论文信息 - Modulation of Moiré pattern using birefringent sample

Modulation of Moiré pattern using birefringent sample

Moiré pattern, produced by the overlapping of two radially sheared beams emerging from two longitudinally shifted focal points of a birefringent lens has been experimentally demonstrated. Coherent and incoherent Moiré patterns are generated with and without analyzer. Birefringent samples like mica sheets with opposite crystal axis to that of the birefringent lens modulate the Moiré pattern. Mica sheet of different thicknesses have been used to demonstrate the effect of thickness on phase retardation, hence on fringe pattern. Experimentally birefringence has been calculated by fringe analysis and compared with theoretically simulated birefringence.

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