IR illuminators

How does an IR illuminator work?

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.

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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.

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The need for even illumination for Network Cameras

We all have known the importance of installing night vision network cameras to obtain better images and footage during the dark. It is during this time that the cameras are capable to capture things that are not visible to the human eye. Images are better captured with the use of the IR Illuminators installed along with these cameras. These illuminators are mainly used for the Infrared light that they provide so that the cameras can capture a clear image. This light is invisible to the human eye and thus does will not give an idea about a camera being installed in a place.

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The clarity of the image or the video footage obtained highly depends on the kind of IR light emitted by the IR Illuminator. You will rather prefer buying a camera that provides high resolution images. But, higher the resolution of a camera, more evenly distributed the light has to be. These cameras will not be able to capture an image if the IR light from the illuminators is focused in a single direction. The light emitted by this device needs to be focused evenly throughout the range of the camera.

Consider a situation that you are driving a car on a highway. It is pitch dark and you can only see the road and a little more because your headlights are on. Suddenly a car is coming from the opposite direction that also has its headlights on, will cause disturbance in your sight. This is because the light was quite evenly distributed while you were alone, but later as another car appeared, a flash of light coming from a single direction will suddenly prick your iris. This will affect your vision for a while. This is a similar case in cameras as well.

Cameras with a lower resolution give out images that are made of less number of pixels of larger size. Whereas, the high resolution images obtained are the ones that contain high number of pixels, each made up of a smaller size. The larger the pixel, the more it can capture an image. The smaller the pixel, the more amounts of minute details are required. Hence, the quality of lighting may affect these too. Larger pixels may not need even distribution of light, but the smaller ones will need enough of light to be distributed in each of them. Thus, even distribution of the IR Light is required while we expect a network camera to give out clearer images.

 

Advantages of using IR LED with CCTV Cameras

CCTV Cameras are a common thought when one thinks about security. IT is now becoming a common sight to see such cameras around homes, offices and also public places. Since these cameras need to work day and night and are supposed to capture all the movements that may occur within their range, it is necessary to make it efficient enough to capture things in the dark as well. The IR illuminators are devices that enable these CCTV cameras to capture images and videos that cannot otherwise be seen through a human eye. Let us see a few benefits of using IR illuminators and later IR LED lights along with CCTV Cameras.

IR Security Camera

  • The term infra red specifies that it will help capture images even in the dark when things are not clear for the human eye.
  • The infra red light is only visible to the camera and cannot be seen by anyone else. Thus making it suitable in areas where security is needed.
  • Similar to the above advantages, an IR LED is also made up to help a CCTV capture images in the dark.
  • The power consumption of these IR LED illuminators that are being used for CCTV cameras is comparatively low. Thus, it helps in saving the amount that would be spent on power bills.
  • Although the LED lights are well known for their efficient light supply, the IR LEDs focus on maintaining security and hence one would not realize whether it is on or off.
  • The use of IR LEDs with CCTV cameras is proved to be an efficient method that consumes less energy and is easy to be installed.

Thus, taking into consideration the other installation and power costs that you may have to bear while maintaining a security system; one can surely take the help of IR LED illuminators to save the further costs. Although this might not be the best solution to obtain security, this method proves to be better than simply installing a CCTV camera that will only record the movements during day time.

 

Wireless Security Cameras For Cars

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Security has become a major issue wherever you plan to go. With no place around the world that can be safe for us to go without fear, it is important that we take care of our own security. This may also help us keep the place around us secure. If we install a security camera in and around our home, we could also help our neighbors protect their home up to a certain extent. Security cameras with IR illuminators have also been high on demand as they help protection during the night. Have we ever thought about the security measures we could take while traveling? Imagine you are driving, and a drunkard dashes your car and escapes, how would you know who it was? Fortunately, you are saved, but someone else is killed in the chaos. You would need to identify the person right? Or just imagine your car has been stolen and you need to find it soon. How would you go about doing this? Read on. May be we could sort it out together.

IR Security Camera

IR Security Camera

Security cameras have been a boon for all those who have installed it, whether it is a home, an office or even a general store. With the introduction of wireless technology for almost all electronic devices, security cameras too have become wireless for a few applications. Such wireless security cameras can be used in cars and vehicles in which you would be traveling. This would prove to b the best solution for all the questions that we discussed in the previous paragraph. Security cameras in a car will help us record and keep note of each movement taking place in

Just simply installing security cameras will not do all the work. Cameras that are fitted with IR illuminators will help you capture sharp and detailed images even in the dark. Majority of the crimes like robbery, murder or even accidents usually take place in the evenings or at night. Thus, in order to have a clear vision of what exactly took place we need to have a clear video that can be obtained from a camera that has an IR illuminator along with it.

