Halogen Tungsten Lamp

Halogen Tungsten LampHow it WorksThe lamp is turned on and the filament begins to glow red as more current passes through it. The temperature rapidly increases. The halogens boil to a gas at relatively low temperatures

The Halogen cycleNormally tungsten atoms evaporate off of the filament and deposit on the inside of the bulb, this blackens normal incandescent lamps.As atoms leave the filament the filament gets thinner. the tungsten atoms chemically unite with the halogen gas molecules and when the halogen cools, the tungsten is redeposited back on the filament.Halogen Process

When a halogen lamp is turned on, tungsten particles evaporate from filament and attach on to bulb wall. At the same time, halogen is decomposed and becomes atomic halogen..Atomic halogen is diffused on the bulb wall and combines with free tungsten particle to become transparent and volatile tungsten halide. As the tungsten halide approaches the filament the tungsten and the halogen gas separate and the tungsten gets re-deposited on the filament.As the tungsten get re-deposited on the filament, the halogen gas is released and ready to combine again, creating the halogen regenerative cycle process.Parts of The Lamp.

MOST IMPORTANT ELEMENTS OF A HALOGEN LAMP.Tungsten Filament: Which provides Light When HeatedGas: halogen gas usually bromine or iodine.Bulb: made of quartz to withstand high temperatures.Molybdenum Foil: used as a conductor to ensure the hermetic dealing of the lamp. It enables the filament to operate at higher temperatures.

Applications And UsesTungsten-halogen lamps have been commonly used as the light sources in automobile

Halogen lamps are used as the heating element in ahalogen oven.Tungsten halogen lamps are used in the majority of theatrical and studio (film and television) fixtures, includingEllipsoidal reflector spotlights, Source Four, andFresnels.