It's true that LEDs can help illuminate your life in all kinds of ways. You can use them to light your home, your garden, your pool; they're used in cars, on planes, streetlamps and in almost every civic application you can think of. But LEDs can also emit light waves that are invisible to the human eye: infrared waves. Infrared (IR) LEDs are most often the types of lights used in remote control devices and in security systems across the globe, including covert devices used by the US Military.
Infraqizil LEDlar odatda xavfsizlik kameralarida ishlatiladi, bu kameralarga kunduzi ham, kechasi ham tasvirlarni olish imkonini beradi. Infraqizil yorug'lik to'lqinlari inson ko'ziga ko'rinmaydi, lekin issiqlik chiqaradigan har qanday narsa, masalan, inson tanasi yoki-issiq avtomobil dvigateli tomonidan chiqariladi. Infraqizil yorug'likni oddiygina aniqlaydigan tungi ko'rish ko'zoynaklaridan farqli o'laroq, infraqizil kameralar mavjud bo'lgan muhit yorug'ligiga qarab infraqizil nurni aniqlaydi va chiqaradi. Infraqizil kameralar odatda qayd etilgan hududdagi yorug'lik darajasini kuzata oladigan sensor tizimiga ega. Tabiiy yorug'lik darajasi pasayganda, sensor tasvirni yoritish uchun qancha infraqizil nur kerakligini hisoblab chiqadi va shunga mos ravishda infraqizil LEDlar yoqiladi. IQ LED chiziqlarining kuchi to'liq qorong'i tushguncha asta-sekin o'sib boradi va bu vaqtda tasvir 100 foiz IQ nurida ko'riladi. IR texnologiyasining yagona kamchiligi shundaki, IRda olingan tasvirlarni faqat qora va oq rangda ko'rish mumkin.
Infrared LEDs are also used in most remote-control devices; an infrared beam carrying instructions in binary code is sent from the remote control to the device (your television or your child's Tonka truck), which receives these commands and performs the action given.
