Choosing a, Camera, Benefits of CCD Technology

Choosing a

Camera

The camera is the ‘eye’ of a CCTV system and at its core lies CCD (charge coupled device) technology.

The CCD is comprised of about 500,000 light sensitive cells called picture elements (pixels) which convert the light falling onto its surface into an electrical signal. The performance of the camera, and ultimately the surveillance system, is more dependent upon the quality of the CCD than any of the other camera components. Currently, the popular formats are:

■ Half-inch	High performance for high sensitivity and low noise

■ Third-inch	Most popular and ideal for a wide range of applications

■ Quarter-inch	A more recent development

Benefits of CCD Technology

■ Long Life	Produced with a design life of up to 10 years

■ Shock Resistant	Much more rugged than older tube technology

■ Size and Weight	Have enabled the miniaturisation of cameras

■ Spectral Response	Responsive in the near infra red area

Pixels (Picture Elements)

■ Total Pixels	This is the total number of pixels on the CCD faceplate.
	They are not all usable

■ Active Pixels	This is the real figure giving the number of pixels
	that are actually in use

For more information contact the Sony Business Information Centre: 01932 816340