According to analysis, each country is a system, and the system is strong or has unruly people. What kind of social development is inseparable from everyone’s supervision, whether it is for the purpose of cracking down on crime prevention or supervising social behavior, Infrared camera monitoring plays an irreplaceable role. The application range of infrared cameras The development of security technology has been paid more and more attention by all sectors of society. The scale of the domestic security market has also grown gradually since the new century, and the functional requirements of users for security products have also changed. Measuring Tape,Metric Tape Measure,Rolling Tape Measure,Metric Tape SHANGQIU CHAOYUE MEASURING TOOLS CO., LTD , https://www.calibrateds.com
In the past, only visible light monitoring could no longer meet people's monitoring requirements. Night light monitoring is an indispensable part of the current monitoring system. In the past video surveillance system engineering, infrared light was rarely applied.
Nowadays, people's requirements for TV monitoring system engineering are becoming more and more standardized, and they are getting higher and higher. It is natural to require 24-hour continuous monitoring for important places. The role of infrared rays in night surveillance is more prominent.
Not only in the vault. It is used by important departments such as oil depots, armory, library, cultural relics department and prison. It is also used in general monitoring systems.
Infrared is also applied to TV monitoring projects in residential areas. Infrared technology has come into being in order to adapt to the application in special places such as nighttime or dark light and no light. It is widely recognized throughout the video surveillance arena. Infrared integrates various technologies such as camera and infrared, and its components are equipped with lens and infrared light.
These three have different important responsibilities in the entire infrared. Infrared sales have now surpassed the sales of traditional guns. As the main export force of many private security enterprises in China, we can even see the simple innovation of this kind of LED infrared light module.
Infrared light selection is an electromagnetic wave with a wavelength ranging from a few nanometers (1 nm = 10,9 m) to about 1 mm (mm). The human eye only sees part of it, which is called visible light. The wavelength range of visible light is 380nm-780nm. The wavelength of visible light is red, orange, yellow, green, cyan, blue and violet, and the wavelength is shorter than purple. For ultraviolet light, a wavelength longer than red light is called infrared light. The selection of infrared light in the night vision system will directly affect the imaging effect of the camera.
Infrared halogen lamp is a more traditional technology, which has low energy consumption, large heat generation, short service life and low efficiency. Due to its low cost, LED infrared lamps have become the most widely used infrared illuminating devices. The disadvantages are that the illumination distance is close (the optical output of a single LED is 5mw-15mw), and the angle is small (7 to 12 degrees).
Multi-chip LEDs (and LED arrays), LED infrared lamps are not illuminated enough because of insufficient energy, more chips are brought together, of course, the energy is large and the illumination distance is farther. However, due to the possible structural defects, the multi-chip LED has no illumination focus, and the illumination system is unreasonable, resulting in relatively low useful light efficiency. LED infrared lamps generate large amounts of heat, and multi-chip LEDs generate more heat, so heat dissipation is very important and can seriously affect life.
The single-chip LED has simple production process, easy quality assurance, low heat generation and reasonable illumination optical system. It is an ideal device for infrared lamps. In theory, the service life can reach more than 100,000 hours.
The maximum illumination distance of the infrared light depends on the weather conditions, the reflectivity of the object and the surrounding light level. The farthest projection distance of the infrared spotlight is as follows. This value is ideal, not absolute.
The angle of view of the infrared light is not as large as possible. Therefore, some people think that the larger the angle of the infrared light is, the larger the room for the lens is. The wide-angle lens does not have a "flashlight" phenomenon. The use of large-angle infrared lamps with small-angle lenses has a waste of light. In general, the angle of the infrared light is consistent with the angle of the lens, and the effect is optimal.
Selection of Infrared Camera Lens The amount of light passing through the lens or the relative aperture determines the light-passing ability of the lens. The amount of light passing through the lens with a relative aperture of F1.0 is four times that of the lens with a relative aperture of F2.0. The same camera, infrared light, the above two kinds of lenses, the infrared distance can be doubled. The large aperture lens is four to ten times better than the conventional ordinary lens. It is reasonable to say that it should be an essential accessory for infrared night vision monitoring. However, due to the high cost and difficult manufacturing technology, most infrared product manufacturers do not have the ability to supply. .
[ Huaqiang Security Network News ]