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. 2015 Feb 19;6(3):859–869. doi: 10.1364/BOE.6.000859

Fig. 1.

Fig. 1

Block diagram of the RM-DIC microscope. By changing the direction of the rotary polarizer, the phase difference between two beams split by Nomarski prism (beam a and beam b) can be modulated. The distance between beam a’ and beam b’ is the shear amount.