Infrared CCTV cameras are becoming one of the most popular types of security/surveillance cameras for residences and commercial applications alike.  Before purchasing an infrared CCTV camera it’s important that you are familiar with some of the terminology and functions associated with this specialized aspect of a CCTV security system.

Most Closed Circuit Television or CCTV cameras today are digital cameras.  Basically, they take pictures or video much the same way as a personal digital camera or camcorder.  These cameras operate by allowing light to penetrate through an iris or variable opening, a lens, and then strike a Charged Coupled Device or CCD or a Complementary Metal Oxide Semiconductor or CMOS.