CCTV Surveillance. Video Practices and Technology by Author Unknown PDF

By Author Unknown

ISBN-10: 0750690283

ISBN-13: 9780750690287

A entire reference on CCTV expertise
Gives functional recommendation at the right makes use of of CCTV to top safeguard opposed to crime
Contains greater than a hundred photographs of the main glossy gear available.

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Extra resources for CCTV Surveillance. Video Practices and Technology

Example text

However, the total amount of energy produced by the tungsten lamp over the entire spectrum is comparable to that of the other lamps. Figure 3-8 shows the human eye response and spectral sensitivity of standard CCTV camera sensors. 2 Tungsten-Halogen Lamps The discovery of the tungsten-halogen cycle significantly increased the operating life of the tungsten lamp. Tungsten-halogen lamps, like conventional incandescent lamps, use a tungsten filament in a gas-filled light-transmitting envelope and emit light with a spectral distribution similar to that of a tungsten lamp.

The only improve­ ment to be made, assuming that the camera has good resolu­ tion, is to choose a monitor having resolution equal to or better than the camera or transmission link bandwidth. Chap­ ter 7 gives more detailed characteristics of monochrome and color monitors used in the security industry. 1 Monochrome By far the most popular monitor used in CCTV systems is the monochrome monitor, which comes in sizes ranging from viewfinder size, which has a 1-inch-diagonal CRT, up to a large display monitor, which has a 27-inch-diagonal (or larger) CRT.

Lamps come in two types: tungsten or tungsten-halogen lamps, which have solid filaments, and gaseous or arc lamps, which contain low- or high-pressure gas in an enclosed envelope. Arc lamps can be further classified into HID, low-pressure, and high-pressure short-arc types. HID lamps are used most extensively because of their high efficacy and long life. Low-pressure arc lamps include fluorescent and low-pressure sodium types, which are used 48 CCTV Surveillance in many indoor and outdoor installations.

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CCTV Surveillance. Video Practices and Technology by Author Unknown


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