What is an infrared LED?

Infrared light can also be used to transfer data between electronic devices. Mobile phones, personal digital assistants (PDAs), and some laptops may have an infrared LED and receiver designed for short-range data transfer. Some wireless keyboards and computer mice also use an infrared LED and receiver to replace a cable.

Although invisible to human eyes, many types of cameras and other sensors can see infrared light. This makes infrared LED technology well-suited to applications like security systems and night vision goggles. Many security cameras and camcorders use infrared LEDs to provide a night-vision mode. Hunters may use similar equipment to spot game at night, and some companies sell flashlights with an infrared LED to provide extra illumination for night-vision cameras or devices.

Infrared LEDs can be used for a variety of other purposes. The U.S. Food and Drug Administration has approved several products with infrared LEDs for use in medical or cosmetic procedures. Robots may use an infrared LED to detect objects, and some utility meters even have an infrared LED to transmit data to a tool for easy meter reading