Classification of light sources
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① Burning and glowing;
② Incandescent light: incandescent lamp, halogen hook lamp;
③Gas discharge light: fluorescent lamps, mercury lamps, sodium lamps, metal halide lamps;
④Electroluminescence, laser: electrodeless lamp, island lamp Note: LED is the photoelectric effect of crystal, which belongs to the "cold light source" solid-state light source. Incandescent lamp belongs to the first generation of light source, and ordinary light source is the second generation of light source. In addition to the light bulb, other gas discharge lamps are the first The third-generation light source, the fourth-generation light source (X-ray laser) is a new generation of light sources that people are exploring after the third-generation gas discharge light source. It is much better than the third-generation gas in terms of brightness, coherence and time structure. Discharge light source.
Classification of light sources
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