Two thermal radiation infrared light radiation phenomenon is extremely common

Infrared diode current is too small, will affect the radiation power play, but the current is too large will affect their work life, and even infrared diode burned. Infrared light-emitting diode volt-ampere characteristics very similar to ordinary silicon diodes. When the voltage across the positive threshold voltage (about 0.8V or so) current starts to flow, and is a very steep curve, indicating that the operating current of the voltage sensitive. Thus requiring accurate voltage, stability, or affect the radiation power of the play and its reliability. Infrared light-emitting diode radiation power increases with the ambient temperature (including its own heat generated by the environment temperature) will decrease its radiated power. Infrared light, especially long-distance infrared light, heat loss is the design and selection should pay attention to the problem.   cell phone jammer will have the normal dissipation as the working time accumulates. Maximum radiation intensity of infrared light-emitting diode in the optical axis of the general front, and with the optical axis direction and the angle of the radiation increases. Radiation intensity of 50% of maximum radiation angle is called angle of half intensity. Different types of packaging process of the radiation angle of the infrared light-emitting diode is different.
Two thermal radiation infrared light radiation phenomenon is extremely common, objects produced at lower temperatures all infrared radiation, so the human eye can not be directly observed.
Light is an electromagnetic wave, its wavelength range from several nanometers (10-9m) to 1 millimeter (mm) or so. Visible to the human eye is only part of, we call visible light, visible light wavelength range of 380nm - 780nm, from long to short wavelength visible light into red, orange, yellow, green, blue, blue, purple, violet wavelengths than as short UV wavelengths longer than infrared light called infrared light. Ordinary black and white CCD camera can not only feel the visible light, infrared light and can feel.The range can be enlarged after adding the directional antenna of    cell phone jammer     . This is the use of ordinary black and white CCD camera, with infrared light can be more economical to implement the basic principles of night vision. The general color camera can not feel the infrared light, it is not used for night vision. Third, the type of infrared light infrared light into its mechanism of infrared radiation-emitting semiconductor solid (infrared emitting diode) light and infrared radiation infrared light two. The principle and characteristics we described as follows: an infrared emitting diode (LED) infrared light emitting diode matrix formed by the infrared light.Therefore, it becomes extremely urgent to install   cell phone jammer system in prisons. Infrared radiation from the infrared emitting diodes and high efficiency materials (commonly used GaAs GaAs) made of PN junction, PN junction plus the forward bias injection current to stimulate the infrared light. Spectral power distribution for the center wavelength of 830 - 950nm, about half-peak bandwidth of about 40nm, which is the narrow distribution, as an ordinary black and white CCD camera can experience the range. Its biggest advantage is completely red storm, (the use of 940 ~ 950nm wavelength infrared tube) or only weak red storm (red storm is a visible red light) and long life. Infrared light-emitting diodes transmit power with irradiance μW/m2 said. In general, the infrared radiation power is proportional to the forward operating current, but close to the maximum forward current rating of the device due to the temperature of the heat consumption of the current rise in the optical launch power down.Normally, the    cell phone jammer      system installed in the prison will be installed at a high position or a relatively hidden position so that it wouldn’t be easy to be found.