Maybe silly question..
lets say we have an ir emitter and ir receiver in the same room, and we point the ir emitter 180 deg away from the receiver, then we push the button and rely on the fact that the ir light bounces from the walls of the room and hits the receiver...well ok lets just say we point it anywhere in the room. So my question is, would different beam angles have benefits over others in this scenario ? Would the reflected light from a narrow beam bouncing off of several walls be more efficient than a wider beam angle given that the radiated power exiting the led is equal for each ir led no matter what angle it has ?
If i think this through..if we consider the walls as mirrors and a narrow beam angle like a laser, then the multireflected light would only hit the ir receiver if it hits it by "accident", because we got lucky and the light was refleceted just about at the right spot. But if you think more about it...the traveling beam also glows and this glow gets reflected everywhere...so the indirect glow will hit the receiver even without the actual focused laser hitting it directly.
Now if we consider a wide beam..the wider the beam the easier it will hit the receiver from direct reflections, since it is so wide no lucky reflections are required.
Still i dont know..