Optimal Design for the Beam Splitter Having High Transmitting Visible and Reflecting Infrared Characteristics

splitter having high transmitting visible and high infraal characteristics. The opthal design of the beam splitter makes use of the effusive constants of very thin Ag face as de by fitting optical hansmittance and applying a computer optimization software that can optimize combination films of metal and dielectric. The ham splifor is evaporatal under the same conditions as those ed during the experiments for determining the optical constants of very thin Ag films. The results agree well with the theoretical values.