Sensor Camera
People have many great attributes, but seeing in the dark is not one of them. Human vision is to be a small part of the electromagnetic spectrum is limited than visible light. It is possible for people to see through this area through the use of devices that we do not collect visible sources of electromagnetic Radiation, such as infrared light can be described.
Many CCTV cameras now have the ability to project infrared light through a series of LED lighting. When this ability with CCD sensors capable of recording the infrared light is combined, you get what referred as Night Vision.
CCTV cameras with night vision capabilities allow you to see in complete darkness. Many night-vision cameras to produce detailed video-capable, regardless of light conditions. If change is required, night vision surveillance cameras automatically to infrared mode, without the intervention of man.
There are four important things to think about you because when dealing with night vision surveillance cameras. Distance, resolution, light pollution and sensors.
Many cameras tout their ability to infrared light project at great distances. Before spending resources to boast a camera that such deeds, remember that even if a camera can illuminate an object that far away is, chances are you are not be able to do what the object is (unless) you take a camera with a zoom function. It is better for your money at a higher resolution To spend a camera with a lower infrared function.
A vehicle must be within 50 feet a night vision camera to correctly identify the manufacturer and model (forgot about the color with an infrared surveillance camera, it is the car) always a shade of green color. A person must, within 20 feet of the surveillance camera be to make a correct ID.
Most security cameras with infrared lights have a range of at least 25 meters - why the focus should be on the increase of image details (or resolution) be to have a better chance of identifying the object. Remember that the resolution of the camera must be coordinated by a recording device that has the capability of recording. If your camera has 480 lines resolution, and your digital video recorder can record only 320 lines of resolution, You will lose the advantage of higher resolution.
The other issue is light pollution. Many outdoor area is lit at night. Sometimes fairly strong light sources. Be very careful not to place affecting your night vision surveillance camera in the vicinity of such sources, as with the sensors and could lead to undesirable To produce artifacts in the recorded video.
If you plan to use your night vision surveillance camera in an unlit area, remember to that the infrared lights produce a faint reddish glow, which can be easily detected at short distances. You may not be the best solution for covert Monitoring measures.
Night vision is a necessary feature for any outdoor CCTV applications. When selecting the camera, make sure that it is in use Infrared Illuminators and features a CCD sensor. Cameras equipped with CMOS sensors do not cause as much in the dark, so I would recommend that you steer clear of them for Outdoor applications. Also look for a camera with an IP55 designation, indicating that the camera works well in humid and dusty conditions are used.
About the Author:
Andy J Thompson is a residential CCTV camera specialist. For additional tips and informaiton you can read his blog at http://www.securitycameratutor.com/
Article Source: ArticlesBase.com - Security Cameras that see in the dark
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