The Raspberry Pi and Pi2 are economical little ARM machines which can happily run Linux. The popularity of the Raspberry Pi and compatible Pi 2 models means that a great deal of accessories are available. These accessories include the PiNoir Camera and 4D Systems’ touch-sensitive, 3.5-inch display.
The PiNoir camera is so named because it does not have an Infrared Filter (no-IR). Without an IR filter the camera can be used at night, provided you have an infrared light source.