Bakanin infrared yana nufin kewayon radiation electromagnetic tare da tsawon tsayi fiye da na hasken da ake iya gani amma ya fi guntu na igiyoyin rediyo. Wannan bakan yana yawanci zuwa yankuna uku: kusa-infrared (NIR), tsakiyar infrared (MIR), da far-infrared (FIR). Infrared radiation ana samar da shi ta hanyar motsin zafi na atoms da kwayoyin halitta kuma ana amfani da su a aikace-aikace daban-daban kamar nesa, spectroscopy, da thermal imaging.