Halogen Light-emitting Principle and Working Principle

Emitting Principle

All incandescent light principle is the use of the object emitting heat and thermal radiation theory and principles to achieve the most simple to the filament incandescent lamp is turned on enough current, filament heating to incandescence, we will send light, but this incandescent lamp life will be quite considerable shorter.

We saw the reason for using the following incandescent technology, its purpose is to make incandescent lamps have a longer life and more convenient to use: Vacuum tube (to reduce the degree of oxidation filament), light foot (easy you will Bulbs inserted in the lamp holder), filled with an inert gas (reducing filament degree of oxidation at high temperatures), etc.

Working Principe

Halogen incandescent bulbs with the biggest difference is that the point is that the halogen lamp glass envelope is filled with some of the halogen element gas (usually iodine or bromine), which works as follows:

When the filament heats up, the tungsten atoms are evaporated to a glass wall direction, when close to the glass wall, the tungsten vapor is cooled to about 800 ℃ and halogen atoms combine to form a tungsten halide (iodide, bromide, tungsten or tungsten). Tungsten halide continues to move to the central tube, and oxidized back to the filament, as a tungsten halide is a very unstable compound and then re-heated steam into the halogen and tungsten, and the filament so that the tungsten deposited on, make up for being part evaporated.

By this recycling process, the filaments are not only greatly extend the service life (almost 4 times the incandescent lamp), and because the filament can operate at higher temperatures, resulting in a higher brightness, higher color temperature and higher luminous efficiency.


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