Infrared reception refers to using an infrared receiving head to receive infrared rays emitted by an infrared transmitting tube, with a wavelength of 750-1150NM.There are two important components inside the infrared receiver, namely IC and PD.IC is the processing element of the receiving head. It is mainly composed of silicon crystal and circuit. It is a highly integrated device. Its main functions include filtering, shaping, decoding, amplification and other functions.PD is a photosensitive diode whose main function is to receive light signals.Infrared receiving products have different shapes, generally including glue-filled nose bridge models, hemispheric pressure models, and ones with iron shells.Widely used in TVs, toys, DVDs, VCDs, car audios, fans, air conditioners, electricity meters and other fields that require infrared remote control.