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How Do Night Vision Security Cameras Work?

Apr 14, 2008
To make their places secure, every business be it small or large, depends on one or the other video surveillance system available in the market today. Like CCTV, video surveillance system enables you to observe an area by using one or more cameras. Although the cameras used in the video surveillance system do wonders in creating fine images in the presence of bright lights, they would fail to deliver a quality picture when the source of light is dim or there is no light at all. Thus, in a position where one needs to monitor an event at night, things become worse. But never loose your heart, because infrared illuminators are there at your service to tackle such situations.

Infrared Illuminator is the source of light, which works in the infrared frequency. The light source acts as an amplifier for the images, which results in making the objects visible even in dark. Because the light spectrum above and below the wavelength of VIBGYOR do not fall under the visible range of frequency, the light produced by the infrared illuminator is invisible to the human naked eye. The infrared illuminators available in the market are basically made to send lights of various wavelengths, such as 730nm, 830nm, and 950nm, which are above the visible length, i.e., 700nm. On the basis of the actual requirement, illuminators with different wavelengths of light are used in various cameras, such as night-vision cameras and infrared security camera. The only difference between these two cameras is the wavelength they use.

The infrared illuminator makes it possible for your cameras to create good video images in night just the way it would do in the daytime. Usually black and white cameras with infrared illuminators installed with them are used for such purposes because of their high sensitivity to infrared lights.

Infrared illuminators produce infrared light with the help of Light Emitting Diode (LED). As the amount of light emitted by an LED is very small, a large reservoir of LEDs is used, which makes it last longer. In addition, the use of increased number of LEDs enhances the efficiency of the infrared illuminator.

You can make the working of a night vision surveillance camera system with infrared illuminator more beneficial simply by installing right sensors. These sensors will automatically turn the infrared illuminator on only when the camera starts operating or when it detects any movement. This way, you can have a check on your monetary expenses by saving a lot of energy and length of recording tape, which would otherwise have been a wastage by recording unnecessary stuff. In addition, this feature will increase the life duration of the devices. Above all, you are able to save a lot of your valuable time.

Making the Night vision products more powerful, guarding a military base, or studying wild life habits during night-time, whatever may be your purpose, the security cameras with infrared illuminators are there to make it possible for you to see in complete darkness and without making anybody aware of this.
About the Author
Steve Strong's is an employee with Sun Security which supplies Night Vision Security Cameras , Video Surveillance Systems and DVR Cards Visit us at: http://www.sunsecurity.com
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