ABSTRACT
Digital cameras contain an imaging sensor, usually either a charge coupled device (CCD) or complementary metal oxide semiconductor (CMOS) type. Both CCD and CMOS imaging sensors are sensitive to wavelengths from around 200nm to 1200nm. According to Advanced Camera Services in the UK, who have converted hundreds of both CCD and CMOS cameras, there does not seem to be any noticeable difference between the two types of sensor when it comes to converting a camera for ultraviolet (UV) or infrared (IR). CCD and CMOS sensors are composed of a grid of light-sensitive cells known as picture elements, or pixels. A filter with dielectric coating, which reflects IR radiation and transmits visible light. The sensors on most modern digital cameras have a hot mirror filter over them to remove the IR and UV radiation and give the 'correct' colour for conventional photography.
