Results of the Monte Carlo tolerance analysis as function of wavelength. The red curve shows the expectation value of the contrast. The white curves are the 0.68, 0.95 and 0.997 percentile confidence limits. The analysis indicates that within specified tolerances a contrast below 1 × 10⁻⁴ can be reached over a 15 percent bandwidth. Within the full 20 percent bandwidth the contrast is below 2 × 10⁻⁴.