When it comes to CCTV systems the inevitable requirement will always arise for the cameras to be able to see in the dark. Well this is certainly doable and it really comes down to the choice in camera of which there are 2, Low Light or Night vision. Both technologies have their compensation, and likewise disadvantages. Let’s take a quick look at both.
Low Light
The low light CCTV camera comes in 2 forms, either the traditional body cameras that need to be placed in a housing if going outdoors, or one of the more modern Vandal Strong Domes which can be domestic or open-air with no additional housing. Both work the same way utilizing any ambient light at low light levels without the need for any built in IR (infra red) explanation.
These are usually the preferred choice for low light environments such as Pubs and Clubs, or city and town centers when there is an plenty of ambient street lamps and shop lighting at night. Though they also have a much more useful function when the inquiry comes up of capturing vehicle number plates. As this technology does not use its own IR explanation it will not suffer from IR bounce back, as long as a clear image rather than a insightful white haze in place of the number plate. The one huge drawback though that if the area you are trying to monitor is in complete darkness then you really won’t see much at all.
Night Vision
As the name of the Security camera suggests this technology allow the user to see at night with the use of its own built in Infra Red (IR) explanation. These cameras can see uncommon distances depending on the amount and intensity of the IR bulbs used, this cam be from as small as 5 meters all the way up to 100m + in complete darkness. The IR light that is omitted cannot be detected by the human eye, the only clue you will get is that is looking directly at the camera you will be able to see a very faint red glow but not anything more. When looking at the footage though a monitor you will get quite a uncommon depiction, a well illuminated black & white image showing up surprisingly excellent detail.
If you’re trying to be covert then maybe you will feel the infra red gives away the spot of a camera, arguably though this kind of security camera will be more of a deterrent which surely is the whole point of having a Camera system. The downsides to this tech are only a few, obviously you will struggle to capture number plates due to the chance of IR bounce back, and an image can be over exposed if the camera you are using has a much superior IR range than the distance of the object you are monitoring.
Conclusion
To be honest no one tech is really better than the other, both are very excellent in their own right and one will not dominate the other in the future. Both technologies will continue to be developed to boost upon the generation before. The cctv cameras choice will nearly always be determined by the background in which it is to be situated.
http://www.digitaldirectsecurity.co.uk/qualified-very-low-light-day-night-dome-camera.html and http://www.digitaldirectsecurity.co.uk/cable-managed-vari-focal-night-vision-camera-ir-range-30-40m-.html
Article Source: EzineArticles.com
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