... is very good, and through ultraviolet ray, infrared. Quartz glass is good acid materials, except hydrofluoric acid and ... arc xenon lamp, halogen lamp, thallium iodide light, infrared light and germicidal lamp, etc. Semiconductor aspects: is ... , do radar on the ultrasonic delay line, infrared tracking direction finding, infrared camera, newsletter, spectrograph, spectrophotometer of prism, ...