Thermal radiation phenomenon is very common, the object in the low temperature generated when the heat radiation is all infrared light, so the human eye can not be directly observed. Mini IR Illuminator When heated about 500 degrees, will produce dark red visible light, with the temperature rise, the light becomes brighter and more white. In the heat radiation source by heating the filament to maintain its temperature, for the radiation continue to proceed. Maintain a certain temperature and the energy supplied from the outside is balanced with the energy reduced by radiation.
According to the above principle, Mini IR Illuminator the special design and technology made of infrared light bulbs, the infrared light components up to 92 ~ 95%. Foreign production of such infrared light bulb technical performance: power 100 ~ 375W; power supply voltage 230 ~ 250V; service life of 5000 hours, radiation angle of 60 to 80 degrees.
Ordinary black and white cameras feel the spectral frequency range is also very wide, and infrared bulbs can generally be made of relatively large power and large irradiation angle, it can be used for long-distance infrared light, which is its biggest advantage. The biggest shortcoming is the inclusion of visible light components, that is, red storms, and short life, if working 10 hours a day, 5000 hours can only use more than a year, consider the heat is not enough, life is shorter. And for customers, the replacement of light bulbs is troublesome and unpleasant things.
In the heat radiation to overcome the shortcomings of a lot of efforts, the first is the development and application of high-pass infrared filter tempered glass. The longer the wavelength, the smaller the red storm, or even no red storm, but the lower the efficiency of infrared light, Mini IR Illuminator the higher the infrared light fever. The wavelength of infrared glass can be selected according to the requirements of the user to the level of red storm, in general, the same effective irradiation distance, the higher the requirements of the red storm, the higher the cost. Infrared glass after steel, can withstand the rapid changes in the emergency, in the internal infrared light bulb due to visible part of the filter, the conversion of heat, Mini IR Illuminator the temperature will be high, the external cold and rain and snow under the raid, quenching without damage. In order to improve the life of the infrared radiation, the use of light control switch circuit to reduce its working time; using a variable voltage regulator rectifier circuit, so that the luminous power can be fully developed and improve the life of the infrared lamp; Is to consider the filament cold resistance is very small, such as 100W infrared light bulb, Mini IR Illuminator filament thermal resistance of 529Ω, then the current is only 0.4348A, while the cold resistance is only 36Ω, infrared light connected to the power instantly 6.39A instantaneous power to 1470W , This moment the filament load overload of several times, Mini IR Illuminator which has a very large impact on the filament life. People developed the filament protection circuit, I believe the working life of infrared light bulbs will grow exponentially. In addition, Mini IR Illuminator a delay switch circuit is added to prevent ambient light interference.