Fig. 2From: Optical system for measuring the spectral retardance function in an extended rangeNormalized spectral intensity transmission T par (λ) for a Multiple-order QWP for 488 nm; b Multiple-order QWP for 514 nm; c Addition of the two QWPs; d Subtraction of the two QWPs. In all cases the continuous lines correspond to the simulation that best fits the experimental data. e Spectral retardance for the four cases derived after fitting the experimental dataBack to article page