What is an ir emitter?

An IR emitter is a device that emits infrared radiation, which is a type of electromagnetic radiation that has wavelengths longer than those of visible light, but shorter than radio waves. It is commonly used in applications like remote controls, sensing systems, and communication systems. IR emitters are usually made of materials that can efficiently emit or transmit IR radiation, such as gallium arsenide or indium gallium arsenide. The wavelength and intensity of the IR radiation emitted by an IR emitter depend on the material used and the design of the emitter. Common types of IR emitters include LED-based emitters and laser diodes. IR emitters are often used in conjunction with IR receivers, which are capable of detecting the radiation emitted by the emitter.