Phenomenological and mathematical analyses of oblique incidence in total-internal-reflection phase retarders and the procedure for constructing extremely achromatic quarter-wave retarders are presented. It is shown that the retardance can assume the same value twice at two definite spectral lines. As an example, a quarter-wave phase retarder is described that introduces a retardance of exactly 90° at two He–Ne laser lines of 632.8 and 1150 nm with a maximum deviation of 0.007° for other wavelengths between these two lines. This application is advantageous in conjunction with two-line and multiline lasers where the radiation is usually pumped in a state of circular polarization.
© 1997 Optical Society of America
Original Manuscript: April 24, 1996
Revised Manuscript: July 23, 1996
Published: March 1, 1997
N. N. Nagib, "Theory of oblique-incidence phase retarders," Appl. Opt. 36, 1547-1552 (1997)