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A schematic of MBAS-WFFM system and a stack of axially swept WFFM images. L1: achromatic lens (f = 150 mm), L2: achromatic lens (f = 150 mm), L3: achromatic lens (f = 50 mm), L4: objective lens, EF: excitation filter, BS: dichroic mirror, BF: emission filter. Red arrows indicate in-focus areas in the WFFM images.
