History of Halogen Lamp
Definition of Halogen Lamp A halogen lamp, also known as a tungsten halogen lamp or quartz iodine lamp, is an incandescent lamp that has a small amount of a halogen such as iodine or bromine added. The combination of the halogen gas and the tungsten filament produces a halogen cycle chemical reaction which redeposit evaporated tungsten back on the filament, increasing its life and maintaining the clarity of the envelope. Because of this, a halogen lamp can be operated at a higher temperature than a standard gas-filled lamp of similar power and operating life, producing light of a higher luminous efficacy and color temperature.
- A carbon filament lamp using halogen to prevent darkening of the envelope was patented in 1882 .
- The chlorine-filled "Novak" lamps were marketed in 1892
- The use of iodine was proposed in 1933
- Elmer Fridrich and Emmet Wiley developed the halogen lamp at General Electric in Nela Park, Ohio in 1955
- Elmer Fridrich developed the first halogen tungsten lamp prototypes with Emmitt Wiley in 1953/1959 .
- The team later developed the double ended halogen lamp in 1959
- Patents were issued in 1959 .
- The halogen was improved upon by other engineers so that it was cheaper to produce and market in 1960.
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