At the design stage and device designVideo surveillance focus on providing video in low light conditions. Different devices are used to realize night-time video shooting, among them an infrared illuminator. The most popular infrared LEDs used to create the backlight for video cameras, they provide a wavelength ranging from 790 to 950 nm.
Today you can meet different partsinfrared spectrum that help solve certain problems. For example, devices with a wavelength within 790-830 nm are used in infrared illuminators. For high-quality hidden video at medium and small distances, you should use the parameter 930-950 nm. The most popular length range, which is used in night cameras, is the limit of 850-900 nm. It has a sufficient detection range, and the radiation is almost imperceptible.
The main characteristics of infrared illuminators
The infrared illuminator should be selected according to the main features, including:
- lighting angle;
- radiated wavelength;
- effective range;
- power consumption.
When it comes to the lighting sector,consider the parameters of the angle of coverage, which depend on the lens of the device. Depends on the distance and the angle. At a smaller angle, the range of the stream will be longer, this also applies to detection. As a rule, external devices have a focused beam in the central sector. This intensity is reduced to almost zero.
Outdoor camera with infrared light canwork qualitatively if the angle of coverage is greater than or equal to the angle of view. To do this, use different methods, one of the effective is to use multiple sources with different focus. If you choose an infrared illuminator, then as an example in this case, you can consider the device MVK-81 from “Byteerg”, which has a block of a pair of illuminators with interchangeable lenses. They guarantee a distance of 40 m, and the angle of illumination will be equal to 30 °.
Reviews camera MVK-81
By choosing an infrared illuminator, you canpay attention to the model mentioned in the subtitle. Consumers buy it for the reason that it has a robust case and is an analog camera that provides a color image. Inside there is a lens, and the device itself is designed for use both inside and outside the premises. Users claim that the feature of this model is high resolution, as well as the presence of two modes “day” and “night”.
Characteristics of the detection range
The detection distance is the distance from whichThe device is able to fix unauthorized entry. The parameter depends on the power of infrared radiation and the sensitivity of the device. The detection range can be increased by adding new infrared sources to the device. After the saturation limit is reached, increasing the number of diodes will not allow achieving a positive result. Focusing on the effective detection range, you should choose an infrared illuminator for video surveillance, which has outdoor IP cameras and a backlight, which guarantees the sensitivity of the matrix.
Power characteristics of flux emission
This indicator is quantitative andcharacterizes the intensity of the radiation flux, it falls on the solid angle. The parameter is expressed in watts per steradian, which looks like this: W / Stehr. It is important to bear in mind that the length of the wave emitter is not so effective with the same radiation power with a short wavelength, this is due to their low efficiency.
Reviews of technical solutions for infrared type illuminators
When consumers choose infraredspotlight, they pay attention to the varieties of technical variations. Such devices are made on the basis of halogen sources, the luminous flux of which is blocked by a light filter. These sources differ in certain indicators, among them:
- increased lighting range;
- wide power range;
- limit of the wavelength of radiation from 730-850.
As for the power consumption, it canbe in the range of 30-300 watts. But if we are talking about the average range of illumination, then it should be mentioned that this figure is 100 meters or more. Consumers point out the main disadvantages, which are expressed in the minimum lifetime and the high price of halogen lamps.
PIK infrared illuminators can have solid-state lighting sources, which use special diodes as a generator. The main advantages of using are:
- low power consumption;
- compact dimensions;
- high power;
- insignificant weight.
Reviews of projector PROvision PV-LED30C
If you need an infrared illuminator(cameras), then you can get acquainted with the features of the model, it was mentioned in the subtitle. This device can be used in open areas if it is necessary to provide illumination for impressive distances. The body is made of aluminum alloy, which, according to users, is a clear advantage. The illumination range reaches 30 m, and the angle of illumination is 30 °. The number of diodes is 6, and the wavelength is 850 nm.
Consumers note compact size.Dimensions are limited to the following parameters: 147 x 77 x 87 mm. The equipment weighs only 520 g, the body is made in black, and the device itself has a capacity ranging from 18 to 20 watts. Infrared backlight (searchlight) can be operated at a wide range of temperatures ranging from -40 to +60 ° C.
Reviews of the PIK-41 and PIK-42 searchlights
In the first case we are talking about the device, the wavelengthwhich is 850 nm, the radiation angle is 30 °, and the power range can vary from 9 to 16 V. The device has built-in protection against voltage drops. According to users, the PIK-2 projector has many similar qualities with the model described above. These devices have the same cost, and it is limited to 3550 rubles. The same can be said about the power range. However, the second device can already function at 8 V. Both devices have effective protection against pulsed voltage drops, which can occur when the equipment is turned on.
Scope of use
Infrared LED spotlight canused in outdoor cameras, domed and packageless night vision devices that have the functionality of "day-night". Their matrix perceives light in the infrared. Devices usually have a mechanical, automatic or software filter that eliminates illumination under the reflected rays. It is necessary to mention that the radiation from the camera will be black and white.
Используются данные прожекторы для усиления камер with night vision when monitoring objects with limited lighting. It can be cinemas, warehouses, office, industrial premises and so on. You may need such spotlights to protect the perimeter of the walls of impressive length. Indispensable devices when using open source lighting, which can be blinded by the participants of the movement. Installing CCTV necessarily assumes the presence of infrared illuminators.
Features of different types of infrared illuminators
According to the installation technology, the described devices can besubdivided into integrated and separate. The most versatile and powerful are infrared illuminators, which are equipped with motion sensors. These devices are characterized by high power consumption, which reaches 20 A, while in the projector there is a power supply unit of 12-24 V. You can find devices for illuminating dome cameras on sale. Some devices used in offices do not have functionality for night surveillance. To turn a conventional device into a dome camera, this kind of illumination is used.
Conclusion
В последнее время стали изготавливаться infrared webcams, which also have a night vision function. This addition allows you to achieve high-quality images with reduced lighting. In addition, it has additional features. The most useful is the ability of the device to connect to the alarm system in the home. The most convenient and popular are cameras with a wireless connection, since they can be installed anywhere in the apartment.