What is the need of IR illuminator in CCTV cameras?

Cameras have become an integral part of security in the present day society. It has become absolutely important to install cameras in parking lots, malls, shops, stations and various other places for security purposes. With the rise in criminals activities and vandalism, installing CCTV cameras have become a necessity. Crime cases have been solved majorly because of CCTV footages. A decade ago, there was a mammoth rise in the number of crimes after dusk. The reason was the overpowering darkness that paved the way for criminal activities. Though technology was coming up with constant inventions, it could not beat the darkness. Most CCTV cameras that were designed those days worked flawlessly during the day time in strong light but failed to provide even a tiny bit of help after sun down. CCTV footages failed to cater to the demand of the situation as they were designed to capture and record images only in strong intensity of light. The introduction of IR  in the market was no less than a revolution. It increased the parameters of security by multitudes. IR illuminators are specially designed to record images at very low light or even absolute darkness.Image

Let us have a look at the working principle of an IR illuminator in CCTV cameras. IR illuminators were initially designed to capture images at very low light. With the advancement in technology, in no time IR lamps were able to capture images in absolute darkness. There is an inbuilt illuminator in this system that lights up when the intensity of light is lower than a predefined value. This value is predefined by the manufacturers of the illuminator and works according to the camera specifications. Most IR illuminators produce colored videos in strong intensity of light and black and white videos in low intensity of light.  These cameras are vandal proof and can combat changes in weather without the help of any other traditional supporting accessories. Most indoor IR illuminators give a very clear picture in both low and strong intensities of light. Indoor illuminators face a lot of obstructions due to other signals that interfere with the original signals required to produce the desired videos. Noise appears as small dots throughout the video as a result of interference. But with Infrared illuminators, you can look forward to getting clear pictures in light as well as dark conditions.

The IR Illuminators are available with long wave, mid wave and short wave spectral sensitivity that allows the fast measurement of temperature in real time. Infrared light is not visible to the human eye. Hence, even if Infrared illuminators are set up as safety measures, intruders will not be aware of the set up. To enhance the accuracy of these cameras, programmers have made sure that the up to 780000 temperature measurements are traced by the thermal images, overcoming the hurdles caused due to television signals, telephone lines and other such devices. Over the years, engineers have tried hard to optimize the sensitivity of IR illuminators.

Benefits of Infrared illuminators  

Noise can be the greatest source of obstruction consuming both bandwidth and CPU cycles. Once noise gets intermingled with the required signals, it becomes almost impossible to retrieve the original signals. The intermingling of noise with the original images not only produces unnecessarily large file size but also creates extremely poor quality video footage. IR Light will help to keep these obstructions at bay giving a better quality video as an output.

Another reason of poor quality video is the glare produced by other sources of light. The glare causes the uneven distribution of light throughout the video, thereby reducing its contrast ratio. The use of infrared can reduce the glare and produce better quality pictures. Their pixel size is large and hence they can absorb more light.

No wonder why IR are selling like hot cakes and have become an integral part of CCTV cameras. After all, there should be no compromise when it comes to security and these Infrared illuminators ensure just that.

Working of Passive Infrared Sensor

An Electronic sensor that senses infrared (IR) light emitted from objects such as IR Illuminators when found within a certain range is called a Passive Infrared Sensor or PIR sensor. PIR sensors are usually used in PIR based motion detectors in order to check the movement of an object.

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Working of PIR Sensors

Every object that has a temperature above zero degrees emits energy in the form of radiations. This form of radiation is usually invisible to the human eye. It gets detected by devices that are specially designed to detect such kinds of radiations. The “P” in the PIR sensors stands for passive. This is because the sensor does not release any form of radiation or energy to detect objects. In fact, it detects the radiations emitted by the other object that may be within its field of view. Though these sensors do not have to emit any sort of energy, they are the most complicated sensors as compared to others like photocells. Let us go, through the basic of the actual working of a PIR sensor.

The Passive Infrared sensor has two main slots in it. Each of these slots is constructed in a way that they are more sensitive to IR lights. There is a lens attached in between. This lens helps in widening the area that is being detected. The two slots detect the slightest movement taking place within their reach. When the sensors are idle, i.e. there is no movement around the sensor, both the slots show the same amount of IR detected. When a warm body, such as a human or an animal comes closer to the sensor, one half of it is intercepted and this causes a positive differential change among the two slots. By the time the body moves out of the range, it causes a negative differential change.

PIR Sensors are useful in detecting minute changes in temperature as they can also detect radiations from Infrared Illuminators that are not visible to the human eye. It will prove to be helpful in detecting movements in areas where entry is restricted.