The properties of zero-order retardation plates fabricated from mechanically stretched phase- separated glass are presented and discussed. The dissolved stretched phase is silver halide. The values of the birefringence as a result of the elongated silver halide phase are studied as a function of the average particle aspect ratio and wavelength. The (lambda) /4 and (lambda) /2 thicknesses required for the wavelength interval 633 - 1520 nm were 0.5 - 3.0 mm. Advantages in the use of these glass waveplates in devices such as circular polarizers are discussed.
Nicholas F. Borrelli,
Claude L. Davis,
"Waveplates from stretched glass", Proc. SPIE 1746, Polarization Analysis and Measurement, (11 December 1992); doi: 10.1117/12.138807; https://doi.org/10.1117/12.138807