We all know that technology is improving in all the fields. Whether it is the equipment, the techniques or the final product, we can see the effect of this improvement in all the phases of living. People are now looking forward to ensure that this can be made use of in their day to day lives as well. As we all know, security has become a great matter of concern in today’s world. We need to protect people and property from criminals.
Here too, we can see that the use of advanced technology like the surveillance systems and the CCTV cameras is on a rise. People are now installing these systems around their homes, offices and many other public places too. But, do they capture everything that you wish to catch? Are these cameras useful even when it is pitch dark outside? No, even the most powerful CCTV cameras need at least some amount of light that will help them see through the dark and capture clear images. Therefore, scientists came forth with the concept of Infrared Light or IR light. This IR light is generated using an IR Illuminator that can be attached to the camera.
How does an IR Illuminator work?
Before we move on to this, we must know that the human eye can see the light that is present between a certain range. If the light exceeds the frequency, it is called an ultra violet light. Whereas, if the frequency is lower than the standard range, it is considered to be an Infrared light.
The IR Illuminators thus generate this Infrared light that is actually invisible to the human eye. The light is generated and passed on in the region that lies in the range of the camera. The cameras are made with the capability to catch this light and thus help in capturing clear images. We have thus seen that the IR Illuminator illuminates light that can only be distinguished by the camera, but cannot be seen by the human eye.
Working of the IR Illuminators with CCTV Cameras
As mentioned above, the IR Illuminators can be used well with the CCTV cameras for surveillance systems. But, since all the CCTV cameras are not the same, you need to check whether the camera can be used along with an illuminator.
It is usually observed that the black and white CCTV cameras are more sensitive towards IR light and give sharper and brighter images. But, not all the CCTV cameras that give colored images can get along well with these illuminators. The filters present in these cameras usually cut off the effect of the IR light in order to make sure that they get a clear and a sharper image or a footage. Thus, one needs to be sure of the camera, he will be pairing the IR Illuminator with. There is no use buying a good IR Illuminator when the camera itself won’t support it.
Types of IR Illuminators
There are a number of IR Illuminators that are available in the market. You can select them depending on the application you will be using it for.
- Filtered Incandescent lamps: These are Incandescent lamps that are usually covered with an Infrared filter. The filter is responsible to hold back the visible light, making sure that it is not passed on to the outer world. Heat is a major issue in such lamps as the visible light that is held back generates a lot of heat inside.
- LED type Infrared Lights: These are known to be the convenient and efficient IR illuminators as they are made using arrays of LEDs that emit infrared light.
- Laser type: These IR Illuminators make use of laser diodes to produce Infrared energy. These are the most efficient IR Illuminators.
We have thus seen the general working of an IR Illuminator. But, again, it still depends on the material and the equipments being used. You can take a look at the above mentioned types of IR illuminators and compare the material and the working to select the best one that suits your purpose.