We all know that as long as good quality products can pass the test of living time, what problems should be paid attention to when choosing infrared products?
1、 The characteristics of infrared lamp are as follows:
There are four kinds of light sources on the market now:
1. Halogen bulb with filter: the irradiation interval is far, the power is large, but the energy loss is also large. Because of the filter, most of the visible light is filtered out and converted into heat energy. Therefore, the service life of this kind of infrared lamp is very short, and there are many problems in after-sales service;
2. Laser tube: the irradiation interval is the farthest, but the view point is very small. If the view point is increased, due to the limited energy, the interval is relatively shorter. It can be seen that the laser tube used in the security industry is very contradictory;
3. LED light emitting diode: this kind of LED light-emitting diode is widely used. The life of a single tube is very long, but if there are more tubes, the current will be large, and if the heat goes up, the life will be shortened. At the same time, high current may cause fire hazard. However, these disadvantages can be prevented.
4. Multi chip small LED (array type): due to its inherent defects in structure, there is no luminous focus, the luminous optical system is unreasonable, and the useful light efficiency is relatively low, and its advantages are not effectively played out. For example, array LED has a current of more than 1000mA, which is only the size of a penny, so heat dissipation has become a problem. LED is most afraid of high temperature operation. At the same time, the production requirements of multi chip LED are very strict, each chip can not have a little difference in performance, otherwise it will constitute a thin defect, a chip broken will be scattered to the whole machine.
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First of all, we all know that the lamp body is hot, so if the lamp heat dissipation is good, the life of the infrared lamp will be relatively extended. The lamp shells of regular manufacturers are all cast aluminum spray molded, with heat sink and fan; and small companies choose the aluminum alloy iron shell and even stainless steel shell that can be bought everywhere on the market. Although the shape of the lamp shell is beautiful, it can dissipate heat Poor performance, will severely shorten the life of LED. In addition to choose a good lamp shell, the selection of circuit board is also very important.
Although the general PCB circuit board does not affect the operation of general equipment, its heat dissipation and thermal conductivity are poor, which can not conduct the heat generated during led operation to the lamp shell in time and quickly. Instead, due to the poor thermal conductivity, the heat is concentrated on the PCB circuit board itself. Especially for the equipment with high heat output such as infrared lamp, no matter how good the lamp shell is. The selection of double-layer aluminum substrate can well deal with the problem that the heat of LED cannot be quickly dissipated. It adds a layer of aluminum heat sink in the LED and PCB circuit board, which not only does not affect the normal operation of LED, but also makes the heat generated during led operation transmit to the cast aluminum lamp shell in time and quickly, so as to ensure the stable operation of the whole equipment and extend the service life of the equipment as far as possible.
Secondly, it is to look at the number of lamps. For lamps with the same interval, of course, the less the number of tubes, the longer the life of the infrared lamp. For example, if a 200 meter infrared lamp uses nearly a thousand tubes, then the life of the lamp will not exceed two years. Such a product is not available for after-sales service. The reason is very simple, with good quality lamps, infrared radiation power is large, energy loss is small, life is long, and the price is relatively high.
Another point is the matching problem of night vision system. Many projects require that the night vision interval is far, so it is not easy to achieve the desired results. Generally speaking, the ability of the colorful non day night conversion camera (single CCD) to receive infrared light is weak. The dual CCD camera can better deal with this problem, but the price may be slightly higher; the lens with smaller aperture value and suitable focal length should be selected for lens selection.
For more information about laser tube and carbon dioxide laser tube manufacturer of Shanghai Shanpu Laser Technology Co., Ltd., please contact editor.