An infrared security camera is also known as thermographic security camera system. A thermographic security camera can often called FLIR (forward looking infrared). Thermographic security camera is another form of infrared security camera but with less requirements or specifications. < Thermographic security camera is a device that forms body or image using infrared radiations and supplies to the CCTV monitor. Thermographic security camera is similar to the visible light security camera or covert security camera or any other security camera that figures an image using visible light or natural light.

Difference between visible light camera and thermographic/infrared security camera system

The difference between visible light security camera and thermographic or infrared security camera is the light. Visible light security camera uses visible or natural light rather infrared security camera or thermographic security camera uses infrared radiation light that normal eye can’t see.

Normally, the range of visible light security camera is 450-750 nanometers. Thermographic security camera or Infrared security cameras can operate in wavelengths i.e. 14,000 nanometer (µm).

Thermographic security cameras are more effective than visible light camera due to its range. Visible light security camera can only have some specified range. But thermographic security cameras can have the variety of ranges that makes infrared security camera or thermographic security camera system is surpassing from others.

The resolution of thermographic security cameras is considerably lower than of optical cameras. The thermographic security camera can be only 160x120 or 320x240 pixels. Thermographic cameras are much more expensive than visible light security camera.

Infrared security camera system ‘theory of operation’

The theory of operation of infrared security camera/thermographic security camera is quite natural and intellectual with science and technology. As far as nature and scientists are concerned all objects releases a certain amount of black body radiations as a function of their temperature. Infrared security camera works under the black body radiations omitting from human bodies, still objects and motional objects.

As far as science is concerned the higher an object’s temperature is, the more infrared radiation as black body radiation it releases. An infrared security camera system can detect this radiation in a way similar to an ordinary camera does visible light.

The infrared security camera completely works in total darkness because ambient light level doesn’t substance. This makes the infrared security camera/thermographic security camera system more reliable for home security and families. You can use infrared security cameras in dark basements, underground fields, and also can use indoor.

The theory of operation of infrared security camera and thermographic security camera further divided into cooled infrared security camera detectors and uncooled infrared security camera detectors/thermographic security camera system.

Images formed by infrared security cameras can be monochromatic. The infrared security cameras are designed with only a single type of sensor reacting to single wavelength range of infrared radiation rather color security cameras can require more complex construction to differentiate the wavelength and colors.

The advantages of infrared security camera/thermographic security camera are greater than visible light security camera system. You can use infrared security camera in localize the person who struck in fire flames or not visible because of fire. You can see the person behind the smoke by using infrared security camera. Infrared security camera can be imaging power line maintenance technicians locate overheating joints and parts in the pipe line.

Cooled infrared security camera detector

Cooled infrared security camera detectors are generally enclosed in a vacuum- preserved box and cryogenically cooled. Cooled infrared security camera detectors are greatly increases their sensitivity as the temperature of cooled infrared security camera detectors are much lower than that of the objects to be monitored to detect the infrared radiations. The cooling temperatures of an infrared security camera detector are 4K to 110 K and the most common 80K respectively. Cooling is very necessary for the infrared security camera detectors. The cooling may increase the sensitivity of the infrared security camera detectors. Without cooling the infrared security camera detector is blind and wouldn’t able to figure any image on the CCTV monitor system. The cooled infrared security camera detectors are very expensive rather visible light cameras. Cooled infrared security camera needs several minutes to activate. Without cooling the cooled infrared security camera does not work properly and may be it flooded by its own radiation. The components of the cooled infrared security camera detectors are bulky and expensive. The cooled infrared security camera detector provides a high resolution quality images rather uncooled infrared security camera detectors.

The supplies used for cooled infrared security camera detectors includes liquid-helium cooled bolometer, photon-counting superconducting tunnel junction arrays and a broad range of cheaper narrow gap semiconductor.

Uncooled infrared security camera detector

Uncooled infrared security camera detector use feelers or sensors that activate at room temperature. The latest uncooled infrared security camera detectors work with change of resistance and voltage when infrared security camera heated by infrared radiations. The resistance and voltage of the uncooled infrared security camera adjustments are to be measured and compared to the values at the in service (operating) temperature of the sensor. Uncooled infrared security camera detectors can be calmed to an operating temperature to decrease image noise. The good incentive of the uncooled infrared security camera that they are not cooled in a low temperature conditions and they don’t required even the bulky cooling equipments. Uncooled infrared security cameras are less expensive and easily can available in market. The image quality of the uncooled infrared security camera is very low rather cooled infrared security camera. Uncooled infrared security camera detectors are based on pyroelectric materials and micro-bolometer technology.

Infrared security camera comes in wireless technology, digital and analogue camera technology respectively. It is better to install an infrared security camera system in your home to make sure the best home security system.