First, the light source of the electric light source
1. Resistive luminescence, which is a method of illuminating by the use of the inherent resistance of the conductor itself to generate a thermal effect to achieve a hot level. Such as commonly used incandescent lamps, iodine tungsten lamps.
LED electric light source 2. Arc light emission, which is a force method that uses a discharge of a two electrode to generate a high thermal arc and emit light. Such as carbon lamps.
3. Gas luminescence, which is a method of injecting a rare gas and a metal vapor into a transparent glass tube, and using a two-pole discharge to cause the gas to heat up and emit light. Such as sodium lamps, xenon lamps, etc.
4. Fluorescent luminescence, which is a kind of injecting a thin gas or a trace of metal into a transparent glass tube, and coating a phosphor on the inner wall of the glass tube. After the discharge of the two poles, the luminescence of the gas is used to absorb the phosphor and then emit another A method of light, such as a fluorescent lamp.
Second, the way to start the electric light source
1. Voltage adaptive, such a bulb, as long as it is given a rated voltage to work properly. Such as incandescent lamps, bromine tungsten lamps.
2. Auxiliary trigger type. This type of bulb supplies its rated voltage. It does not work, but requires an auxiliary trigger voltage higher than the rated voltage to start before it can work, such as fluorescent lamps, projection lamps, and so on.
Different types of electric light sources have different structures, but generally have the following parts: filaments, electrodes, phosphors as illuminants; glass, translucent ceramic tubes, quartz tubes as illuminator shells; Guide wire, stem, lamp holder; various gases, mercury, metals and halides as fillers; getter, various coatings, insulation and adhesives.
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