Ko te karāhe arotahi NIR he karāhe e whakamahia ana mō te mātakitaki i te mārama tata-whero.
1. Ko te arotahi arotahi NIR (Near - Infrared) he wāhanga whatu e whakamahia ana mō te arotahi i te mārama ki te awhi tata-infrared. He mahi nui tāna i roto i te pūnaha whatu tata-infrared. He rite ki te arotahi kāmera, ka taea e ia te kohikohi me te whakakotahi i te mārama tata-infrared e tukuna ana, e whakaatahia ana rānei e tētahi mea, kia mārama ake ai te hopu a te pūoko i ngā mōhiohio e haria ana e ēnei hihi mārama.
2. Ko te whānuitanga o ngā roangaru o te mārama tata-whero-pōkākā kei waenganui i te 780 nanometer me te 2500 nanometer. Mā te hoahoa whatu motuhake me te kōwhiringa rauemi, ka taea e te arotahi arotahi NIR te whakaiti i te he o te tae me ētahi atu he, kia pai ai te whakaahua kounga teitei i roto i te roopu tata-whero-pōkākā. Hei tauira, i roto i ētahi āhuatanga tono ahumahi e hiahiatia ana te kite kore-pā o ngā mea, ka taea e te arotahi arotahi NIR te āwhina ki te tiki tika i ngā taipitopito mata, i ngā mōhiohio hanganga ā-roto rānei o te mea.
E 20 tau te roangaru e arotahi ana ki te whakarato i ngā hua whatu tino tika.