Fig. 5From: A microscope using Zernike’s phase contrast method and a hard x-ray Gabor hologramExperimental results of Zernike’s phase contrast method using polystyrene sphere beads with 8 μm diameter. a I i(x i, y i) = k{1 − 2Φ(x i0/M, y i0/M)}. b k{1 + 2Φ(x i0/M, y i0/M)}Back to article page