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How does the high pressure sodium lamp operate?

High pressure sodium lamp can be a quite higher luminous efficiency from the light source, its efficiency could be as much as a hundred LM / W, sodium lamp is divided into two types of large pressure and low pressure sodium lamp. A discharge tube made of a specific glass is created of the unique glass within the glass situation, plus the tube is full of an acceptable level of sodium, mercury drop and inert fuel, the discharge tube plus the glass shell are pumped into a vacuum to cut back the influence with the ambient temperature about the lamp. Reduced stress sodium lamp amplitude injection soft yellow light, it could be divided into two varieties of DC and AC, the luminous efficiency than incandescent lamp substantial more than 10 occasions, can penetrate with the smoke, ideal as lighting in spot to smoke extra, also can do polarimeter, Polarimeter, refraction currently optical instruments this kind of as monochromatic light supply, the lamp discharge tube standard company growth and narrow the U shape, the temperature to continue to be at about 270 degrees, sodium vapour five Torr, so making use of a coated with infrared reflective film coat. And vacuum, so that you can lower the discharge reduction. Sodium beneath 98 degrees is strong, its vapor strain is quite low, is not really quick for making discharge arc, so as to make the lamp starting voltage reduction, inside a discharge tube filled with neon, and mixed with much less than 1% argon, even though argon micro, but can make the lamp beginning voltage decreased by about 50%. Due to the large temperature of the chemical reaction of sodium vapor is incredibly solid, could be corrosive to most styles of glass.

So the glass wall on the discharge tube is covered which has a layer of sodium glass layer. Additionally the discharge tube may also be used with high temperature sodium won’t reflect the translucent or transparent alumina ceramics made of corundum. The fundamental framework of high pressure sodium lamp, mainly composed of filaments, bimetal thermal relay, discharge tube, glass shell, composition, put appliances made of translucent polycrystalline alumina ceramic, filled with mercury and mercury sodium agent, can produce incredibly substantial pressure mercury vapor, filament by a tungsten filament manufactured spiral or woven to the form of the selected volume of alkaline earth metal oxides might be stored, when the heating filament, alkaline earth metal oxide emission of electrons. The role of double metal is: when the lamp is linked to a energy supply, present through the ballast, thermal resistance, double metal tablets to kind passageway, thermal resistance heating, double metal pieces are disconnected, instantaneous self induction electromotive force generated from the ballast to inner tube of inert gasoline ionization discharge, temperature, Mercury also with gasification discharge along with the sodium a gas discharge light 3, metal halide lamp metal halide lamp primarily depend upon metal halide as being a luminescent material, metal halide in the form of sound presence from the lamp. Consequently, a tiny volume of hydrogen ignited gas or xenon lamp have to be filled, to ensure light bulb.

The lamp is ignited, the 1st function while in the state of very low pressure arc discharge lamp, bipolar voltage is incredibly lower at this time, about 18 ~ 20V, the light output is tiny, then the principle production of heat, in order that the whole body heating lamp, metal halide lamp is launched together with the increase of temperature to evaporate, grow to be metal halide vapor, the heat convection impact following, carry on to movement on the arc center, component in the metal halide arc was 5500 ~ 6000K higher temperature decomposition, a metal atom as well as halogen atom, below the action on the electric field, the metal atoms are energized; the other portion of your metal halide can’t be decomposed by electrical arc of high temperature, large temperature and electrical field from the dual purpose, right stimulate the formation of molecular light is actually a xenon lamp

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