Generates infrared (IR) light beams in specific patterns in order to transmit information and commands from one device to another. he most common use of an IR emitter is in a remote control. The clear plastic window at the front of most remote controls contains the IR emitter. This device sends out or emits the light beams (which are invisible to the human eye), and they are picked up and read by the IR receivers in the devices the remotes control. If you look on your television or other remote controlled device (if the remote uses IR), you will find in some place a small plastic or glass “window” into which the IR signals from the remote travel. hen IR signals reach a receiving component, they are deciphered and the television or whatever component is being controlled performs the function you selected on the remote control. here are also IR emitters that attach to the glass or plastic windows on audio/video components and connect to a central control center allowing one remote control (usually a radio frequency remote) to control many IR devices. In such a situation, the remote control sends a radio frequency signal to the central control box, which translates the signals into IR signals and sends them to the components using the IR emitters attached to the components. The advantage of a system such as this is that a radio frequency (RF) remote control does not need to have an unobstructed line of site with the components it controls (in fact, a RF remote can control components through walls and from several hundred feet away).