... photoconduction drum, laser window materials, infrared double color detectors, photoelectric radiation, electricity radiation, manufacture of cathode ... (CdS) 1, Physical character: Molecular mass: 144.46 Refractive index: 2.51 Density: ρ =4.82 g/cm− 3 ... photoconduction drum, laser window materials, infrared double color detectors, photoelectric radiation, electricity radiation, manufacture of cathode ...