor spaced 6" apart. Is there way to narrow the beam so that it doesn’t strike the neighboring sensors?
For example, would recessing the receiver be effective in shielding it from spillage from the neighboring emitters? Or would it be better to just go with a laser?
In researching LEDs the sites don’t say what the emitting angle is so much as what the receiver is capable of so I’m a bit in the dark on what to buy.
Thanks for any help you can offer.