Double-layer ThF4–ZnS coatings on a prism of KCl, KBr, and KI are optimized to give totally reflecting quarter-wave retarders at a wavelength of 10.6 μm. The influence on the design parameters of the light absorption occurring at high temperatures is described.
© 1991 Optical Society of America
Original Manuscript: October 12, 1990
Published: October 1, 1991
E. Cojocaru, T. Julea, and F. Nichitiu, "Infrared thin-film totally reflecting quarter-wave retarders," Appl. Opt. 30, 4124-4125 (1991)