With the use of concepts of elementary physical optics it is shown under what conditions the application of inexact compensators to the analysis of elliptically polarized light is justified. The validity of a procedure used by Vasicek, which has been questioned, is examined in detail.
A. C. HALL, "Inexact Senarmont Compensators," J. Opt. Soc. Am. 53, 801-801 (1963)