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Ccd charge coupled device
| CCTV glossary (глоссарий терминов по видеонаблюдению) |
Charge coupled device, ccd, is one of the two main types of image sensors used in security cameras. when a video is recorded, the ccd is struck by light coming through the camera`s lens. each of the thousands or millions of tiny pixels that make up the ccd converts this light into electrons. the number of electrons, usually described as the pixel`s accumulated charge, is measured, and then converted to a digital value. this last step occurs outside the ccd, in a camera component called an analog-to-digital converter.
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Ip waterproof rating, английский
Ip waterproof ratings are a bsi standard measurement for how waterproof something is. many security cameras or camera housings are designed for outdoor use need to be waterproof. the ip rating number has two digits, and optional letters after them. e.g ip66 and ip68. the first number defines the protection against ingress of foreign objects. 0 is the lowest rating and means non-protected. 6 is the highest rating and means dust tight and protects against access with a wire. the second number defines the level of protection against ingress of water. 0 is the lowest rating means non-protected. 8 is the higest rating and means protects against continuous immersion in water.
Bnc connector, английский
- Bnc is a connector for coaxial cable that is most commonly used for cctv installations.
- Разъем bnc
- A connector for coaxial cables that locks when one connector is inserted into another and rotated 90 degrees.
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