... light transmission are particularly good, and through the ultraviolet, infrared. Quartz glass is a good acid-proof materials, in addition to ... source areas: Do high-pressure mercury lamp, a long arc xenon lamp, tungsten, thallium iodide lamp, infrared lamps and germicidal lights. Semiconductor areas ... of germanium, silicon crystal in the crucible, boat pan heater core pipe and the bell and so on. In the ...