人类能够制造紫外光源,还是本世纪卅年代以后的事。在当时,汞灯是唯一的人工紫外光源。尽管在1935年世界上第一支高压汞灯问世,但人工紫外光源获得实际应用,还是在石英玻璃问世和解决了大功率封接之后,才走向真正有价值的应用阶段。五十年代以前的紫外光源都是不完善的,灯的紫外辐射强度也较弱,紫外光谱频带也很狭窄。四十年代的高压汞灯,尽管比当时的炭弧灯和太阳光单位面积上紫外辐射的能量强,但受到封接的限制,灯的紫外辐射效率还很低,灯的功率还不能做得很大。所以汞灯不论在紫外光谱输出上,还是 Human beings can make UV light sources, or something after the turn of the century. At the time, mercury lamps were the only artificial UV light source. Although the world’s first high-pressure mercury lamp was introduced in 1935, the artificial UV light source was used in practical applications, and it was only after the quartz glass came out and the high-power sealing was solved before it went to a truly valuable application stage. Before the fifties UV sources are imperfect, the lamp UV radiation intensity is also weak, the UV spectrum is also very narrow. In the 1940’s, high-pressure mercury lamps were more energy-efficient than ultraviolet radiators per unit area of ​​carbon arc lamps and sunlight at the time, but their sealing was limited by the low UV radiation efficiency of the lamp and the power of the lamp could not be done Great. Therefore, whether in the mercury lamp UV output, or