Variable Dielectric Circular Beamsplitters for Excimer Lasers

The Variable Dielectric Circular Beamsplitters are designed to split laser radiation in wavelength from the extreme UV to the Far IR. The catalog filters are coated on a standard fused silica substrate with a graded all dielectric beamsplitter coating. The substrate and coating have very low absorption. As the filter is rotated, the ratio of R/T will vary from 10% to 90%. Thus it is possible to set any desired reflection / transmission ratios between 10% and 90%. For eximer application the coating should be applied to Schlieren quality Dynasil 4100, Corning 7940 or Suprasil 1.