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A halogen lamp (also called tungsten halogen, quartz-halogen, and quartz iodine lamp) is an incandescent lamp consisting of a tungsten filament sealed in a compact transparent envelope that is filled with a mixture of an inert gas and a small amount of a halogen, such as iodine or bromine.
The bulbs used are referred to as lamps. Stage lighting instruments typically use incandescent lamps, tungsten-halogen lamps, encapsulated arcs, or LEDs. [1] Most theatrical lamps are tungsten-halogen (or quartz-halogen), an improvement on the original incandescent design that used halogen gas instead of an inert gas.
In quartz halogen lamps, ... Quartz heater. Quartz tungsten infrared heaters emit medium wave energy reaching operating temperatures of up to 1,500 °C (2,730 °F ...
The tungsten halogen curing light, also known as simply "halogen curing light" is the most frequent polymerization source used in dental offices. [6] In order for the light to be produced, an electric current flows through a thin tungsten filament, which functions as a resistor. [6]
On fixtures without instant restrike capability, a momentary loss of power can mean no light for several minutes. For safety reasons, some metal-halide fixtures have a backup tungsten-halogen incandescent lamp that operates during cool-down and restrike. Once the metal halide restrikes and warms up, the incandescent safety light is switched off.
High-intensity discharge lamps (HID lamps) are a type of electrical gas-discharge lamp which produces light by means of an electric arc between tungsten electrodes housed inside a translucent or transparent fused quartz or fused alumina arc tube. [1] This tube is filled with noble gas and often also contains suitable metal or metal salts.
The development of quartz halogen linear lamps allowed much higher power density up to 200 watts/inch of lamp (8 w/mm), useful for industrial heating, drying and processing applications. [3] By adjusting the voltage applied to incandescent lamps, the spectrum of the radiated energy can be made to reduce visible light and emphasize infrared ...
Quartz-tungsten halogen lamps (QTH lamps) offer spectra which very closely match black body radiation, although typically with a lower color temperature than the sun.They are a type of incandescent lamp where a halogen such as bromine or iodine surrounds a heated tungsten filament. [15]
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