Figure 2
From: Thin film notch filters as platforms for biological image processing
The experimental transmission response of the filter obtained by incrementally rotating the filter (a). The dashed line in (a) indicates the band-stop wavelength of 633Â nm and the arrows indicate the width of the band-stop region at normal incidence. The modulus-square of the modulation transfer function along \(k_y=0\) for various polarizations (b) is compared to data provided by the manufacturer. Linear fitting of the modulation transfer function for circular polarization in the contrast zone is given in (c).
